Saint-Nazaire (FRSNR) — marine weather & port guide
Saint-Nazaire is a port in France at 47°17.0′N 2°12.0′W. Today (Aug 3): SW wind 4–6 kn, waves 0.6–0.7 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 | 47°17.0′N 2°12.0′W |
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| UN/LOCODE | FRSNR |
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| Harbor size | Medium |
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| Harbor type | River tide-gate harbor |
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| Shelter | Excellent |
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| Channel depth | 13 m |
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| Anchorage depth | 19 m |
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| Tide range | 4 m |
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| Pilotage | Compulsory |
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| Time zone | Europe/Paris |
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10-day marine forecast — Saint-Nazaire
| Date | Wind | Gusts | Waves |
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| SW 4–6 kn | 16 kn | 0.6–0.7 m |
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| SW 3–12 kn | 25 kn | 0.7–1.1 m |
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| WNW 6–9 kn | 22 kn | 1.1–1.3 m |
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| NNW 4–9 kn | 18 kn | 1.2–1.3 m |
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| NE 2–5 kn | 9 kn | 0.6–1.1 m |
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| E 5–6 kn | 8 kn | 0.4–0.6 m |
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| WNW 3–7 kn | 9 kn | 0.5–0.7 m |
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| N 4–4 kn | 12 kn | 1.4–1.4 m |
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| ENE 5–5 kn | 15 kn | 1.2–1.2 m |
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| NW 2–2 kn | 9 kn | 0.7–0.7 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 Saint-Nazaire right now?
As of the ECMWF IFS run 2026-08-03 12z: SW wind 4–6 kn, waves 0.6–0.7 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 Saint-Nazaire?
Saint-Nazaire is classed as a medium harbor (river tide-gate harbor), with excellent shelter in the NGA World Port Index.
How deep is the approach to Saint-Nazaire?
Per the NGA World Port Index, the entrance channel carries about 13 m and anchorage depths run about 19 m. Verify against current official charts before entry.
What restricts entry to Saint-Nazaire?
Entry is affected by tidal windows. Check the live forecast on this page and official notices before approach.