Port Arthur (USPOA) — marine weather & port guide
Port Arthur is a port in United States at 29°50.0′N 93°58.0′W. Today (Aug 3): WSW wind 1–4 kn, 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 | 29°50.0′N 93°58.0′W |
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| UN/LOCODE | USPOA |
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| Harbor size | Medium |
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| Harbor type | Lake or canal harbor |
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| Shelter | Good |
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| Channel depth | 11 m |
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| Anchorage depth | 11 m |
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| Tide range | 1 m |
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| Pilotage | Compulsory |
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| Time zone | America/Chicago |
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10-day marine forecast — Port Arthur
| Date | Wind | Gusts | Waves |
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| WSW 1–4 kn | 9 kn | — |
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| S 0–7 kn | 12 kn | — |
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| SSW 1–7 kn | 14 kn | — |
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| SSW 1–8 kn | 14 kn | — |
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| SSE 1–7 kn | 13 kn | — |
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| S 1–6 kn | 8 kn | — |
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| SE 5–6 kn | 8 kn | — |
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| SSE 2–2 kn | 7 kn | — |
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| SSW 4–4 kn | 11 kn | — |
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| S 4–4 kn | 8 kn | — |
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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 Port Arthur right now?
As of the ECMWF IFS run 2026-08-03 12z: WSW wind 1–4 kn. The 10-day outlook is in the forecast table on this page and updates with each model cycle.
How big is the harbor at Port Arthur?
Port Arthur is classed as a medium harbor (lake or canal harbor), with good shelter in the NGA World Port Index.
How deep is the approach to Port Arthur?
Per the NGA World Port Index, the entrance channel carries about 11 m and anchorage depths run about 11 m. Verify against current official charts before entry.
What restricts entry to Port Arthur?
Entry is affected by overhead clearance limits. Check the live forecast on this page and official notices before approach.