A northerly and moderate flow prevails over the West and the North of the basin. Over the South-East, it is westerly, weak and mostly variable.
For Porsay :
No gale warning.
The reliability of the situation is very good.
Some fair-weather cumulus clouds. In the evening, skies with few clouds.
N force 2 in the middle of the day turning E force 1 in the evening. Gusts reaching 11 knots in the middle of the day. Smooth to slight sea. Low, short swell from NE. Excellent visibility.