Active location

Princetown, Devon

50.50°N, 4.02°W · ~223m · 07:02 – 19:14

Updated 05:07

Temp

16°C

↓ 0.1 / 1hr

Wind

4.5

↓ 1.3 / 1hr

Condition

Overcast

Score

8.7

Excellent


Time
Condition
Precip mm
Precip %
Temp
Temp °C
Feels °C
Wind
Direction
Wind mph
Gust mph
Detail
Humidity %
Pressure
Vis km
UV Index
CAPE J/kg
Score

Tue 22 Sep																			Wed 23 Sep																								Thu 24 Sep																								Fri 25 Sep																								Sat 26 Sep																								Sun 27 Sep																								Mon 28 Sep																								Tue 29 Sep
05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00	00:00

-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.8	0.8	0.8	0.8	0.8	0.8	3.1	3.1	3.1	3.1	3.1	3.1	-	-	-	-	-	-	-	-	-	-	-
30%	30%	25%	15%	30%	30%	30%	25%	25%	15%	10%	10%	10%	15%	15%	10%	15%	25%	15%	0%	20%	25%	15%	15%	30%	35%	35%	35%	25%	15%	25%	75%	10%	20%	10%	5%	0%	0%	5%	10%	0%	0%	0%	0%	0%	0%	0%	10%	10%	10%	15%	15%	15%	15%	10%	10%	10%	10%	5%	5%	10%	0%	10%	10%	10%	10%	10%	15%	15%	15%	15%	15%	15%	15%	20%	15%	0%	0%	0%	0%	0%	0%	10%	15%	15%	20%	30%	35%	35%	35%	35%	30%	30%	30%	25%	30%	25%	25%	25%	15%	15%	15%	10%	10%	10%	10%	10%	10%	15%	20%	25%	15%	10%	5%	5%	5%	10%	15%	20%	20%	20%	20%	20%	15%	0%	0%	10%	5%	5%	5%	5%	0%	0%	10%	15%	15%	25%	30%	35%	35%	60%	90%	90%	90%	90%	90%	90%	100%	100%	100%	100%	100%	100%	40%	5%	5%	5%	5%	5%	5%	5%	5%	5%	5%

16°	16°	16°	16°	17°	17°	17°	18°	19°	19°	19°	20°	19°	19°	17°	15°	13°	13°	14°	13°	12°	12°	12°	11°	11°	14°	14°	15°	15°	16°	17°	17°	17°	17°	17°	17°	17°	15°	13°	11°	9°	9°	11°	11°	11°	11°	11°	11°	11°	11°	11°	12°	13°	15°	16°	17°	17°	17°	17°	17°	16°	14°	13°	13°	13°	13°	12°	11°	10°	9°	8°	8°	7°	7°	8°	10°	14°	17°	18°	19°	19°	19°	19°	18°	17°	16°	15°	14°	14°	13°	13°	13°	13°	13°	12°	12°	11°	11°	11°	11°	12°	13°	14°	15°	15°	16°	16°	16°	15°	14°	13°	12°	11°	11°	10°	10°	9°	8°	7°	6°	5°	5°	5°	7°	11°	14°	12°	14°	15°	16°	15°	15°	14°	13°	13°	13°	13°	13°	13°	14°	14°	14°	14°	14°	14°	14°	13°	13°	13°	13°	13°	13°	12°	-	-	-	-	-	-	-	-	-	-	-
17°	17°	16°	16°	18°	19°	19°	20°	20°	20°	20°	20°	20°	19°	18°	16°	14°	14°	14°	12°	12°	12°	11°	11°	11°	14°	15°	15°	15°	15°	15°	16°	16°	15°	16°	15°	14°	13°	12°	10°	8°	8°	8°	8°	8°	8°	8°	8°	9°	9°	9°	9°	11°	12°	13°	14°	15°	15°	15°	14°	14°	13°	12°	12°	12°	11°	11°	10°	9°	8°	7°	7°	6°	6°	6°	9°	14°	17°	18°	19°	19°	19°	18°	18°	17°	15°	14°	13°	13°	12°	12°	12°	12°	11°	10°	10°	9°	9°	9°	9°	11°	12°	13°	14°	15°	15°	15°	15°	14°	13°	12°	11°	10°	9°	9°	8°	8°	7°	6°	5°	4°	3°	3°	6°	9°	12°	10°	12°	13°	13°	13°	13°	12°	12°	11°	11°	12°	12°	12°	13°	13°	13°	13°	13°	14°	14°	13°	13°	13°	12°	12°	11°	11°	-	-	-	-	-	-	-	-	-	-	-

