Colombo Weather in August
August in Colombo brings very high temperatures, with daytime highs of 30°C (86°F) and nights around 26°C (79°F). It's part of the rainy season, with 211 mm (8.3 in) of rainfall on average, so an umbrella or poncho is a good idea.
Rainfall in Colombo in August
As part of the rainy season, Colombo sees around 10 days of rain in August, with an average of 211 mm (8.3 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.
Temperature in Colombo in August
August in Colombo brings very high temperatures, with highs of 30°C (86°F) and nights around 26°C (79°F). Mornings and evenings are often more comfortable than the peak afternoon hours. Nights stay warm at around 26°C (79°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Colombo in August
Expect sunny days throughout the month, with an estimated 202 hours of sunshine. Despite being the rainy season, it could still be a nice time to visit. Rain often arrives later in the day, keeping most of the days sunny.
Wind Speed in Colombo in August
Wind speeds average 2 m/s (4 knots) during August. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.
Average water temperature in August
The water temperature is 26°C (79°F), which most people find very comfortable. A good month for swimming and water sports.If you prefer dry days with pleasant temperatures, August may not be the ideal month to visit Colombo. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Sri Lanka, check out our Colombo's climate page.
Colombo Temperature in August
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Water Temperature
26°C (79°F)
Chance of Rain
33%
Precipitation
211 mm (8.3 in)
Rainy days
10 days
Humidity
77%
Windspeed
2 m/s (4 knots)
Sunshine
202 hours
Percentage Sunshine
Daily Historical Temperatures
45-year average (1976-2025)
Based on our historical records, temperatures in Colombo typically stay consistent throughout August, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in August
Daily Historical Precipitation
45-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Colombo in August
Browse day-by-day weather records for Colombo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Colombo historical weather extremes in August
According to our 29 years of weather records for Colombo, the following extremes were recorded between 1996 and 2025.
- The hottest August day on record in Colombo reached 33°C (91°F) (August 23, 2024).
- On August 23, 1996, Colombo saw its coldest August day with temperatures maxing out at 25°C (77°F).
- The coldest night in August in Colombo was on August 23, 2019, with a minimum of 19°C (66°F).
Best Places in Sri Lanka in August
Find out more about the weather in Sri Lanka and which places have the best travel conditions in this month. See all of Sri Lanka in August →
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What to Wear in Colombo in August
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! With water temperatures around 26°C (79°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Colombo in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Sri Lanka, check out our Colombo's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Colombo climate overview or explore weather in Sri Lanka.
