Measurements:
°C
°F
Chamonix
50°F
NW 5 mph
Feels like: 50°F
Precip: 6%
World Resorts France Chamonix Weather

Chamonix Sea Water Temperature

Current Sea Water Temperature:
+75.0°F
Maximum Sea Water Temperature in June: 78.6°F
Minimum Sea Water Temperature in June: 30.0°F
Average water temperature in June: 64.4°F

Sea Water Temperature for the Last 10 Days:

June 19 75.0°F June 14 70.6°F
June 18 73.2°F June 13 69.6°F
June 17 71.8°F June 12 68.6°F
June 16 71.2°F June 11 68.4°F
June 15 70.4°F June 10 68.2°F

When is the Warmest Sea for Chamonix?

According to our data for the last three years for Chamonix 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 Chamonix was 75.5°F. The maximum and minimum values were 73.0°F and 78.2°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Chamonix was 74.9°F. The maximum and minimum values were 71.6°F and 78.2°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Chamonix was 70.1°F. The maximum and minimum values were 66.4°F and 74.0°F respectively.

Best Time to Visit Chamonix
The most sunny months:
August 17 days
October 16 days
July 15 days
The most warm months:
July 65.1 °F
August 64.4 °F
June 61.3 °F
Warmest sea temperature:
August 72.1 °F
July 70.8 °F
September 67.5 °F
The most cold months:
January 24.5 °F
December 27.4 °F
February 27.9 °F
The most rainy months:
June 11 days
May 10 days
July 9 days
The most windy months:
January 4 mph
December 4 mph
February 4 mph

Chamonix on the Weather Map

France Resorts:
NAME
Antibes +76
Arcachon +68
Bordeaux +66
Cannes +74
Corsica +72
Etretat +64
Marseilles +76
Menton +76
Montpellier +70
Nice +76
Paris +70
Perpignan +70
Saint-Tropez +76
Toulon +76
Toulouse +68
24 Hours Weather Forecast
Chamonix
Local time: 02:14
20 jun, saturday
0300 50°F
NW
5 mph
0600 50°F
NW
4 mph
0900 64°F
NE
1 mph
1200 70°F
SE
4 mph
1500 72°F
SE
4 mph
1800 68°F
S
2 mph
2100 60°F
W
1 mph
21 jun, sunday
0000 56°F
N
2 mph