ENE	ENE	ENE	ENE	ESE	W	SW	WNW	SSW	S	S	S	SSW	SSW	SSW	SSE	SSW	NE	E	ESE	SE	SE	ENE	NE	WNW	NNW	NNW	NW	NW	NW	WNW	NW	WNW	NW	NNW	NNW	NNW	N	N	NE	N	N	ENE	ENE	ENE	ENE	E	E	ESE	ESE	ESE	ESE	SE	SE	SSE	SSE	SSE	SSE	SSE	SSE	SSE	SE	SE	SE	SE	SE	SE	SSE	SSE	SSE	SE	SE	E	NE	NNE	NNE	N	N	NNW	NW	W	WNW	NW	NW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	N	N	N	N	N	NNE	NNE	NNE	NNE	NNE	N	N	N	NNW	NNW	NNW	NNW	NNW	NNW	N	N	NNE	NNE	NE	NE	ENE	E	ESE	SE	SE	SSE	S	SSW	SW	SW	SW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	S	S	S	S	S	SSE	SSE	SE	ESE	ESE	E	ENE	ENE	NE	NNE	NNE	N	NNW	N	N	N	N	N	N	N	N	N	N	N
4	3	5	6	3	2	2	3	4	6	5	5	5	5	3	2	0	1	4	4	2	1	2	1	2	2	2	5	8	8	10	9	9	12	10	11	11	9	5	2	2	3	6	9	11	10	9	8	7	8	8	12	13	14	14	13	13	13	12	11	10	8	6	6	6	6	6	4	3	2	1	1	1	2	2	2	1	1	2	3	4	5	7	8	8	8	7	8	8	9	9	9	9	9	8	7	7	7	7	7	7	6	5	4	3	3	3	4	4	4	4	4	4	4	4	4	4	4	3	2	2	1	2	3	5	7	8	9	10	10	10	9	9	8	8	8	8	8	8	8	8	7	6	6	4	4	4	4	5	6	7	8	9	-	-	-	-	-	-	-	-	-	-	-
9	6	10	12	6	4	5	6	9	11	10	10	9	9	7	4	1	4	7	8	4	3	5	4	5	5	5	11	15	16	19	18	18	23	20	23	21	18	12	6	6	7	16	20	23	21	18	15	13	14	15	21	24	26	26	25	24	23	23	21	18	14	11	10	11	10	9	6	4	3	2	1	1	2	3	3	3	3	5	7	10	12	15	16	16	15	14	14	15	16	16	17	16	15	14	13	13	12	12	12	13	13	11	9	8	8	8	8	7	6	6	6	6	7	7	6	6	5	4	3	2	2	2	5	9	13	14	17	19	19	18	17	16	14	13	13	13	14	14	14	14	13	11	9	7	6	6	6	8	10	13	15	16	-	-	-	-	-	-	-	-	-	-	-

