World Resorts France Chamonix Weather

Chamonix sea water temperature

Current sea water temperature:
+47.5°F
Minimum sea water temperature in December: 53.1°F
Maximum sea water temperature in December: 44.4°F
Average sea water temperature in December: 48.6°F

Sea water temperature for the last 10 days:

December 31 47.5°F December 26 47.3°F
December 30 46.2°F December 25 47.8°F
December 29 46.2°F December 24 46.8°F
December 28 46.2°F December 23 47.3°F
December 27 46.8°F December 22 47.8°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:
2025
2024
2023

The average sea water temperature in July of 2025 was 72.4°F. The highest and lowest sea temperatures during the month were 75.4°F and 69.4°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 63.6 °F
August 62.9 °F
June 60.1 °F
Warmest sea temp:
August 69.9 °F
July 68.7 °F
September 65.7 °F
Coldest months:
January 27.1 °F
December 29.7 °F
February 30.0 °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
+12°F
W 4 mph
Feels like: +7°F
Precip.: 0%
Places in France:
Name
°F
+23°F
+46°F
+39°F
+36°F
+48°F
+48°F
+46°F
+50°F
+39°F
+48°F
+37°F
+48°F
+37°F
+12°F
+41°F
24 Hours Forecast
Chamonix
Local time: 19:12
December 31, wednesday
2100
14°F
W
4 mph
January 01, thursday
0000
14°F
NW
3 mph
0300
16°F
NW
4 mph
0600
16°F
NW
4 mph
0900
18°F
N
4 mph
1200
30°F
NE
5 mph
1500
28°F
NE
5 mph
1800
19°F
N
6 mph
Units of measurement: °C / °F