When travelling, we recommend packing in preparation to handle common weather conditions. The rainfall in Phuket is typically less than Zanzibar. We can gather that this will continue over the next 13 days.
We forecast the temperature to be around the 34 °Cs in February, on average. The temperature in Zanzibar is generally colder than in Phuket. Book flights in a timely manner in correlation to your departure date.