The temperatures in Brittany in August are comfortable with low of 13°C and and high up to 23°C.
You can expect about 3 to 8 days of rain in Brittany during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Brittany in August 2025.
If you’re planning to visit Brittany in the near future, we highly recommend that you review the 14 day weather forecast for Brittany before you arrive.