A westerly, strong and mostly variable flow prevails over the whole area.
For Pornichet :
Warning fresh gale offshore.
The reliability of the situation is assessed at 80%.
Overcast skies with storms likely in the morning, storms in early afternoon. Lots of hail showers. In the evening, cloudy spells, sometimes dense.
Chance of light rain. SSW force 6 in the morning turning WSW force 5 in the evening. Gusts reaching 45 knots in the middle of the day. Moderate sea. Low, fairly long swell from SSE then moderate in the evening. Excellent visibility.