For Trevou-Treguignec :
No gale warning.
For the night from Tuesday to Wednesday W force 2 in the early part of the night becoming WNW force 1. Gusts reaching 17 knots in the early part of the night.
Slight sea. Low, long swell from WNW. Good visibility becoming poor in the middle of the night. Daytime of Wednesday 23 september : The sky will remain changeable.
Cloud and long sunny periods. Risk of showers in the morning, possibility of showers in the afternoon. In the evening, lots of good clear periods.
Light showers. N force 1 turning ENE force 2 in the middle of the day then NE. Gusts reaching 14 knots in the morning. Slight sea becoming moderate in the evening. Low, long swell from WNW. Poor visibility becoming excellent in the middle of the day then excellent.