Select units of measurement for the temperature and rainfall tables (metric or imperial).
Average weather, temperature, rainfall, sunshine hours

The climate of Negombo is
tropical, hot all year round, with a relatively dry season in January and February and two very rainy periods, from April to June and from September to mid-December.
The city is located on the west coast of Sri Lanka, about 30 km (18 mi) north of Colombo.
We are in the rainiest part of the coast, the one that receives abundant rains even in the period that runs from April to June.
Temperatures are quite stable, however, during the day they are a bit higher from January to April. During this period, the temperature gradually increases, and with it showers and thunderstorms, which become frequent in April.
From mid-May to September is the period of the
southwest monsoon, which brings abundant rains especially in the first part (mid-May-mid-June) and in the last one (September). In fact, in July and August, the monsoon moves north and mainly affects India, while in Sri Lanka the rains are not very frequent, however, in Negombo and on the south-west coast, they still amount to around 80/100 mm (3.2/4 in) per month.
From October to mid-December, the rains are frequent and abundant because tropical depressions often form in Sri Lanka.
From mid-December to February, the
north-east monsoon period, is the coolest of the year, especially in the first part, it is also a dry period because we are on the western side, protected by the mountains.
Sri Lanka is in the path of
tropical cyclones. 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).
Best Time
The best time to visit Negombo is from January to late February or mid-March, since it is the dry season.
In the months of July and August, there is another quite good period, in which the rains are relatively rare, however, this depends on the years, moreover, the sun shines less frequently and the sea is often rough, since the wind carried by the monsoon blows from the southwest.
Negombo - Climate data
In Negombo, the
average temperature of the coldest month (December) is of
27 °C, that of the warmest month (May) is of
28.6 °C. Here are the average temperatures.
Negombo - Average temperatures (1991-2020) |
Month | Min | Max | Mean |
---|
January | 22.2 | 32 | 27.1 |
---|
February | 22.6 | 32.7 | 27.6 |
---|
March | 23.8 | 32.7 | 28.2 |
---|
April | 24.6 | 32.4 | 28.5 |
---|
May | 25.6 | 31.7 | 28.6 |
---|
June | 25.6 | 30.8 | 28.2 |
---|
July | 25.6 | 30.6 | 28.1 |
---|
August | 25.5 | 30.6 | 28 |
---|
September | 25 | 30.7 | 27.8 |
---|
October | 24.2 | 30.6 | 27.4 |
---|
November | 23.4 | 30.9 | 27.2 |
---|
December | 22.9 | 31.1 | 27 |
---|
Year | 24.3 | 31.4 | 27.75 |
---|
Precipitation amounts to
2070 millimeters per year: it is therefore abundant. It ranges from
53.6 millimeters in the driest month (January) to
362.2 millimeters in the wettest one (October). Here is the average precipitation.
Negombo - Average precipitationMonth | Days |
---|
January | 54 | 4 |
---|
February | 56 | 4 |
---|
March | 105 | 7 |
---|
April | 216 | 12 |
---|
May | 281 | 15 |
---|
June | 158 | 14 |
---|
July | 92 | 8 |
---|
August | 97 | 8 |
---|
September | 214 | 14 |
---|
October | 362 | 18 |
---|
November | 305 | 16 |
---|
December | 131 | 8 |
---|
Year | 2070 | 128 |
---|
The
sea temperature ranges from
27 °C in August to
29.5 °C in April. Here are the average sea temperatures.
Negombo - Sea temperatureMonth |
---|
January | 27.527.5 |
---|
February | 28 |
---|
March | 29 |
---|
April | 29.5 |
---|
May | 29 |
---|
June | 28 |
---|
July | 27.5 |
---|
August | 27 |
---|
September | 27.5 |
---|
October | 28 |
---|
November | 28.5"> |
---|
December | 28 |
---|
Year | 28.2 |
---|
Negombo - Weather by month
Based on the period 1991-2020
January is generally a warm to hot, muggy month. The average temperature is of
27.1 °C, with a minimum of
22.2 °C and a maximum of
32 °C.

On the coldest nights of the month, the temperature usually drops to around
19 °C.

On the warmest days of the month, the temperature usually reaches around
34 °C.

