Cox's Bazar weather in September

September in Cox's Bazar: sweltering, soaked, with clean air — a gamble, with 25 rainy days.

Updated September 2026 · climate normals from ERA5 reanalysis

Cox's Bazar🇧🇩 Bangladesh · Bangladesh & Bengal · Beach56
  1. 90Jan
  2. 94Feb
  3. 91Mar
  4. 83Apr
  5. 73May
  6. 51Jun
  7. 48Jul
  8. 49Aug
  9. 56Sep
  10. 68Oct
  11. 86Nov
  12. 88Dec

#9 of 12 months in Cox's Bazar · #1194 of 1413 destinations to visit in September · comfort 56/100 (tier D)

Days
29°C
Nights
26°C
Wet days
25
Sun
8.1 h
Humidity
88%
Daylight
12 h
Cox's Bazar, Bangladesh
Photo: Saied Shohag · Pexels

Traveller notes on Cox's Bazar in September

Other months in Cox's Bazar

Forum posters describe August across Bangladesh as hot, humid and squarely within monsoon season, with a high likelihood of heavy rainfall and localized flooding risk. Posters recommend November through March as the more reliable window specifically for Cox's Bazar, Bangladesh's main beach destination, implying August sits well outside its ideal weather stretch. Posters are consistent that while some sights and attractions elsewhere in the country remain accessible during the rains, travel plans benefit from staying flexible and monitoring forecasts closely. Some posters do note a certain charming, moody atmosphere to traveling Bangladesh during the rainy season for those willing to embrace it. Posters generally rate August as hot, wet and outside Cox's Bazar's recommended beach season, workable only with realistic, flexible expectations.
Tripadvisor community · August · 1 month ago · Read more on Tripadvisor ↗
Forum posters name February as the supreme time to visit Bangladesh generally, describing it as much less hot and humid with winter in full bloom - genuinely the best weather window of the year by posters' consistent reckoning. Posters name November through March, and February specifically, as the best stretch for Cox's Bazar, with December and January noted as running properly cold by local standards even though this is nowhere near a Northern-Hemisphere winter cold. Posters generally recommend February as a strong, low-risk choice for beach time along Cox's Bazar's long coastline, sitting comfortably within the dry winter season before the pre-monsoon heat begins building later in spring.
Tripadvisor community · February · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Cox's Bazar's card on the map.

Cox's Bazar climate normals — September

Daytime high29°C / 85°F🔥 sweltering
Nighttime low26°C / 78°F
Feels like (high)35°C / 95°F
Sea temperature30°C / 86°F♨️ bath-warm
Rainfall357 mm / 14 in⛈ soaked
Rainy days25 days
Humidity88%💦 very humid
Dew point25°C / 77°F
Sunshine8.1 h/day
Daylight12.3 h
Wind17 km/h / 10 mph
Air quality (US AQI)42🍃 good

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

Crowds in Cox's Bazar in September

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 3 of the markets that fill it, an ordinary month(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Cox's Bazar'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 weatherCox's Bazar's weather peaks January–March, best around February.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in Cox's Bazar in September

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

  • Season

    Wet season

    MonsoonRisk

    25 rainy days and about 357 mm in the month — the real kind of rainy season, not afternoon showers.

    from the climate normals

What's on around the world in September →

Where is Cox's Bazar?

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Cox's Bazar in September — FAQ

Is September a good time to visit Cox's Bazar?
September in Cox's Bazar: sweltering, soaked, with clean air — a gamble, with 25 rainy days. It ranks #9 of 12 months for Cox's Bazar on SeasonMap's comfort score (56/100).
What is the weather like in Cox's Bazar in September?
In September, Cox's Bazar averages a daily high of 29.4°C and a low of 25.6°C, with about 356.6 mm of rain over roughly 25.2 rainy days.
What is the air quality in Cox's Bazar in September?
Cox's Bazar has a mean US Air Quality Index of about 42 in September.