London marine weather forecast
London (GBLON) is a port in United Kingdom at 51°30.0′N 0°5.0′W. Today (Sep 13): W wind 2–4 kn, waves 1.0–1.1 m, from the NOAA GFS run 2026-09-13 18z. The live chart on this page shows current conditions and plans weather-optimized departures from this harbor.
Port facts (NGA World Port Index)| Position | 51°30.0′N 0°5.0′W |
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| UN/LOCODE | GBLON |
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| Harbor size | Large |
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| Harbor type | River basin harbor |
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| Shelter | Excellent |
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| Channel depth | 8 m |
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| Anchorage depth | 14 m |
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| Tide range | 6 m |
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| Pilotage | Compulsory |
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| Time zone | Europe/London |
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Facilities & services (NGA World Port Index)| Tugs | Assistance available |
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| Supplies | Fuel oil, diesel, water, provisions |
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| Repairs | Major (hull, machinery, electrical) |
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| Medical facilities | Available |
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10-day marine forecast — London
| Date | Wind | Gusts | Waves |
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| W 2–4 kn | 7 kn | 1.0–1.1 m |
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| WSW 5–12 kn | 20 kn | 0.6–0.9 m |
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| WSW 10–16 kn | 27 kn | 0.5–1.2 m |
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| WNW 9–10 kn | 20 kn | 1.0–1.3 m |
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| WSW 9–11 kn | 25 kn | 1.2–2.2 m |
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| SW 9–9 kn | 17 kn | 1.7–1.8 m |
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| WNW 7–7 kn | 15 kn | 1.7–2.1 m |
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| NNW 3–3 kn | 4 kn | 0.8–0.8 m |
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| WSW 11–11 kn | 21 kn | 0.7–0.7 m |
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| ENE 6–6 kn | 11 kn | 0.5–0.5 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.
What to watch in the forecast
Across the loaded 10-day outlook, the strongest daily modeled wind reaches 16 kn on Sep 15. The highest modeled significant wave height is 2.2 m on Sep 17. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at London right now?
As of the NOAA GFS run 2026-09-13 18z: W wind 2–4 kn, waves 1.0–1.1 m. The 10-day outlook is in the forecast table on this page and updates with each model cycle.
How big is the harbor at London?
London is classed as a large harbor (river basin harbor), with excellent shelter in the NGA World Port Index.
How deep is the approach to London?
Per the NGA World Port Index, the entrance channel carries about 8 m and anchorage depths run about 14 m. Verify against current official charts before entry.
What restricts entry to London?
Entry is affected by tidal windows, overhead clearance limits. Check the live forecast on this page and official notices before approach.