Precipitation amounts to
53.6 mm, distributed over 4 days.
The day lasts on average 11 hours and 50 minutes.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
14.8 kph.

The average sea temperature is of
27.6 °C. Therefore, the sea is pleasantly warm and allows long swims.
February is generally a very hot, muggy month. The average temperature is of 27.6 °C, with a minimum of 22.6 °C and a maximum of 32.7 °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 35.5 °C.
Precipitation amounts to 56.4 mm, distributed over 4 days.
The day lasts on average 11 hours and 55 minutes.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of 12.3 kph.
The average sea temperature is of 28 °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 23.8 °C and a maximum of 32.7 °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 35 °C.
Precipitation amounts to 105.1 mm, distributed over 7 days.
The day lasts on average 12 hours and 5 minutes.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of 9.7 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 28.5 °C, with a minimum of 24.6 °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 33.5 °C.
Precipitation amounts to 216.1 mm, distributed over 12 days.
The day lasts on average 12 hours and 20 minutes.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is of 9.5 kph.
The average sea temperature is of 29.7 °C. Therefore, the sea is pleasantly warm and allows long swims.
May, the hottest month of the year, is generally a very hot, muggy month. The average temperature is of 28.6 °C, with a minimum of 25.6 °C and a maximum of 31.7 °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 33 °C.
Precipitation amounts to 281.3 mm, distributed over 15 days.
The day lasts on average 12 hours and 30 minutes.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of 13.6 kph.
The average sea temperature is of 29.2 °C. Therefore, the sea is pleasantly warm and allows long swims.
June is generally a very hot, muggy month. The average temperature is of 28.2 °C, with a minimum of 25.6 °C and a maximum of 30.8 °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 32.5 °C.
Precipitation amounts to 157.9 mm, distributed over 14 days.
The day lasts on average 12 hours and 30 minutes.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of 15.4 kph.
The average sea temperature is of 28.1 °C. Therefore, the sea is pleasantly warm and allows long swims.
July is generally a very hot, muggy month. The average temperature is of 28.1 °C, with a minimum of 25.6 °C and a maximum of 30.6 °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 31.5 °C.
Precipitation amounts to 91.7 mm, distributed over 8 days.
The day lasts on average 12 hours and 30 minutes.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of 15.5 kph.
The average sea temperature is of 27.3 °C. Therefore, the sea is pleasantly warm and allows long swims.
August is generally a very hot, muggy month. The average temperature is of 28 °C, with a minimum of 25.5 °C and a maximum of 30.6 °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 31.5 °C.
Precipitation amounts to 96.9 mm, distributed over 8 days.
The day lasts on average 12 hours and 20 minutes.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is of 15.7 kph.
The average sea temperature is of 27.2 °C. Therefore, the sea is pleasantly warm and allows long swims.
September is generally a very hot, muggy month. The average temperature is of 27.8 °C, with a minimum of 25 °C and a maximum of 30.7 °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 32 °C.
Precipitation amounts to 214.4 mm, distributed over 14 days.
The day lasts on average 12 hours and 5 minutes.
The average humidity is 81%. Hence, the air is normally humid.
The average wind speed is of 13.8 kph.
The average sea temperature is of 27.6 °C. Therefore, the sea is pleasantly warm and allows long swims.
October is generally a warm to hot, muggy month. The average temperature is of 27.4 °C, with a minimum of 24.2 °C and a maximum of 30.6 °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 32 °C.
Precipitation amounts to 362.2 mm, distributed over 18 days.
The day lasts on average 12 hours and 0 minutes.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of 10.6 kph.
The average sea temperature is of 28.1 °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 27.2 °C, with a minimum of 23.4 °C and a maximum of 30.9 °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 33.5 °C.
Precipitation amounts to 304.6 mm, distributed over 16 days.
The day lasts on average 11 hours and 50 minutes.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of 9.2 kph.
The average sea temperature is of 28.5 °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 27 °C, with a minimum of 22.9 °C and a maximum of 31.1 °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 33 °C.
Precipitation amounts to 130.8 mm, distributed over 8 days.
The day lasts on average 11 hours and 40 minutes.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is of 13 kph.
The average sea temperature is of 28 °C. Therefore, the sea is pleasantly warm and allows long swims.