For Btumbawe :
No gale warning.
The reliability of the situation is good.
Good clear periods but with plenty of cloud in the morning, sunny in the afternoon. Risk of some spots of rain in the morning, no precipitation in the afternoon. In the evening, fair weather with mostly clear skies.
SSW force 3 turning SSE force 4 in the middle of the day then becoming force 3. Gusts reaching 23 knots in the middle of the day. Slight sea. Low, short swell from ESE. Visibility reduced by mist becoming excellent in the middle of the day then good.