Active location

Abergavenny, Monmouthshire

51.82°N, 3.02°W · ~61m · 06:54 – 19:15

Updated 16:27

Temp

19°C

↓ 0.4 / 1hr

Wind

7.4

↑ 0.2 / 1hr

Condition

Sunny

Score

7.7

Good


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

Sun 20 Sep								Mon 21 Sep																								Tue 22 Sep																								Wed 23 Sep																								Thu 24 Sep																								Fri 25 Sep																								Sat 26 Sep																								Sun 27 Sep
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

-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.2	0.2	0.2	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.3	0.3	0.3	-	-	-	-	-	-	-	-	-	-	-	-	0.1	0.1	0.1	0.1	0.1	0.1	-	-	-	-	-	-	-	-	-	-	-
0%	0%	0%	0%	0%	0%	0%	0%	0%	0%	5%	5%	0%	0%	0%	0%	5%	0%	0%	0%	5%	10%	5%	10%	15%	15%	15%	25%	20%	15%	15%	10%	20%	30%	25%	20%	25%	25%	25%	25%	20%	15%	15%	15%	15%	20%	10%	15%	15%	20%	15%	20%	25%	15%	15%	15%	25%	25%	25%	25%	25%	25%	25%	25%	25%	25%	25%	10%	10%	15%	60%	50%	50%	5%	0%	0%	0%	0%	0%	0%	15%	15%	20%	25%	30%	30%	30%	30%	25%	15%	15%	15%	10%	10%	15%	15%	15%	15%	10%	10%	15%	20%	25%	30%	35%	35%	35%	35%	35%	30%	30%	20%	15%	5%	0%	0%	0%	0%	5%	15%	35%	70%	70%	75%	30%	30%	30%	25%	25%	25%	25%	25%	30%	35%	35%	35%	85%	85%	85%	85%	85%	85%	35%	35%	35%	35%	35%	35%	35%	35%	35%	35%	35%

19°	18°	17°	16°	14°	13°	13°	12°	12°	12°	12°	11°	12°	11°	11°	12°	13°	14°	16°	17°	19°	20°	20°	21°	21°	20°	20°	19°	19°	18°	18°	17°	17°	17°	16°	16°	16°	16°	16°	16°	16°	17°	18°	19°	19°	19°	20°	20°	19°	18°	18°	17°	16°	14°	12°	11°	11°	10°	10°	10°	10°	10°	10°	11°	12°	13°	15°	17°	19°	20°	19°	18°	17°	16°	15°	14°	13°	12°	11°	11°	10°	10°	9°	8°	7°	5°	4°	4°	6°	9°	12°	13°	14°	15°	16°	17°	17°	17°	16°	15°	15°	14°	14°	14°	14°	14°	14°	14°	14°	14°	13°	13°	14°	15°	17°	18°	19°	20°	19°	19°	18°	16°	15°	13°	12°	12°	11°	11°	10°	10°	10°	10°	10°	10°	10°	10°	10°	11°	11°	11°	12°	12°	12°	13°	13°	13°	13°	13°	13°	12°	12°	11°	11°
16°	16°	15°	14°	13°	12°	12°	11°	11°	11°	11°	10°	11°	10°	10°	10°	12°	13°	15°	16°	18°	19°	21°	22°	21°	21°	21°	20°	20°	19°	18°	17°	17°	18°	17°	17°	16°	16°	16°	16°	17°	18°	19°	19°	20°	20°	20°	21°	21°	20°	19°	18°	18°	14°	12°	11°	10°	10°	10°	10°	10°	10°	10°	10°	12°	14°	16°	17°	18°	18°	17°	16°	15°	14°	13°	12°	11°	10°	9°	8°	8°	7°	7°	6°	5°	4°	2°	2°	4°	8°	11°	12°	12°	13°	14°	15°	15°	15°	14°	13°	13°	13°	12°	12°	12°	12°	13°	13°	13°	13°	12°	12°	13°	15°	16°	17°	18°	19°	18°	17°	16°	15°	13°	12°	11°	10°	10°	9°	9°	8°	8°	8°	8°	8°	8°	9°	9°	9°	10°	11°	11°	12°	12°	12°	13°	13°	13°	13°	13°	13°	12°	11°	11°

