Current sea water temperature:
+68.4°F
| Minimum sea water temperature in July: | 68.9°F |
| Maximum sea water temperature in July: | 59.4°F |
| Average sea water temperature in July: | 64.2°F |
| more information | |
14 days
forecast
forecast
| Rennes |
monthly
weather
weather
| Rennes |
Sea water temperature for the last 10 days:
| July 16 | 68.4°F | July 11 | 68.0°F |
| July 15 | 68.9°F | July 10 | 67.1°F |
| July 14 | 68.0°F | July 9 | 65.3°F |
| July 13 | 68.9°F | July 8 | 65.7°F |
| July 12 | 68.9°F | July 7 | 65.7°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 66.9°F. The highest and lowest sea temperatures during the month were 68.9°F and 64.9°F.
current
weather
weather
| Rennes |
weather in
July
July
| Rennes |
Best time for vacation in Rennes
Rennes on a weather map
Places in France:
Name
°F
24 Hours Forecast
Rennes
Local time: 18:46
July 16, thursday
2100
64°F
S
4 mph
4 mph
July 17, friday
0000
63°F
S
3 mph
3 mph
0300
61°F
SE
3 mph
3 mph
0600
57°F
S
6 mph
6 mph
0900
64°F
SW
6 mph
6 mph
1200
75°F
SW
7 mph
7 mph
1500
82°F
S
9 mph
9 mph
1800
82°F
S
15 mph
15 mph
