A southeasterly, moderate and very variable flow prevails over the whole area.
For Heist :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Clear skies. In the evening, hazy cloud giving way to increasingly brighter skies.
No precipitation. E wind force 2 from the middle of the day. Gusts reaching 9 knots in the evening. Smooth sea. Low, fairly long swell from NNW. Excellent visibility.