Active location

Mam Tor, Derbyshire

53.35°N, 1.81°W · ~497m · 06:23 – 19:47

Updated 12:00

Temp

11°C

↑ 1.2 / 1hr

Wind

18.1

→ steady / 1hr

Condition

Overcast

Score

5.4

Fair


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

Sat 5 Sep												Sun 6 Sep																								Mon 7 Sep																								Tue 8 Sep																								Wed 9 Sep																								Thu 10 Sep																								Fri 11 Sep																								Sat 12 Sep
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

-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.2	0.4	0.4	-	-	-	-	-	-	-	-	-	-	-	0.1	0.1	-	-	-	0.3	0.1	0.1	0.1	0.2	-	-	-	-	-	-	-	-	-	-	0.7	0.7	0.7	-	-	-	-	-	-	-	-	-	-	-	-	0.1	0.1	0.1	0.4	0.4	0.4	0.6	0.6	0.6	0.1	0.1	0.1	0.2	0.2	0.2	0.2	0.2	0.2	0.1	0.1	0.1	0.1	0.1	0.1	0.2	0.2	0.2	0.1	0.1	0.1	0.1	0.1	0.1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	0.1	0.1	0.1	-	-	-	-	-	-	0.1	0.1	0.1	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.3	0.3	0.3	0.3	0.3	0.3	-	-	-	-	-
25%	10%	10%	10%	10%	10%	15%	20%	25%	25%	25%	10%	20%	20%	15%	5%	10%	10%	10%	15%	10%	30%	75%	100%	100%	35%	0%	0%	5%	5%	5%	10%	10%	5%	5%	15%	75%	90%	30%	35%	55%	95%	95%	95%	95%	95%	45%	15%	20%	15%	10%	10%	5%	10%	15%	40%	75%	70%	65%	45%	20%	25%	15%	10%	10%	10%	25%	20%	25%	20%	15%	75%	70%	70%	70%	70%	75%	80%	80%	85%	85%	80%	75%	75%	80%	80%	80%	80%	85%	85%	85%	85%	80%	80%	75%	75%	75%	70%	70%	70%	65%	65%	65%	65%	15%	15%	15%	15%	30%	35%	35%	35%	35%	30%	35%	30%	30%	25%	20%	15%	0%	0%	55%	55%	60%	15%	10%	0%	15%	15%	25%	80%	90%	90%	90%	90%	90%	90%	90%	90%	90%	90%	90%	90%	90%	85%	85%	85%	85%	75%	75%	70%	30%	30%	35%	35%	35%

