For Zanzibar :
No gale warning.
The reliability of the situation is good.
Sunny spells with possibility of mist forming in the morning, changeable skies becoming relatively cloud-free in the afternoon. No precipitation. In the evening, skies with few clouds.
SSW force 3 in the morning turning SE in the evening. Gusts reaching 18 knots in the evening. Slight sea. Low, short swell from ESE. Visibility reduced by mist becoming excellent in the middle of the day then poor.