World Resorts France Chamonix Weather

Chamonix sea water temperature

Current sea water temperature:
+75.2°F
Minimum sea water temperature in August: 77.9°F
Maximum sea water temperature in August: 32.0°F
Average sea water temperature in August: 69.9°F

Sea water temperature for the last 10 days:

August 5 75.2°F July 31 75.6°F
August 4 76.8°F July 30 76.3°F
August 3 76.3°F July 29 74.5°F
August 2 77.0°F July 28 74.7°F
August 1 75.7°F July 27 73.9°F

When is the warmest sea in Chamonix?

Based on the data about daily sea water temperature for the last three years the warmest sea in Chamonix was noticed in August, July and September.

Monthly Sea Temperatures in Chamonix, °F

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 72.9°F. The highest and lowest sea temperatures during the month were 75.4°F and 70.7°F.

Sea water temperature in July, °F

Show year:
2026
2025
2024

The average sea water temperature in July of 2026 was 76.1°F. The highest and lowest sea temperatures during the month were 79.9°F and 73.9°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 68.1°F. The highest and lowest sea temperatures during the month were 71.6°F and 64.8°F.

Best time for vacation in Chamonix

Sunniest months:
August 17 days
October 16 days
July 15 days
Warmest months:
July 63.7 °F
August 62.9 °F
June 60.3 °F
Warmest sea temp:
August 69.9 °F
July 69.2 °F
September 65.7 °F
Coldest months:
January 27.0 °F
December 29.7 °F
February 30.1 °F
Rainiest months:
June 11 days
May 10 days
July 9 days
Windiest months:
January 4.9 mph
December 4.8 mph
February 4.7 mph

Chamonix on a weather map

Chamonix
+55°F
W 1 mph
Feels like: +55°F
Precip.: 28%
Places in France:
Name
°F
+79°F
+66°F
+61°F
+77°F
+72°F
+84°F
+81°F
+82°F
+79°F
+68°F
+79°F
+79°F
+81°F
+75°F
+64°F
24 Hours Forecast
Chamonix
Local time: 22:50
August 06, thursday
0000
55°F
W
1 mph
0300
54°F
NE
1 mph
0600
50°F
E
1 mph
0900
59°F
SE
2 mph
1200
66°F
SE
5 mph
1500
66°F
SE
6 mph
1800
64°F
SE
6 mph
2100
55°F
S
3 mph
Units of measurement: °C / °F