The temperatures in Gruissan in September are comfortable with low of 17°C and and high up to 25°C.
You can expect about 3 to 8 days of rain in Gruissan during the month of September. 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 Gruissan in September 2026.
If you’re planning to visit Gruissan in the near future, we highly recommend that you review the 14 day weather forecast for Gruissan before you arrive.
Temperatures
25° / 17°
Rainy Days
3
Snowy Days
0
Dry Days
27
Rainfall
53
mm
Sun Hours
11.3
Hrs
