Climate Overview
The climate in Moratuwa is hot. The average annual temperature is 27°C and approximately 2752mm of precipitation falls per year. Moratuwa receives a notable amount of rainfall throughout the year, including during its driest month. Moratuwa sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Moratuwa has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is February, when average highs reach 32°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 23°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows.
Precipitation
Moratuwa is a very wet location, receiving approximately 2752mm of precipitation annually, which averages out to around 229mm per month. The wettest month is November, averaging 393mm of rainfall. May and October also tend to see above-average precipitation. The driest month is February, with just 72mm. That's 321mm less than November, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Moratuwa is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 7km/h in winter, 7km/h in spring, 11km/h in summer, 8km/h in autumn.
Seasons
89 days until Winter
It is currently autumn in Moratuwa, which began on September 23, 2026. Moratuwa sits near the equator, so the traditional four-season cycle is less pronounced. Temperatures remain relatively stable year-round. The warmest period peaks in February at around 32°C, while the coldest stretch bottoms out in January near 23°C. Winter is next, beginning on December 21, 2026 (89 days from now).
Spring
Temperatures range from 25 to 32°C. Rainfall is heavy, totalling around 679mm across the season with a monthly average of 226mm. Winds are generally light, averaging 7km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 25 to 30°C. Rainfall is heavy, totalling around 712mm across the season with a monthly average of 237mm. Winds are generally light, averaging 11km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 30°C. Rainfall is heavy, totalling around 986mm across the season with a monthly average of 329mm. Winds are generally light, averaging 8km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 23 to 32°C. Rainfall is heavy, totalling around 375mm across the season with a monthly average of 125mm. Winds are generally light, averaging 7km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Moratuwa based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
