Climate Overview
The climate in Trincomalee is hot. The average annual temperature is 28°C and approximately 1319mm of precipitation falls per year. November is the wettest month, receiving around 380mm of rainfall. Trincomalee sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Trincomalee has relatively stable temperatures year-round, staying within a 7°C range. The warmest month is June, when average highs reach 32°C and the mean temperature sits around 30°C. January is the coolest month, with minimum temperatures around 25°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.
Precipitation
Trincomalee is a fairly wet location, receiving approximately 1319mm of precipitation annually, which averages out to around 110mm per month. The wettest month is November, averaging 380mm of rainfall. December and October also tend to see above-average precipitation. The driest month is June, with just 19mm. That's 361mm 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
Trincomalee is moderately windy, with an average annual wind speed of 25km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 32km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in April, with average winds dropping to 19km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 13km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 23km/h in winter, 21km/h in spring, 31km/h in summer, 24km/h in autumn.
Seasons
89 days until Summer
It is currently spring in Trincomalee, which began on March 20, 2026. Trincomalee sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in June at around 32°C, while the coldest stretch bottoms out in January near 25°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 26 to 31°C. Precipitation is moderate at around 168mm for the season, averaging 56mm per month. Winds are moderate at around 21km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 27 to 32°C. Rainfall is relatively light, with around 90mm over the season and a monthly average of 30mm. Winds are strong, averaging 31km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 26 to 31°C. Rainfall is heavy, totalling around 644mm across the season with a monthly average of 215mm. Winds are moderate at around 24km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 25 to 27°C. Rainfall is heavy, totalling around 417mm across the season with a monthly average of 139mm. Winds are moderate at around 23km/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 Trincomalee 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.