11°	12°	13°	13°	13°	13°	13°	12°	12°	12°	11°	10°	10°	11°	11°	10°	11°	11°	11°	11°	12°	12°	12°	11°	12°	15°	15°	17°	17°	18°	18°	17°	16°	16°	16°	16°	15°	15°	15°	14°	14°	14°	13°	12°	12°	12°	12°	13°	13°	13°	13°	14°	15°	15°	14°	13°	12°	11°	10°	10°	9°	9°	9°	9°	9°	8°	8°	8°	9°	9°	10°	10°	11°	11°	11°	11°	11°	11°	10°	10°	9°	9°	9°	9°	9°	9°	8°	8°	8°	8°	8°	8°	9°	9°	10°	10°	11°	11°	11°	11°	11°	11°	11°	10°	10°	9°	9°	9°	8°	8°	8°	8°	8°	8°	7°	7°	8°	10°	11°	12°	13°	14°	14°	14°	14°	14°	13°	13°	12°	12°	12°	12°	12°	12°	12°	12°	12°	13°	13°	13°	13°	13°	13°	13°	13°	13°	13°	13°	13°	12°	12°	12°	12°	11°	11°	11°	10°
7°	8°	9°	9°	10°	11°	11°	11°	11°	11°	10°	9°	9°	10°	9°	9°	9°	9°	9°	9°	9°	9°	10°	9°	10°	13°	14°	15°	15°	16°	16°	15°	14°	14°	14°	14°	13°	13°	13°	13°	13°	13°	11°	10°	9°	8°	9°	9°	9°	9°	9°	10°	10°	10°	10°	9°	8°	7°	6°	6°	5°	5°	5°	4°	4°	4°	4°	4°	4°	4°	5°	5°	6°	6°	6°	7°	7°	7°	6°	6°	6°	5°	5°	5°	5°	5°	5°	5°	5°	4°	4°	4°	5°	5°	6°	6°	7°	7°	7°	7°	7°	7°	7°	7°	7°	7°	6°	6°	6°	6°	6°	6°	6°	6°	6°	6°	7°	8°	9°	10°	11°	12°	12°	12°	12°	12°	11°	11°	11°	10°	10°	10°	10°	10°	10°	10°	11°	11°	11°	12°	12°	11°	11°	11°	11°	10°	10°	10°	10°	10°	10°	10°	10°	10°	10°	10°	10°
W	W	W	WNW	W	WNW	WNW	WNW	W	WNW	WNW	WSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SW	SW	SSW	SSW	S	S	S	S	SSW	SSW	SSW	SW	SW	SW	SSW	SW	WSW	WSW	WSW	WSW	WSW	WSW	WNW	W	W	W	W	W	WSW	WSW	WSW	WSW	SW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	W	W	W	W	W	W	W	W	W	W	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	W	W	W	W	W	WSW	WSW	SW	SW	WSW	WSW	WSW	WSW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SSW	SSW	S	S	S	S	S	S	S	SSW	SSW	SW	SW	SW	WSW	WSW	WSW	W	W	W	W	WNW	WNW	WNW	WNW	WNW	WNW	WNW	W	W	W	WSW
18	18	16	15	12	10	7	4	3	4	3	2	2	3	4	4	5	5	5	6	9	10	9	8	9	10	12	13	14	13	11	10	10	11	10	12	13	11	12	12	12	14	13	13	15	17	16	16	15	16	17	17	18	18	18	17	17	17	16	16	15	14	15	15	16	15	14	13	15	17	18	18	18	17	17	17	17	16	15	14	14	15	15	15	14	14	13	13	13	13	13	14	14	15	15	15	15	15	15	14	13	12	11	9	8	7	6	6	6	6	6	5	5	4	3	2	3	4	5	6	7	7	8	8	8	8	8	7	7	7	8	9	10	10	11	11	11	11	11	11	12	12	13	13	13	13	13	12	11	10	9	8	7	6	5	4	4
34	34	31	29	23	19	14	9	7	8	6	4	5	6	9	9	10	11	11	13	17	20	18	16	18	20	23	26	27	24	22	19	21	22	20	23	25	21	24	23	23	27	26	25	27	32	30	31	28	30	31	32	33	33	33	32	31	31	30	28	27	26	27	28	29	28	25	25	27	31	34	34	32	32	32	32	31	29	27	26	26	27	27	27	26	25	25	24	23	24	25	26	27	28	29	29	29	29	28	26	24	22	19	17	15	13	11	11	11	11	11	10	9	7	5	4	6	9	11	13	15	16	16	16	16	15	14	13	13	13	14	17	18	19	19	20	20	20	20	21	21	22	23	24	24	24	23	22	20	18	16	15	13	11	9	8	6

