The best time for a family vacation in West Bengal depends heavily on which part of the state you’re visiting, since the state spans coastal plains, a river delta, and Himalayan foothills with genuinely different climates — but October through February works well across nearly all of them.
Kolkata itself is most comfortable for family sightseeing from October to February, when cooler, drier weather makes long days of walking between Victoria Memorial, Howrah Bridge, and Science City far more manageable with children than the humid heat of April through June.
Darjeeling and the Dooars are best visited March to May or October to December for families, since these windows avoid both monsoon landslide risk on hill roads and the coldest winter temperatures, which can be uncomfortable for younger children even though many families do visit successfully in December and January with proper layering.
The Sundarbans work best October through March, and family trips here should factor in that boat safaris involve long stretches of sitting and waiting for wildlife that may not appear — this suits patient older children better than very young kids, and shorter itineraries are usually a better fit for families with toddlers.
Digha and other beach destinations are most comfortable October to February, avoiding both the summer heat of March to June and the rough monsoon surf between June and September that makes swimming unsafe and often closes beaches to bathers entirely.
Chandrawanshi Tour & Travels regularly builds family holiday packages around these seasonal windows, choosing vehicles and pacing suited to travelling with children rather than a standard adult itinerary — see our holiday types for more options by travel style.