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, clear skies.
SE force 3 becoming SSE force 4 in the middle of the day then E force 3. Gusts reaching 25 knots in the middle of the day. Moderate sea. Low, short swell from SSE. Poor visibility becoming excellent in the middle of the day then good.