AI-generatedTrincomalee at a glance
- Best time
- Feb – Apr, Jun
- Warmest month
- Jun · 36°
- Warmest sea
- May · 30.1°
- Sunshine a year
- 2,390 h
- Rain a year
- 1,351 mm
- Climate
- Tropical
- Time zone
- UTC+5:30
- Elevation
- 10 m
Climate in Trincomalee
Trincomalee has a tropical climate: it is warm all year round, and the seasons differ mainly in how much rain falls. June is the warmest month with average highs of 36 °C, while December is the coolest at 29 °C. With around 2,390 hours of sunshine a year, Trincomalee is sunny; April is the sunniest month with 7.9 hours a day.
Holiday weather through the year
Best time to visit Trincomalee
The best time to visit Trincomalee is from February to April and in June. For a beach holiday – sea from 21 °C, warm and mostly dry – go from February to September. From April to September it can get very hot, with highs of up to 36 °C. The rainy season is from October to January; the wettest month is November with 330 mm.
Trincomalee through the seasons
How the weather changes over the seasons, with averages for each.
Trincomalee in the dry season
Feb – Sep
Good
- 30–36 °C by day
- Sea 29 °C
- 7.2 h of sun a day
- 65 rainy days in all
Trincomalee in the rainy season
Oct – Jan
Good
- 29–33 °C by day
- Sea 28 °C
- 5.4 h of sun a day
- 79 rainy days in all
Which month for what?
Beach & swimming
Feb – Sep
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
No month
15–28 °C and not too much rain
Peak heat
Apr – Sep
Highs of 33 °C or more
Rainy months
Oct – Jan
Rainy season or more than 12 rainy days
Find your perfect month
Tell us what you like and we rate every month in Trincomalee for you.
Your best months: January – March
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Good
Best time to visit: February – April, June
October is in the cyclone season Hurricane season
Where to go in OctoberSea temperature in October
Keep in mindFrequent rainStorm season
A typical day in October
- Morning, 08:00: about 28°
- Midday, 13:00: about 33°
- Afternoon, 16:00: about 32°
- Evening, 20:00: about 28°
- Night, 23:00: about 27°
05:5217:49
Warm enough for a T-shirt in the evening.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:39–06:20 · evening 17:21–18:02
- Blue hour
- Morning 05:31–05:39 · evening 18:02–18:10
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Trincomalee compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 34° at the start of the month to 31° at the end. The days get 0.2 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 34° | 31° |
| Night-time low | 25° | 25° |
| Sea | 29° | 29° |
| Daylight | 12.1 h | 11.8 h |
What is the weather like in Trincomalee in October?
In October, Trincomalee is hot: daytime highs average 33 °C, and even at night it stays warm at around 25 °C. The sea averages 29.1 °C – almost as warm as a bath. Expect around 6.0 hours of sunshine a day. It is the rainy season: rain falls on about 19 days, totalling 201 mm. On about 28 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a good month for a holiday in Trincomalee.
More details for October
- Daylight
- 11 h 57 min05:52 – 17:49
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 74 %on averageAll months
- Hot days
- 28 days30 °C or moreAll months
- Time zone
- UTC+5:30offset from UTC
How the score comes together
- Temperatureweight 35 %76 %
- Seaweight 25 %100 %
- Sunshineweight 20 %50 %
- Few rainy daysweight 20 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Compare two months in Trincomalee
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
March has the better holiday weather in Trincomalee: score 85 against 61. In March, days are 1 °C cooler than in October. The sea is about as warm in both months. March has 10 fewer rainy days. The sun shines 2 hours longer a day in March.
| Month | October | March |
|---|---|---|
| Holiday weather score | 61 | 85better |
| Daytime high | 33° | 32° |
| Night-time low | 25° | 25° |
| Sea | 29.1° | 28.8° |
| Sunshine | 6.0 h | 7.8 hbetter |
| Rainy days | 19 | 9better |
| Rainfall | 201 mm | 45 mmbetter |
| Muggy days | 31 | 31 |
Based on the climate averages 1996–2025.
Trincomalee month by month
The typical weather for every month at a glance.
73January29° · Sea 27° · 5.8 h
In January, Trincomalee is hot: daytime highs average 29 °C, and even at night it stays warm at around 24 °C. The sea averages 27.0 °C – lovely and warm for swimming. Expect around 5.8 hours of sunshine a day. It is the rainy season: rain falls on about 16 days, totalling 147 mm. The air is often humid and muggy. All in all, January is a good month for a holiday in Trincomalee.
