World Resorts France Chamonix Weather

Chamonix Sea Temperature in September

Average sea water temperature in September:
+66.1°F
Minimum sea water temperature in September: 75.0°F
Maximum sea water temperature in September: 32.0°F

Daily sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 70.9°F. The highest and lowest sea temperatures during the month were 74.8°F and 67.3°F.

Monthly sea water temperature in Chamonix, °F

Which France resorts have warmest sea in September?

Place name September 2026 September 2025
Portivecju 80.6°F 76.3°F
Bastia 80.3°F 76.0°F
Bunifaziu 80.0°F 75.7°F
Aiacciu 79.9°F 75.9°F
Corsica 79.6°F 75.6°F
Propriano 79.4°F 75.3°F
Roquebrune Cap Martin 79.2°F 75.5°F
Saint Jean Cap Ferrat 79.1°F 75.5°F
Calvi 79.1°F 75.8°F
Menton 79.0°F 75.4°F
Nice 78.9°F 75.3°F
Juan les Pins 78.7°F 75.0°F
Antibes 78.7°F 75.0°F
Theoule Sur Mer 78.7°F 74.8°F
Mandelieu la Napoule 78.7°F 74.8°F
Cannes 78.7°F 74.9°F
Saint Laurent du Var 78.7°F 75.1°F
Golfe Juan 78.7°F 74.9°F
Cagnes sur Mer 78.6°F 75.0°F
Frejus 78.1°F 74.3°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 63.1 °F
June 60.3 °F
Warmest sea temp:
August 70.3 °F
July 69.2 °F
September 66.1 °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
+39°F
NW 2 mph
Feels like: +39°F
Precip.: 12%
Places in France:
Name
°F
+72°F
+61°F
+52°F
+72°F
+68°F
+70°F
+72°F
+68°F
+66°F
+61°F
+68°F
+72°F
+68°F
+64°F
+61°F
24 Hours Forecast
Chamonix
Local time: 06:39
October 05, monday
0900
55°F
W
2 mph
1200
63°F
SE
4 mph
1500
64°F
SE
6 mph
1800
61°F
SE
4 mph
2100
45°F
NW
1 mph
October 06, tuesday
0000
41°F
NW
4 mph
0300
41°F
NW
5 mph
0600
39°F
NW
5 mph
Units of measurement: °C / °F