For Zanzibar :
No gale warning.
The reliability of the situation is good.
Stormy day. Showers all day. In the evening, skies clearing but continuing risk of storms.
Possibility of showers SE wind force 3 continuing all day. Gusts reaching 16 knots in the middle of the day. Slight sea. Low, short swell from SE. Visibility reduced by mist becoming excellent in the middle of the day then poor.