The temperatures in Arcachon in January are quite cold with temperatures between 6°C and 10°C, warm clothes are a must.
You can expect rain for roughly half of the month of January in Arcachon. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Arcachon in January 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
10° / 6°
Rainy Days
9
Snowy Days
0
Dry Days
22
Rainfall
122
mm
Sun Hours
8.1
Hrs
