We went for a holiday to Zanzibar in September 2009, wind was bit light but we managed to get some downwind kitesurfing action.
We stayed on the east coast of Zanzibar where the conditions are perfect for kite surfing. Wind is stronger in middle of the year, September the wind was light but good for downwind sessions.
If there is no wind climb some coconut trees.
We can recommend you go on a spice tour while on island.
Even the cows enjoy the beaches.
Want to go back in middle of Zanzibar’s windy season Jun – Aug.