Saint Sampson (GGSTS) — marine weather & port guide
Saint Sampson is a port in Guernsey at 49°29.0′N 2°31.0′W. Today (Aug 3): S wind 1–4 kn, waves 0.6–0.8 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 | 49°29.0′N 2°31.0′W |
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| UN/LOCODE | GGSTS |
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| Harbor size | Very small |
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| Harbor type | Coastal breakwater harbor |
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| Shelter | Fair |
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| Anchorage depth | 13 m |
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| Tide range | 8 m |
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| Pilotage | Compulsory |
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| Time zone | Europe/Guernsey |
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10-day marine forecast — Saint Sampson
| Date | Wind | Gusts | Waves |
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| S 1–4 kn | 5 kn | 0.6–0.8 m |
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| SW 8–15 kn | 19 kn | 0.6–1.1 m |
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| WSW 15–21 kn | 28 kn | 1.2–1.6 m |
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| WNW 12–16 kn | 22 kn | 0.8–1.3 m |
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| NW 5–9 kn | 13 kn | 0.3–0.7 m |
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| ESE 3–7 kn | 9 kn | 0.2–0.3 m |
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| WSW 10–14 kn | 18 kn | 0.3–0.7 m |
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| WNW 10–10 kn | 17 kn | 0.7–0.7 m |
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| E 11–11 kn | 15 kn | 0.5–0.5 m |
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| ENE 8–8 kn | 11 kn | 0.4–0.4 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 is the weather at Saint Sampson right now?
As of the ECMWF IFS run 2026-08-03 12z: S wind 1–4 kn, waves 0.6–0.8 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 Saint Sampson?
Saint Sampson is classed as a very small harbor (coastal breakwater harbor), with fair shelter in the NGA World Port Index.
How deep is the approach to Saint Sampson?
Per the NGA World Port Index, anchorage depths run about 13 m. Verify against current official charts before entry.
What restricts entry to Saint Sampson?
Entry is affected by tidal windows. Check the live forecast on this page and official notices before approach.