For Koumac :
No gale warning.
The reliability of the situation is good.
Very cloudy. But clear spells will become more and more widespread. Some light showers in the morning, light rain gradually becoming less frequent in the afternoon. In the evening, very cloudy skies clearing completely.
No precipitation. ENE force 3 turning SSE force 4 in the middle of the day then E. Gusts reaching 23 knots in the evening. Moderate sea becoming slight in the middle of the day. Low, short swell from SSE. Excellent visibility.