Trincomalee in January84February30° · Sea 28° · 6.9 h
In February, Trincomalee is hot: daytime highs average 30 °C, and even at night it stays warm at around 25 °C. The sea averages 27.7 °C – lovely and warm for swimming. The sun shines for around 6.9 hours a day. Rain is frequent, with about 10 rainy days and 80 mm in total. On about 19 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, February is an excellent month for a holiday in Trincomalee.
Trincomalee in February85March32° · Sea 29° · 7.8 h
In March, Trincomalee is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. The sea averages 28.8 °C – lovely and warm for swimming. The sun shines for around 7.8 hours a day. Rain falls on about 9 days, adding up to 45 mm. On about 29 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, March is an excellent month for a holiday in Trincomalee.
Trincomalee in March73April34° · Sea 30° · 7.9 h
In April, Trincomalee is very hot: daytime highs average 34 °C, and even at night it stays warm at around 26 °C. The sea averages 29.9 °C – almost as warm as a bath. The sun shines for around 7.9 hours a day. Rain is frequent, with about 11 rainy days and 63 mm in total. The thermometer climbs to 30 °C or more every day. The air is often humid and muggy. All in all, April is a good month for a holiday in Trincomalee.
Trincomalee in April67May36° · Sea 30° · 7.6 h
In May, Trincomalee is very hot: daytime highs average 36 °C, and even at night it stays warm at around 27 °C. The sea averages 30.1 °C – almost as warm as a bath. The sun shines for around 7.6 hours a day. Rain falls on about 8 days, adding up to 53 mm. The thermometer climbs to 30 °C or more every day. The air is often humid and muggy. All in all, May is a good month for a holiday in Trincomalee.
Trincomalee in May70June36° · Sea 30° · 7.1 h
In June, Trincomalee is very hot: daytime highs average 36 °C, and even at night it stays warm at around 27 °C. The sea averages 29.6 °C – almost as warm as a bath. The sun shines for around 7.1 hours a day. Rain is rare: about 3 days bring 18 mm in total. The thermometer climbs to 30 °C or more every day. The air is often humid and muggy. It is often windy: on a typical day the wind peaks at around 28 km/h. All in all, June is a good month for a holiday in Trincomalee.
Trincomalee in June67July36° · Sea 29° · 6.6 h
In July, Trincomalee is very hot: daytime highs average 36 °C, and even at night it stays warm at around 26 °C. The sea averages 29.1 °C – almost as warm as a bath. The sun shines for around 6.6 hours a day. Rain falls on about 6 days, adding up to 30 mm. The thermometer climbs to 30 °C or more every day. The air is often humid and muggy. All in all, July is a good month for a holiday in Trincomalee.
Trincomalee in July64August36° · Sea 29° · 6.8 h
In August, Trincomalee is very hot: daytime highs average 36 °C, and even at night it stays warm at around 26 °C. The sea averages 28.9 °C – lovely and warm for swimming. The sun shines for around 6.8 hours a day. Rain falls on about 8 days, adding up to 50 mm. The thermometer climbs to 30 °C or more every day. The air is often humid and muggy. All in all, August is a good month for a holiday in Trincomalee.
Trincomalee in August63September35° · Sea 29° · 6.6 h
In September, Trincomalee is very hot: daytime highs average 35 °C, and even at night it stays warm at around 25 °C. The sea averages 28.9 °C – lovely and warm for swimming. The sun shines for around 6.6 hours a day. Rain is frequent, with about 10 rainy days and 57 mm in total. The thermometer climbs to 30 °C or more every day. The air is often humid and muggy. All in all, September is a good month for a holiday in Trincomalee.
Trincomalee in September61October33° · Sea 29° · 6.0 h
In October, Trincomalee is hot: daytime highs average 33 °C, and even at night it stays warm at around 25 °C. The sea averages 29.1 °C – almost as warm as a bath. Expect around 6.0 hours of sunshine a day. It is the rainy season: rain falls on about 19 days, totalling 201 mm. On about 28 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a good month for a holiday in Trincomalee.
Trincomalee in October66November30° · Sea 29° · 4.7 h
In November, Trincomalee is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. The sea averages 28.7 °C – lovely and warm for swimming. Expect around 4.7 hours of sunshine a day. It is the rainy season: rain falls on about 24 days, totalling 330 mm. On about 16 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, November is a good month for a holiday in Trincomalee.
