Naha Ko marine weather forecast
Naha Ko (JPNAH) is a port in Japan at 26°13.0′N 127°41.0′E. Today (Nov 2): NNE wind 19–19 kn, waves 1.7–2.2 m, from the NOAA GFS run 2026-11-02 18z. The live chart on this page shows current conditions and plans weather-optimized departures from this harbor.
Port facts (NGA World Port Index)| Position | 26°13.0′N 127°41.0′E |
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| UN/LOCODE | JPNAH |
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| Harbor size | Small |
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| Harbor type | Coastal breakwater harbor |
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| Shelter | Good |
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| Channel depth | 13 m |
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| Anchorage depth | 13 m |
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| Tide range | 2 m |
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| Pilotage | Compulsory |
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| Time zone | Asia/Tokyo |
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Facilities & services (NGA World Port Index)| Tugs | Assistance available |
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| Supplies | Fuel oil, water |
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| Repairs | Limited |
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| Medical facilities | Available |
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10-day marine forecast — Naha Ko
| Date | Wind | Gusts | Waves |
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| NNE 19–19 kn | 19 kn | 1.7–2.2 m |
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| NE 16–18 kn | 18 kn | 2.0–2.3 m |
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| ENE 5–12 kn | 12 kn | 2.2–2.4 m |
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| NNW 6–14 kn | 13 kn | 1.8–2.2 m |
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| NNE 16–20 kn | 19 kn | 1.7–2.4 m |
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| ENE 20–20 kn | 20 kn | 2.5–3.7 m |
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| ENE 15–15 kn | 16 kn | 2.3–2.8 m |
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| NNE 27–27 kn | 27 kn | 2.4–2.4 m |
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| NE 20–20 kn | 21 kn | 2.8–2.8 m |
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| NE 17–17 kn | 18 kn | 2.5–2.5 m |
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Forecast from the NOAA GFS 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 27 kn on Nov 9. The highest modeled significant wave height is 3.7 m on Nov 7. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at Naha Ko right now?
As of the NOAA GFS run 2026-11-02 18z: NNE wind 19–19 kn, waves 1.7–2.2 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 Naha Ko?
Naha Ko is classed as a small harbor (coastal breakwater harbor), with good shelter in the NGA World Port Index.
How deep is the approach to Naha Ko?
Per the NGA World Port Index, the entrance channel carries about 13 m and anchorage depths run about 13 m. Verify against current official charts before entry.