Hososhima Ko (JPHSM) — marine weather & port guide
Hososhima Ko is a port in Japan at 32°26.0′N 131°40.0′E. Today (Aug 3): ENE wind 14–16 kn, waves 1.9–2.4 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 | 32°26.0′N 131°40.0′E |
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| UN/LOCODE | JPHSM |
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| Harbor size | Very small |
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| Harbor type | Coastal breakwater harbor |
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| Shelter | Fair |
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| Channel depth | 9 m |
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| Anchorage depth | 14 m |
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| Tide range | 2 m |
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| Time zone | Asia/Tokyo |
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10-day marine forecast — Hososhima Ko
| Date | Wind | Gusts | Waves |
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| ENE 14–16 kn | 23 kn | 1.9–2.4 m |
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| ENE 16–19 kn | 25 kn | 2.6–3.8 m |
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| ENE 23–26 kn | 34 kn | 4.2–5.5 m |
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| E 25–29 kn | 38 kn | 5.2–5.7 m |
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| ESE 18–25 kn | 33 kn | 3.9–4.8 m |
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| ESE 16–20 kn | 26 kn | 2.9–3.4 m |
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| ESE 9–13 kn | 16 kn | 2.3–2.5 m |
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| SE 11–11 kn | 14 kn | 2.2–2.2 m |
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| SSE 7–7 kn | 16 kn | 2.2–2.2 m |
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| ESE 10–10 kn | 15 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 Hososhima Ko right now?
As of the ECMWF IFS run 2026-08-03 12z: ENE wind 14–16 kn, waves 1.9–2.4 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 Hososhima Ko?
Hososhima Ko is classed as a very small harbor (coastal breakwater harbor), with fair shelter in the NGA World Port Index.
How deep is the approach to Hososhima Ko?
Per the NGA World Port Index, the entrance channel carries about 9 m and anchorage depths run about 14 m. Verify against current official charts before entry.
What restricts entry to Hososhima Ko?
Entry is affected by heavy swell. Check the live forecast on this page and official notices before approach.