Monthly weather forecast and climate
Mirissa, Sri Lanka

A row of palm trees with boats under, along Tropical Beach in Mirissa, Sri Lanka
A row of palm trees with boats under, along Tropical Beach in Mirissa, Sri Lanka

The best time to visit Mirissa

The best months for a swim in Mirissa, Sri Lanka, are January and February, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.

Weather in January

January in Mirissa, Sri Lanka, is a hot winter month, with average temperature fluctuating between 30°C (86°F) and 22°C (71.6°F). The ideal sea water temperature of 28°C (82.4°F) and only 5 rainfall days, with 89mm (3.5") of accumulated rainfall, makes January the best time for swimming and other water activities. Weather in January »

Weather in February

The last month of the winter, February, is also a hot month in Mirissa, Sri Lanka, with average temperature fluctuating between 30°C (86°F) and 23°C (73.4°F). The perfect water temperature of 28°C (82.4°F) with 91mm (3.58") of accumulated rainfall and only 5 rainfall days, makes February a great period for swimming and other water activities. Weather in February »

Weather in March

The first month of the spring, March, is still a tropical month in Mirissa, Sri Lanka, with average temperature varying between 24°C (75.2°F) and 31°C (87.8°F). March and April, with an average high-temperature of 31°C (87.8°F), are the warmest months. Weather in March »

Weather in April

April, like March, is a hot spring month in Mirissa, Sri Lanka, with average temperature ranging between max 31°C (87.8°F) and min 24°C (75.2°F). March and April, with an average high-temperature of 31°C (87.8°F), are the warmest months. Weather in April »

Weather in May

May, the last month of the spring, in Mirissa, is another hot month, with average temperature varying between 30°C (86°F) and 25°C (77°F). In Mirissa, the average high-temperature is essentially the same as in April - a still hot 30°C (86°F). Weather in May »

Weather in June

The first month of the summer, June, is still a tropical month in Mirissa, Sri Lanka, with average temperature varying between 30°C (86°F) and 25°C (77°F). In June, the average high-temperature remains equal as in May - a still tropical 30°C (86°F). Weather in June »

Weather in July

July, like June, is a hot summer month in Mirissa, Sri Lanka, with average temperature varying between 24°C (75.2°F) and 30°C (86°F). In July, the average high-temperature remains equal as in June - a still tropical 30°C (86°F). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Mirissa, Sri Lanka, with average temperature ranging between min 24°C (75.2°F) and max 29°C (84.2°F). The coldest months are August through October and December, with an average high-temperature of 29°C (84.2°F). In Mirissa, during August, the rain falls for 9 days and regularly aggregates up to 149mm (5.87") of precipitation. Weather in August »

Weather in September

September, the first month of the autumn, in Mirissa, is still a warm month, with average temperature ranging between min 24°C (75.2°F) and max 29°C (84.2°F). August through October and December, with an average high-temperature of 29°C (84.2°F), are the coldest months. In Mirissa, Sri Lanka, during September, the rain falls for 11 days and regularly aggregates up to 215mm (8.46") of precipitation. Weather in September »

Weather in October

October, like September, in Mirissa, Sri Lanka, is a moderately hot autumn month, with average temperature fluctuating between 24°C (75.2°F) and 29°C (84.2°F). The coldest months are August through October and December, with an average high-temperature of 29°C (84.2°F). Weather in October »

Weather in November

November, the last month of the autumn, in Mirissa, is a tropical month, with average temperature ranging between min 23°C (73.4°F) and max 30°C (86°F). In Mirissa, the average high-temperature in November is essentially the same as in October - a tropical 30°C (86°F). Weather in November »

Weather in December

The first month of the winter, December, is still a warm month in Mirissa, Sri Lanka, with average temperature fluctuating between 29°C (84.2°F) and 23°C (73.4°F). The coldest months are August through October and December, with an average high-temperature of 29°C (84.2°F). Weather in December »
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FAQ

How much does it rain in Mirissa?

In Mirissa, during the entire year, the rain falls for 116 days and collects up to 2216mm (87.24") of precipitation.

What is the driest month in Mirissa?

The month with the least rainfall in Mirissa is January when the rain falls for 5 days and typically collects 89mm (3.5") of precipitation.

What months are the sea coldest in Mirissa?

January, February, June through October and December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater in Mirissa.

What is the month with the shortest days in Mirissa?

January and December, with an average of 11.8h of daylight, are months with the shortest days.

When is the highest UV index in Mirissa?

Months with the highest UV index are January through October, with an average maximum UV index of 12.

What is the month with the most sunshine in Mirissa?

Months with the most sunshine are February and March, with an average of 8h of sunshine.

What are the warmest months in Mirissa?

Warmest months are March and April, with an average high-temperature of 31°C (87.8°F).

When is the sea warmest in Mirissa?

With an average sea temperature of 30°C (86°F), April is the month with the warmest seawater.

What is the month with the least sunshine in Mirissa?

Months with the least sunshine in Mirissa, Sri Lanka, are May through December, with an average of 6h of sunshine.

When are the longest days in Mirissa?

The month with the longest days is June, with an average of 12.5h of daylight.

What are the coldest months in Mirissa?

August through October and December, with an average high-temperature of 29°C (84.2°F), are the coldest months in Mirissa, Sri Lanka.

What is the rainiest month in Mirissa?

October is the month with the most rainfall in Mirissa, Sri Lanka. Rain falls for 13 days and accumulates 305mm (12.01") of precipitation.

When is the lowest UV index in Mirissa?

Months with the lowest UV index are November and December, with an average maximum UV index of 11.

Average temperature
Mirissa, Sri Lanka

Average temperature - Mirissa, Sri Lanka

The warmest months (with the highest average high temperature) are March and April (31°C).
Months with the lowest average high temperature are August, September, October and December (29°C).

Months with the highest average low temperature are May and June (25°C).
The coldest month (with the lowest average low temperature) is January (22°C).

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Average rainfall
Mirissa, Sri Lanka

Average rainfall - Mirissa, Sri Lanka

The wettest month (with the highest rainfall) is October (305mm).
The driest month (with the least rainfall) is January (89mm).

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Average rainfall days
Mirissa, Sri Lanka

Average rainfall days - Mirissa, Sri Lanka

The month with the highest number of rainy days is November (14 days).
Months with the least rainy days are January and February (5 days).

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Average sea temperature
Mirissa, Sri Lanka

Average sea temperature - Mirissa, Sri Lanka

The best month for swimming (with the highest average sea temperature) is April (30°C).
The coldest months (with the lowest average sea temperature) are January, February, June, July, August, September, October and December (28°C).

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Average daylight / Average sunshine
Mirissa, Sri Lanka

Average daylight / Average sunshine - Mirissa, Sri Lanka

The month with the longest days is June (Average daylight: 12.5h).
Months with the shortest days are January and December (Average daylight: 11.8h).

Months with the most sunshine are February and March (Average sunshine: 8h).
Months with the least sunshine are May, June, July, August, September, October, November and December (Average sunshine: 6).

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Average UV index
Mirissa, Sri Lanka

Average UV index - Mirissa, Sri Lanka

Months with the highest UV index are January, February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are November and December (UV index 11).

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