Mirissa Beach weather by month

Check out Mirissa Beach weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Mirissa Beach (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
30°C maximum daytime temperature in January in Mirissa Beach30
30°C maximum daytime temperature in February in Mirissa Beach30
31°C maximum daytime temperature in March in Mirissa Beach31
31°C maximum daytime temperature in April in Mirissa Beach31
30°C maximum daytime temperature in May in Mirissa Beach30
30°C maximum daytime temperature in June in Mirissa Beach30
30°C maximum daytime temperature in July in Mirissa Beach30
29°C maximum daytime temperature in August in Mirissa Beach29
29°C maximum daytime temperature in September in Mirissa Beach29
29°C maximum daytime temperature in October in Mirissa Beach29
30°C maximum daytime temperature in November in Mirissa Beach30
29°C maximum daytime temperature in December in Mirissa Beach29
Min temperature (night-time)
22°C minimum night-time temperature in January in Mirissa Beach22
23°C minimum night-time temperature in February in Mirissa Beach23
24°C minimum night-time temperature in March in Mirissa Beach24
24°C minimum night-time temperature in April in Mirissa Beach24
25°C minimum night-time temperature in May in Mirissa Beach25
25°C minimum night-time temperature in June in Mirissa Beach25
24°C minimum night-time temperature in July in Mirissa Beach24
24°C minimum night-time temperature in August in Mirissa Beach24
24°C minimum night-time temperature in September in Mirissa Beach24
24°C minimum night-time temperature in October in Mirissa Beach24
23°C minimum night-time temperature in November in Mirissa Beach23
23°C minimum night-time temperature in December in Mirissa Beach23
Heat & Humidity
High heat & humidity in January in Mirissa BeachH
High heat & humidity in February in Mirissa BeachH
High heat & humidity in March in Mirissa BeachH
Very high heat & humidity in April in Mirissa BeachVH
High heat & humidity in May in Mirissa BeachH
High heat & humidity in June in Mirissa BeachH
High heat & humidity in July in Mirissa BeachH
High heat & humidity in August in Mirissa BeachH
High heat & humidity in September in Mirissa BeachH
High heat & humidity in October in Mirissa BeachH
High heat & humidity in November in Mirissa BeachH
High heat & humidity in December in Mirissa BeachH
Sea temperature
28°C sea temperature in January in Mirissa Beach28
28°C sea temperature in February in Mirissa Beach28
29°C sea temperature in March in Mirissa Beach29
29°C sea temperature in April in Mirissa Beach29
29°C sea temperature in May in Mirissa Beach29
28°C sea temperature in June in Mirissa Beach28
27°C sea temperature in July in Mirissa Beach27
27°C sea temperature in August in Mirissa Beach27
28°C sea temperature in September in Mirissa Beach28
28°C sea temperature in October in Mirissa Beach28
29°C sea temperature in November in Mirissa Beach29
28°C sea temperature in December in Mirissa Beach28

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Mirissa Beach

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
12 hours of daylight per day in January in Mirissa Beach12
12 hours of daylight per day in February in Mirissa Beach12
12 hours of daylight per day in March in Mirissa Beach12
12 hours of daylight per day in April in Mirissa Beach12
12 hours of daylight per day in May in Mirissa Beach12
12 hours of daylight per day in June in Mirissa Beach12
12 hours of daylight per day in July in Mirissa Beach12
12 hours of daylight per day in August in Mirissa Beach12
12 hours of daylight per day in September in Mirissa Beach12
12 hours of daylight per day in October in Mirissa Beach12
12 hours of daylight per day in November in Mirissa Beach12
12 hours of daylight per day in December in Mirissa Beach12
UV Index (Maximum)
UV (maximum) index 11+ (Extreme) in January in Mirissa Beach11
UV (maximum) index 11+ (Extreme) in February in Mirissa Beach11
UV (maximum) index 11+ (Extreme) in March in Mirissa Beach11
UV (maximum) index 11+ (Extreme) in April in Mirissa Beach11
UV (maximum) index 11+ (Extreme) in May in Mirissa Beach11
UV (maximum) index 11+ (Extreme) in June in Mirissa Beach11
UV (maximum) index 11+ (Extreme) in July in Mirissa Beach11
UV (maximum) index 11+ (Extreme) in August in Mirissa Beach11
UV (maximum) index 11+ (Extreme) in September in Mirissa Beach11
UV (maximum) index 11+ (Extreme) in October in Mirissa Beach11
UV (maximum) index 11 (Extreme) in November in Mirissa Beach11
UV (maximum) index 11 (Extreme) in December in Mirissa Beach11