86	79	73	72	70	71	73	79	84	84	87	88	91	89	87	88	83	79	82	81	79	82	87	96	96	84	80	73	71	69	73	79	80	74	75	77	84	90	93	97	97	98	100	98	98	95	90	82	80	73	69	65	64	66	71	76	80	85	88	90	92	93	93	92	91	92	93	93	91	89	85	78	71	67	71	80	87	91	94	95	95	94	93	93	94	94	94	95	95	95	96	95	93	90	87	85	84	83	81	78	76	76	78	79	80	81	82	84	87	89	90	89	90	93	96	97	95	92	87	80	73	68	68	70	73	77	81	84	85	86	87	94	96	97	98	98	99	98	98	98	98	97	96	96	95	94	93	92	90	89	88	88	89	91	93	95	97
963	964	964	964	965	965	965	965	965	966	966	965	965	965	965	964	964	963	963	963	963	963	963	962	962	961	961	960	959	959	959	958	958	958	957	957	957	957	956	956	956	956	956	956	956	956	956	956	956	956	955	955	955	954	954	953	953	952	952	952	951	951	950	950	949	949	949	949	949	949	949	949	949	949	949	949	949	949	949	949	949	950	950	951	951	951	952	952	952	952	953	953	953	954	954	955	955	956	956	956	956	956	956	956	956	956	956	956	955	955	955	955	955	955	955	955	955	956	956	957	957	957	957	957	957	957	956	956	956	956	956	955	954	954	954	953	953	953	953	953	953	953	954	954	955	955	956	956	957	957	957	958	958	958	959	959	959
26.7	29.4	32.7	29.2	33	31.2	29.8	26.2	23.7	21.6	19.6	21.4	19.6	22.3	21.1	19.8	23.4	26	23.4	21.6	25.7	23.3	16.5	11.5	14.9	25.2	21.7	22.3	22.4	24.6	25.7	23.7	22.8	25.9	26.9	26	23.8	19.4	19.6	17.6	17	12.4	1.9	10.8	5.5	21.3	21.4	26.2	22.3	20.3	18.1	20.7	23.2	16.9	10.6	4.3	9.3	14.4	19.4	18.8	18.1	17.5	17.8	18.2	18.6	18.3	18	17.7	15.1	12.4	9.8	10.5	11.3	12	10.8	9.7	8.5	8.6	8.6	8.6	9.4	10.1	10.8	11.5	12.3	13	11.4	9.8	8.2	8.2	8.1	8.1	12.5	16.8	21.2	17.5	13.8	10.2	9.2	8.2	7.2	10	12.8	15.5	18	20.5	23.1	21.6	20.2	18.7	19.1	19.5	19.9	17.9	15.9	13.9	16.4	19	21.6	22.9	24.3	25.6	24.2	22.7	21.3	20.2	19	17.9	19.1	20.2	21.4	16.1	10.7	5.4	5.3	5.1	4.9	4.8	4.6	4.5	4.4	4.3	4.3	4.2	4.1	4.1	5.9	7.7	9.5	11.4	13.2	15	14.4	13.9	13.3	12.7	12.1
1.7	2.9	3.2	2.3	1.6	0.7	0.2	-	-	-	-	-	-	-	-	-	-	-	-	-	0.2	0.4	0.5	0.6	2.1	3.7	3.6	2.8	1.5	0.7	0.2	-	-	-	-	-	-	-	-	-	-	-	-	-	0.2	0.7	1	2.6	1.5	2.3	2.6	2.6	2.2	1.5	0.8	0.3	-	-	-	-	-	-	-	-	-	-	-	0.3	1	1.7	2.2	2.4	2.5	2.5	2.6	2.7	2.4	1.7	1	0.3	-	-	-	-	-	-	-	-	-	-	-	0.2	0.9	1.5	2.1	2.6	3	3.2	3	2.5	2	1.5	0.9	0.3	-	-	-	-	-	-	-	-	-	-	-	0.2	0.7	1.3	1.9	2.9	4.1	4.6	4	2.8	1.9	1.6	1.2	0.4	-	-	-	-	-	-	-	-	-	-	-	0.2	0.7	1.2	1.7	2.1	2.4	2.5	2.5	2.3	2	1.5	0.9	0.2	-	-	-	-	-
20	20	30	20	30	20	10	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	10	20	20	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	10	0	20	25	30	25	20	20	20	20	20	20	10	10	0	0	10	10	10	0	0	0	0	0	20	60	80	80	60	60	80	120	130	100	60	20	10	0	0	0	10	20	20	30	30	30	20	20	40	60	80	100	110	120	110	90	70	50	30	20	10	0	0	0	0	0	0	0	0	0	0	0	0	10	20	40	60	70	80	80	80	60	20	0	0	0	0	0	0	0	0	0	0	0	10	10	20	30	40	50	60	60	60	50	40	40	30	20	20	10	10	0	0
1.8	3.0	3.7	4.2	5.6	6.3	6.1	7.2	8.8	7.5	10.0	10.0	10.0	8.8	8.6	8.5	8.3	8.0	8.0	7.7	5.6	5.0	5.2	5.5	5.1	6.1	5.6	4.9	3.5	4.0	4.5	6.4	4.9	4.7	5.1	4.3	3.8	4.7	4.2	4.2	4.3	3.3	3.6	3.9	3.2	2.1	2.8	2.6	3.1	2.8	2.5	2.1	1.9	1.9	2.1	2.2	1.8	2.0	2.2	3.0	3.3	3.5	4.6	4.2	4.1	4.4	4.9	5.0	4.5	3.6	3.0	1.8	2.0	2.3	2.0	2.0	3.3	3.6	4.1	4.4	4.8	4.5	4.4	4.5	4.6	4.8	4.9	5.1	5.2	5.1	5.0	4.8	4.6	4.3	3.0	2.8	4.0	4.1	4.4	3.5	3.9	4.4	4.9	5.4	5.9	6.4	7.9	6.7	6.6	6.6	6.8	7.0	7.2	7.6	8.8	8.8	8.8	7.3	6.9	7.7	7.4	7.2	7.0	7.0	5.8	7.1	7.4	7.5	7.5	7.5	6.2	5.4	5.2	5.0	4.7	4.6	4.6	4.6	4.5	4.4	4.3	4.1	3.9	3.7	3.6	3.7	4.0	4.3	4.7	5.1	5.5	7.0	6.4	6.7	7.1	7.4	8.8

