Kaptai Lake

Monastery Large reservoir surrounded by forested hills in Rangamati.

Kaptai Lake, created by the Kaptai Dam, is Bangladesh’s largest reservoir; tourists take boat trips, fish and visit lakeside resorts while exploring nearby tribal villages and forested hills.

Main image

Kaptai Lake is a large man-made reservoir in Rangamati District, Chittagong Division, Bangladesh created by the construction of the Kaptai Dam in the early 1960s. It is the largest artificial lake in Bangladesh and an important regional hydropower and fisheries resource.

The lake is known for its extensive shoreline, wooded hills and scattered islands; common activities include boat tours, fishing and resort stays on the lakeshore. Small villages and floating commerce line parts of the water, and boat travel is the primary way to reach many viewpoints and island sites.

The reservoir was formed when the Kaptai Dam was completed as part of a hydroelectric project in the early 1960s, which flooded valleys along the Karnaphuli River. The impoundment transformed local land use and created new fisheries and transport routes while displacing some communities.

Kaptai Lake sits in the Chittagong Hill Tracts region, with the town of Rangamati on its shore. It lies to the east-northeast of Chittagong city and is accessed by road from Rangamati and other district towns.

  • Best time to visit: Boat trips and local resorts operate from Rangamati and other lakeside towns; early morning or late afternoon light is best for photography of the hills and water.
  • Function: The reservoir was created by the Kaptai Dam and remains an important source of hydroelectric power and fisheries.
Kaptai Lake
Kaptai Lake, Rangamati District, Chittagong Division, Bangladesh
22.4958, 92.2292
No formal admission for the lake; boat tours typically 300-1,500 BDT depending on duration and group size

How to Get to Kaptai Lake #

Kaptai Lake is reached from Rangamati town (about 60-80 km from Chittagong city by road). Buses and private cars run from Chittagong to Rangamati; from Rangamati, hire a boat at the local jetty to explore the lake’s arms. Road travel from Chittagong typically takes 2-3 hours depending on traffic.

Tips for Visiting Kaptai Lake #

  • Hire a boat from Kaptai town to visit the Sangu river arm and the hilly islands - the captains know the best lookout points for sunset.
  • Combine a boat excursion with a visit to the parbatya (hill) villages to understand the displacement caused by the lake's creation.
  • Expect intermittent mobile reception; download maps and arrange pick-up times with the boat crew before setting off.

Best Time to Visit Kaptai Lake #

November-February is the best time to visit for calm weather and comfortable boat tours.

Cool season
November-February · 18-30°C
Clear skies and comfortable boating; the most pleasant period for exploration.
Monsoon and post-monsoon
June-September · 25-32°C
Full water levels and dramatic skies, but heavier rain can interrupt boat trips.

Weather & Climate near Kaptai Lake #

Climate

Kaptai Lake's climate is classified as Tropical Monsoon - Tropical Monsoon climate with hot summers (peaking in May) and mild winters (coldest in January). Temperatures range from 14°C to 33°C. Heavy rainfall (2788 mm/year), wettest in July with a pronounced dry season.

Air Quality: AQI 96 Moderate
Best Time to Visit
FebruaryJanuaryDecember
Temperature & Rainfall
Temperature Range
40°
Warmest Month
Coldest Month
Monthly Conditions

January

January is mild with highs of 26°C and lows of 14°C. The driest month with just 5 mm and mostly sunny skies.

93 Ideal

Comfort

20°
Feels Like Mild
20°C
Temperature
14° 26°
62%
Humidity
Humid

Weather

5 mm
Rainfall
0.6 m/s
Wind
Calm
1.3
UV Index
High
10.8h daylight

February

February is mild with highs of 28°C and lows of 16°C. Light rainfall and mostly sunny skies.

