Overview
- The orange waves‑submersion alert runs from 03:00 to 11:00 on Saturday, December 6, for the three northwest departments.
- Strong southwest winds over the Bay of Biscay and the English Channel will drive large waves, with a temporary sea‑level rise compounding the hazard.
- Very high tidal coefficients of 98 in the morning and 97 in the evening elevate the likelihood of coastal submersions, especially around high tides.
- The maritime prefecture has issued wind advisories of Beaufort force 7–8 from Friday afternoon to Saturday evening, followed by force 6–7 from Sunday evening into Monday morning.
- Authorities urge sea users to check forecasts and tide times, avoid going out alone, carry communications, stay near a refuge point, and call 196 for maritime emergencies.