For Zanzibar :
No gale warning.
The reliability of the situation is good.
Very cloudy with risk of thunderstorms in the morning, sun and storm clouds in the afternoon. Some light showers in the morning, possibility of showers in the afternoon. In the evening, lots of good clear periods.
No precipitation. SE wind force 3 continuing all day. Gusts reaching 14 knots in the morning. Slight sea. Low, short swell from ESE. Excellent visibility.