France · Atlantic Europe
Mont-Saint-Michel
Sea
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Air
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Climate · monthly averages
Sea temperature by month
30-year averages (1996–2025). Min/Max are typical daily lows and highs, not record extremes.
39°F
46°F
54°F
61°F
68°F
75°F
January
47.1°F(45°F–48°F)
February
45.8°F(44°F–47°F)
March
46.9°F(44°F–49°F)
April
50.4°F(48°F–52°F)
May
54.9°F(53°F–58°F)
June
60.2°F(58°F–64°F)
July
64.3°F(62°F–68°F)
August
66.1°F(64°F–69°F)
September
64.5°F(63°F–66°F)
October
60.3°F(59°F–62°F)
November
54.8°F(53°F–56°F)
December
49.9°F(49°F–51°F)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MinMin °F | 4544.8 | 4444.3 | 4444.3 | 4848.5 | 5352.5 | 5857.9 | 6261.9 | 6464.1 | 6363.1 | 5959.1 | 5353.2 | 4948.6 |
| AvgAvg °F | 4747.1 | 4645.8 | 4746.9 | 5050.4 | 5554.9 | 6060.2 | 6464.3 | 6666.1 | 6564.5 | 6060.3 | 5554.8 | 5049.9 |
| MaxMax °F | 4848.5 | 4747.1 | 4948.5 | 5252.4 | 5858.0 | 6463.5 | 6867.7 | 6968.8 | 6666.5 | 6261.6 | 5656.1 | 5151.0 |
Warmest in August (66.1°F). Coldest in February (45.8°F). Comfortable for swimming from August to September.
About Mont-Saint-Michel
On the Normandy-Brittany border, where the Couesnon meets the English Channel, the Abbaye du Mont-Saint-Michel crowns a granite islet, its stacked Romanesque and Gothic stonework rising 80 metres above the water. Founded in 966 and UNESCO-listed since 1979, the abbey is reached today by a stilted bridge across the tidal flats. The surrounding bay holds Europe's largest tidal range — up to 14 metres, rushing in faster than a galloping horse. The sea peaks at a cool 16–18 °C from July to September; Rennes airport is 75 minutes by the A84.