The confluence of the Terai grasslands and Bhabhar grasslands, Manas National Park is set against the backdrop of the Eastern Himalayas. Named after the Manas River that hurtles down the nearby rugged hills, the national park is a pride of Assam and of the entire country. Weather in Manas National Park is mostly good all year round, except monsoons. This UNESCO World Heritage site remains open from October to May, which makes both summer and winter the ideal times to visit the park.

This period ensures maximum visibility for the sighting of animals. This is because of the practice adopted by the forest officials of burning down elephant grasses to reduce the chances of a forest fire. March is also the time when Simul trees are in full bloom. The cotton from Simul flowers cover the roads and it is a sight to behold. Summers are however not all pleasant and mild. The month of May has the temperatures soaring to 37°C and it can get quite sultry.

Assam experiences very heavy rainfall during monsoon and major parts of the state remains submerged under flood water. Manas National Park is no exception. The park remains closed from June to September.

Winter is pleasant and mild with temperatures hovering between 15°C and 25°C. This is the ideal time to visit for birdwatchers. Hundreds of migratory birds make Manas their home for the next few months to escape the harsh winter of the mountains. It offers an excellent opportunity for sighting some rare species of birds like Brown-headed gull, Greater Spotted Eagle, Marsh Harrier, Hen Harrier, Northern Shoveler and many others. However it might not be the most favourable time for sighting wildlife. After the monsoon rains, the forest tends to become very dense, which reduces the possibility of viewing wildlife movements.