For Île de Sein :
Warning strong gale.
We are 80% sure of the situation, because the winds may be stronger than forecast.
Very cloudy skies to overcast. Showers all day. In the evening, overcast skies.
Showers. S force 9 turning SW in the middle of the day then becoming force 8. Gusts reaching 63 knots in the middle of the day. High sea temporarily very high in the middle of the day. High, long swell from W. Excellent visibility.