Le Havre to Boulogne-sur-Mer — sea route & marine weather
The sea route from Le Havre (FRLEH) to Boulogne-sur-Mer (FRBOL) is about 101 nm — about 10 hours at 10 kn. Along the route today (Nov 1): NE wind 5–14 kn, waves 0.7–0.8 m. The baseline track is drawn on the chart; Calculate replans it for your vessel and live weather.
Passage facts| Sea-route distance | 101 nm |
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| Passage time at 10 kn | about 10 hours |
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| Great-circle distance | 94 nm |
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| Le Havre | 49°30.0′N 0°6.0′E |
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| Boulogne-sur-Mer | 50°43.0′N 1°37.0′E |
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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 5–14 kn | 14 kn | 0.7–0.8 m |
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| NNE 5–27 kn | 29 kn | 0.9–2.2 m |
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| NE 9–27 kn | 28 kn | 1.5–2.1 m |
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| ENE 13–26 kn | 29 kn | 1.9–2.0 m |
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| ENE 7–18 kn | 19 kn | 1.0–1.8 m |
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| SSE 3–4 kn | 3 kn | 0.5–0.8 m |
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| WSW 5–11 kn | 12 kn | 0.3–0.5 m |
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| SE 7–17 kn | 18 kn | 0.4–0.4 m |
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| SSE 18–27 kn | 39 kn | 1.0–1.0 m |
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| W 21–28 kn | 32 kn | 1.4–1.4 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 Le Havre to Boulogne-sur-Mer by sea?
The water route is 101 nm (187 km), computed on WXMarine's maritime routing network. The same distance applies on the return passage from Boulogne-sur-Mer to Le Havre.
How long does the passage from Le Havre to Boulogne-sur-Mer take?
about 10 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 Boulogne-sur-Mer today?
Along the route today, per the NOAA GFS run 2026-11-01 18z: NE wind 5–14 kn, waves 0.7–0.8 m. The day-by-day table on this page covers the next 10 days.