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 (Sep 15): W wind 8–20 kn, waves 0.8–1.5 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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| W 8–20 kn | 26 kn | 0.8–1.5 m |
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| WNW 5–18 kn | 24 kn | 0.9–1.4 m |
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| WSW 7–24 kn | 33 kn | 1.3–2.3 m |
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| WSW 4–21 kn | 29 kn | 1.2–1.8 m |
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| WSW 9–23 kn | 30 kn | 1.9–2.1 m |
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| WSW 6–19 kn | 23 kn | 1.2–1.7 m |
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| WNW 2–9 kn | 11 kn | 0.5–0.8 m |
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| NW 1–5 kn | 8 kn | 0.3–0.3 m |
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| E 4–5 kn | 10 kn | 0.4–0.4 m |
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| ESE 5–9 kn | 15 kn | 0.6–0.6 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 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 ECMWF IFS run 2026-09-15 12z: W wind 8–20 kn, waves 0.8–1.5 m. The day-by-day table on this page covers the next 10 days.