Trincomalee in November66December29° · Sea 28° · 4.9 h
In December, Trincomalee is hot: daytime highs average 29 °C, and even at night it stays warm at around 24 °C. The sea averages 27.6 °C – lovely and warm for swimming. Expect around 4.9 hours of sunshine a day. It is the rainy season: rain falls on about 21 days, totalling 279 mm. On about 5 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, December is a good month for a holiday in Trincomalee.
Trincomalee in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Trincomalee
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Hot 24° and more
- muggy month (15+ muggy days)
HotOctober: nights around 25°. Hot nights: air conditioning makes sleeping much easier. Muggy on about 31 days (dew point 18 °C or more).
The coolest nights are in December (24°), the warmest in June (27°). Nights stay tropical all year (20 °C and more), so a room with air conditioning or at least a fan pays off. It is muggy (dew point 18 °C or more) all year, on about 362 days a year.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 73 | 29° | 24° | 27.0° | 5.8 h | 16 | 147 |
| FebruaryFeb | 84 | 30° | 25° | 27.7° | 6.9 h | 10 | 80 |
| MarchMar | 85 | 32° | 25° | 28.8° | 7.8 h | 9 | 45 |
| AprilApr | 73 | 34° | 26° | 29.9° | 7.9 h | 11 | 63 |
| MayMay | 67 | 36° | 27° | 30.1° | 7.6 h | 8 | 53 |
| JuneJun | 70 | 36° | 27° | 29.6° | 7.1 h | 3 | 18 |
| JulyJul | 67 | 36° | 26° | 29.1° | 6.6 h | 6 | 30 |
| AugustAug | 64 | 36° | 26° | 28.9° | 6.8 h | 8 | 50 |
| SeptemberSep | 63 | 35° | 25° | 28.9° | 6.6 h | 10 | 57 |
| OctoberOct | 61 | 33° | 25° | 29.1° | 6.0 h | 19 | 201 |
| NovemberNov | 66 | 30° | 24° | 28.7° | 4.7 h | 24 | 330 |
| DecemberDec | 66 | 29° | 24° | 27.6° | 4.9 h | 21 | 279 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
8.58° N, 81.23° E · 10 m · Asia/Colombo
Sea temperature in Trincomalee
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 28.7 – 29.4 °C
Swimming season: all year
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Trincomalee ranges from 27.0 °C in January to 30.1 °C in May. At 20 °C and more, the sea is warm enough for swimming all year round.
The sea temperature varies from year to year: in May, eight out of ten years were between 29.7 and 30.7 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 27.0° | 26.4° | 27.7° | warm |
| FebruaryFeb | 27.7° | 27.0° | 28.4° | warm |
| MarchMar | 28.8° | 28.4° | 29.2° | warm |
| AprilApr | 29.9° | 29.5° | 30.4° | very warm |
| MayMay | 30.1° | 29.7° | 30.7° | very warm |
| JuneJun | 29.6° | 29.0° | 30.2° | very warm |
| JulyJul | 29.1° | 28.8° | 29.6° | very warm |
| AugustAug | 28.9° | 28.4° | 29.3° | warm |
| SeptemberSep | 28.9° | 28.6° | 29.2° | warm |
| OctoberOct | 29.1° | 28.7° | 29.4° | very warm |
| NovemberNov | 28.7° | 28.2° | 29.2° | warm |
| DecemberDec | 27.6° | 27.1° | 28.2° | warm |
Sunshine hours in Trincomalee
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 6.0 of 11.9 hours of daylight in Trincomalee, 50 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain in Trincomalee: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Trincomalee has about 19 rainy days with 201 mm of rain in total.
UV index in Trincomalee
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 12 · extremeAvoid the midday sun; SPF 50+, covering clothes, hat and sunglasses.
The sun is strongest in April (UV 14).
Minutes until sunburn in October
- Very fair skin
- about 10 min
- Fair skin
- about 15 min
- Light brown skin
- about 20 min
- Olive skin
- about 25 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind and clouds in Trincomalee
How breezy and how cloudy Trincomalee is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Trincomalee typically peaks at 19 km/h during the day: Beaufort 3, gentle breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting: May – Sep, Dec – Jan.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 74 % of the sky over Trincomalee: mostly cloudy, with about 6.0 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Trincomalee
How often the day gets hot in Trincomalee (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Trincomalee has about 28 hot days, with an average daytime high of 33 °C: hot and muggy. Plan outdoor activities for the morning and evening, drink a lot and take breaks in the cool.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Planning a trip to Trincomalee
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Trincomalee in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Trincomalee has its best school-holiday weather during the Easter holidays (score 77) and its weakest during October half-term (score 61).
