If you plan to organize a safari in Tanzania considered that the same is feasible throughout the year, as that of Tanzania is a typical equatorial climate. The rainy season in Tanzania varies depending on the altitude and position. If you plan a safari in the Serengeti, consider that the dry season corresponds to the months from June to October, when the park is at its most beautiful, and you can watch the migration to Kenya. During all other months you will risk finding of rainy days, but anything that may affect your travel.
If you plan a relaxing stay along the coast or on the islands of Tanzania, considered the best period with no rain and sunny days is our winter (November / March). Recommended a stay sea in April and May, where you risk finding there torrential rains. Another favorable period is from June to October, where the rains are minimal, sunny days but the temperature is lowered evening giving you a real refreshment.
The water temperature is high from November to March, while from June to October is pleasantly cool.
@Tanzania Will advise the best time for the trip of your dreams.