Brittany weather in August 2025

Expect 20°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Brittany in August. Check more long-term weather averages for Brittany in August before you book your next holiday to Brittany in 2025/2026.

  • 20°C maximum daytime temperature in August in Brittany (Brest)20
    20°C max day temperature
  • 7 hours of sunshine per day
  • 15 days with some rainfall in August in Brittany (Brest)15
    15 days with some rainfall
  • 13°C minimum night-time temperature in August in Brittany (Brest)13
    13°C min night temperature
  • 14 hours of daylight per day in August in Brittany (Brest)14
    14 hours of daylight per day
  • No heat & humidity in August in Brittany (Brest)0
    No heat & humidity
  • 67 mm monthly rainfall in August in Brittany (Brest)67
    67 mm of monthly rainfall
  • UV (maximum) index 6 (High) in August in Brittany (Brest)6
    6 (High) UV index
  • 17°C sea temperature in August in Brittany (Brest)17
    17°C sea temperature

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The August weather guide for Brittany (Brest) 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 Brittany destinations

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

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

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How hot is it in Brittany in August?

Daytime temperatures usually reach 20°C in Brest, Brittany in August, falling to 13°C at night.

How sunny is it in Brittany in August?

There are normally 7 hours of bright sunshine each day in Brest, Brittany in August - that's 46% of daylight hours.

How warm is the sea around Brittany in August?

The average sea temperature around Brest, Brittany in August is 17°C.

Does it rain in Brittany in August?

There are usually 15 days with some rain in Brest, Brittany in August and the average monthly rainfall is 67mm.

Brittany August sunrise & sunset times

Browse the sunrise and sunset times for Brittany in August 2025. Select a month to view Brittany sunrise and sunset times for the next 12 months. The Brittany sunrise and sunset times shown below are for Brest.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:53 20:55
Saturday, 16th August 2025 06:13 20:30
Sunday, 31st August 2025 06:34 20:01

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