Cherbourg-en-Cotentin to Les Sables-d'Olonne — sea route & marine weather
The sea route from Cherbourg-en-Cotentin (FRCER) to Les Sables-d'Olonne (FRLSO) is about 397 nm — about 40 hours at 10 kn. Along the route today (Nov 2): NE wind 9–25 kn, waves 0.6–2.1 m. The baseline track is drawn on the chart; Calculate replans it for your vessel and live weather.
Passage facts| Sea-route distance | 397 nm |
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| Passage time at 10 kn | about 40 hours |
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| Great-circle distance | 188 nm |
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| Cherbourg-en-Cotentin | 49°38.0′N 1°37.0′W |
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| Les Sables-d'Olonne | 46°30.0′N 1°47.0′W |
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| Reference vessel | 4.5 m draft, 10 kn cruise |
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10-day marine forecast — along the route
| Date | Wind | Gusts | Waves |
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| NE 9–25 kn | 28 kn | 0.6–2.1 m |
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| NE 11–26 kn | 28 kn | 0.4–2.2 m |
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| ENE 10–27 kn | 29 kn | 0.5–2.7 m |
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| ESE 2–24 kn | 26 kn | 0.6–2.4 m |
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| ESE 6–16 kn | 15 kn | 0.4–1.2 m |
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| ESE 1–11 kn | 15 kn | 0.3–0.8 m |
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| ESE 10–20 kn | 23 kn | 0.2–0.9 m |
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| SSE 9–17 kn | 26 kn | 0.3–0.9 m |
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| WSW 9–31 kn | 42 kn | 1.4–1.7 m |
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| W 16–26 kn | 33 kn | 1.4–2.3 m |
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Forecast from the NOAA GFS model run , waves from ECMWF WAM. Updated with each model cycle; the live chart below recalculates for your departure time and vessel.
Frequently asked
How far is it from Cherbourg-en-Cotentin to Les Sables-d'Olonne by sea?
The water route is 397 nm (736 km), computed on WXMarine's maritime routing network. The same distance applies on the return passage from Les Sables-d'Olonne to Cherbourg-en-Cotentin.
How long does the passage from Cherbourg-en-Cotentin to Les Sables-d'Olonne take?
about 40 hours at a 10 kn cruise. Scale by your own speed: at half the speed it takes about twice as long. The planner on this page recalculates for your vessel and live weather.
What is the weather between Cherbourg-en-Cotentin and Les Sables-d'Olonne today?
Along the route today, per the NOAA GFS run 2026-11-02 06z: NE wind 9–25 kn, waves 0.6–2.1 m. The day-by-day table on this page covers the next 10 days.