, hot all year round, with a rainy season from October to February, while in the rest of the year the rains are quite rare.
The city is located on the east coast of Sri Lanka, in the Eastern Province, at 8 degrees north latitude.
To the north is Uppuveli Beach, while further north are Nilaveli and Pigeon Island, where there is a coral reef.
, which runs from May to September, because it is protected by the mountains found in the interior of Sri Lanka. However, the rains are quite irregular from one year to another, and sometimes, especially in May, there can be heavy rains.
The relatively cooler period is from November to February. By March the temperature rises, and until October, before the rains, it can be very hot. The hottest period is that of the southwest monsoon, which here brings hot, dry air from inland areas.
. Typically, on the Indian Ocean north of the Equator, cyclones occur from April to December, although Sri Lanka is usually only affected in November and December, and more rarely in May. In fact, usually in mid-May, sometimes there can be heavy rains, caused by cyclones that form in the Bay of Bengal, even if they are at the beginning of their life. However, since the sea is warm all year round, in theory they can also form from January to March, perhaps in a light form (such as tropical storms).
The best time to visit Trincomalee is from March to August, being the dry season. It must be said that from May to August it is very hot. May is generally a dry month, but sometimes, in the middle of the month, it can rain a lot due to the passage of a tropical cyclone at some, distance in the Bay of Bengal.
In March, it can rain a lot in some years, especially at the beginning of the month. In September, there are long dry periods, but sometimes it can rain a lot.
The worst months are November and December, as they are the wettest, plus there is a risk that cyclones will pass.
. Here are the average temperatures.
January is generally a warm to hot, muggy month. The average temperature is of
26.4 °C, with a minimum of
24 °C and a maximum of
28.9 °C.

On the coldest nights of the month, the temperature usually drops to around
20 °C.

On the warmest days of the month, the temperature usually reaches around
31 °C.

Precipitation amounts to
152.4 mm, distributed over 8 days.
The day lasts on average 11 hours and 40 minutes.

There are on average 8.5 hours of sunshine per day. So, the sun shines 71% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is of
6.9 kph.

The average sea temperature is of
27.3 °C. Therefore, the sea is pleasantly warm and allows long swims.
February is generally a warm to hot, muggy month. The average temperature is of
27.2 °C, with a minimum of
24.3 °C and a maximum of
30.1 °C.

On the coldest nights of the month, the temperature usually drops to around
21.5 °C.

On the warmest days of the month, the temperature usually reaches around
32 °C.

Precipitation amounts to
96.1 mm, distributed over 5 days.
The day lasts on average 11 hours and 55 minutes.

There are on average 9.5 hours of sunshine per day. So, the sun shines 80% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is of
6.4 kph.

The average sea temperature is of
27.8 °C. Therefore, the sea is pleasantly warm and allows long swims.
March is generally a very hot, muggy month. The average temperature is of
28.2 °C, with a minimum of
24.8 °C and a maximum of
31.7 °C.

On the coldest nights of the month, the temperature usually drops to around
21.5 °C.

On the warmest days of the month, the temperature usually reaches around
34.5 °C.

Precipitation amounts to
54.8 mm, distributed over 4 days.
The day lasts on average 12 hours and 5 minutes.

There are on average 9.5 hours of sunshine per day. So, the sun shines 80% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is of
5.8 kph.

The average sea temperature is of
28.9 °C. Therefore, the sea is pleasantly warm and allows long swims.
April is generally a very hot, muggy month. The average temperature is of
29.4 °C, with a minimum of
25.5 °C and a maximum of
33.4 °C.

On the coldest nights of the month, the temperature usually drops to around
22.5 °C.

On the warmest days of the month, the temperature usually reaches around
36.5 °C.

Precipitation amounts to
48.1 mm, distributed over 4 days.
The day lasts on average 12 hours and 20 minutes.

There are on average 9.5 hours of sunshine per day. So, the sun shines 75% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
6 kph.

The average sea temperature is of
30 °C. Therefore, the sea is pleasantly warm and allows long swims.
May is generally a very hot, muggy month. The average temperature is of
30.7 °C, with a minimum of
26.2 °C and a maximum of
35.2 °C.

On the coldest nights of the month, the temperature usually drops to around
23.5 °C.

On the warmest days of the month, the temperature usually reaches around
37.5 °C.

Precipitation amounts to
71.8 mm, distributed over 4 days.
The day lasts on average 12 hours and 30 minutes.

There are on average 8.5 hours of sunshine per day. So, the sun shines 68% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
8.9 kph.