- 77
Easter holidays
Mar – Apr
GoodBest holidays
- 33 °C by day
- Sea 30 °C
- 7.9 h of sun a day
- 10 rainy days a month
Good for: Beach & swimming
Keep in mind: Peak heat, Storm season
- 68
May half-term
May – Jun
Good
- 36 °C by day
- Sea 30 °C
- 7.5 h of sun a day
- 7 rainy days a month
Good for: Beach & swimming
Keep in mind: Peak heat, Storm season
- 65
Summer holidays
Jul – Aug
Good
- 36 °C by day
- Sea 29 °C
- 6.7 h of sun a day
- 7 rainy days a month
Good for: Beach & swimming
Keep in mind: Peak heat
- 61
October half-term
Oct
Good
- 33 °C by day
- Sea 29 °C
- 6.0 h of sun a day
- 19 rainy days a month
Keep in mind: Frequent rain, Storm season
- 70
Christmas holidays
Dec – Jan
Good
- 29 °C by day
- Sea 27 °C
- 5.4 h of sun a day
- 18 rainy days a month
Keep in mind: Frequent rain, Storm season
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 11 h
- Distance
- 8,690 km
- Time zone
- UTC+5:30
- Jet lag
- About 5 days (5 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Storm season
Trincomalee lies in an area that cyclones from the northern Indian Ocean can reach. The cyclone season runs from April to June and from October to December, with most storms in May and in November. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January
- February
- March
- April: Season
- May: Peak
- June: Season
- July
- August
- September
- October: Season
- November: Peak
- December: Season
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM, Fiji Meteorological Service); not a forecast.
Compare & alternatives
Trincomalee compared
Put Trincomalee side by side with another destination.
Trincomalee vs Polonnaruwa
In October Trincomalee has the better holiday weather (score 61 vs 54). During the day it is about as warm in Polonnaruwa as in Trincomalee.
| in October | Trincomalee | Polonnaruwa |
|---|---|---|
| Holiday weather score | 61 | 54 |
| Daytime high | 33° | 33° |
| Sea | 29° | no sea nearby |
| Sunshine | 6 h | 6 h |
| Rainy days | 19 | 17 |
| Best time | Feb – Apr, Jun | Jan – Feb |
Through the year
Sri Lanka in October: the best places
In October, Trincomalee ranks 8 of 17 destinations in this country.
- Hambantota31°28°69
- 2Galle30°28°69
- 3Mirissa30°28°69
- 4Batticaloa32°29°66
- 5Negombo31°28°66
- 6Sri Jayawardenepura Kotte31°28°65
- 7Bentota30°28°65
- 8TrincomaleeThis page33°29°61
Near Trincomalee
Other destinations close by.
Places with a climate like Trincomalee
Destinations whose weather through the year is closest to Trincomalee's – good alternatives.
Frequently asked questions about Trincomalee
When is the best time to visit Trincomalee?
The best time to visit Trincomalee is from February to April and in June. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Trincomalee?
The sea temperature in Trincomalee ranges from 27.0 °C in January to 30.1 °C in May. At 20 °C and more, the sea is warm enough for swimming all year round.
Can you swim in Trincomalee in October?
Yes. In October the sea averages 29.1 °C – almost as warm as a bath.
What is the warmest month in Trincomalee?
June is the warmest month, with average highs of 36 °C and nights around 27 °C. December is the coolest month at 29 °C.
When does it rain most in Trincomalee?
The rainy season is from October to January; the wettest month is November with 330 mm. The driest month is June with 18 mm.
How many hours of sunshine does Trincomalee get?
Trincomalee gets around 2,390 hours of sunshine a year. The sunniest month is April with 7.9 hours a day; in November there are 4.7 hours a day.
What time zone is Trincomalee in?
Trincomalee is on UTC+5:30 all year.
How long is the flight from London to Trincomalee?
A nonstop flight from London to Trincomalee takes about 11 h, for a straight-line distance of about 8,690 km.
When is cyclone season in Trincomalee?
Trincomalee lies in an area that cyclones from the northern Indian Ocean can reach. The cyclone season runs from April to June and from October to December, with most storms in May and in November. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Which school holidays are best for Trincomalee?
Trincomalee has its best school-holiday weather during the Easter holidays (score 77) and its weakest during October half-term (score 61). Holiday ratings (0–100): Easter holidays 77, May half-term 68, summer holidays 65, October half-term 61, Christmas holidays 70.