The temperatures in Grimstad in August are usually low and can range between 13°C and 19°C.
You can expect about 3 to 8 days of rain in Grimstad 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 Grimstad in August 2025.
If you’re planning to visit Grimstad in the near future, we highly recommend that you review the 14 day weather forecast for Grimstad before you arrive.
Temperatures
19° / 13°
Rainy Days
7
Snowy Days
0
Dry Days
24
Rainfall
130
mm
Sun Hours
10.0
Hrs
