Ulsan marine weather forecast
Ulsan (KRUSN) is a port in South Korea at 35°27.0′N 129°24.0′E. Today (Sep 14): NNE wind 10–14 kn, waves 0.6–0.9 m, from the ECMWF IFS run 2026-09-14 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 | 35°27.0′N 129°24.0′E |
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| UN/LOCODE | KRUSN |
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| Harbor size | Medium |
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| Harbor type | River natural harbor |
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| Shelter | Excellent |
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| Channel depth | 19 m |
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| Anchorage depth | 23 m |
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| Tide range | 1 m |
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| Pilotage | Compulsory |
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| Time zone | Asia/Seoul |
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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 | 17 m draft |
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10-day marine forecast — Ulsan
| Date | Wind | Gusts | Waves |
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| NNE 10–14 kn | 20 kn | 0.6–0.9 m |
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| NE 11–18 kn | 24 kn | 0.8–1.5 m |
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| NE 20–23 kn | 31 kn | 1.8–2.1 m |
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| ENE 20–23 kn | 31 kn | 2.2–2.6 m |
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| NE 16–20 kn | 26 kn | 1.7–2.0 m |
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| NE 17–20 kn | 24 kn | 1.6–1.8 m |
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| NE 18–21 kn | 26 kn | 1.7–1.9 m |
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| NNE 28–28 kn | 41 kn | 3.1–3.1 m |
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| NNE 18–18 kn | 31 kn | 2.5–2.5 m |
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| NE 20–20 kn | 26 kn | 1.8–1.8 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 28 kn on Sep 21. The highest modeled significant wave height is 3.1 m on Sep 21. Compare the dated model run with official forecasts and warnings before departure.
Frequently asked
How is the weather at Ulsan right now?
As of the ECMWF IFS run 2026-09-14 12z: NNE wind 10–14 kn, waves 0.6–0.9 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 Ulsan?
Ulsan is classed as a medium harbor (river natural harbor), with excellent shelter in the NGA World Port Index.
How deep is the approach to Ulsan?
Per the NGA World Port Index, the entrance channel carries about 19 m and anchorage depths run about 23 m. Verify against current official charts before entry.
What restricts entry to Ulsan?
Entry is affected by heavy swell, overhead clearance limits. Check the live forecast on this page and official notices before approach.
What is the largest vessel Ulsan can take?
The NGA World Port Index lists the maximum vessel at about 17 m draft. Confirm current limits with the port authority before arrival.