WNW	WNW	W	WNW	NW	WNW	NW	WNW	WNW	NW	NE	NW	WNW	W	NW	WNW	W	W	W	W	W	W	W	WSW	SE	SE	SE	ENE	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	W	S	SE	SE	SSE	SE	SE	E	E	SE	SSE	SSW	WSW	WNW	W	W	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	SW	SW	WSW	WSW	W	WNW	NW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NNW	NW	NW	NW	NW	NW	W	SW	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SW	SW	SW	SW	WSW	W	WNW	NW	NNW	NNE	NNE	NNE	NNE	N	N	NNW	N	N	N	N	N	N	N	N	NNE	NNE	NNE	NNE	NNE	NNE	NNE	NNE	NNE	NNE	N	NNW	NW	WNW	W
7	8	6	5	5	4	2	3	4	3	1	1	3	3	3	4	2	3	4	6	6	5	4	2	4	5	4	2	3	5	6	6	5	3	4	5	5	6	5	4	2	2	1	3	3	4	4	2	1	1	2	3	2	2	1	1	2	2	2	1	1	1	2	2	3	3	4	6	9	12	13	13	13	11	10	9	8	8	7	7	7	6	5	4	2	2	1	1	1	2	4	6	8	10	11	11	11	11	10	9	9	9	9	10	10	10	9	8	7	6	6	5	6	7	9	9	10	11	11	11	11	11	10	9	8	7	6	7	7	6	6	6	6	6	5	5	5	5	4	4	4	4	3	3	2	2	2	1	1	1	1	1	1
16	16	13	13	12	9	5	7	8	6	3	3	6	6	6	8	5	6	9	11	12	12	10	6	9	11	8	5	6	11	13	12	10	7	9	11	10	12	10	9	5	5	4	7	8	9	9	6	5	4	4	4	3	2	1	1	2	2	2	2	2	3	3	4	5	5	7	12	18	22	24	24	23	21	18	16	14	14	13	12	11	10	8	6	4	2	2	2	3	5	8	12	16	19	21	21	21	19	17	15	15	15	16	17	17	17	16	14	12	11	9	9	10	13	16	17	19	20	20	20	20	19	18	16	15	13	11	13	12	11	11	11	10	10	9	9	9	9	9	9	8	8	7	6	5	4	3	2	2	1	1	1	1