93	94	94	94	91	93	91	84	82	87	79	74	77	82	89	93	96	98	98	83	91	97	99	99	97	97	99	98	94	86	85	80	78	85	77	68	66	69	75	87	87	87	79	75	75	75	76	80	84	88	91	90	85	80	77	74	72	71	72	74	79	86	91	92	90	90	92	94	96	97	98	99	100	100	98	92	83	76	72	69	68	68	69	72	79	88	95	98	98	98	98	97	96	95	93	92	92	91	90	87	82	78	76	74	72	69	66	66	72	80	86	87	86	85	85	86	88	91	94	97	98	99	97	91	83	77	78	74	72	73	75	79	84	88	91	93	95	96	98	98	99	99	98	97	96	95	95	95	95	96	96	97	97	-	-	-	-	-	-	-	-	-	-	-
1003	1003	1003	1003	1004	1004	1003	1003	1003	1003	1002	1002	1001	1001	1000	1001	1001	1000	1000	999	999	999	999	998	998	999	998	999	999	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000	1000	999	998	997	997	997	997	997	997	997	997	997	996	996	995	995	995	994	994	994	993	993	993	993	993	992	992	992	992	992	992	992	993	993	993	993	993	993	993	993	993	993	993	993	993	993	993	993	993	992	992	992	992	992	992	992	992	992	992	992	992	992	991	991	991	990	990	990	990	989	989	988	988	987	987	986	986	985	986	986	986	986	986	986	986	986	986	986	985	985	985	985	985	985	985	985	984	984	983	982	981	981	980	979	979	978	978	978	-	-	-	-	-	-	-	-	-	-	-
26.5	24.5	22.9	21.2	24.3	14.9	14.1	27.7	29.2	25.6	32.4	34.1	32	29.5	24	18.6	14.7	10.6	12.2	34.8	28.6	12.2	4.6	10.3	17.2	14.6	8	13.8	21.3	29.8	31	38.2	38.5	35.4	47.5	52.5	49.9	45.4	41	34.8	34.5	33.6	37.9	37.6	35.5	32.7	29.7	26.1	21.2	19.9	18.6	19.4	20.6	21.9	22.3	22.6	23	23	23.1	23.1	21.8	20.5	19.2	19.4	19.6	19.7	18.2	16.8	15.3	12.8	10.3	7.8	8.8	9.9	11	14.7	18.5	22.2	22.5	22.7	22.9	22.5	22.1	21.7	19.8	18	16.1	14.9	13.7	12.5	13.4	14.3	15.3	16.7	18.2	19.6	19.9	20.2	20.6	21.9	23.3	24.6	25	25.3	25.7	26	26.2	26.5	25.1	23.7	22.4	22.5	22.7	22.9	22.5	22	21.6	19.2	16.7	14.3	13.7	13.1	12.6	16.6	20.6	24.7	24.9	25.1	25.3	24.4	23.4	22.5	21.6	20.7	19.7	18	16.3	14.6	12.9	11.2	9.4	8.3	7.2	6.1	5	3.9	2.8	3	3.2	3.5	3.7	3.9	4.2	-	-	-	-	-	-	-	-	-	-	-
-	-	-	0.2	0.4	0.5	1.1	1.5	1.3	2.6	1.8	0.9	0.4	0.1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.3	0.9	1.4	2.2	2.2	1.9	1.5	1.3	0.5	0.2	-	-	-	-	-	-	-	-	-	-	-	-	-	0.5	1.1	1.5	1.9	2.2	2.4	2.4	2.3	2.1	1.7	1	0.1	-	-	-	-	-	-	-	-	-	-	-	-	0.7	1.8	2.7	3.5	4	4.2	3.6	2.6	1.6	1.1	0.6	-	-	-	-	-	-	-	-	-	-	-	-	-	0.4	1	1.5	2	2.3	2.4	2.3	2.1	1.7	1.1	0.5	-	-	-	-	-	-	-	-	-	-	-	-	-	0.7	1.7	2.5	2.9	3.2	3.3	3.3	3.1	2.6	1.9	0.9	-	-	-	-	-	-	-	-	-	-	-	-	-	0.2	0.6	0.9	1.2	1.4	1.5	3.4	3	2.4	1.6	0.7	-	-	-	-	-	-
0	0	0	0	10	20	20	30	20	40	20	20	10	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	30	30	50	40	30	60	20	20	20	0	0	0	0	0	0	0	0	0	0	0	0	0	0	10	10	20	20	20	20	20	20	20	10	10	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	10	10	20	20	20	20	10	10	0	0	0	0	0	0	0	0	0	0	0	0	0	0	10	10	10	10	10	10	10	10	10	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	10	10	20	20	20	20	20	10	10	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	-	-	-	-	-	-	-	-	-	-	-
7.3	8.8	8.2	7.8	10.0	8.8	8.8	8.8	7.4	8.0	8.2	8.2	8.4	8.4	10.0	10.0	10.0	10.0	8.7	8.6	10.0	10.0	10.0	10.0	10.0	8.8	8.8	6.9	6.0	7.0	6.4	6.5	6.6	4.4	6.3	5.6	6.0	6.6	8.0	10.0	10.0	10.0	7.3	6.4	5.7	6.1	6.5	5.9	6.3	6.1	7.2	4.5	4.0	3.6	3.6	3.8	4.1	4.2	4.3	5.8	6.5	7.3	7.9	8.0	8.0	8.0	8.3	8.7	10.0	10.0	10.0	10.0	10.0	10.0	10.0	10.0	10.0	10.0	10.0	10.0	8.5	7.9	7.3	5.8	5.8	6.1	6.2	6.1	5.9	5.7	5.6	6.8	6.8	7.0	6.1	6.3	6.4	6.5	6.5	6.5	6.4	6.5	6.8	7.3	7.6	8.8	7.5	7.5	7.6	8.8	8.8	10.0	8.8	8.7	8.7	8.7	10.0	10.0	10.0	10.0	10.0	10.0	10.0	10.0	8.3	7.5	7.3	6.8	6.4	6.3	6.4	6.7	6.9	7.2	7.3	7.4	7.3	7.3	7.2	6.0	6.1	5.8	6.1	6.5	6.8	8.2	8.2	5.4	5.1	4.7	4.3	3.8	3.6	8.8	10.0	10.0	10.0	10.0	10.0	10.0	10.0	10.0	10.0	10.0

