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, skies with few clouds covering over progressively.
No precipitation. S force 3 becoming SSE force 4 in the middle of the day then NE force 3. Gusts reaching 21 knots in the middle of the day. Moderate sea becoming slight in the evening. Low, short swell from S. Excellent visibility becoming excellent in the evening.