Seaham (GBSEA) — marine weather & port guide
Seaham is a port in United Kingdom at 54°50.0′N 1°19.0′W. Today (Aug 3): ESE wind 10–13 kn, waves 0.9–1.2 m, from the ECMWF IFS run 2026-08-03 12z. 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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10-day marine forecast — Seaham
| Date | Wind | Gusts | Waves |
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| ESE 10–13 kn | 25 kn | 0.9–1.2 m |
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| SSE 8–10 kn | 23 kn | 0.9–1.3 m |
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| SW 11–21 kn | 39 kn | 0.8–2.0 m |
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| WNW 8–16 kn | 30 kn | 1.8–2.0 m |
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| WSW 4–10 kn | 12 kn | 1.1–1.6 m |
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| SSW 5–10 kn | 13 kn | 0.7–0.9 m |
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| SW 9–13 kn | 16 kn | 0.7–1.0 m |
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| WSW 13–13 kn | 24 kn | 1.0–1.0 m |
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| SSW 6–6 kn | 14 kn | 0.5–0.5 m |
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| SW 9–9 kn | 19 kn | 0.7–0.7 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 is the weather at Seaham right now?
As of the ECMWF IFS run 2026-08-03 12z: ESE wind 10–13 kn, waves 0.9–1.2 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.