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Saint-Malo’s maritime climate, shaped by the English Channel and Gulf Stream, delivers mild winters and cool summers. You’ll rarely see temperatures above 25°C (77°F) or below freezing. The city gets about 740mm of rain annually spread across roughly 130 rainy days, with no true dry season. The famous tides here, among the highest in Europe with a range of up to 13 metres, influence coastal conditions and create dramatic seascape changes twice daily. For more details, see our best time to visit Saint-Malo guide.
Saint-Malo Weather by Month: January
January is the coldest month with average highs of 9°C (48°F) and lows around 4°C (39°F). You’ll get about 70mm of rainfall over 16 wet days and just 2 hours of daily sunshine. The sea temperature drops to 10°C (50°F). Pack a waterproof coat and layers, since wind off the Channel can make it feel closer to 2°C. Hotel rates are at their lowest, often under €70/night for a double room Intra-Muros. For more details, see our things to do in Saint-Malo guide.
Saint-Malo Weather by Month: February
February sees average highs of 10°C (50°F) and lows of 4°C (39°F). Rainfall drops to about 58mm with 14 wet days, and sunshine increases slightly to 3 hours daily. The sea stays cold at 9°C (48°F). This is the quietest month for tourism, so you’ll have the ramparts almost to yourself. The annual Mardi Gras carnival sometimes falls in February, bringing brief bursts of colour to the grey streets. For more details, see our events and festivals in Saint-Malo guide.
Saint-Malo Weather by Month: March
March brings the first hints of spring with highs of 12°C (54°F) and lows of 5°C (41°F). Expect 58mm of rain across 14 days and 4 hours of sunshine. Sea temperature stays at 9°C. The equinox tides in March are particularly dramatic, often drawing photographers to the ramparts. Daylight stretches past 12 hours by the end of the month. For more details, see our best neighborhoods in Saint-Malo guide.
Saint-Malo Weather by Month: April
April warms to highs of 14°C (57°F) and lows of 7°C (45°F). Rainfall is the year’s lowest at 52mm over 12 days, and sunshine jumps to 6 hours daily. Sea temperature edges up to 11°C (52°F). This is when outdoor cafes start setting up tables on the cobblestones, and the first brave souls walk the Plage du Sillon barefoot. Easter weekends bring the first significant crowds. For more details, see our where to stay in Saint-Malo guide.
Saint-Malo Weather by Month: May
May delivers highs of 17°C (63°F) and lows of 10°C (50°F), with 60mm of rain over 13 days and 7 hours of daily sunshine, matching the summer peak. Sea temperature warms to 13°C (55°F). The Etonnants Voyageurs literary festival packs the city during a weekend in late May. Public holidays on May 1 and May 8 mean some restaurants and shops close, but the atmosphere is festive. For more details, see our Saint-Malo travel tips guide.
Saint-Malo Weather by Month: June
June averages 20°C (68°F) highs and 12°C (54°F) lows, with just 50mm of rain across 11 days, the driest month. Sunshine peaks at 7 hours daily and the sea reaches 15°C (59°F). The longest day (summer solstice around June 21) brings nearly 16 hours of daylight. The Fete de la Musique on June 21 fills streets with free live music. This is arguably the best month: warm enough for beach walks, dry enough for rampart circuits, and before the July-August price surge. For more details, see our Saint-Malo guide.
Saint-Malo Weather by Month: July
July brings the warmest temperatures with highs of 22°C (72°F) and lows of 14°C (57°F). Rainfall is 48mm over 11 days, and sunshine holds at 7 hours. Sea temperature reaches 17°C (63°F), swimmable for some. This is peak tourist season: hotel prices increase 40 to 60 percent above April rates, and restaurants require reservations. Bastille Day (July 14) brings fireworks over the bay.
Saint-Malo Weather by Month: August
August matches July’s highs of 22°C (72°F) but brings slightly more rain at 52mm over 12 days. Sea temperature peaks at 18°C (64°F), the warmest of the year. Sunshine stays at 7 hours daily. The city is packed, especially during the first two weeks when most French workers take their annual holiday. The Route du Rock festival in mid-August draws indie music fans to the beachside stages.
Saint-Malo Weather by Month: September
September cools to highs of 20°C (68°F) and lows of 12°C (54°F), with 60mm of rain over 13 days. Sunshine drops to 5 hours and the sea remains warm at 17°C (63°F). This is the sweet spot for many visitors: summer warmth without the August crowds. The European Heritage Days (Journees du Patrimoine) in mid-September open normally restricted historic buildings for free.
Saint-Malo Weather by Month: October
October sees highs of 16°C (61°F) and lows of 10°C (50°F), with rainfall increasing to 78mm over 15 days. Sunshine drops to 4 hours and the sea cools to 15°C (59°F). The Quai des Bulles comic festival in late October fills the convention centre. Equinox tides return this month, creating spectacular wave displays against the ramparts.
Saint-Malo Weather by Month: November
November brings highs of 12°C (54°F) and lows of 7°C (45°F), with 85mm of rain over 17 days, one of the wettest months. Sunshine drops to just 2 hours daily and the sea cools to 13°C (55°F). The city empties of tourists, making it ideal for photographers capturing moody seascapes. Many restaurants in the old town reduce their opening hours or close for annual holidays.
Saint-Malo Weather by Month: December
December matches January for chill with highs of 10°C (50°F) and lows of 5°C (41°F). Rainfall is the highest at 82mm over 17 days and sunshine stays at 2 hours. Sea temperature falls to 11°C (52°F). The Christmas market in Intra-Muros runs through most of December with wooden chalets, mulled wine, and Breton crafts. The New Year’s Eve fireworks over the harbour are a local tradition.
Saint-Malo Weather by Month: Quick Comparison
| Month | Avg High | Avg Low | Rain (mm) | Sun (hrs) | Sea |
|---|---|---|---|---|---|
| Jan | 9°C / 48°F | 4°C / 39°F | 70 | 2 | 10°C |
| Feb | 10°C / 50°F | 4°C / 39°F | 58 | 3 | 9°C |
| Mar | 12°C / 54°F | 5°C / 41°F | 58 | 4 | 9°C |
| Apr | 14°C / 57°F | 7°C / 45°F | 52 | 6 | 11°C |
| May | 17°C / 63°F | 10°C / 50°F | 60 | 7 | 13°C |
| Jun | 20°C / 68°F | 12°C / 54°F | 50 | 7 | 15°C |
| Jul | 22°C / 72°F | 14°C / 57°F | 48 | 7 | 17°C |
| Aug | 22°C / 72°F | 14°C / 57°F | 52 | 7 | 18°C |
| Sep | 20°C / 68°F | 12°C / 54°F | 60 | 5 | 17°C |
| Oct | 16°C / 61°F | 10°C / 50°F | 78 | 4 | 15°C |
| Nov | 12°C / 54°F | 7°C / 45°F | 85 | 2 | 13°C |
| Dec | 10°C / 50°F | 5°C / 41°F | 82 | 2 | 11°C |
