Trincomalee Weather in May
During May, Trincomalee experiences very high daytime temperatures of 34°C (93°F) and cooler nights around 27°C (81°F). Some rainfall is typical during this period.
Rainfall in Trincomalee in May
You can expect rain on around 4 days based on historical patterns, with 50 mm (2 in) average for the month. The rain this month typically falls in concentrated bursts rather than all-day showers. Expect a few heavier spells rather than constant grey skies.
Temperature in Trincomalee in May
In May, Trincomalee gets very high temperatures, with highs of 34°C (93°F). Nights cool to around 27°C (81°F). For most visitors, the main thing to prepare for is the heat during the day. With overnight lows of 27°C (81°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.
Sunshine in Trincomalee in May
Enjoy a sunny month with about 248 hours of sunshine, the clear skies make Trincomalee even more beautiful.
Wind Speed in Trincomalee in May
Average wind speeds reach 3 m/s (6 knots) in May, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.
Average water temperature in May
With water at 28°C (82°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period — it feels comfortable straight away.If you're looking for dry conditions and comfortable temperatures, May may not be the ideal month to visit Trincomalee. 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 Trincomalee's climate page.
Trincomalee Temperature in May
Min Temperature
27°C (81°F)
Max Temperature
34°C (93°F)
Water Temperature
28°C (82°F)
Chance of Rain
15%
Precipitation
50 mm (2 in)
Rainy days
4 days
Humidity
64%
Windspeed
3 m/s (6 knots)
Sunshine
248 hours
Percentage Sunshine
Daily Historical Temperatures
40-year average (1976-2025)
Based on our historical records, temperatures in Trincomalee typically stay consistent throughout May, with daily highs averaging around 34°C (93°F). Nights are warm, with lows around 27°C (81°F).
Average temperatures in May
Daily Historical Precipitation
40-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Trincomalee in May
Browse day-by-day weather records for Trincomalee spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Trincomalee historical weather extremes in May
Based on 21 years of weather observations (2005-2026), these are the most extreme conditions recorded in Trincomalee.
- On May 18, 2012, temperatures climbed to 38°C (100°F), marking the warmest May day on record.
- The lowest daytime temperature in May was 27°C (81°F), recorded on May 4, 2005.
- Trincomalee registered its coldest May night on May 13, 2013, with temperatures dropping to 22°C (72°F).
Best Places in Sri Lanka in May
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 May →
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What to Wear in Trincomalee in May
Pack for serious heat in Trincomalee in May. Prioritize clothing that breathes and doesn't cling or stick. Lightweight cotton, linen, and moisture-wicking fabrics are ideal. A wide hat provides welcome shade. Wet weather is likely, so pack waterproof gear for multiple rainy days. Expect water temperatures of around 28°C (82°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Trincomalee in May
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 Trincomalee's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Trincomalee climate overview or explore weather in Sri Lanka.
