sundarban weather month wise guide
Sundarban weather is shaped by tides, monsoon winds, and coastal climate. Winters are mild and best for travel, summers are hot and humid, and monsoons bring heavy rain and restrictions. Understanding seasonal weather helps travelers plan safe boat safaris and comfortable Sundarban tours.
Overview of Sundarban Weather
The Sundarbans, the world’s largest mangrove forest, lies at the edge of the Bay of Bengal. Because of this coastal location, Sundarban weather is very different from nearby cities. The climate is tropical, humid, and strongly influenced by tides, rivers, and seasonal winds.
As a local tour operator and frequent visitor, I have experienced weather in Sundarban during winter, early summer, and post-monsoon periods. Weather directly affects boat safaris, wildlife movement, photography, and even forest permissions. Planning a Sundarban trip without understanding weather patterns can lead to discomfort or cancellations.
Understanding the Climate of Sundarbans
The Sundarban climate is classified as tropical coastal. Humidity remains high throughout the year, while temperatures vary by season. Tides rise and fall twice daily, and strong weather changes can affect river conditions.
Key climate features:
Hot and humid summers
Heavy rainfall during monsoon
Mild, dry winters
Weather impacts forest access and safety rules
Forest Department advisories and permits are closely linked to seasonal weather conditions.
Sundarban Weather Month by Month
Below is an approximate month-wise table based on long-term patterns (not live forecasts):
Month | Avg Day Temp | Avg Night Temp | Rainfall Level | Travel Condition |
|---|---|---|---|---|
January | 22–25°C | 12–15°C | Very Low | Excellent |
February | 24–27°C | 14–17°C | Very Low | Excellent |
March | 28–32°C | 18–22°C | Low | Good |
April | 32–36°C | 22–25°C | Low–Moderate | Hot |
May | 34–38°C | 24–27°C | Moderate | Difficult |
June | 30–34°C | 26–28°C | High | Poor |
July | 28–32°C | 26–27°C | Very High | Not Recommended |
August | 28–31°C | 26–27°C | Very High | Not Recommended |
September | 29–32°C | 25–26°C | High | Risky |
October | 28–31°C | 22–24°C | Moderate | Good |
November | 25–28°C | 18–20°C | Low | Very Good |
December | 24–26°C | 13–16°C | Very Low | Excellent |
This table helps travelers understand Sundarban temperature and rainfall trends for planning.
Winter Season (November to February)
Winter is widely considered the best time to visit Sundarban weather-wise. Days are pleasant, humidity drops, and rain is minimal.
From personal experience, winter mornings in Sundarbans are calm, slightly misty, and ideal for boat safaris. Wildlife such as deer, birds, and crocodiles are more visible, and river conditions remain stable.
Typical winter conditions:
Day temperature: 22–26°C
Night temperature: 12–16°C
Low humidity and clear skies
Most forest zones remain open, and permits are easily available during this season.
Sundarban Weather in December
Sundarban weather in December is one of the most comfortable periods of the year. December sits in peak winter, making it one of the best months for first-time visitors.
December highlights:
Mild daytime temperatures (around 24–26°C)
Cool mornings and evenings
Very low rainfall
Calm rivers and good visibility
From my visits, December offers smooth boat rides, better photography light, and relaxed travel schedules. A light jacket is useful in the early morning, while afternoons feel pleasant.
Summer Season (March to May)
Summer in Sundarbans is hot and humid. Daytime temperatures often cross 35°C, and humidity makes conditions uncomfortable, especially during long boat journeys.
During one early summer visit, midday travel felt exhausting, and wildlife sightings were limited to early morning hours.
Summer challenges:
High heat and humidity
Wildlife stays deeper inside forest cover
Risk of dehydration
Forest authorities still allow tours, but early starts and proper hydration are essential.
Monsoon Season (June to September)
Monsoon is the most difficult period for weather in Sundarban. Heavy rainfall, strong tides, and cyclone risks dominate these months.
Key monsoon conditions:
Frequent rain and storms
High river water levels
Restricted or closed forest zones
During monsoon, many areas are closed by the Forest Department for safety and wildlife breeding. Travel is generally not recommended unless for research or essential work.
Climate Change Impact on Sundarbans
Climate change has started affecting Sundarban weather patterns. Rising sea levels, stronger cyclones, and irregular monsoons are increasing pressure on mangrove ecosystems.
Observed impacts:
Increased salinity in rivers
Coastal erosion and flooding
Longer humid seasons
Forest departments now adjust access rules more strictly, especially during unstable weather periods. Responsible tourism plays a key role in protecting this fragile region.
How Weather Affects Wildlife Sightings
Weather strongly influences animal movement in Sundarbans.
Winter: Crocodiles bask on riverbanks; birds migrate; deer stay active
Summer: Animals avoid open areas due to heat
Monsoon: Wildlife disperses into dense forest cover
Understanding seasonal weather improves realistic expectations for sightings.
Packing Checklist Based on Weather
Based on real travel conditions, packing should match the season.
Winter (Nov–Feb):
Light sweater or jacket
Comfortable cotton clothing
Hat and sunscreen
Summer (Mar–May):
Light breathable clothes
Reusable water bottle
Sun protection
Monsoon (Jun–Sep):
Umbrella or rain jacket
Waterproof bags
Quick-dry clothing
Mosquito repellent is essential year-round.
Forest Department Rules and Weather Advisories
Forest entry in Sundarbans is controlled by official permits. Weather conditions directly influence permissions.
Important points:
Some zones close during monsoon
Boat movement depends on tides and visibility
Only government-approved boats and guides allowed
Always check official advisories before travel.
Final Thoughts on Sundarban Weather
Understanding Sundarban weather helps travelers stay safe, comfortable, and informed. Winters offer the best balance of climate, accessibility, and wildlife activity, while monsoons demand caution. December stands out as one of the most pleasant months for a Sundarban trip.
