St Helena & Islands weather in August 2025

Q: How warm is it in St Helena & Islands in August?

Daytime temperatures usually reach 17°C in St Helena, St Helena & Islands in August, falling to 14°C at night.

Q: How warm is the sea around St Helena & Islands in August?

The average sea temperature around St Helena, St Helena & Islands in August is 21°C.

Q: Does it ever rain in St Helena & Islands in August?

There are usually 15 days with some rain in St Helena, St Helena & Islands in August and the average monthly rainfall is 68mm.

Expect 17°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in St Helena & Islands in August. Check more long-term weather averages for St Helena & Islands in August before you book your next holiday to St Helena & Islands in 2025/2026.

17
17°C max day temperature
15
15 days with some rainfall
14
14°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
68
68 mm of monthly rainfall
9
9 (Very High) UV index
21
21°C sea temperature

More about St Helena & Islands

St Helena & Islands by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for St Helena & Islands

KAYAK: Top UK travel deals of the day

Sale

Save on UK travel with KAYAK's deals of the day
Find deals for destinations around the world
Filter by travel deal type, budget & month

Go to KAYAK deal >>

View all KAYAK offers

The August weather guide for St Helena & Islands (St Helena) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top St Helena & Islands destinations

Below are average maximum temperatures at popular countries, regions and places in St Helena & Islands in August. Select a holiday destination to see more weather parameters.

All St Helena & Islands destinations

Metric (°C / mm) | Imperial (°F / inches)

How warm is it in St Helena & Islands in August?

Daytime temperatures usually reach 17°C in St Helena, St Helena & Islands in August, falling to 14°C at night.

How warm is the sea around St Helena & Islands in August?

The average sea temperature around St Helena, St Helena & Islands in August is 21°C.

Does it ever rain in St Helena & Islands in August?

There are usually 15 days with some rain in St Helena, St Helena & Islands in August and the average monthly rainfall is 68mm.

St Helena & Islands August sunrise & sunset times

Browse the sunrise and sunset times for St Helena & Islands in August 2025. Select a month to view St Helena & Islands sunrise and sunset times for the next 12 months. The St Helena & Islands sunrise and sunset times shown below are for St Helena.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec