Tanzania has a tropical climate that varies by region and altitude. The coast is generally hot and humid, while the low-lying parks are dryer and cooler. The best time to visit Tanzania is during the dry season from July to October, coinciding with the Great Wildebeest Migration.
The best season to visit Tanzania is during the long dry season, which falls from July to September. These are considered the best months for Safari the Great Migration, trekking and beach holidays in Zanzibar.
Of course, these months are peak travel season. They will be busier, and some lodges, hotels, and parks will apply higher rates.
If you prefer a more secluded experience, consider visiting during the short rainy season from the end of October to December.
If possible, you'll want to avoid visiting during the long rainy season from March to May. The rains are often heavy and sudden, which can result in activities being cancelled last minute