Southampton weather in August 2025

Q: How hot is it in Southampton in August?

Daytime temperatures usually reach 21°C in Southampton in August, falling to 12°C at night.

Q: How sunny is it in Southampton in August?

There are normally 6 hours of bright sunshine each day in Southampton in August - that's 44% of daylight hours.

Q: Does it rain in Southampton in August?

There are usually 11 days with some rain in Southampton in August and the average monthly rainfall is 55mm.

Expect daytime maximum temperatures of 21°C in Southampton in August based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 55 mm of rainfall in the month.

21
21°C max day temperature
6
6 hours of sunshine per day
11
11 days with some rainfall
12
12°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
55
55 mm of monthly rainfall
6
6 (High) UV index

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The August weather guide for England (Southampton) 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.

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

More about England

How hot is it in Southampton in August?

Daytime temperatures usually reach 21°C in Southampton in August, falling to 12°C at night.

How sunny is it in Southampton in August?

There are normally 6 hours of bright sunshine each day in Southampton in August - that's 44% of daylight hours.

Does it rain in Southampton in August?

There are usually 11 days with some rain in Southampton in August and the average monthly rainfall is 55mm.

Southampton August sunrise & sunset times

Browse the sunrise and sunset times for Southampton in August 2025. Select a month to view Southampton sunrise and sunset times for the next 12 months.

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