Onomichi-Itozaki marine weather forecast
Onomichi-Itozaki (JPONX) is a port in Japan at 34°23.0′N 133°10.0′E. Today (Nov 3): N wind 5–8 kn, waves 0.3–0.5 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 | 34°23.0′N 133°10.0′E |
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| UN/LOCODE | JPONX |
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| Harbor size | Large |
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| Harbor type | Coastal natural harbor |
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| Shelter | Good |
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| Channel depth | 9 m |
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| Anchorage depth | 9 m |
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| Tide range | 3 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, water, provisions |
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| Repairs | Limited |
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| Medical facilities | Available |
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10-day marine forecast — Onomichi-Itozaki
| Date | Wind | Gusts | Waves |
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| N 5–8 kn | 19 kn | 0.3–0.5 m |
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| E 3–6 kn | 15 kn | 0.4–0.8 m |
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| SE 2–9 kn | 21 kn | 0.3–0.6 m |
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| NW 6–10 kn | 23 kn | 0.6–0.7 m |
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| NNW 3–9 kn | 12 kn | 0.2–0.7 m |
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| NNE 2–4 kn | 5 kn | 0.2–0.4 m |
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| NNW 5–5 kn | 7 kn | 0.2–0.2 m |
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| WNW 6–6 kn | 14 kn | 0.4–0.4 m |
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| N 6–6 kn | 22 kn | 0.6–0.6 m |
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| NW 1–1 kn | 6 kn | 0.2–0.2 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 10 kn on Nov 6. The highest modeled significant wave height is 0.8 m on Nov 4. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at Onomichi-Itozaki right now?
As of the ECMWF IFS run 2026-11-03 00z: N wind 5–8 kn, waves 0.3–0.5 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 Onomichi-Itozaki?
Onomichi-Itozaki is classed as a large harbor (coastal natural harbor), with good shelter in the NGA World Port Index.
How deep is the approach to Onomichi-Itozaki?
Per the NGA World Port Index, the entrance channel carries about 9 m and anchorage depths run about 9 m. Verify against current official charts before entry.
What restricts entry to Onomichi-Itozaki?
Entry is affected by overhead clearance limits. Check the live forecast on this page and official notices before approach.