Current sea water temperature:
+68.5°F
| Minimum sea water temperature in August: | 70.2°F |
| Maximum sea water temperature in August: | 63.1°F |
| Average sea water temperature in August: | 66.0°F |
| more information | |
14 days
forecast
forecast
| Rennes |
monthly
weather
weather
| Rennes |
Sea water temperature for the last 10 days:
| August 25 | 68.5°F | August 20 | 69.8°F |
| August 24 | 68.5°F | August 19 | 69.6°F |
| August 23 | 67.8°F | August 18 | 70.0°F |
| August 22 | 68.2°F | August 17 | 70.0°F |
| August 21 | 68.9°F | August 16 | 69.6°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:
2026
2025
2024
The average sea water temperature in August of 2026 was 68.8°F. The highest and lowest sea temperatures during the month were 70.2°F and 67.3°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 67.2°F. The highest and lowest sea temperatures during the month were 68.9°F and 64.9°F.
current
weather
weather
| Rennes |
weather in
August
August
| Rennes |
Best time for vacation in Rennes
Rennes on a weather map
Places in France:
Name
°F
24 Hours Forecast
Rennes
Local time: 02:10
August 26, wednesday
0300
59°F
NE
6 mph
6 mph
0600
59°F
NE
4 mph
4 mph
0900
64°F
N
7 mph
7 mph
1200
75°F
N
9 mph
9 mph
1500
73°F
N
8 mph
8 mph
1800
73°F
SW
2 mph
2 mph
2100
63°F
W
9 mph
9 mph
August 27, thursday
0000
61°F
NW
11 mph
11 mph
