A northeasterly flow prevails over the South of the basin. Over the North, it is southwesterly, moderate and very variable.
For Vannes :
No gale warning.
The reliability of the situation is poor.
For the night from Wednesday to Thursday N wind force 2 continuing all night. Gusts reaching 11 knots in the early part of the night.
Smooth sea. Low, short swell from WSW. Good visibility becoming reduced by mist in the middle of the night then reduced by mist. Daytime of Thursday 17 september : Warning:reduced visibility early in the day.
Fog developing into low cloud during the morning, good clear periods with lots of cloud in the afternoon. No precipitation. In the evening, clear periods developing.
Chance of light rain. NW force 2 turning W force 3 in the middle of the day then WNW. Gusts reaching 13 knots all day. Smooth sea becoming smooth to slight in the evening. Low, short swell from W. Visibility reduced by mist becoming excellent in the middle of the day then poor.