For Gwynn Island Reef :
No gale warning.
The reliability of the situation is very good.
Very cloudy with risk of thunderstorms in the morning, skies clouding over with storms forming in the afternoon. Light showers progressively dying out in the morning, showers late in the day. In the evening, very cloudy with risk of storms.
Light showers. SW force 4 in the morning becoming force 5 in the evening. Gusts reaching 31 knots in the evening. Slight sea. Low, short swell from SE. Good visibility becoming excellent in the middle of the day.