Best Activity Window

WeatherDuck score

Day average: 5.4/10

Best window: 19:00-22:00 · Avg 7.8

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

13° / 10° · Today · Sat 5

Spells of rain most likely in morning. Westerly winds averaging around 13 mph with peaks near 24 mph, gusting to 45 mph. Temperatures range from 10C to 13C with largely cloudy skies. Watch for moderate uv in brighter breaks.

2.5 mm

Rain total

24 mph W

Wind max

gusts 45 mph

3.2

UV max

peak 14:00

Low

Pollen

Grass

Air quality

Fair

Very low

Thunder

CAPE 30

Atmosphere

Cloud avg 88%

Freezing level 3,120 mup to 3,910 m

Fog risk Low

Sun & Moon

06:23 / 19:47

Sun ↑↓

13 h 23 m

Daylight

23:22 / 17:21

Moon ↑↓

Last Quarter

Moon phase

40% lit

Overcast

18° / 10° · Tomorrow · Sun 6

Light showers most likely in morning and midday. South-southwesterly winds averaging around 9 mph with peaks near 14 mph, gusting to 27 mph. Temperatures range from 10C to 18C, trending warmer later with largely cloudy skies. Watch for moderate uv in brighter breaks.

1.0 mm

Rain total

14 mph SSW

Wind max

gusts 27 mph

3.7

UV max

peak 13:00

Low

Pollen

Grass

Fair

Air quality

Very low

Thunder

CAPE 20

Atmosphere

Cloud avg 83%

Freezing level 3,690 mup to 3,880 m

Fog risk Low

Sun & Moon

06:25 / 19:44

Sun ↑↓

13 h 19 m

Daylight

00:47 / 18:03

Moon ↑↓

Waning Crescent

Moon phase

29% lit

Overcast

15° / 10° · Mon 7 Sep

Spells of rain most likely in morning and afternoon / evening. Southwesterly winds averaging around 15 mph with peaks near 18 mph, gusting to 33 mph. Temperatures range from 10C to 15C, turning cooler later with largely cloudy skies.

3.1 mm

Rain total

18 mph SW

Wind max

gusts 33 mph

2.6

UV max

peak 11:00

Pollen

Air quality

Very low

Thunder

CAPE 30

Atmosphere

Cloud avg 97%

Freezing level 3,500 mup to 3,870 m

Fog risk Low

Sun & Moon

06:26 / 19:42

Sun ↑↓

13 h 15 m

Daylight

-- / 18:33

Moon ↑↓

Waning Crescent

Moon phase

20% lit

Light drizzle

11° / 8° · Tue 8 Sep

Spells of rain most likely in midday and afternoon / evening. West-southwesterly winds averaging around 16 mph with peaks near 18 mph, gusting to 34 mph. Temperatures range from 8C to 11C with largely cloudy skies.

3.8 mm

Rain total

18 mph WSW

Wind max

gusts 34 mph

2.7

UV max

peak 15:00

Pollen

Air quality

Very low

Thunder

CAPE 130

Atmosphere

Cloud avg 67%

Freezing level --

Fog risk Low

Sun & Moon

06:28 / 19:40

Sun ↑↓

13 h 11 m

Daylight

02:20 / 18:51

Moon ↑↓

Waning Crescent

Moon phase

12% lit

Light drizzle

11° / 8° · Wed 9 Sep

Spells of rain most likely in morning, midday, and afternoon / evening. West-northwesterly winds averaging around 12 mph with peaks near 15 mph, gusting to 29 mph. Temperatures range from 8C to 11C with largely cloudy skies. Watch for moderate uv in brighter breaks.

