Ascension (St Helena - Ascension and Tristan Da Cunha) weather

Find a forecast

Forecast days

Today

Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 23° Celsius;

Sunrise: 06:50

Sunset: 18:54

Sunny intervals changing to partly cloudy by early evening.

Ex UV

No pollution data.

No pollen data.

Today

Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 23° Celsius;
Thu 18 Sep

Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 23° Celsius;

Sunrise: 06:50

Sunset: 18:54

Sunny changing to partly cloudy by early evening.

Ex UV

No pollution data.

No pollen data.

Thu 18 Sep

Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 23° Celsius;
Fri 19 Sep

Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 23° Celsius;

Sunrise: 06:49

Sunset: 18:54

Overcast changing to sunny intervals by late morning.

Ex UV

No pollution data.

No pollen data.

Fri 19 Sep

Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 23° Celsius;
Sat 20 Sep

Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 23° Celsius;

Sunrise: 06:48

Sunset: 18:54

Sunny intervals changing to partly cloudy by early evening.

Ex UV

No pollution data.

No pollen data.

Sat 20 Sep

Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 23° Celsius;
Sun 21 Sep

Maximum daytime temperature: 23° Celsius; Minimum nighttime temperature: 23° Celsius;

Sunrise: 06:48

Sunset: 18:53

Sunny intervals changing to cloudy by late morning.

Ex UV

No pollution data.

No pollen data.

Sun 21 Sep

Maximum daytime temperature: 23° Celsius; Minimum nighttime temperature: 23° Celsius;
Mon 22 Sep

Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 23° Celsius;

Sunrise: 06:47

Sunset: 18:53

Sunny intervals changing to overcast by early evening.

Ex UV

No pollution data.

No pollen data.

Mon 22 Sep

Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 23° Celsius;

Sunny intervals changing to partly cloudy by early evening.

Sunrise: 06:50

Sunset: 18:54

Ex UV

No pollution data.

No pollen data.

6 day forecast for Ascension

Tomorrow (17 September 2025)

Time	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
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	24°	24°	24°	23°	23°
Feels like temperature (°C)	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	22°	22°	22°	21°	21°	21°	21°	21°	21°
Wind direction and speed (mph)	SE 14	SE 14	SE 14	SE 14	SE 14	SE 14	SE 14	SE 14	ESE 14	ESE 15	ESE 15	ESE 15	SE 15	SE 15	SE 15	SE 15	SE 15	SE 15	SE 16	SE 17	SE 17	SE 18	SE 18	SE 18
Wind gust (mph)	20	19	19	19	19	19	19	20	20	21	21	21	21	21	21	20	21	21	22	23	24	24	25	25
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	74%	75%	75%	75%	75%	75%
UV	-	-	-	-	-	-	1	1	2	5	8	11	12	12	10	7	4	1	1	-	-	-	-	-

Thursday (18 September 2025)

Time	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
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°
Feels like temperature (°C)	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°
Wind direction and speed (mph)	SE 18	SE 18	SE 18	SE 18	SE 17	SE 17	SE 17	SE 17	SE 17	SE 17	SE 17	SE 17	SE 17	SE 17	SE 16	SE 16	SE 16	SE 16	SE 17	SE 17	SE 17	SE 18	SE 18	SE 18
Wind gust (mph)	24	24	24	24	24	23	23	23	24	23	23	23	23	22	22	22	22	22	23	23	24	24	24	24
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	75%	75%	76%	76%	76%	76%	76%	76%	76%	76%	76%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%
UV	-	-	-	-	-	-	1	1	2	4	8	9	11	11	10	7	4	1	1	-	-	-	-	-

Friday (19 September 2025)

Time	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
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°
Feels like temperature (°C)	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°	21°
Wind direction and speed (mph)	SE 19	SE 18	SE 18	SE 18	SE 18	SE 17	SE 17	SE 17	ESE 18	ESE 18	ESE 18	ESE 17	ESE 17	ESE 17	ESE 17	ESE 17	ESE 17	ESE 18	SE 18	SE 19	SE 19	SE 19	SE 19	SE 19
Wind gust (mph)	24	24	24	24	24	23	24	24	24	24	24	23	23	23	23	24	24	24	25	26	26	26	26	27
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	76%	76%	77%	79%	80%	79%	81%	81%	80%	81%	81%	81%	81%	82%	82%	82%	81%	81%	81%	79%	79%	79%	77%	79%
UV	-	-	-	-	-	-	1	1	2	4	6	9	11	11	9	7	4	1	1	-	-	-	-	-

Saturday (20 September 2025)

Time	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
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°	23°
Feels like temperature (°C)	20°	20°	20°	20°	20°	20°	20°	21°	20°	21°	21°	21°	21°	21°	21°	21°	21°	21°	20°	20°	20°	20°	20°	20°
Wind direction and speed (mph)	SE 19	SE 19	ESE 19	ESE 19	ESE 18	ESE 18	ESE 18	ESE 18	ESE 18	ESE 18	ESE 18	ESE 18	ESE 17	ESE 17	ESE 17	SE 18	SE 18	SE 18	SE 19	SE 20	SE 21	SE 21	SE 21	ESE 21
Wind gust (mph)	26	26	26	25	24	24	24	24	24	24	24	24	24	23	23	25	25	26	27	27	27	28	28	28
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	78%	77%	76%	76%	76%	76%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%	75%
UV	-	-	-	-	-	-	1	1	2	4	8	11	12	12	10	7	4	1	1	-	-	-	-	-

Sunday (21 September 2025)

Time	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	23°	23°	23°	23°	23°	23°	23°	23°
Feels like temperature (°C)	20°	20°	20°	20°	20°	20°	20°	19°
Wind direction and speed (mph)	ESE 20	ESE 19	ESE 19	ESE 19	ESE 20	ESE 20	SE 21	SE 22
Wind gust (mph)	28	27	26	27	27	28	30	30
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	75%	75%	75%	75%	75%	75%	75%	75%
UV	-	-	1	4	12	7	1	-

Monday (22 September 2025)

Time	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	23°	23°	23°	23°	23°	23°	24°	24°
Feels like temperature (°C)	19°	20°	19°	20°	20°	20°	20°	19°
Wind direction and speed (mph)	ESE 22	ESE 21	ESE 21	ESE 21	ESE 21	ESE 21	ESE 21	ESE 23
Wind gust (mph)	30	29	29	29	29	30	31	31
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	75%	75%	75%	75%	75%	75%	74%	74%
UV	-	-	1	4	12	7	1	-

UK video forecast

weather map

Forecast

Forecast for 00:00 (UTC), Wed

Updated 00:29 (UTC+1) on Wed 17 Sep 2025

Loading map...

Ascension (St Helena - Ascension and Tristan Da Cunha) weather

Find a forecast

Forecast days

Today

Today

Thu 18 Sep

Thu 18 Sep

Fri 19 Sep

Fri 19 Sep

Sat 20 Sep

Sat 20 Sep

Sun 21 Sep

Sun 21 Sep

Mon 22 Sep

Mon 22 Sep

6 day forecast for Ascension

Tooltip header

UK video forecast

Nearest forecasts

More from the Met Office

Causes of climate change

Floods and flooding

What are the different types of rain?

Weather warriors DIY activity

What is the difference between rain and showers?

5 tips for staying safe in a thunderstorm

Help us improve our website