Low 1008 hPa centered at 100 nautical miles in the West-South-West of the Île de Sein moving at 16 knots to the West-North-West to be centered at 140 nautical miles in the South-West of Fastnet Rock (South-West Ireland).
For Plage de Jullouville :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Fair weather with mostly clear skies. In the evening, relatively clear skies becoming changeable.
Chance of light rain. WNW force 3 turning NNW in the middle of the day then N. Gusts reaching 18 knots in the evening. Smooth sea. Low, short swell from WNW. Excellent visibility becoming excellent in the middle of the day.