Current sea water temperature:
+45.3°F
| Minimum sea water temperature in December: | 50.4°F |
| Maximum sea water temperature in December: | 41.9°F |
| Average sea water temperature in December: | 45.6°F |
| more information | |
14 days
forecast
forecast
| St Gallen |
monthly
weather
weather
| St Gallen |
Sea water temperature for the last 10 days:
| December 18 | 45.3°F | December 13 | 44.8°F |
| December 17 | 44.6°F | December 12 | 45.1°F |
| December 16 | 44.6°F | December 11 | 45.0°F |
| December 15 | 44.6°F | December 10 | 45.3°F |
| December 14 | 44.6°F | December 9 | 47.7°F |
Monthly sea water temperature, °F
When is the warmest sea in St Gallen?
Based on the data about daily sea water temperature for the last three years the warmest sea in St Gallen was noticed in August, July and September.
Monthly Sea Temperatures in St Gallen, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 71.8°F. The highest and lowest sea temperatures during the month were 74.8°F and 67.8°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 72.9°F. The highest and lowest sea temperatures during the month were 76.3°F and 70.9°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 66.8°F. The highest and lowest sea temperatures during the month were 70.5°F and 63.3°F.
current
weather
weather
| St Gallen |
weather in
December
December
| St Gallen |
Best time for vacation in St Gallen
St Gallen on a weather map
Places in Switzerland:
Name
°F
24 Hours Forecast
St Gallen
Local time: 02:22
December 19, friday
0300
37°F
N
4 mph
4 mph
0600
37°F
N
4 mph
4 mph
0900
37°F
N
2 mph
2 mph
1200
46°F
SE
1 mph
1 mph
1500
46°F
W
1 mph
1 mph
1800
41°F
N
3 mph
3 mph
2100
39°F
N
2 mph
2 mph
December 20, saturday
0000
39°F
NW
3 mph
3 mph