The average sea temperature is of
30 °C. Therefore, the sea is pleasantly warm and allows long swims.
June, the hottest month of the year, is generally a very hot month. The average temperature is of
30.8 °C, with a minimum of
26.3 °C and a maximum of
35.4 °C.

On the coldest nights of the month, the temperature usually drops to around
24.5 °C.

On the warmest days of the month, the temperature usually reaches around
37 °C.

Precipitation amounts to
25.9 mm, distributed over 2 days.
The day lasts on average 12 hours and 35 minutes.

There are on average 7.5 hours of sunshine per day. So, the sun shines 61% of the time.
The average humidity is 67%.
The average wind speed is of
12.1 kph.

The average sea temperature is of
29.4 °C. Therefore, the sea is pleasantly warm and allows long swims.
July is generally a very hot month. The average temperature is of
30.6 °C, with a minimum of
25.8 °C and a maximum of
35.3 °C.

On the coldest nights of the month, the temperature usually drops to around
23 °C.

On the warmest days of the month, the temperature usually reaches around
37.5 °C.

Precipitation amounts to
51 mm, distributed over 3 days.
The day lasts on average 12 hours and 35 minutes.

There are on average 7.5 hours of sunshine per day. So, the sun shines 60% of the time.
The average humidity is 68%.
The average wind speed is of
11.4 kph.

The average sea temperature is of
29.1 °C. Therefore, the sea is pleasantly warm and allows long swims.
August is generally a very hot month. The average temperature is of
30.4 °C, with a minimum of
25.5 °C and a maximum of
35.3 °C.

On the coldest nights of the month, the temperature usually drops to around
23 °C.

On the warmest days of the month, the temperature usually reaches around
37.5 °C.

Precipitation amounts to
66.6 mm, distributed over 4 days.
The day lasts on average 12 hours and 25 minutes.

There are on average 8 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 69%.
The average wind speed is of
10.8 kph.

The average sea temperature is of
28.9 °C. Therefore, the sea is pleasantly warm and allows long swims.
September is generally a very hot, muggy month. The average temperature is of
30 °C, with a minimum of
25.1 °C and a maximum of
34.8 °C.

On the coldest nights of the month, the temperature usually drops to around
22.5 °C.

On the warmest days of the month, the temperature usually reaches around
37.5 °C.

Precipitation amounts to
112.6 mm, distributed over 6 days.
The day lasts on average 12 hours and 10 minutes.

There are on average 7 hours of sunshine per day. So, the sun shines 57% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
8.8 kph.

The average sea temperature is of
28.9 °C. Therefore, the sea is pleasantly warm and allows long swims.
October is generally a very hot, muggy month. The average temperature is of
28.4 °C, with a minimum of
24.5 °C and a maximum of
32.4 °C.

On the coldest nights of the month, the temperature usually drops to around
22.5 °C.

On the warmest days of the month, the temperature usually reaches around
36.5 °C.

Precipitation amounts to
215.6 mm, distributed over 13 days.
The day lasts on average 11 hours and 55 minutes.

There are on average 7 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of
6.8 kph.

The average sea temperature is of
29.1 °C. Therefore, the sea is pleasantly warm and allows long swims.
November is generally a warm to hot, muggy month. The average temperature is of
26.9 °C, with a minimum of
24 °C and a maximum of
29.8 °C.

On the coldest nights of the month, the temperature usually drops to around
21.5 °C.

On the warmest days of the month, the temperature usually reaches around
33 °C.

Precipitation amounts to
375.6 mm, distributed over 18 days.
The day lasts on average 11 hours and 40 minutes.

There are on average 5.5 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is of
5.6 kph.

The average sea temperature is of
28.7 °C. Therefore, the sea is pleasantly warm and allows long swims.
December, the least warm month of the year, is generally a warm to hot, muggy month. The average temperature is of
26.3 °C, with a minimum of
23.8 °C and a maximum of
28.8 °C.

On the coldest nights of the month, the temperature usually drops to around
20.5 °C.

On the warmest days of the month, the temperature usually reaches around
31 °C.

Precipitation amounts to
339 mm, distributed over 15 days.
The day lasts on average 11 hours and 35 minutes.

There are on average 5.5 hours of sunshine per day. So, the sun shines 47% of the time.
The average humidity is 86%. Hence, the air is normally humid.
The average wind speed is of
6.8 kph.

The average sea temperature is of
27.8 °C. Therefore, the sea is pleasantly warm and allows long swims.