The weather in Roseau in August is very hot. The average temperatures are between 25°C and 30°C, drinking water regularly is advisable.
You can expect about 3 to 8 days of rain in Roseau 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 Roseau in August 2025.
If you’re planning to visit Roseau in the near future, we highly recommend that you review the 14 day weather forecast for Roseau before you arrive.
Temperatures
30° / 25°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
180
mm
Sun Hours
11.5
Hrs
