The temperatures in Arcachon in August are comfortable with low of 18°C and and high up to 26°C.
You can expect about 3 to 8 days of rain in Arcachon 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 Arcachon in August 2026.
If you’re planning to visit Arcachon in the near future, we highly recommend that you review the 14 day weather forecast for Arcachon before you arrive.
Temperatures
26° / 18°
Rainy Days
3
Snowy Days
0
Dry Days
28
Rainfall
60
mm
Sun Hours
11.0
Hrs
