The Sundarbans is a natural region comprising southern Bangladesh and a part in the Indian state of West Bengal. It is the largest single block of tidal halophytic mangrove forest in the world. The Sundarbans covers approximately 10,000 square kilometres (3,900 sq mi) most of which is in Bangladesh with the remainder in India. The Sundarbans is a UNESCO World Heritage Site.
Sundarbans South, East and West are three protected forests in Bangladesh. This region is densely covered by mangrove forests, and is the largest reserves for the Bengal tiger. The Sundarbans National Park is a National Park, Tiger Reserve, and a Biosphere Reserve located in the Sundarbans delta in the Indian state of West Bengal.
Sundarban National Park is located in between 21° 432' – 21° 55' N latitude and between 88° 42' – 89° 04' E longitude. The average altitude of the park is 7.5 m above sea level. The park is made up of 54 small islands and is crisscrossed by several distributaries of the Ganges.
The average minimum and maximum temperature is 20 °C and 48 °C respectively. Rainfall is heavy with humidity as high as 80% as it is close to the Bay of Bengal. The monsoon lasts from mid-June to mid-September. Prevailing wind is from the north and north-east from October to mid-March and south west westerlies prevails from mid-March to September. Storms which sometimes develop into cyclones are common during the months of May and October.