Sundarbans weather in May

May in Sundarbans: sweltering, soaked, with muggy air — not the time — 16 rainy days.

Updated September 2026 · climate normals from ERA5 reanalysis

Sundarbans🇧🇩 Bangladesh · Bangladesh & Bengal · National park43
  1. 87Jan
  2. 80Feb
  3. 63Mar
  4. 45Apr
  5. 43May
  6. 36Jun
  7. 41Jul
  8. 38Aug
  9. 50Sep
  10. 58Oct
  11. 74Nov
  12. 83Dec

#9 of 12 months in Sundarbans · #1338 of 1413 destinations to visit in May · comfort 43/100 (tier F)

Days
34°C
Nights
26°C
Wet days
16
Sun
10.3 h
Humidity
79%
Daylight
13 h
Sundarbans, Bangladesh
Photo: Md Amanat Ullah · Pexels

Traveller notes on Sundarbans in May

Other months in Sundarbans

Sundarbans-forum threads and guides on an October visit describe this as the start of the recommended season, posters calling October through March the real window when calmer waters and cooler conditions make tiger spotting considerably more realistic. Regulars call October scenery lush, greenery from the earlier wet season still visible even as the water begins to calm down. Posters recommend later winter months over October specifically for tiger sightings, dense October vegetation cited as a real hindrance compared with the barer landscape of December through February. Regulars call boat-based exploration the only way to see the reserve, no road network reaching most of the core area. Posters recommend booking through an established local operator regardless of season, river routes here considered genuinely variable year to year. The record: 30.4C days feeling like 34C, 24C nights, an extraordinarily high 151.9mm across nearly 15 days and 76 percent humidity.
SundarbansOctoberRegular · October · 1 month ago · Read more on theroamingguide.com ↗
Sundarbans-forum threads on a late June visit describe monsoon conditions as already well underway locally, posters calling river behavior genuinely less predictable once the season sets in. Regulars call this generally not the recommended window, several posters suggesting May or waiting until September instead for calmer conditions. Posters describe one traveler still choosing to go in early June despite the timing, calling the trip workable though acknowledging the onset of storms made it more challenging than an off-season visit. Regulars call tiger sightings considerably less likely this time of year, the best viewing window generally November through February instead. Posters recommend a flexible itinerary and a reliable operator regardless of exact dates, river routes here capable of changing on short notice. The record: 32.2C days feeling like 38C, 26.9C nights, an extraordinarily high 267.4mm across over 24 days and 79 percent humidity.
SundarbansJuneRegular · June · 1 month ago · Read more on Tripadvisor ↗
Sundarbans-forum threads on the winter season describe February as genuinely the most comfortable stretch for a boat-based visit, posters calling daytime conditions pleasantly warm without the humidity that builds later in spring. Regulars call a multi-day boat tour the only real way to see the mangrove forest, day trips from Kolkata generally too rushed to reach tiger-sighting zones like Sajnekhali. Posters recommend tempering expectations on tiger sightings, even experienced crews going full seasons without one, the ecosystem and birdlife the more reliable draw. Regulars call mornings on open water properly cool, a light jacket useful before the day warms up. Posters describe dry grassland patches and calm tidal creeks as ideal for spotting deer and crocodiles. Regulars recommend a registered operator, Forest Department permits required for core-area entry. The record: 28.2C days feeling like 30C, 17.2C nights, a scant 2.4 days of measurable precipitation and 69 percent humidity.
SundarbansFebruaryRegular · February · 1 month ago · Read more on Tripadvisor ↗
Sundarbans-forum threads on rain describe September as the waning phase of the monsoon across Bengal, conditions capable of swinging between a settled stretch and a properly wet one depending on the year. Posters call the mangrove waterways and boat-based wildlife viewing largely unaffected by a passing shower, most of a multi-day cruise continuing regardless of a spell of rain. Regulars are direct spotting a tiger is never guaranteed, posters recommending visitors treat the wider mangrove ecosystem and birdlife as the real draw rather than fixating on one sighting. Posters describe humidity as genuinely high, breathable clothing and real bug protection standing advice regardless of forecast. Regulars call winter the more favored season, September still entirely workable for travelers comfortable with humid, unpredictable conditions. The record: 31.1C days feeling like a punishing 37C, 25.9C nights, an extraordinarily high 236mm across over 25 days and 87 percent humidity.
SundarbansSeptemberRegular · September · 1 month ago · Read more on Tripadvisor ↗

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Sundarbans climate normals — May

Daytime high34°C / 92°F🔥 sweltering
Nighttime low26°C / 79°F
Feels like (high)39°C / 102°F
Rainfall185 mm / 7.3 in⛈ soaked
Rainy days16 days
Humidity79%💦 very humid
Dew point25°C / 77°F
Sunshine10.3 h/day
Daylight13.2 h
Wind16 km/h / 10 mph
Air quality (US AQI)79🙂 moderate

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Sundarbans in May

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Shoulder seasonschool holidays in 2 of the markets that fill it, an ordinary month(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Best months for Sundarbans's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherSundarbans's weather peaks December–February, best around January.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in Sundarbans in May

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Nature

    Wild honey collection

    1 Apr – 31 May · usuallyHarvestRisk

    The mouals go in on permits at the start of April to cut wild comb from the mangrove, the one licensed harvest the forest still allows. It is also the season most of the tiger encounters happen in.

What's on around the world in May →

Where is Sundarbans?

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Sundarbans in May — FAQ

Is May a good time to visit Sundarbans?
May in Sundarbans: sweltering, soaked, with muggy air — not the time — 16 rainy days. It ranks #9 of 12 months for Sundarbans on SeasonMap's comfort score (43/100).
What is the weather like in Sundarbans in May?
In May, Sundarbans averages a daily high of 33.5°C and a low of 26.3°C, with about 184.7 mm of rain over roughly 16 rainy days.
What is the air quality in Sundarbans in May?
Sundarbans has a mean US Air Quality Index of about 79 in May.