2.8 mm

Rain total

15 mph WNW

Wind max

gusts 29 mph

3.2

UV max

peak 13:00

Pollen

Air quality

Very low

Thunder

CAPE 120

Atmosphere

Cloud avg 78%

Freezing level --

Fog risk Low

Sun & Moon

06:30 / 19:37

Sun ↑↓

13 h 7 m

Daylight

03:53 / 19:05

Moon ↑↓

Waning Crescent

Moon phase

6% lit

Overcast

14° / 7° · Thu 10 Sep

Patchy precipitation is possible, but coverage looks limited. Southerly winds averaging around 6 mph with peaks near 9 mph, gusting to 17 mph. Temperatures range from 7C to 14C, trending warmer later with largely cloudy skies. Watch for moderate uv in brighter breaks.

0.4 mm

Rain total

9 mph S

Wind max

gusts 17 mph

4.6

UV max

peak 13:00

Pollen

Air quality

Very low

Thunder

CAPE 80

Atmosphere

Cloud avg 78%

Freezing level --

Fog risk Low

Sun & Moon

06:32 / 19:35

Sun ↑↓

13 h 3 m

Daylight

05:22 / 19:16

Moon ↑↓

Waning Crescent

Moon phase

2% lit

Light drizzle

13° / 11° · Fri 11 Sep

Persistent rain most likely in morning, midday, and afternoon / evening. Westerly winds averaging around 10 mph with peaks near 13 mph, gusting to 24 mph. Temperatures range from 11C to 13C with largely cloudy skies.

6.8 mm

Rain total

13 mph W

Wind max

gusts 24 mph

2.5

UV max

peak 13:00

Pollen

Air quality

Very low

Thunder

CAPE 60

Atmosphere

Cloud avg 95%

Freezing level --

Fog risk Low

Sun & Moon

06:33 / 19:32

Sun ↑↓

12 h 58 m

Daylight

06:48 / 19:26

Moon ↑↓

New Moon

Moon phase

0% lit

Live rain radar

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0.4 mm

Last 24 h

41.4 mm

Last 7 days

Measured at Chapel Reservoir rain gauge, 7.2 km away

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Layer	Item	Material	Why
Base	Moisture-wicking top	Merino wool or synthetic; avoid cotton	A good standard choice in most conditions
Mid	Light fleece	Micro-fleece or lightweight synthetic; down OK (light rain only)	13°C with mild, windy insulation
Outer	Waterproof jacket	Lightweight breathable shell with a hood; you may not need it all day	Light drizzle with 1.4mm forecast
Lower	Walking trousers	Quick-dry, stretch; waterproof trousers in the pack just in case	Light drizzle, so walking trousers should cope
Feet	Walking boots	Standard boots, good grip on mixed terrain	Standard conditions
Extras	Hat, gloves, gaiters	Pack spare mid-layer, buff/neck gaiter	Cool on ridges, so extra warmth will be useful

Layer up. Plan to wear the main protection from the start.

Wear from the start 5 pieces

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 Peak District & South Pennines region

Unlikely

Saturday afternoon BEST

No clear window yet.

SAT AFTERNOON

No clear window

Unlikely

SUN MORNING

No clear window

Unlikely

Tap a period for detail

Key Factors

Temperature lid

Valley moisture

10%

Layer contrast

Summit clarity

Wind speed

Duration

No temperature inversion detected

Marginal moisture below

No moisture contrast, diffuse profile

Saturated above, no clear cap

Too windy, mixing likely

No sustained favourable window

Create Free Account for 1 Alert

Example email alert

Edale Very likely

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

See the best spot →

Email alerts sent up to 24h ahead.

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Cloud Inversion Heatmap

Atmospheric Profile · Edale · 229 m

Region Anchor

Loading… Timeline

Surface Pressure

Humidity at Pressure Levels

Temperature at Pressure Levels

Golden Hour

Today

DARKNESS

DAYLIGHT

05:38

06:03

06:23 Sunrise

06:43

07:08

Golden Hour · 40 min

Be at your summit by 06:03

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. Free accounts get one 24-hour alert; Premium alerts can warn you up to 48 hours ahead.

Cloud inversions explained

What is a cloud inversion near Mam Tor, Derbyshire?

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 Mam Tor, Derbyshire 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.