Rainfall in Mirissa Beach

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
5 days with some rainfall in January in Mirissa Beach5
5 days with some rainfall in February in Mirissa Beach5
7 days with some rainfall in March in Mirissa Beach7
11 days with some rainfall in April in Mirissa Beach11
11 days with some rainfall in May in Mirissa Beach11
11 days with some rainfall in June in Mirissa Beach11
9 days with some rainfall in July in Mirissa Beach9
9 days with some rainfall in August in Mirissa Beach9
11 days with some rainfall in September in Mirissa Beach11
13 days with some rainfall in October in Mirissa Beach13
14 days with some rainfall in November in Mirissa Beach14
10 days with some rainfall in December in Mirissa Beach10
Average monthly rainfall (mm)
89 mm monthly rainfall in January in Mirissa Beach89
91 mm monthly rainfall in February in Mirissa Beach91
109 mm monthly rainfall in March in Mirissa Beach109
207 mm monthly rainfall in April in Mirissa Beach207
258 mm monthly rainfall in May in Mirissa Beach258
173 mm monthly rainfall in June in Mirissa Beach173
173 mm monthly rainfall in July in Mirissa Beach173
149 mm monthly rainfall in August in Mirissa Beach149
215 mm monthly rainfall in September in Mirissa Beach215
305 mm monthly rainfall in October in Mirissa Beach305
276 mm monthly rainfall in November in Mirissa Beach276
171 mm monthly rainfall in December in Mirissa Beach171

More about Mirissa Beach

Mirissa Beach by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Sri Lanka (Mirissa Beach) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Mirissa Beach?

Mirissa Beach has a hot tropical climate with no dry season.

Mirissa Beach weather in January

Expect daytime maximum temperatures of 30°C in Mirissa Beach, Sri Lanka in January and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 89 mm of rainfall in the month.

  • 30°C maximum daytime temperature in January in Mirissa Beach30
    30°C max day temperature
  • 7 hours of sunshine per day
  • 5 days with some rainfall in January in Mirissa Beach5
    5 days with some rainfall
  • 22°C minimum night-time temperature in January in Mirissa Beach22
    22°C min night temperature
  • 12 hours of daylight per day in January in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in January in Mirissa BeachH
    High heat & humidity
  • 89 mm monthly rainfall in January in Mirissa Beach89
    89 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in January in Mirissa Beach11
    11+ (Extreme) UV index
  • 28°C sea temperature in January in Mirissa Beach28
    28°C sea temperature

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Mirissa Beach weather in February

Expect daytime maximum temperatures of 30°C in Mirissa Beach, Sri Lanka in February and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 91 mm of rainfall in the month.

  • 30°C maximum daytime temperature in February in Mirissa Beach30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 5 days with some rainfall in February in Mirissa Beach5
    5 days with some rainfall
  • 23°C minimum night-time temperature in February in Mirissa Beach23
    23°C min night temperature
  • 12 hours of daylight per day in February in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in February in Mirissa BeachH
    High heat & humidity
  • 91 mm monthly rainfall in February in Mirissa Beach91
    91 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in February in Mirissa Beach11
    11+ (Extreme) UV index
  • 28°C sea temperature in February in Mirissa Beach28
    28°C sea temperature

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Mirissa Beach weather in March

Expect daytime maximum temperatures of 31°C in Mirissa Beach, Sri Lanka in March and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 109 mm of rainfall in the month.

