For Trevou-Treguignec :
No gale warning.
For the night from Wednesday to Thursday N force 2 in the early part of the night becoming force 1. Gusts reaching 17 knots in the early part of the night.
Slight sea. Low, fairly long swell from WNW. Excellent visibility becoming good in the middle of the night then good. Daytime of Thursday 20 august : The unsettled weather will become more unpredictable in the second half of the day.
Good clear periods alternating with cloudy spells, sometimes dense. Risk of showers in the morning, light showers dying away progressively in the afternoon. In the evening, cloudy spells, sometimes dense.
Possibility of showers NW force 1 becoming force 2 in the middle of the day then force 3. Gusts reaching 16 knots in the evening. Slight sea. Low, fairly long swell from WNW. Good visibility becoming excellent in the middle of the day.