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Saint-Malo combines a legendary home port (Route du Rhum, Transat Jacques Vabre), spectacular tides, and access to the Emerald Coast (Cap Fréhel, Saint-Cast). Sailing season April to October.
| Month | Air (°C) | Sea (°C) | Wind (kts) | Waves (m) | Rain (mm) | Verdict |
|---|---|---|---|---|---|---|
| January | 7.4° | 9.0° | 10.4· 15% | 1.04 | 85 | Avoid |
| February | 7.5° | 8.2° | 11.0· 18% | 1.07 | 66 | Avoid |
| March | 8.9° | 9.0° | 10.2· 15% | 0.90 | 63 | Fair |
| April | 10.8° | 11.3° | 8.4· 2% | 0.81 | 54 | Good |
| May | 13.6° | 14.5° | 8.6· 4% | 0.65 | 62 | Best |
| June | 16.7° | 18.7° | 7.6· 2% | 0.58 | 69 | Best |
| July | 18.5° | 20.1° | 8.2· 2% | 0.72 | 51 | Best |
| August | 18.4° | 19.8° | 8.1· 3% | 0.73 | 68 | Best |
| September | 17.3° | 19.9° | 8.2· 5% | 0.71 | 67 | Best |
| October | 14.3° | 17.5° | 9.3· 8% | 0.84 | 82 | Good |
| November | 10.7° | 12.5° | 10.5· 17% | 1.29 | 101 | Avoid |
| December | 8.7° | 10.3° | 11.0· 19% | 1.10 | 99 | Avoid |
Spring at Saint-Malo wakes Brittany's great sailing tradition. From April to June, schools reopen at Dinard and Saint-Servan, thermal winds settle (steady 10-15 knots), and water rises gradually from 10°C to 16°C. May and June offer the best learning and discovery conditions. Rivage villas near the port offer their best year-round rates.
Summer at Saint-Malo combines serious sailing and Breton art de vivre. From June to August, thermal winds make afternoons delightful for navigation, water reaches 18-19°C (warmer than the Channel thanks to geography), and cruises to Jersey, Guernsey or the Emerald Coast are ideal. Port slip bookings essential. Rivage villas with rampart views offer an exceptional setting.
Autumn anoints Saint-Malo as one of the great sporting sailing destinations. From September to October, conditions are more demanding but rich: sustained winds, golden maritime light, thinning crowds. It's also the great offshore-race season (preparations and departures). For sailors booking a Rivage villa, it's a chance to combine navigation and autumnal gastronomy (Cancale oysters, seafood).
Winter at Saint-Malo is a racer's season. Successive storms, formed sea, winds above 30 knots — sailing becomes a matter of hardened sailors or ocean races. For most, enjoy the off-water riches: ramparts, gastronomy, Christmas markets, day trips to Cancale or Mont Saint-Michel (45 min).
Breton winter. 7°C, strong winds, successive lows. Closed pleasure-boat season, save offshore racing.
Same as January. Frequent storms, very formed seas.
Winter exit. 10°C, organising winds, first deliveries. Spring regattas.
Resumption. 13°C, thermal winds settling, first bay navigations.
Excellent. 16°C, 10-15 knot winds, ideal conditions for learning and bay cruising.
Spring peak. 19°C, longest days, comfortable navigations to the Channel Islands (Jersey, Guernsey).
Breton summer (22°C). Thermal afternoon winds, pleasant conditions. Regatta and family cruising season.
Tourist peak. Port crowds, slip bookings essential. Very good sailing season.
The crown jewel. 19°C, thinning crowds, sustained winds still regular. Offshore racing periods (Route du Rhum preparation).
Excellent. 15°C, Breton maritime autumn, exceptional light. For those appreciating more sporting conditions.
Season's end. 11°C, first autumnal lows. Pleasure fleet leaving the water.
Winter. 8°C, sustained winter conditions. Closed season.
Data: Open-Meteo (ERA5), period 2014-2023. Updated May 5, 2026.