Sakata Ko marine weather forecast
Sakata Ko (JPSKT) is a port in Japan at 38°56.0′N 139°49.0′E. Today (Nov 3): WNW wind 11–17 kn, waves 1.4–1.7 m, from the ECMWF IFS run 2026-11-03 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 | 38°56.0′N 139°49.0′E |
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| UN/LOCODE | JPSKT |
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| Harbor size | Small |
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| Harbor type | Coastal tide-gate harbor |
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| Shelter | Fair |
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| Channel depth | 9 m |
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| Anchorage depth | 23 m |
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| Tide range | 1 m |
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| Pilotage | Advisable |
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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, diesel, water, provisions |
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| Repairs | Moderate |
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| Medical facilities | Available |
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10-day marine forecast — Sakata Ko
| Date | Wind | Gusts | Waves |
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| WNW 11–17 kn | 23 kn | 1.4–1.7 m |
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| ENE 8–17 kn | 24 kn | 1.2–1.6 m |
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| SSE 10–19 kn | 26 kn | 0.5–1.1 m |
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| WNW 21–26 kn | 38 kn | 1.2–4.2 m |
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| WNW 29–33 kn | 41 kn | 5.3–6.0 m |
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| WNW 14–26 kn | 33 kn | 2.8–4.8 m |
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| NNW 13–13 kn | 16 kn | 1.8–1.8 m |
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| ESE 13–13 kn | 19 kn | 1.2–1.2 m |
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| NW 4–4 kn | 21 kn | 2.5–2.5 m |
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| W 12–12 kn | 19 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 33 kn on Nov 7. The highest modeled significant wave height is 6.0 m on Nov 7. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at Sakata Ko right now?
As of the ECMWF IFS run 2026-11-03 00z: WNW wind 11–17 kn, waves 1.4–1.7 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 Sakata Ko?
Sakata Ko is classed as a small harbor (coastal tide-gate harbor), with fair shelter in the NGA World Port Index.
How deep is the approach to Sakata Ko?
Per the NGA World Port Index, the entrance channel carries about 9 m and anchorage depths run about 23 m. Verify against current official charts before entry.
What restricts entry to Sakata Ko?
Entry is affected by heavy swell. Check the live forecast on this page and official notices before approach.