Weather in Colombo in August 2025
Average weather
Average temperature in Colombo in August
Going from a maximum of +31°C during the day to a minimum of +25°C during the night, the temperature in August averages around +30°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +29°C to +29°C.
Is Colombo warm or cold in August?
Colombo is typically warm in August.
Maximum temperatures go up compared to the previous month from +29°C to +29°C. The minimum temperature also goes up from +25°C to +25°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is one of the coolest months in Colombo, here is the comparison with other months:
Water temperature in Colombo in August
Water in Colombo in August is Warm. It varies from +26°C to +29°C, with an average of +27°C. This is almost similar to the air temperature, which averages +29°C.
The water temperature in August is one of the coldest of the entire year:
Can you swim in Colombo in August?
Climate in Colombo in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +29°C | +29°C | ||||
| Min. temperature | ||||||
| +23°C | +23°C | +23°C | ||||
| Max. temperature | ||||||
| +33°C | +32°C | +32°C | ||||
| Rainfall | ||||||
| 200 mm | 173 mm | 225 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +27°C | +27°C | +28°C | ||||
| Humidity | ||||||
| 84% | 84% | 84% | ||||
| Air pressure | ||||||
| 1008 HPa | 1009 HPa | 1009 HPa | ||||
| Sunny days | ||||||
| 0 | 0 | 0 | ||||
| Cloudy days | ||||||
| 1 | 1 | 1 | ||||
| Rainy days | ||||||
| 29 | 29 | 27 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. The temperature levels stay the same in the area of +29°C for average maximum temperature during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 200 mm to 173 mm. Humidity levels don’t change as the month goes on, averaging around 84%. The average wind speed doesn’t change much during August, staying around 4 m/s. The amount of sunny days stay about the same, averaging 0 sunny days during the month.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Colombo is gradually decreasing during August, going from 5 m/s to 4 m/s over the course of the month.
Rain
How was the weather last August in Colombo?
Climate Change over Years
The climate in Colombo in August has not changed much over the last 43 years.
The average temperature was the lowest in 2000 (+29°C) and the highest in 2020 (+32°C). The driest year was 1980 with only 1662 mm of rainfall, and the wettest year was 2006 with 3008 mm.
FAQ
Is August a good time to visit Colombo?
Can you sunbathe in Colombo in August?
Can you swim in Colombo in August?
Is Colombo rainy in August?
Is it sunny in Colombo in August?
Monthly weather in Colombo
Source of the data
For this page, we’ve looked at the typical weather in Colombo, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.