Day average: 8.7/10

Best window: 19:00-22:00 · Avg 10.0

What this shows

The selected day from 06:00 to 21:00, scored from 0-10. The top line gives the day average and strongest window; the bars show how conditions rise and fall through that activity window. WeatherDuck score — Wind up to 5 mph (matters a lot) · Rain none at all (matters a fair bit) · Sky At least Mostly cloudy (matters a fair bit).

Score Customiser

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These factors shape your score — set a comfy range for each, and how much it matters. Add more from the tray, or remove ones you don't care about. The bars update instantly.

Wind

Comfy range up to 5 mph

How much it matters

matters a lot

Rain

Comfy range none at all

How much it matters

matters a fair bit

Sky

Comfy range At least Mostly cloudy

How much it matters

matters a fair bit

Temperature

Comfy range 0 – 25°C

How much it matters

matters a fair bit

Time of day

Comfy range any time of day

How much it matters

matters a fair bit

Comfy range any UV level

How much it matters

matters a fair bit

Wind direction

Comfy range any direction

How much it matters

matters a fair bit

Visibility

Comfy range at least 5 km

How much it matters

matters a fair bit

Not counted — tap to add

Overcast

20° / 13° · Today · Tue 22

Dry through the day with little or no measurable rain. East-northeasterly winds averaging around 4 mph with peaks near 6 mph, gusting to 13 mph. Temperatures range from 13C to 20C with largely cloudy skies.

0.0 mm

Rain total

6 mph ENE

Wind max

gusts 13 mph

2.6

UV max

peak 14:00

Low

Pollen

Mugwort

Air quality

Fair

Very low

Thunder

CAPE 40

Atmosphere

Cloud avg 71%

Freezing level 4,040 mup to 4,640 m

Fog risk Low

Sun & Moon

07:02 / 19:14

Sun ↑↓

12 h 12 m

Daylight

17:42 / 01:49

Moon ↑↓

Waxing Gibbous

Moon phase

79% lit

Live rain radar

LIVE

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Light Moderate Heavy

Radar data by RainViewer

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Ground conditions

Is it muddy out there?

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0 mm

Last 24 h

13.4 mm

Last 7 days

Measured at Dousland rain gauge, 2.6 km away

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Layer	Item	Material	Why
Base	Lightweight wicking tee	Synthetic or light merino; avoid cotton (sweat trap)	20°C, so active hiking will be warm
Mid	Light fleece (in pack)	Micro-fleece or thin softshell for summits/breaks	Cooler at altitude, useful on stops
Outer	Waterproof (in pack)	Lightweight packable shell because UK weather changes fast	Always carry because conditions shift quickly
Lower	Walking trousers or shorts	Quick-dry, stretch; not jeans (heavy when wet)	Warm and dry, freedom of movement
Feet	Trail shoes or light boots	Good grip and breathable for dry ground	Dry paths, lighter footwear OK
Extras	Sunglasses, light buff	UV 2.6, so apply suncream in direct sun	Some sunny spells forecast

Start light. Keep 2 layers in your pack.

Wear from the start 3 pieces

Keep in your pack 2 layers

Add before you go Weather protection

Tap an item to see why

Essential Recommended Guidance

Guidance based on the forecast, not professional safety advice. Always use your own judgement. BMC layering guide →

Inversion Outlook Dartmoor, Exmoor & Cornwall region

Unlikely

Tuesday morning BEST

No clear window yet.

