The standard tourist season is in January and February, when the hot, dry weather at this time of year is generally considered to be the most pleasant. But to catch the Serengeti at its best you want to avoid the dry season when virtually all the animals go on holiday to Kenya. Be prepared if you're heading in the wet season, as many roads - particularly on the south coast - can become too squishy to drive on.
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The biggest annual event in Tanzania begins at the Serengeti National Park near the Kenyan border, when huge herds of wildebeests head for greener pastures in Kenya. Starting in April each year, more than 2 million of these animals migrate across the Serengeti's southern plains accompanied by zebras, antelopes, gazelles, lions and tourists. Tanzanian Independence Day (December 9) somehow pales in significance.
