For Koumac :
No gale warning.
The reliability of the situation is good.
Sun in the morning, sunny, progressively clouding over in the afternoon. No precipitation. In the evening, very cloudy skies clearing completely.
No precipitation. SSW force 2 becoming S force 3 in the middle of the day then E. Gusts reaching 15 knots from the middle of the day. Slight sea. Low, short swell from S. Excellent visibility becoming good in the evening.