Dartmouth (GBDTM) — marine weather & port guide
Dartmouth is a port in United Kingdom at 50°21.0′N 3°35.0′W. Today (Aug 3): S wind 6–11 kn, waves 0.4–0.4 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 | 50°21.0′N 3°35.0′W |
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| UN/LOCODE | GBDTM |
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| Harbor size | Small |
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| Harbor type | River natural harbor |
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| Shelter | Excellent |
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| Channel depth | 6 m |
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| Anchorage depth | 9 m |
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| Tide range | 4 m |
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| Pilotage | Compulsory |
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| Time zone | Europe/London |
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10-day marine forecast — Dartmouth
| Date | Wind | Gusts | Waves |
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| S 6–11 kn | 13 kn | 0.4–0.4 m |
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| SW 12–17 kn | 24 kn | 0.6–1.3 m |
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| WNW 14–17 kn | 24 kn | 0.8–1.1 m |
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| WNW 9–13 kn | 18 kn | 0.4–0.7 m |
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| WNW 4–7 kn | 9 kn | 0.2–0.3 m |
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| ESE 7–11 kn | 14 kn | 0.2–0.5 m |
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| WNW 12–12 kn | 15 kn | 0.5–0.6 m |
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| WNW 7–7 kn | 15 kn | 0.4–0.4 m |
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| ESE 14–14 kn | 18 kn | 0.6–0.6 m |
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| SW 6–6 kn | 7 kn | 0.2–0.2 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 Dartmouth right now?
As of the ECMWF IFS run 2026-08-03 12z: S wind 6–11 kn, waves 0.4–0.4 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 Dartmouth?
Dartmouth is classed as a small harbor (river natural harbor), with excellent shelter in the NGA World Port Index.
How deep is the approach to Dartmouth?
Per the NGA World Port Index, the entrance channel carries about 6 m and anchorage depths run about 9 m. Verify against current official charts before entry.