A westerly, strong and mostly variable flow prevails over the whole area.
For Pen Guen, Saint-Cast :
No gale warning.
The reliability of the situation is assessed at 85%.
In the evening, lots of good clear periods.
Chance of light rain. WSW wind force 5. Gusts reaching 25 knots in the evening. Moderate sea. Low, fairly long swell from WNW. Excellent visibility.