A northerly, weak and particularly variable flow prevails over the whole area.
For Trevou-Treguignec :
No gale warning.
For the night from Thursday to Friday NNW wind force 2 continuing all night. Gusts reaching 12 knots in the early part of the night.
Slight sea. Low, short swell from WNW. Good visibility becoming good in the middle of the night then good. Daytime of Friday 21 august : The sky will remain changeable.
Good clear periods alternating with cloudy spells, sometimes more dense in the afternoon. Risk of some spots of rain in the morning, showers late in the day. In the evening, cloud and long sunny periods.
Light showers progressively becoming less frequent. N force 2 in the morning becoming NNE force 3 in the middle of the day. Gusts reaching 13 knots in the evening. Slight sea. Low, short swell from WNW. Good visibility becoming excellent in the middle of the day then good.