For Zanzibar :
No gale warning.
The reliability of the situation is good.
Very cloudy with risk of thunderstorms in the morning, skies clearing but storms likely in the afternoon. Showers in late morning, possibility of showers in the afternoon. In the evening, clear spells, risk of mist forming.
Possibility of showers SW force 3 turning S in the middle of the day then SSE force 2. Gusts reaching 12 knots until the middle of the day. Slight sea. Low, short swell from ESE. Visibility reduced by mist temporarily in the middle of the day.