Current sea water temperature:
+53.1°F
| Minimum sea water temperature in December: | 55.6°F |
| Maximum sea water temperature in December: | 48.9°F |
| Average sea water temperature in December: | 51.4°F |
| more information | |
14 days
forecast
forecast
| Rennes |
monthly
weather
weather
| Rennes |
Sea water temperature for the last 10 days:
| December 4 | 53.1°F | November 29 | 53.6°F |
| December 3 | 53.2°F | November 28 | 53.8°F |
| December 2 | 53.6°F | November 27 | 54.0°F |
| December 1 | 53.6°F | November 26 | 54.1°F |
| November 30 | 53.6°F | November 25 | 54.5°F |
Monthly sea water temperature, °F
When is the warmest sea in Rennes?
Based on the data about daily sea water temperature for the last three years the warmest sea in Rennes was noticed in August, September and July.
Monthly Sea Temperatures in Rennes, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 67.3°F. The highest and lowest sea temperatures during the month were 68.2°F and 65.7°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 64.9°F. The highest and lowest sea temperatures during the month were 66.9°F and 62.8°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 65.6°F. The highest and lowest sea temperatures during the month were 66.7°F and 63.7°F.
current
weather
weather
| Rennes |
weather in
December
December
| Rennes |
Best time for vacation in Rennes
Rennes on a weather map
Places in France:
Name
°F
24 Hours Forecast
Rennes
Local time: 05:10
December 05, friday
0600
37°F
NE
6 mph
6 mph
0900
39°F
N
7 mph
7 mph
1200
46°F
N
14 mph
14 mph
1500
45°F
NW
19 mph
19 mph
1800
50°F
N
22 mph
22 mph
2100
54°F
NE
12 mph
12 mph
December 06, saturday
0000
50°F
NE
15 mph
15 mph
0300
52°F
NE
17 mph
17 mph
