Tsuruga Ko marine weather forecast
Tsuruga Ko (JPTRG) is a port in Japan at 35°39.0′N 136°4.0′E. Today (Sep 17): ENE wind 15–16 kn, waves 1.4–1.9 m, from the NOAA GFS run 2026-09-17 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 | 35°39.0′N 136°4.0′E |
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| UN/LOCODE | JPTRG |
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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 | 15 m |
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| Anchorage depth | 20 m |
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| Tide range | 0 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 | Limited |
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| Medical facilities | Available |
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| Largest vessel | 54 m beam, 11 m draft |
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10-day marine forecast — Tsuruga Ko
| Date | Wind | Gusts | Waves |
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| ENE 15–16 kn | 15 kn | 1.4–1.9 m |
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| NE 7–16 kn | 16 kn | 1.2–1.5 m |
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| NE 9–13 kn | 13 kn | 1.0–1.2 m |
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| NNE 23–25 kn | 27 kn | 1.0–2.7 m |
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| NNE 17–24 kn | 27 kn | 2.4–3.2 m |
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| NE 13–13 kn | 13 kn | 1.8–2.3 m |
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| NE 6–6 kn | 5 kn | 0.7–1.1 m |
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| ENE 5–5 kn | 5 kn | 2.0–2.0 m |
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| E 6–6 kn | 5 kn | 0.9–0.9 m |
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| N 17–17 kn | 17 kn | 0.9–0.9 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 25 kn on Sep 20. The highest modeled significant wave height is 3.2 m on Sep 21. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at Tsuruga Ko right now?
As of the NOAA GFS run 2026-09-17 18z: ENE wind 15–16 kn, waves 1.4–1.9 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 Tsuruga Ko?
Tsuruga 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 Tsuruga Ko?
Per the NGA World Port Index, the entrance channel carries about 15 m and anchorage depths run about 20 m. Verify against current official charts before entry.
What restricts entry to Tsuruga Ko?
Entry is affected by tidal windows, heavy swell. Check the live forecast on this page and official notices before approach.
What is the largest vessel Tsuruga Ko can take?
The NGA World Port Index lists the maximum vessel at about 54 m beam, 11 m draft. Confirm current limits with the port authority before arrival.