Southern France Under Orange Alert for Coastal Wave Submersion

Orange Vigilance Issued for Coastal Areas

Météo-France has placed several coastal areas in Southern France under an orange vigilance alert for 'vagues-submersion' (coastal wave submersion). The alert, which became active from 6 AM on Friday, February 6, 2026, specifically targets the Alpes-Maritimes (06) and Corse-du-Sud (2A) departments, and is expected to persist at least until noon on Friday.

This heightened alert signifies a marked risk of coastal inundation due to a combination of meteorological factors.

Expected Conditions and Causes

The orange vigilance is attributed to strong south-westerly winds intensifying over the western Mediterranean basin, which are generating a long swell. These conditions, coupled with atmospheric pressure and sea state, are leading to a significant temporary elevation of the sea level, known as a 'surcote'. Forecasters anticipate waves reaching approximately 3 meters along the affected coastlines. Strong onshore winds and elevated tidal coefficients are further exacerbating the risk of wave run-up during high tide.

Potential Impacts and Safety Recommendations

The combination of these phenomena presents a considerable risk of submersion by 'paquets de mer' (overtopping waves) on the western littoral of Southern Corsica and the Alpes-Maritimes coastline. Expected impacts include:

• Temporary inundation of promenades and quays
• Short-term transport disruption
• Port and marina closures
• Localized utility outages

Local authorities have advised the public to exercise extreme caution. Recommendations include restricting access to coastal promenades, quays, and ports, particularly in cities such as Nice and Cannes. Municipal services have also suggested precautionary closures of waterfront infrastructure. Météo-France urges residents and visitors to stay informed about the evolving situation, avoid approaching the coast, and take measures to protect any exposed property.

Broader Weather Context

In addition to the coastal wave submersion alert, Météo-France has also maintained orange vigilance for river flooding ('crues') in the Finistère (29) and Gironde (33) departments on the Atlantic coast. This is due to a combination of high tides and significant river flows. The overall weather pattern across France on Friday, February 6, 2026, includes intermittent rain, particularly in the northern half of the country, though conditions are generally improving.