Liverpool to Portland Harbour — sea route & marine weather
The sea route from Liverpool (GBLIV) to Portland Harbour (GBPRH) is about 483 nm — about 2 days at 10 kn. Along the route today (Aug 3): SSE wind 1–19 kn, waves 0.5–1.4 m. The baseline track is drawn on the chart; Calculate replans it for your vessel and live weather.
Passage facts| Sea-route distance | 483 nm |
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| Passage time at 10 kn | about 2 days |
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| Great-circle distance | 172 nm |
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| Liverpool | 53°25.0′N 3°0.0′W |
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| Portland Harbour | 50°35.0′N 2°26.0′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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| SSE 1–19 kn | 25 kn | 0.5–1.4 m |
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| S 4–18 kn | 26 kn | 0.5–1.6 m |
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| WSW 8–21 kn | 30 kn | 1.1–2.0 m |
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| WNW 7–16 kn | 23 kn | 0.6–1.7 m |
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| SW 3–9 kn | 13 kn | 0.3–0.7 m |
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| W 1–18 kn | 23 kn | 0.2–1.4 m |
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| WSW 7–15 kn | 18 kn | 0.3–1.6 m |
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| W 6–10 kn | 20 kn | 0.7–1.5 m |
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| SE 5–15 kn | 19 kn | 0.3–1.0 m |
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| SW 4–8 kn | 13 kn | 0.4–1.1 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 Liverpool to Portland Harbour by sea?
The water route is 483 nm (894 km), computed on WXMarine's maritime routing network. The same distance applies on the return passage from Portland Harbour to Liverpool.
How long does the passage from Liverpool to Portland Harbour take?
about 2 days 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 Liverpool and Portland Harbour today?
Along the route today, per the ECMWF IFS run 2026-08-03 12z: SSE wind 1–19 kn, waves 0.5–1.4 m. The day-by-day table on this page covers the next 10 days.