Dry Season (June to October):

This period is generally considered the best time to visit Tanzania, especially for safaris.
The weather is dry, with clear skies and minimal rainfall, making wildlife easier to spot as they gather around water sources.
Temperatures are cooler, particularly in the mornings and evenings, making it more comfortable for game drives and outdoor activities.
This is also the time of the great wildebeest migration in the Serengeti, typically occurring between June and August.

Green Season or Wet Season (November to May):

This period sees more rainfall, with April and May being the wettest months.
The landscape is lush and green, making it a beautiful time for photography.
Birdwatching is particularly good during this time as migratory birds are present.
Wildlife is still abundant, although animals are more dispersed due to the availability of water and vegetation.
This period is generally less crowded, and accommodations may offer lower rates.

Shoulder Seasons (November, April, and May):

These months transition between the wet and dry seasons and can offer a mix of experiences.
November can be a good time for game viewing as the short rains begin, bringing the landscape back to life and attracting newborn animals.
April and May are the peak of the wet season, but also offer the opportunity to witness the dramatic wildebeest calving season in the southern Serengeti.

Ultimately, the best time to visit Tanzania depends on your preferences and what you want to experience. If you’re primarily interested in wildlife viewing and safaris, the dry season is typically recommended. However, if you’re a birder or interested in photography, you might enjoy the green season despite the possibility of rain.