Isthmus Cove — marine weather & port guide
Isthmus Cove is a port in United States at 33°27.0′N 118°30.0′W. Today (Aug 3): WSW wind 0–5 kn, waves 2.0–2.1 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 | 33°27.0′N 118°30.0′W |
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| Harbor size | Very small |
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| Harbor type | Coastal natural harbor |
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| Shelter | Fair |
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| Tide range | 1 m |
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| Time zone | America/Los_Angeles |
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10-day marine forecast — Isthmus Cove
| Date | Wind | Gusts | Waves |
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| WSW 0–5 kn | 17 kn | 2.0–2.1 m |
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| NE 1–4 kn | 15 kn | 1.7–1.9 m |
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| ESE 0–4 kn | 15 kn | 1.3–1.6 m |
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| SE 1–5 kn | 15 kn | 1.1–1.2 m |
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| E 1–5 kn | 15 kn | 1.0–1.1 m |
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| NNE 1–4 kn | 5 kn | 1.1–1.2 m |
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| W 1–4 kn | 5 kn | 1.2–1.3 m |
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| NNE 1–1 kn | 5 kn | 1.6–1.6 m |
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| NE 1–1 kn | 5 kn | 1.6–1.6 m |
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| E 1–1 kn | 4 kn | 1.6–1.6 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 Isthmus Cove right now?
As of the ECMWF IFS run 2026-08-03 12z: WSW wind 0–5 kn, waves 2.0–2.1 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 Isthmus Cove?
Isthmus Cove is classed as a very small harbor (coastal natural harbor), with fair shelter in the NGA World Port Index.