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, changeable skies clearing completely.
No precipitation. SSE force 3 in the morning weakening ESE force 1 in the evening. Gusts reaching 15 knots in the middle of the day. Slight sea. Low, fairly long swell from S. Poor visibility becoming excellent in the middle of the day then poor.