Stable for 6h

TUE MORNING

No clear window

Unlikely

Stable for 6h

TUE AFTERNOON

No clear window

Unlikely

WED MORNING

No clear window

Unlikely

Tap a period for detail

Key Factors

Temperature lid

Valley moisture

89%

Layer contrast

Summit clarity

Wind speed

95%

Duration

No temperature inversion detected

Valley air moist enough

No moisture contrast, diffuse profile

Saturated above, no clear cap

Light winds preserve the layer

No sustained favourable window

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Princetown Very likely

A Very likely inversion is about 28 km from your chosen location — tomorrow, best window 6–9am.

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Email alerts sent up to 24h ahead.

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Cloud Inversion Heatmap

Atmospheric Profile · Princetown · 223 m

Region Anchor

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Surface Pressure

Humidity at Pressure Levels

Higher humidity means the air is closer to saturation.

Temperature at Pressure Levels

Warmer air above cooler air can indicate an inversion.

All heights shown equally.

Golden Hour

Today

DARKNESS

DAYLIGHT

06:17

06:42

07:02 Sunrise

07:22

07:47

Golden Hour · 40 min

Be at your summit by 06:42

Allow time to set up before the light show begins.

Monthly Inversion Chance

Illustrative relative chance by season

Illustrative — typical UK pattern

~2 proper inversion days per year. Mostly late autumn to spring.

Cloud inversions explained

What is a cloud inversion near Princetown, Devon?

A cloud inversion happens when cool, moist air becomes trapped in valleys beneath warmer air above. If the trapped moisture turns into fog or low cloud, the hills can rise through it into clearer air and sunshine. From a summit, the result can look like a wide sea of cloud with only the higher peaks visible.

The best chance near Princetown, Devon is a calm, settled night with moist valley air, a warm lid above and clearer, drier air over the tops. The bands on this page, from Unlikely to Very likely, describe the strength of that overall signal rather than a percentage promise, so always check timing, estimated cloud height and wind before setting off.

How to read this page. The headline outlook covers the surrounding region. Key Factors and the Atmospheric Profile describe the nearest available atmospheric profile.

Read the full UK cloud inversion guide See how WeatherDuck forecasts inversions

Common questions

When are cloud inversions most likely near Princetown?

Late October to early March, most often in the hours around dawn. They need a long, calm, clear night so cold air can pool in the valleys, which is why they are rare in summer.

How high do you need to climb to get above the cloud?

It depends on the cloud top, which most often sits between 200m and 800m. This page estimates the cloud top for each night, so check it against the height of the summit you have in mind.

How far ahead can a cloud inversion be forecast?

The signal usually firms up inside 48 hours. Beyond that the outlook tells you whether the pattern looks favourable rather than giving a firm call.

Does a Likely band mean an inversion is guaranteed?

No. The bands describe how strongly the ingredients line up, not a percentage chance, so always check the timing, estimated cloud height and wind before setting off.

Tonight's Stargazing

Fair conditions Mixed conditions — pick your moments.

Moon Waxing Gibbous 86%

Cloud Cover Mostly clear 40%

Moon Times Set 01:49 · Rise 17:42

Sky Clarity 16 km Clear

Lunar Day Day 11.1

Light Pollution View map ↓

Tonight's Aurora

Aurora & Solar Wind NOAA

3.0 Planetary Kp Very Low

Wind Speed 327 km/s

Bz -2.0 nT

Density 1.9 p/cm³

Bt 4.2 nT

No significant aurora activity expected tonight.

Nightly Outlook

Tonight · 22 Sep

Waxing Gibbous · 86% illuminated

39/100

Best window 02:44–04:44 Lower cloud and a low or hidden moon.

Moon height above horizon DaylightGreen = best stargazing hours

18:00–10:00 next morning

Moonset 03:04 Sunset 19:14Sunrise 07:03

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	71%	Above horizon
19:00	54%	Above horizon
20:00	21%	Above horizon
21:00	15%	Above horizon
22:00	27%	Above horizon
23:00	8%	Above horizon
00:00	7%	Above horizon
01:00	38%	Above horizon
02:00	60%	Above horizon
03:00	25%	Below horizon
04:00	20%	Below horizon
05:00	72%	Below horizon
06:00	97%	Below horizon
07:00	100%	Below horizon
08:00	98%	Below horizon
09:00	93%	Below horizon