49	49	53	61	65	69	76	75	74	75	79	83	74	77	79	78	73	67	64	63	66	67	67	66	67	70	75	81	80	83	84	87	87	88	90	92	93	94	93	92	89	87	82	78	75	78	75	74	74	79	84	88	91	92	94	96	99	100	100	99	99	99	100	100	100	99	96	87	75	67	67	72	75	75	73	73	76	81	84	84	84	84	87	92	95	97	97	96	92	86	81	77	74	71	68	66	66	68	71	75	80	85	89	92	94	96	96	96	96	97	98	97	93	87	82	78	74	72	74	77	81	85	89	92	93	93	93	93	92	92	92	91	91	90	90	90	90	91	91	92	93	93	93	94	94	94	95	95	96	96	97	98	99
1021	1021	1022	1022	1023	1024	1024	1025	1025	1025	1025	1025	1024	1024	1024	1025	1026	1026	1026	1025	1025	1025	1025	1024	1024	1024	1023	1024	1024	1024	1024	1024	1024	1024	1023	1023	1023	1023	1023	1023	1023	1023	1024	1023	1023	1023	1022	1022	1021	1021	1021	1021	1020	1020	1020	1019	1019	1019	1018	1018	1017	1017	1017	1016	1016	1016	1016	1016	1016	1016	1016	1016	1017	1017	1018	1019	1019	1020	1020	1020	1020	1020	1020	1020	1020	1020	1020	1020	1020	1020	1020	1020	1020	1019	1018	1018	1017	1017	1016	1016	1015	1015	1015	1014	1014	1013	1013	1013	1012	1012	1012	1012	1012	1012	1012	1012	1012	1012	1012	1012	1013	1013	1014	1014	1015	1015	1015	1015	1015	1015	1015	1015	1015	1014	1014	1014	1014	1014	1013	1013	1013	1013	1012	1012	1011	1011	1010	1010	1010	1009	1009	1009	1009
35.5	36.7	36.2	31.6	30.2	30.7	28.8	27.8	28.3	31.5	29.3	26.5	28.5	26.1	24.6	23	23.3	26.4	28.7	30.6	28.2	26.3	25.9	25.3	22	15.1	10.9	9.9	15.1	17.2	20	18.8	18.6	17.9	16.3	14.7	12.9	12.1	12.4	13.7	16.5	15.9	19.2	21.3	22.6	21.3	20.7	19.5	18.7	18.4	19.5	20.7	19.8	18.4	16.9	13.3	9.7	6	5.8	5.5	5.3	3.5	1.8	0.1	5	9.9	14.9	16.7	18.5	20.3	21.4	22.4	23.5	23.8	24.1	24.3	23.8	23.4	22.9	22.9	23	23.1	20.9	18.8	16.6	15.9	15.3	14.6	17.7	20.8	23.9	24.3	24.8	25.3	25.1	25	24.8	24.5	24.2	23.9	22.6	21.3	20	18.2	16.4	14.6	12.4	10.2	8	9.5	11	12.5	15.6	18.8	22	22.4	22.7	23.1	19.7	16.2	12.8	11	9.3	7.5	11	14.5	18	18.2	18.5	18.8	17.9	17.1	16.2	15.4	14.5	13.7	12.7	11.7	10.7	9.6	8.6	7.6	9.1	10.6	12	13.5	15	16.4	15.4	14.3	13.2	12.1	11
1.3	0.5	0.2	-	-	-	-	-	-	-	-	-	-	-	-	-	0.2	0.4	1.1	2	2.4	2.6	2.2	1.4	0.7	0.2	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.1	0.4	0.9	1.5	1.3	2.1	2.3	1.2	0.7	1.2	0.6	0.1	-	-	-	-	-	-	-	-	-	-	-	-	0.5	1	1.5	2.3	3.1	3.6	3.7	3.4	2.8	1.9	1	0.1	-	-	-	-	-	-	-	-	-	-	-	-	0.5	1.1	1.6	2	2.3	2.4	2.2	1.9	1.5	1.1	0.5	-	-	-	-	-	-	-	-	-	-	-	-	-	0.8	1.7	2.6	3.3	3.8	3.9	3.4	2.3	1.4	1	0.5	-	-	-	-	-	-	-	-	-	-	-	-	-	0.4	0.9	1.3	1.7	1.9	2	1.9	1.7	1.4	0.9	0.4	-	-	-	-	-	-
40	20	10	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	10	10	10	20	10	10	10	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	10	10	20	20	20	35	20	23	20	10	10	20	10	0	0	0	0	0	0	0	0	0	0	0	0	10	120	260	340	280	160	60	20	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	0	10	20	30	40	30	20	10	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
7.2	7.1	7.7	7.9	8.0	8.5	10.0	10.0	8.7	10.0	10.0	10.0	10.0	10.0	10.0	8.7	10.0	10.0	8.5	8.0	7.9	8.0	8.3	10.0	7.3	6.9	7.5	8.8	8.8	8.1	7.7	7.9	7.1	8.8	8.5	8.2	8.2	8.0	8.3	8.5	10.0	10.0	10.0	8.8	7.5	7.3	8.6	8.8	8.8	8.8	10.0	10.0	10.0	10.0	10.0	10.0	10.0	10.0	8.8	8.8	8.8	8.8	8.8	8.8	8.8	8.8	7.6	7.9	6.6	5.7	5.2	5.1	5.3	5.8	6.4	7.0	7.2	7.4	7.5	7.6	7.8	6.8	7.2	8.8	8.8	8.8	8.8	8.8	8.8	8.8	7.5	6.8	5.8	5.1	4.8	4.6	4.7	5.0	5.5	5.8	5.8	5.7	5.6	5.5	5.3	5.3	5.6	6.0	7.6	8.0	8.3	8.3	8.0	7.5	7.0	6.6	6.4	6.2	6.0	6.0	4.9	4.9	5.1	5.4	6.0	6.4	6.6	6.3	7.7	7.8	7.9	8.0	6.9	7.0	7.0	7.1	7.1	7.2	7.2	7.3	7.4	7.5	8.8	8.8	8.8	8.8	8.8	8.8	8.8	8.8	8.8	8.8	10.0

Day average: 7.7/10

Best window: 19:00-22:00 · Avg 8.1

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).

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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

19° / 12° · Today · Sun 20

Dry through the day with little or no measurable rain. West-northwesterly winds averaging around 7 mph with peaks near 10 mph, gusting to 20 mph. Temperatures range from 12C to 19C, turning cooler later with a mix of sun and cloud. Watch for moderate uv in brighter breaks.

