Current sea water temperature:
+50.4°F
| Minimum sea water temperature in March: | 50.5°F |
| Maximum sea water temperature in March: | 44.1°F |
| Average sea water temperature in March: | 47.8°F |
| more information | |
14 days
forecast
forecast
| Rennes |
monthly
weather
weather
| Rennes |
Sea water temperature for the last 10 days:
| March 17 | 50.4°F | March 12 | 50.5°F |
| March 16 | 50.5°F | March 11 | 50.4°F |
| March 15 | 50.4°F | March 10 | 50.2°F |
| March 14 | 50.2°F | March 9 | 50.0°F |
| March 13 | 50.0°F | March 8 | 49.8°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
March
March
| Rennes |
Best time for vacation in Rennes
Rennes on a weather map
Places in France:
Name
°F
24 Hours Forecast
Rennes
Local time: 10:40
March 17, tuesday
1200
55°F
NW
13 mph
13 mph
1500
61°F
NW
13 mph
13 mph
1800
59°F
NW
10 mph
10 mph
2100
48°F
W
9 mph
9 mph
March 18, wednesday
0000
48°F
W
11 mph
11 mph
0300
46°F
W
12 mph
12 mph
0600
46°F
W
15 mph
15 mph
0900
50°F
W
17 mph
17 mph