95 Ideal

Comfort

22°
Feels Like Mild
22°C
Temperature
16° 28°
54%
Humidity
Humid

Weather

13 mm
Rainfall
0.8 m/s
Wind
Calm
1.8
UV Index
Very High
11.3h daylight

March

March is warm with highs of 32°C and lows of 20°C. Moderate rainfall (30 mm).

89 Excellent

Comfort

26°
Feels Like Warm
26°C
Temperature
20° 32°
53%
Humidity
Humid

Weather

30 mm
Rainfall
1.3 m/s
Wind
Calm
2.0
UV Index
Extreme
11.9h daylight

April

April is hot, feeling like 30°C. Significant rainfall (107 mm) and partly cloudy skies.

71 Very Good

Comfort

30°
Feels Like Hot
28°C
Temperature
23° 33°
64%
Humidity
Humid

Weather

107 mm
Rainfall
1.4 m/s
Wind
Calm
2.1
UV Index
Extreme
12.6h daylight

May

May is the hottest month, feeling like 33°C due to high humidity. Heavy rain (229 mm) and mostly overcast skies.

57 Acceptable

Comfort

33°
Feels Like Hot
29°C
Temperature
25° 33°
76%
Humidity
Very Humid

Weather

229 mm
Rainfall
1.7 m/s
Wind
Calm
2.0
UV Index
Extreme
13.1h daylight

June

June is hot, feeling like 32°C with oppressive humidity. Heavy rain (645 mm) and mostly overcast skies.

55 Acceptable

Comfort

32°
Feels Like Hot
28°C
Temperature
25° 31°
85%
Humidity
Very Humid

Weather

645 mm
Rainfall
1.7 m/s
Wind
Calm
2.0
UV Index
Very High
13.4h daylight

July

July is hot, feeling like 32°C with oppressive humidity. The wettest month with heavy rain (689 mm) and mostly overcast skies.

63 Good

Comfort

33°
Feels Like Hot
28°C
Temperature
25° 30°
88%
Humidity
Very Humid

Weather

689 mm
Rainfall
1.5 m/s
Wind
Calm
2.0
UV Index
Extreme
13.2h daylight

August

August is hot, feeling like 32°C with oppressive humidity. Heavy rain (491 mm) and mostly overcast skies.

55 Acceptable

Comfort

33°
Feels Like Hot
28°C
Temperature
25° 31°
88%
Humidity
Very Humid

Weather

491 mm
Rainfall
1.2 m/s
Wind
Calm
2.1
UV Index
Extreme
12.8h daylight

September

September is hot, feeling like 34°C with oppressive humidity. Heavy rain (297 mm) and mostly overcast skies.

53 Acceptable

Comfort

34°
Feels Like Hot
28°C
Temperature
25° 31°
88%
Humidity
Very Humid

Weather

297 mm
Rainfall
1.0 m/s
Wind
Calm
2.1
UV Index
Extreme
12.2h daylight

October

October is hot, feeling like 31°C with oppressive humidity. Heavy rain (204 mm) and partly cloudy skies.

61 Good

Comfort

31°
Feels Like Hot
27°C
Temperature
24° 31°
85%
Humidity
Very Humid

Weather

204 mm
Rainfall
0.7 m/s
Wind
Calm
1.9
UV Index
Very High
11.5h daylight

November

November is warm with highs of 29°C and lows of 20°C. Moderate rainfall (68 mm) and mostly sunny skies.

87 Excellent

Comfort

24°
Feels Like Warm
24°C
Temperature
20° 29°
78%
Humidity
Very Humid

Weather

68 mm
Rainfall
0.5 m/s
Wind
Calm
1.6
UV Index
Very High
10.9h daylight

December

December is mild with highs of 26°C and lows of 16°C. Light rainfall and mostly sunny skies.

93 Ideal

Comfort

21°
Feels Like Mild
21°C
Temperature
16° 26°
72%
Humidity
Very Humid

Weather

10 mm
Rainfall
0.6 m/s
Wind
Calm
1.3
UV Index
High
10.7h daylight

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