0.0 mm

Rain total

10 mph WNW

Wind max

gusts 20 mph

3.3

UV max

peak 13:00

Low

Pollen

Air quality

Fair

Very low

Thunder

CAPE 50

Atmosphere

Cloud avg 53%

Freezing level 3,440 mup to 4,090 m

Fog risk Low

Sun & Moon

06:54 / 19:15

Sun ↑↓

12 h 20 m

Daylight

16:56 / 00:25

Moon ↑↓

Waxing Gibbous

Moon phase

65% 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

9.4 mm

Last 7 days

Measured at Cwmafon raingauge rain gauge, 7.9 km away

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Layer	Item	Material	Why
Base	Lightweight wicking tee	Synthetic or light merino; avoid cotton (sweat trap)	19°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	Hat, gloves, gaiters	Pack spare mid-layer, buff/neck gaiter	Cool on ridges, so extra warmth will be useful

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 Bannau Brycheiniog & South Wales Valleys region

Unlikely

Sunday afternoon BEST

No clear window yet.

SUN AFTERNOON

No clear window

Unlikely

MON MORNING

No clear window

Unlikely

MON AFTERNOON

No clear window

Unlikely

Tap a period for detail

Key Factors

Temperature lid

Valley moisture

10%

Layer contrast

Summit clarity

Wind speed

87%

Duration

No temperature inversion detected

Marginal moisture below

No moisture contrast, diffuse profile

Saturated above, no clear cap

Light winds preserve the layer

No sustained favourable window

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Example email alert

Abergavenny 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 · Abergavenny · 61 m

Region Anchor

Loading… Timeline

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

06:09

06:34

06:54 Sunrise

07:14

07:39

Golden Hour · 40 min

Be at your summit by 06:34

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 Abergavenny, Monmouthshire?

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 Abergavenny, Monmouthshire 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 Abergavenny?

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

Good conditions Mostly clear, but a bright moon will wash out faint stars.

Moon Waxing Gibbous 68%

Cloud Cover Clear 18%

Moon Times Rise 16:56 · Set 00:25

Sky Clarity 28 km Clear

Lunar Day Day 9.1

Light Pollution View map ↓

Tonight's Aurora

Aurora & Solar Wind NOAA

1.7 Planetary Kp Very Low

Wind Speed 407 km/s

Bz 2.4 nT

Density 1.7 p/cm³

Bt 5.1 nT

No significant aurora activity expected tonight.

Nightly Outlook

Tonight · 20 Sep

Waxing Gibbous · 68% illuminated

60/100

Best window 22:45–05:45 Lower cloud and a low or hidden moon.

Moon height above horizon DaylightGreen = best stargazing hours

18:00–10:00 next morning

Moonset 00:25 Sunset 19:15Sunrise 06:56

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	0%	Above horizon
19:00	0%	Above horizon
20:00	0%	Above horizon
21:00	12%	Above horizon
22:00	41%	Above horizon
23:00	29%	Above horizon
00:00	6%	Above horizon
01:00	8%	Below horizon
02:00	30%	Below horizon
03:00	33%	Below horizon
04:00	29%	Below horizon
05:00	8%	Below horizon
06:00	0%	Below horizon
07:00	11%	Below horizon
08:00	49%	Below horizon
09:00	67%	Below horizon

Highest moon 13° at 20:40 Lunar day 9.1

Mon · 21 Sep

Waxing Gibbous · 77% illuminated

17/100

No good window tonight conditions don't line up tonight

Moon height above horizon Daylight

18:00–10:00 next morning

Moonset 01:38 Sunset 19:13Sunrise 06:58

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	96%	Above horizon
19:00	94%	Above horizon
20:00	85%	Above horizon
21:00	71%	Above horizon
22:00	67%	Above horizon
23:00	67%	Above horizon
00:00	83%	Above horizon
01:00	90%	Above horizon
02:00	83%	Below horizon
03:00	80%	Below horizon
04:00	74%	Below horizon
05:00	70%	Below horizon
06:00	74%	Below horizon
07:00	76%	Below horizon
08:00	76%	Below horizon
09:00	77%	Below horizon

Highest moon 16° at 21:40 Lunar day 10.1

Tue · 22 Sep

Waxing Gibbous · 86% illuminated

23/100

No good window tonight bright moon up most of the night

Moon height above horizon Daylight

18:00–10:00 next morning

Moonset 02:55 Sunset 19:10Sunrise 06:59

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	82%	Above horizon
19:00	77%	Above horizon
20:00	61%	Above horizon
21:00	28%	Above horizon
22:00	8%	Above horizon
23:00	20%	Above horizon
00:00	50%	Above horizon
01:00	77%	Above horizon
02:00	91%	Above horizon
03:00	97%	Below horizon
04:00	99%	Below horizon
05:00	100%	Below horizon
06:00	100%	Below horizon
07:00	100%	Below horizon
08:00	100%	Below horizon
09:00	100%	Below horizon