Highest moon 22° at 22:20 Lunar day 11.1

Wed · 23 Sep

Waxing Gibbous · 92% illuminated

34/100

No good window tonight bright moon up most of the night

Moon height above horizon Daylight

18:00–10:00 next morning

Moonset 04:19 Sunset 19:12Sunrise 07:05

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	41%	Below horizon
19:00	80%	Above horizon
20:00	80%	Above horizon
21:00	20%	Above horizon
22:00	0%	Above horizon
23:00	0%	Above horizon
00:00	0%	Above horizon
01:00	10%	Above horizon
02:00	42%	Above horizon
03:00	65%	Above horizon
04:00	88%	Above horizon
05:00	96%	Below horizon
06:00	88%	Below horizon
07:00	81%	Below horizon
08:00	86%	Below horizon
09:00	90%	Below horizon

Highest moon 27° at 23:00 Lunar day 12.1

Thu · 24 Sep

Waxing Gibbous · 97% illuminated

61/100

Best window 04:40–05:40 Lower cloud and a low or hidden moon.

Moon height above horizon DaylightGreen = best stargazing hours

18:00–10:00 next morning

Moonrise 18:13 Moonset 05:34 Sunset 19:10Sunrise 07:06

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	13%	Below horizon
19:00	4%	Above horizon
20:00	0%	Above horizon
21:00	0%	Above horizon
22:00	0%	Above horizon
23:00	0%	Above horizon
00:00	0%	Above horizon
01:00	0%	Above horizon
02:00	0%	Above horizon
03:00	0%	Above horizon
04:00	0%	Above horizon
05:00	0%	Above horizon
06:00	0%	Below horizon
07:00	0%	Below horizon
08:00	0%	Below horizon
09:00	0%	Below horizon

Highest moon 33° at 00:00 Lunar day 13.1

Fri · 25 Sep

Full Moon · 100% illuminated

5/100

No good window tonight 90% cloud cover all night

Moon height above horizon Daylight

18:00–10:00 next morning

Moonrise 18:26 Moonset 06:52 Sunset 19:07Sunrise 07:08

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	99%	Below horizon
19:00	99%	Above horizon
20:00	99%	Above horizon
21:00	100%	Above horizon
22:00	98%	Above horizon
23:00	91%	Above horizon
00:00	81%	Above horizon
01:00	75%	Above horizon
02:00	78%	Above horizon
03:00	86%	Above horizon
04:00	93%	Above horizon
05:00	97%	Above horizon
06:00	99%	Above horizon
07:00	100%	Below horizon
08:00	100%	Below horizon
09:00	100%	Below horizon

Highest moon 39° at 00:40 Lunar day 14.1

Sat · 26 Sep

Full Moon · 100% illuminated

56/100

No good window tonight bright moon up most of the night

Moon height above horizon Daylight

18:00–10:00 next morning

Moonrise 18:39 Moonset 08:12 Sunset 19:05Sunrise 07:09

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	97%	Below horizon
19:00	88%	Above horizon
20:00	62%	Above horizon
21:00	29%	Above horizon
22:00	5%	Above horizon
23:00	0%	Above horizon
00:00	0%	Above horizon
01:00	0%	Above horizon
02:00	0%	Above horizon
03:00	0%	Above horizon
04:00	0%	Above horizon
05:00	0%	Above horizon
06:00	0%	Above horizon
07:00	1%	Above horizon
08:00	4%	Above horizon
09:00	7%	Below horizon

Highest moon 46° at 01:20 Lunar day 15.1

Sun · 27 Sep

Waning Gibbous · 98% illuminated

13/100

No good window tonight 83% cloud cover all night

Moon height above horizon Daylight

18:00–10:00 next morning

Moonrise 18:53 Moonset 09:35 Sunset 19:03Sunrise 07:11

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	1%	Below horizon
19:00	2%	Above horizon
20:00	11%	Above horizon
21:00	27%	Above horizon
22:00	47%	Above horizon
23:00	68%	Above horizon
00:00	86%	Above horizon
01:00	97%	Above horizon
02:00	100%	Above horizon
03:00	100%	Above horizon
04:00	100%	Above horizon
05:00	100%	Above horizon
06:00	100%	Above horizon
07:00	100%	Above horizon
08:00	100%	Above horizon
09:00	100%	Above horizon

