Seaham marine weather forecast
Seaham (GBSEA) is a port in United Kingdom at 54°50.0′N 1°19.0′W. Today (Sep 16): SW wind 11–15 kn, waves 1.3–1.4 m, from the NOAA GFS run 2026-09-16 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 | 54°50.0′N 1°19.0′W |
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| UN/LOCODE | GBSEA |
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| Harbor size | Small |
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| Harbor type | Coastal tide-gate harbor |
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| Shelter | Good |
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| Channel depth | 2 m |
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| Anchorage depth | 13 m |
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| Tide range | 3 m |
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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 | Moderate |
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| Medical facilities | Available |
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10-day marine forecast — Seaham
| Date | Wind | Gusts | Waves |
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| SW 11–15 kn | 28 kn | 1.3–1.4 m |
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| WSW 13–20 kn | 30 kn | 1.3–1.6 m |
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| WSW 14–16 kn | 30 kn | 1.1–1.5 m |
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| WSW 17–20 kn | 32 kn | 1.1–1.5 m |
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| W 10–15 kn | 29 kn | 1.2–1.8 m |
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| W 8–8 kn | 19 kn | 1.4–1.6 m |
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| SW 2–2 kn | 2 kn | 0.9–1.0 m |
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| NE 5–5 kn | 12 kn | 0.6–0.6 m |
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| SW 4–4 kn | 3 kn | 0.7–0.7 m |
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| SW 5–5 kn | 4 kn | 1.0–1.0 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 20 kn on Sep 19. The highest modeled significant wave height is 1.8 m on Sep 20. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at Seaham right now?
As of the NOAA GFS run 2026-09-16 18z: SW wind 11–15 kn, waves 1.3–1.4 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 Seaham?
Seaham is classed as a small harbor (coastal tide-gate harbor), with good shelter in the NGA World Port Index.
How deep is the approach to Seaham?
Per the NGA World Port Index, the entrance channel carries about 2 m and anchorage depths run about 13 m. Verify against current official charts before entry.
What restricts entry to Seaham?
Entry is affected by tidal windows, overhead clearance limits. Check the live forecast on this page and official notices before approach.