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

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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.

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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.

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