See the dedicated Mam Tor cloud inversion page Read the full UK cloud inversion guide See how WeatherDuck forecasts inversions

Common questions

When are cloud inversions most likely near Mam Tor?

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

Poor conditions Cloudy outlook — limited stargazing tonight.

Moon Waning Crescent 34%

Cloud Cover Mostly cloudy 74%

Moon Times Set 17:21 · Rise 23:22

Sky Clarity 22 km Clear

Lunar Day Day 23.6

Light Pollution View map ↓

Tonight's Aurora

Aurora & Solar Wind NOAA

3.0 Planetary Kp No Data

Solar wind data unavailable right now.

Nightly Outlook

Swipe or tap a day · cream arc = moon altitude · red dotted = horizon · orange = sun · green band = best stargazing window

Tonight

Waning Crescent · 34% illuminated

22 out of 100

60° 30° 0°

▲Moonrise 23:22

☀ Sunset 19:47

☀ Sunrise 06:25

182022000204060810

Cloud cover79% avg

Moonrise23:22

MoonsetPast dawn

Peak alt63° @ 09:00

Lunar day23.6

Sun

Waning Crescent · 25% illuminated

1 out of 100

60° 30° 0°

▲Moonrise 00:47

▼Moonset 18:03

☀ Sunset 19:44

☀ Sunrise 06:26

182022000204060810

Cloud cover96% avg

100

Moonrise00:47

Moonset18:03

Peak alt60° @ 09:40

Lunar day24.6

Mon

Waning Crescent · 16% illuminated

33 out of 100

60° 30° 0°

▲Moonrise 02:20

▼Moonset 18:33

☀ Sunset 19:42

☀ Sunrise 06:28

182022000204060810

Cloud cover69% avg

Moonrise02:20

Moonset18:33

Peak alt55° @ 10:00

Lunar day25.6

Tue

Waning Crescent · 9% illuminated

40 out of 100

60° 30° 0°

▲Moonrise 03:53

▼Moonset 18:51

☀ Sunset 19:40

☀ Sunrise 06:30

182022000204060810

Cloud cover63% avg

Moonrise03:53

Moonset18:51

Peak alt46° @ 10:00

Lunar day26.6

Wed

Waning Crescent · 4% illuminated

6 out of 100

60° 30° 0°

▲Moonrise 05:22

▼Moonset 19:05

☀ Sunset 19:37

☀ Sunrise 06:32

182022000204060810

Cloud cover95% avg

100

Moonrise05:22

Moonset19:05

Peak alt36° @ 10:00

Lunar day27.6

Thu

New Moon · 1% illuminated

10 out of 100

60° 30° 0°

▲Moonrise 06:48

▼Moonset 19:16

☀ Sunset 19:35

☀ Sunrise 06:33

182022000204060810

Cloud cover85% avg

100

Moonrise06:48

Moonset19:16

Peak alt25° @ 10:00

Lunar day28.6

Fri

New Moon · 0% illuminated

0 out of 100

60° 30° 0°

▼Moonset 19:26

☀ Sunset 19:32

☀ Sunrise 05:32

182022000204060810

Cloud cover89% avg

MoonriseAlready up

Moonset19:26

Peak alt14° @ 10:00

Lunar day0.1

Swipe / scroll, or tap a day above

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

Sat 5 Sep

Quiet

Peak Kp 2.7 at 03:00 UTC

No aurora expected — geomagnetic field calm.

9630

2.7 · 03:00

0003060912151821

Tomorrow

Sun 6 Sep

Quiet

Peak Kp 1.7 at 00:00 UTC

No aurora expected — geomagnetic field calm.

9630

1.7 · 00:00

0003060912151821

Mon 7

Mon 7 Sep

Unsettled

Peak Kp 3.7 at 12:00 UTC

Slightly unsettled — minor activity, no aurora expected.

9630

3.7 · 12:00

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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This uses Environment Agency rainfall data from the real-time data API (Beta). Rainfall data from the Scottish Environment Protection Agency (SEPA), licensed under the Open Government Licence v3.0. Natural Resources Wales data is licensed under the Open Government Licence v3.0. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.

Planning aid, not a safety service. Check official warnings before you go. Safety information

Weather data by Open-Meteo.com (UK Met Office Seamless) · Map data © OpenStreetMap contributors · Data sources & licences