Highest moon 20° at 22:20 Lunar day 11.1

Wed · 23 Sep

Waxing Gibbous · 92% illuminated

22/100

No good window tonight bright moon up most of the night

Moon height above horizon Daylight

18:00–10:00 next morning

Moonset 04:12 Sunset 19:08Sunrise 07:01

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	5%	Below horizon
19:00	3%	Above horizon
20:00	0%	Above horizon
21:00	0%	Above horizon
22:00	6%	Above horizon
23:00	31%	Above horizon
00:00	68%	Above horizon
01:00	94%	Above horizon
02:00	100%	Above horizon
03:00	100%	Above horizon
04:00	99%	Above horizon
05:00	96%	Below horizon
06:00	92%	Below horizon
07:00	90%	Below horizon
08:00	91%	Below horizon
09:00	93%	Below horizon

Highest moon 26° at 23:00 Lunar day 12.1

Thu · 24 Sep

Waxing Gibbous · 97% illuminated

11/100

No good window tonight 91% cloud cover all night

Moon height above horizon Daylight

18:00–10:00 next morning

Moonrise 18:11 Moonset 05:29 Sunset 19:06Sunrise 07:02

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	96%	Below horizon
19:00	95%	Above horizon
20:00	96%	Above horizon
21:00	97%	Above horizon
22:00	98%	Above horizon
23:00	99%	Above horizon
00:00	99%	Above horizon
01:00	98%	Above horizon
02:00	96%	Above horizon
03:00	91%	Above horizon
04:00	81%	Above horizon
05:00	61%	Above horizon
06:00	37%	Below horizon
07:00	20%	Below horizon
08:00	14%	Below horizon
09:00	15%	Below horizon

Highest moon 31° at 23:40 Lunar day 13.1

Fri · 25 Sep

Full Moon · 100% illuminated

6/100

No good window tonight 89% cloud cover all night

Moon height above horizon Daylight

18:00–10:00 next morning

Moonrise 18:22 Moonset 06:48 Sunset 19:03Sunrise 07:04

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	99%	Below horizon
19:00	98%	Above horizon
20:00	98%	Above horizon
21:00	100%	Above horizon
22:00	97%	Above horizon
23:00	87%	Above horizon
00:00	81%	Above horizon
01:00	79%	Above horizon
02:00	80%	Above horizon
03:00	83%	Above horizon
04:00	88%	Above horizon
05:00	93%	Above horizon
06:00	97%	Above horizon
07:00	99%	Below horizon
08:00	100%	Below horizon
09:00	100%	Below horizon

Highest moon 38° at 00:40 Lunar day 14.1

Sat · 26 Sep

Full Moon · 100% illuminated

0/100

No good window tonight 87% cloud cover all night

Moon height above horizon Daylight

18:00–10:00 next morning

Moonrise 18:34 Sunset 19:01Sunrise 05:01

Every hour in detail

Hours after midnight are the following morning.
Hour	Cloud cover	Moon
18:00	100%	Below horizon
19:00	99%	Above horizon
20:00	97%	Above horizon
21:00	93%	Above horizon
22:00	89%	Above horizon
23:00	84%	Above horizon
00:00	82%	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	—	Below horizon

Highest moon 44° at 01:20 Lunar day 15.1

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

Sun 20 Sep

Unsettled

Peak Kp 3.0 at 03:00 UTC

Slightly unsettled — minor activity, no aurora expected.

9630

3.0 · 03:00

0003060912151821

Tomorrow

Mon 21 Sep

Quiet

Peak Kp 2.0 at 03:00 UTC

No aurora expected — geomagnetic field calm.

9630

2.0 · 03:00

0003060912151821

Tue 22

Tue 22 Sep

Quiet

Peak Kp 1.7 at 00:00 UTC

No aurora expected — geomagnetic field calm.

9630

1.7 · 00:00

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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Weather data by Open-Meteo.com
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Where are you heading?

Abergavenny, Monmouthshire

Overcast

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Fog and low cloud around at times

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Humidity at Pressure Levels

Temperature at Pressure Levels

Cloud inversions explained

What is a cloud inversion near Abergavenny, Monmouthshire?

Nightly Outlook

Tonight · 20 Sep

Mon · 21 Sep

Tue · 22 Sep

Wed · 23 Sep

Thu · 24 Sep

Fri · 25 Sep

Sat · 26 Sep

Aurora Kp · 3-Day Forecast

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