Highest moon 52° at 02:00 Lunar day 16.1

Mon · 28 Sep

Waning Gibbous · 94% illuminated

0/100

No good window tonight bright moon up most of the night

Moon height above horizon Daylight

18:00–10:00 next morning

Moonrise 19:10 Sunset 19:01Sunrise 05:01

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	50%	Below horizon
19:00	50%	Below horizon
20:00	50%	Above horizon
21:00	50%	Above horizon
22:00	50%	Above horizon
23:00	50%	Above horizon
00:00	50%	Above horizon
01:00	—	Above horizon
02:00	—	Above horizon
03:00	—	Above horizon
04:00	—	Above horizon
05:00	—	Above horizon
06:00	—	Above horizon
07:00	—	Above horizon
08:00	—	Above horizon
09:00	—	Above horizon

Highest moon 58° at 03:00 Lunar day 17.1

Aurora Kp · 3-Day Forecast

NOAA SWPC · 3-hourly

Higher Kp = stronger geomagnetic activity = better aurora chances. For UK observers, Kp 4+ means aurora is possible from N. Scotland; Kp 5+ brings it across the whole UK.

Today

Tue 22 Sep

Quiet

Peak Kp 2.0 at 00:00 UTC

No aurora expected — geomagnetic field calm.

9630

2.0 · 00:00

0003060912151821

Tomorrow

Wed 23 Sep

Unsettled

Peak Kp 4.3 at 21:00 UTC

Faint aurora possible from N. Scotland.

9630

4.3 · 21:00

0003060912151821

Thu 24

Thu 24 Sep

Active

Peak Kp 5.3 at 03:00 UTC

Aurora visible across UK — best chance around 03:00 UTC.

9630

5.3 · 03:00

0003060912151821

Aurora Forecast Map

Global — OVATION Model

UK Focus

Your Night Sky

Meteor Showers

Coming up this year

Orionids Oct 21

Oct 2 – Nov 7

Fast, with persistent trains.

Leonids Nov 17

Nov 6 – Nov 30

Occasional storms. Fast, bright.

Geminids Dec 14

Dec 4 – Dec 20

Best of the year. Bright, multi-coloured.

Earlier this year

Quadrantids Jan 4

Jan 1 – Jan 6

Strong, short-lived peak. Bright fireballs.

Lyrids Apr 22

Apr 16 – Apr 25

Sparse, sometimes glowing trails.

Eta Aquariids May 6

Apr 19 – May 28

Best before dawn. Fast meteors.

Delta Aquariids Jul 30

Jul 12 – Aug 23

Steady rates, faint. Best late night.

Perseids Aug 12

Jul 17 – Aug 24

Bright, reliable. Best summer shower.

Light Pollution Map

Understanding the stargazing score

The stargazing score combines cloud cover and moon illumination to estimate how good conditions are for observing the night sky. Cloud cover is the dominant factor — even the darkest location is useless under heavy cloud.

The Bortle scale measures light pollution from 1 (pristine dark sky) to 9 (inner-city sky). In the UK, the best accessible sites reach Bortle 2 to 3, found in areas like Northumberland International Dark Sky Park, parts of the Lake District, Snowdonia, the Brecon Beacons, and the Scottish Highlands. At Bortle 3, the Milky Way is clearly visible and dozens of deep-sky objects are observable with binoculars.

Moon phase matters: A new moon (0% illumination) provides the darkest sky. A full moon floods the sky with light, washing out everything except planets and the brightest stars. The best stargazing combines a new or thin crescent moon with clear skies.

Practical tips: Give your eyes 20 to 30 minutes to dark-adapt after arriving at your spot. Avoid looking at phone screens (use a red-light torch instead). The hours after midnight are often best, as the atmosphere settles and any remaining cloud may clear.

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Princetown, Devon

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Cloud inversions explained

What is a cloud inversion near Princetown, Devon?

Nightly Outlook

Tonight · 22 Sep

Wed · 23 Sep

Thu · 24 Sep

Fri · 25 Sep

Sat · 26 Sep

Sun · 27 Sep

Mon · 28 Sep

Aurora Kp · 3-Day Forecast

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Dry paths or muddy boots?

Your local ground report

Rainfall & rain gauges Nearby observations

Rainfall over the last 7 days

Nearby rain gauges

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Popular locations in this area