For Trevou-Treguignec :
No gale warning.
For the night from Sunday to Monday NE wind force 2 continuing all night. Gusts reaching 15 knots in the early part of the night.
Slight sea. Low, fairly long swell from WNW then from N in the middle of the night. Excellent visibility becoming good in the middle of the night then good. Daytime of Monday 21 september : The weather will be good.
Sunny becoming changeable in the afternoon. No precipitation. In the evening, cloud and long sunny periods.
Chance of light rain. NE force 2 becoming NNE force 1 in the middle of the day then N force 2. Gusts reaching 15 knots until the middle of the day. Slight sea becoming moderate in the middle of the day. Low, fairly long swell from WNW. Poor visibility becoming excellent in the middle of the day then excellent.