Measurements:
°C
°F
Cassis
84°F
NW 7 mph
Feels like: 86°F
Precip: 4%
World Resorts France Cassis Weather

Cassis Sea Water Temperature

Current Sea Water Temperature:
+79.4°F
Maximum Sea Water Temperature in July: 85.0°F
Minimum Sea Water Temperature in July: 63.8°F
Average water temperature in July: 75.4°F

Sea Water Temperature for the Last 10 Days:

July 09 79.4°F July 04 75.4°F
July 08 80.2°F July 03 77.6°F
July 07 78.2°F July 02 78.4°F
July 06 77.2°F July 01 80.4°F
July 05 76.0°F June 30 80.4°F

When is the Warmest Sea for Cassis?

According to our data for the last three years for Cassis the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Cassis was 77.4°F. The maximum and minimum values were 69.6°F and 82.4°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Cassis was 75.7°F. The maximum and minimum values were 66.2°F and 84.6°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Cassis was 73.0°F. The maximum and minimum values were 68.4°F and 77.2°F respectively.

Best Time to Visit Cassis
The most sunny months:
July 29 days
August 28 days
June 25 days
The most warm months:
August 85.3 °F
July 85.2 °F
June 79.4 °F
Warmest sea temperature:
August 77.4 °F
July 75.3 °F
September 74.8 °F
The most cold months:
January 51.5 °F
February 52.7 °F
December 54.4 °F
The most rainy months:
November 4 days
October 3 days
December 3 days
The most windy months:
January 13 mph
March 13 mph
February 12 mph

Cassis on the Weather Map

France Resorts:
NAME
Antibes +84
Arcachon +78
Cannes +86
Corsica +84
Deauville +78
Etretat +74
Marseilles +84
Menton +84
Montpellier +82
Nice +84
Paris +80
Perpignan +82
Saint-Tropez +84
Toulon +86
Toulouse +82
24 Hours Weather Forecast
Cassis
Local time: 08:21
10 jul, friday
0900 84°F
NW
7 mph
1200 86°F
N
12 mph
1500 86°F
N
12 mph
1800 86°F
NW
11 mph
2100 82°F
NW
8 mph
11 jul, saturday
0000 82°F
SW
7 mph
0300 78°F
NW
4 mph
0600 78°F
SW
5 mph