For Zanzibar :
No gale warning.
The reliability of the situation is good.
Sun and storm clouds in the morning,increasing sunny spells in the afternoon. Risk of showers in the morning, light showers dying away progressively in the afternoon. In the evening, cloud and long sunny periods.
Chance of light rain. SSW force 4 turning SSE in the middle of the day then SE. Gusts reaching 19 knots in the evening. Slight sea. Low, short swell from ESE. Good visibility becoming excellent in the middle of the day then good.