Cherbourg-en-Cotentin to Plymouth — sea route & marine weather
The sea route from Cherbourg-en-Cotentin (FRCER) to Plymouth (GBPLY) is about 114 nm — about 11 hours at 10 kn. Along the route today (Aug 3): S wind 1–11 kn, waves 0.4–0.8 m. The baseline track is drawn on the chart; Calculate replans it for your vessel and live weather.
Passage facts| Sea-route distance | 114 nm |
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| Passage time at 10 kn | about 11 hours |
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| Great-circle distance | 108 nm |
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| Cherbourg-en-Cotentin | 49°38.0′N 1°37.0′W |
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| Plymouth | 50°22.0′N 4°9.0′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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| S 1–11 kn | 13 kn | 0.4–0.8 m |
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| SW 8–17 kn | 24 kn | 0.6–1.3 m |
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| WSW 14–21 kn | 28 kn | 0.8–1.6 m |
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| WNW 9–16 kn | 22 kn | 0.4–1.3 m |
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| NW 4–9 kn | 13 kn | 0.2–0.7 m |
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| ESE 3–11 kn | 14 kn | 0.2–0.5 m |
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| WSW 10–14 kn | 18 kn | 0.3–0.7 m |
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| WNW 7–10 kn | 17 kn | 0.4–0.7 m |
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| E 11–14 kn | 18 kn | 0.5–0.6 m |
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| ENE 6–8 kn | 11 kn | 0.2–0.4 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 Cherbourg-en-Cotentin to Plymouth by sea?
The water route is 114 nm (211 km), computed on WXMarine's maritime routing network. The same distance applies on the return passage from Plymouth to Cherbourg-en-Cotentin.
How long does the passage from Cherbourg-en-Cotentin to Plymouth take?
about 11 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 Plymouth today?
Along the route today, per the ECMWF IFS run 2026-08-03 12z: S wind 1–11 kn, waves 0.4–0.8 m. The day-by-day table on this page covers the next 10 days.