Le Havre to Les Sables-d'Olonne — sea route & marine weather
The sea route from Le Havre (FRLEH) to Les Sables-d'Olonne (FRLSO) is about 463 nm — about 46 hours at 10 kn. Along the route today (Aug 3): NE wind 1–15 kn, waves 0.6–0.8 m. The baseline track is drawn on the chart; Calculate replans it for your vessel and live weather.
Passage facts| Sea-route distance | 463 nm |
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| Passage time at 10 kn | about 46 hours |
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| Great-circle distance | 195 nm |
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| Le Havre | 49°30.0′N 0°6.0′E |
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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 1–15 kn | 19 kn | 0.6–0.8 m |
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| W 1–15 kn | 20 kn | 0.4–1.1 m |
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| WSW 8–21 kn | 28 kn | 0.9–1.7 m |
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| W 6–17 kn | 23 kn | 0.6–1.6 m |
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| WNW 5–15 kn | 20 kn | 0.3–1.1 m |
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| SW 1–9 kn | 11 kn | 0.2–0.6 m |
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| WSW 2–14 kn | 18 kn | 0.2–0.7 m |
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| W 6–13 kn | 19 kn | 0.7–1.4 m |
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| ENE 2–11 kn | 18 kn | 0.4–1.2 m |
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| ENE 7–10 kn | 14 kn | 0.3–0.7 m |
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Forecast from the ECMWF IFS 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 Le Havre to Les Sables-d'Olonne by sea?
The water route is 463 nm (858 km), computed on WXMarine's maritime routing network. The same distance applies on the return passage from Les Sables-d'Olonne to Le Havre.
How long does the passage from Le Havre to Les Sables-d'Olonne take?
about 46 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 Le Havre and Les Sables-d'Olonne today?
Along the route today, per the ECMWF IFS run 2026-08-03 12z: NE wind 1–15 kn, waves 0.6–0.8 m. The day-by-day table on this page covers the next 10 days.