Chilaw Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Chilaw.
Climate overview of Chilaw
Chilaw, in Sri Lanka's Puttalam District, maintains fairly consistent very warm temperatures throughout the year with little seasonal variation. The area experiences heavy rainfall spread across the seasons, with distinct monsoon periods bringing intense downpours. People come to Chilaw for the pristine beaches and coastal wetlands. Let's explore the climate details to provide you with a complete overview on when to visit.
Chilaw Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Chilaw - and find the best time to visit.
Monthly Temperature in Chilaw
With minimal seasonal shifts, Chilaw experiences a constant climate year-round. Average daytime temperatures reach a very warm 33°C (91°F) in March. In August, the coolest month of the year, temperatures drop to a comfortable 30°C (86°F).
At night, temperatures range from around 27°C (81°F) in March to 24°C (75°F) in August.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Chilaw
Chilaw has a notably wet climate with abundant precipitation, recording 1902 mm (75 in) of rainfall per year. Chilaw can be quite wet during October, receiving approximately 302 mm (12 in) of precipitation over 14 rainy days.
In contrast, during the driest month (January), you will experience much drier conditions, with 43 mm (1.7 in) of precipitation spread across 4 rainy days. For more details, please visit our Chilaw Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Chilaw
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January and February
- Warmest weather: February, March, April and May
- Fewest rainy days: January, February and August
- Wettest months: September, October and November, when rainfall is highest.
- Seasonal pattern: Two distinct rainy seasons, April to June and September to November
Frequently asked questions about the climate in Chilaw
What is the best time to visit Chilaw?
January and February typically offer the most optimal weather in Chilaw. In contrast, May, June, September, October and November tend to have less optimal conditions. Chilaw has two distinct rainy seasons, April to June and September to November.
What temperatures can I expect in Chilaw?
Daytime highs range from 30°C (86°F) in August to 33°C (91°F) in March. Nighttime lows range from 24°C (75°F) to 27°C (81°F). Temperatures stay relatively stable year-round.
How much rain does Chilaw get?
Annual rainfall is around 1902 mm (75 in). October is the wettest month with 302 mm (12 in), while January is the driest with 43 mm (1.7 in).
Chilaw 3-Day Forecast
Chilaw on the map
Chilaw is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Colombo
30°C (86°F) Negombo30°C (86°F) Mirissa29°C (84°F) Unawatuna29°C (84°F) Hikkaduwa29°C (84°F) Galle29°C (84°F) Kandy
29°C (84°F) Nuwara Eliya28°C (82°F) 
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