West Bengal Geography, Climate & Nature

West Bengal covers 88,752 square kilometres and narrows between Nepal, Bhutan, Bangladesh and other Indian states. Its shape explains why regional travel is organised by corridors rather than one centre.

Himalaya and Terai

The north rises through the Darjeeling and Kalimpong hills to Sandakphu, which the state identifies as its highest point. Below, the Terai and Dooars form forested foothills crossed by fast rivers.

Ganga plain

Much of central and southern Bengal lies on alluvial plains built and reworked by the Ganga–Padma system and its distributaries. Agriculture, settlement, railways and river crossings follow this low terrain.

Western uplands

Purulia, Bankura and adjoining districts meet the Chota Nagpur plateau margin. Laterite soils, low hills, seasonal forests and reservoirs create a drier landscape than the delta.

Delta and coast

South of Kolkata, channels spread toward the Bay of Bengal. The Sundarbans occupy the tidal seaward edge, where mangroves, islands and inhabited embankments remain exposed to cyclones, salinity and erosion.

Distance on a map is deceptive. North Bengal may be reached more logically by a separate flight or long rail journey than by adding it to a short Kolkata itinerary.

One forecast cannot describe West Bengal. Check the India Meteorological Department's North Bengal, South Bengal and district warnings against the exact route.

Cooler dry season

November through February is generally the easiest period across the plains and delta. Kolkata is less humid, while Darjeeling and higher places require warm layers and may face fog or cold disruption.

Pre-monsoon heat

March warms quickly. April and May can be hot and humid in Kolkata, the plains and coast, with thunderstorms capable of interrupting local travel.

Summer monsoon

Rain normally intensifies from June through September. Flooding, river erosion, landslides, waterlogging and ferry or road interruption vary by district and by storm.

Cyclone exposure

The coast and delta can be affected by severe cyclonic weather, storm surge and evacuation orders. Follow official forecasts and district instructions; never continue into the Sundarbans against a warning.

Autumn festival dates may arrive while humidity or residual rain remains. Pack for the forecast, not for a simple “post-monsoon” label.

West Bengal's north–south span compresses Himalayan, foothill, riverine, laterite, wetland, coastal and mangrove ecosystems into one state.

Northern forests

The Darjeeling hills, Terai and Dooars include broadleaf forest, grassland and river corridors. Elevation and rainfall create habitats that differ sharply across short distances.

Plains and wetlands

Rivers, floodplains, marshes and agricultural land support resident and migratory birds, fish and small wetlands. These working landscapes depend on water quality and seasonal flow.

Western plateau edge

Dry deciduous forest, laterite soils and low hills shape the west. Fire, extraction, grazing and fragmented habitat affect these less-promoted ecosystems.

Sundarbans

UNESCO describes an exceptionally dynamic mangrove landscape governed by tides, channels and sediment. It protects species and reduces some storm impacts, while remaining vulnerable to salinity, erosion and climate pressure.

Use designated entries and local operators. Biodiversity is not permission to collect plants, leave a trail or pursue an animal for a photograph.

West Bengal's wildlife journeys are habitat-specific. The Sundarbans, Dooars grasslands, Himalayan forests and central wetlands should not be sold as one guaranteed checklist.

Sundarbans: the World Heritage property protects mangrove habitat associated with Bengal tiger, estuarine crocodile, river dolphins and many birds. Sightings are uncertain and often distant; tides and forest rules determine the route.

Dooars and Terai: protected landscapes including Jaldapara and Gorumara are associated with one-horned rhinoceros, elephant, gaur, deer and birdlife. Entry systems and seasonal operations must be checked with the forest authority.

Himalayan north: higher forests support a different range of mammals and birds. Walking access, weather and local restrictions vary.

Choose an authorised gate and provider, keep noise low and accept the assigned route. Never feed wildlife, block an animal's path or treat a missed sighting as a failed visit.