Shimonoseki marine weather forecast
Shimonoseki (JPSHS) is a port in Japan at 33°56.0′N 130°56.0′E. Today (Sep 16): ENE wind 23–25 kn, waves 1.9–2.2 m, from the NOAA GFS run 2026-09-16 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 | 33°56.0′N 130°56.0′E |
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| UN/LOCODE | JPSHS |
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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 | 13 m |
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| Anchorage depth | 9 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, diesel, water, provisions |
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| Repairs | Major (hull, machinery, electrical) |
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| Medical facilities | Available |
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10-day marine forecast — Shimonoseki
| Date | Wind | Gusts | Waves |
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| ENE 23–25 kn | 25 kn | 1.9–2.2 m |
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| ENE 15–24 kn | 25 kn | 2.0–2.4 m |
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| NE 20–27 kn | 30 kn | 1.9–2.0 m |
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| NNE 21–22 kn | 22 kn | 1.8–2.2 m |
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| NNE 17–22 kn | 22 kn | 2.0–2.1 m |
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| NE 19–19 kn | 21 kn | 1.9–2.0 m |
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| ENE 17–17 kn | 16 kn | 2.1–2.1 m |
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| NE 9–9 kn | 8 kn | 0.8–0.8 m |
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| ENE 7–7 kn | 7 kn | 0.4–0.4 m |
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| S 9–9 kn | 11 kn | 0.6–0.6 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 Sep 18. The highest modeled significant wave height is 2.4 m on Sep 17. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at Shimonoseki right now?
As of the NOAA GFS run 2026-09-16 18z: ENE wind 23–25 kn, waves 1.9–2.2 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 Shimonoseki?
Shimonoseki is classed as a small harbor (coastal natural harbor), with good shelter in the NGA World Port Index.
How deep is the approach to Shimonoseki?
Per the NGA World Port Index, the entrance channel carries about 13 m and anchorage depths run about 9 m. Verify against current official charts before entry.
What restricts entry to Shimonoseki?
Entry is affected by tidal windows, heavy swell. Check the live forecast on this page and official notices before approach.