SeasonMapTrincomalee weather in December
Sri Lanka
December in Trincomalee: hot, soaked, with clean air — fine if you can take 21 rainy days.
#11 of 12 months in Trincomalee · #777 of 1383 destinations to visit in December · comfort 68/100 (tier C)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Trincomalee in December
Other months in Trincomalee
Trincomalee's forum calls March dry season on land, but flags the sea as the catch — one visitor was told by hotel staff not to go in past their knees until late April or May, when the rougher swell finally settles. Another had a genuinely sunny, trouble-free stay in mid-March, sea aside.
Add your own note from Trincomalee's card on the map.
Trincomalee climate normals — December
| Daytime high | 29°C / 84°F | 🥵 hot |
|---|---|---|
| Nighttime low | 24°C / 76°F | |
| Feels like (high) | 33°C / 91°F | |
| Sea temperature | 28°C / 82°F | ♨️ bath-warm |
| Rainfall | 243 mm / 9.6 in | ⛈ soaked |
| Rainy days | 21 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 11.6 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Trincomalee in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyYear-end break in Sri Lanka, school holidays in 5 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Trincomalee's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherTrincomalee's best weather comes in February, March and June — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Trincomalee in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
Pigeon Island park rules
1 Jan – 31 DecClosuresThe island is a national park with a wildlife-department ticket bought at the Nilaveli jetty, a cap on visitor numbers and a ban on standing on the reef. Boats do not run when the sea is up. Source ↗
- Season
Northeast (Maha) monsoon
1 Nov – 15 Feb · usuallyRiskClosuresThe east coast's wet season, and a real shutdown: whale boats stop, the Pigeon Island crossing is off most days, and the beach hotels at Nilaveli close or drop to a caretaker.
- Season
Wet season
MonsoonRisk21 rainy days and about 243 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Trincomalee — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Trincomalee?
Trincomalee in December — FAQ
- Is December a good time to visit Trincomalee?
- December in Trincomalee: hot, soaked, with clean air — fine if you can take 21 rainy days. It ranks #11 of 12 months for Trincomalee on SeasonMap's comfort score (68/100).
- What is the weather like in Trincomalee in December?
- In December, Trincomalee averages a daily high of 29.1°C and a low of 24.3°C, with about 243.4 mm of rain over roughly 21.1 rainy days.
- What is the air quality in Trincomalee in December?
- Trincomalee has a mean US Air Quality Index of about 43 in December.
Other months in Trincomalee
Compare Trincomalee in December
Warmer or cooler than Trincomalee in December
Similar destinations in South Asia — December
Within 300 km: Nuwara Eliya's Adam's Peak pilgrimage season around 5 Dec – 10 May, and Colombo's Blue whales off Mirissa around 1 Nov – 15 Apr.