Grand Cul De Sac Bay marine weather forecast
Grand Cul De Sac Bay (LCCDS) is a port in St. Lucia at 13°59.0′N 61°1.0′W. Today (Sep 18): E wind 11–15 kn, waves 1.2–1.4 m, from the ECMWF IFS run 2026-09-18 00z. The live chart on this page shows current conditions and plans weather-optimized departures from this harbor.
Port facts (NGA World Port Index)| Position | 13°59.0′N 61°1.0′W |
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| UN/LOCODE | LCCDS |
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| Harbor size | Small |
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| Harbor type | Coastal natural harbor |
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| Shelter | Good |
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| Channel depth | 23 m |
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| Tide range | 0 m |
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| Pilotage | Compulsory |
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| Time zone | America/St_Vincent |
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Facilities & services (NGA World Port Index)| Tugs | Assistance available |
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| Supplies | Provisions |
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| Repairs | None |
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| Medical facilities | Available |
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10-day marine forecast — Grand Cul De Sac Bay
| Date | Wind | Gusts | Waves |
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| E 11–15 kn | 19 kn | 1.2–1.4 m |
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| ESE 8–12 kn | 15 kn | 1.0–1.1 m |
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| ESE 8–10 kn | 13 kn | 0.9–1.0 m |
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| ESE 9–11 kn | 14 kn | 0.9–0.9 m |
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| E 11–14 kn | 18 kn | 0.9–1.2 m |
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| ENE 14–15 kn | 19 kn | 1.2–1.3 m |
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| ENE 15–15 kn | 19 kn | 1.5–1.5 m |
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| ENE 18–18 kn | 23 kn | 1.7–1.7 m |
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| ENE 16–16 kn | 20 kn | 1.6–1.6 m |
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| ENE 13–13 kn | 17 kn | 1.3–1.3 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.
What to watch in the forecast
Across the loaded 10-day outlook, the strongest daily modeled wind reaches 18 kn on Sep 25. The highest modeled significant wave height is 1.7 m on Sep 25. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at Grand Cul De Sac Bay right now?
As of the ECMWF IFS run 2026-09-18 00z: E wind 11–15 kn, waves 1.2–1.4 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 Grand Cul De Sac Bay?
Grand Cul De Sac Bay is classed as a small harbor (coastal natural harbor), with good shelter in the NGA World Port Index.
How deep is the approach to Grand Cul De Sac Bay?
Per the NGA World Port Index, the entrance channel carries about 23 m. Verify against current official charts before entry.