  • 31°C maximum daytime temperature in March in Mirissa Beach31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 7 days with some rainfall in March in Mirissa Beach7
    7 days with some rainfall
  • 24°C minimum night-time temperature in March in Mirissa Beach24
    24°C min night temperature
  • 12 hours of daylight per day in March in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in March in Mirissa BeachH
    High heat & humidity
  • 109 mm monthly rainfall in March in Mirissa Beach109
    109 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in March in Mirissa Beach11
    11+ (Extreme) UV index
  • 29°C sea temperature in March in Mirissa Beach29
    29°C sea temperature

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Mirissa Beach weather in April

Expect daytime maximum temperatures of 31°C in Mirissa Beach, Sri Lanka in April and very high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 207 mm of rainfall in the month.

  • 31°C maximum daytime temperature in April in Mirissa Beach31
    31°C max day temperature
  • 7 hours of sunshine per day
  • 11 days with some rainfall in April in Mirissa Beach11
    11 days with some rainfall
  • 24°C minimum night-time temperature in April in Mirissa Beach24
    24°C min night temperature
  • 12 hours of daylight per day in April in Mirissa Beach12
    12 hours of daylight per day
  • Very high heat & humidity in April in Mirissa BeachVH
    Very High heat & humidity
  • 207 mm monthly rainfall in April in Mirissa Beach207
    207 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in April in Mirissa Beach11
    11+ (Extreme) UV index
  • 29°C sea temperature in April in Mirissa Beach29
    29°C sea temperature

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Mirissa Beach weather in May

Expect daytime maximum temperatures of 30°C in Mirissa Beach, Sri Lanka in May and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 258 mm of rainfall in the month.

  • 30°C maximum daytime temperature in May in Mirissa Beach30
    30°C max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in May in Mirissa Beach11
    11 days with some rainfall
  • 25°C minimum night-time temperature in May in Mirissa Beach25
    25°C min night temperature
  • 12 hours of daylight per day in May in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in May in Mirissa BeachH
    High heat & humidity
  • 258 mm monthly rainfall in May in Mirissa Beach258
    258 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Mirissa Beach11
    11+ (Extreme) UV index
  • 29°C sea temperature in May in Mirissa Beach29
    29°C sea temperature

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Mirissa Beach weather in June

Expect daytime maximum temperatures of 30°C in Mirissa Beach, Sri Lanka in June and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 173 mm of rainfall in the month.

  • 30°C maximum daytime temperature in June in Mirissa Beach30
    30°C max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in June in Mirissa Beach11
    11 days with some rainfall
  • 25°C minimum night-time temperature in June in Mirissa Beach25
    25°C min night temperature
  • 12 hours of daylight per day in June in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in June in Mirissa BeachH
    High heat & humidity
  • 173 mm monthly rainfall in June in Mirissa Beach173
    173 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in June in Mirissa Beach11
    11+ (Extreme) UV index
  • 28°C sea temperature in June in Mirissa Beach28
    28°C sea temperature

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Mirissa Beach weather in July

Expect daytime maximum temperatures of 30°C in Mirissa Beach, Sri Lanka in July and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 173 mm of rainfall in the month.

  • 30°C maximum daytime temperature in July in Mirissa Beach30
    30°C max day temperature
  • 6 hours of sunshine per day
  • 9 days with some rainfall in July in Mirissa Beach9
    9 days with some rainfall
  • 24°C minimum night-time temperature in July in Mirissa Beach24
    24°C min night temperature
  • 12 hours of daylight per day in July in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in July in Mirissa BeachH
    High heat & humidity
  • 173 mm monthly rainfall in July in Mirissa Beach173
    173 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in July in Mirissa Beach11
    11+ (Extreme) UV index
  • 27°C sea temperature in July in Mirissa Beach27
    27°C sea temperature

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Mirissa Beach weather in August

Expect daytime maximum temperatures of 29°C in Mirissa Beach, Sri Lanka in August and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 149 mm of rainfall in the month.

  • 29°C maximum daytime temperature in August in Mirissa Beach29
    29°C max day temperature
  • 6 hours of sunshine per day
  • 9 days with some rainfall in August in Mirissa Beach9
    9 days with some rainfall
  • 24°C minimum night-time temperature in August in Mirissa Beach24
    24°C min night temperature
  • 12 hours of daylight per day in August in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in August in Mirissa BeachH
    High heat & humidity
  • 149 mm monthly rainfall in August in Mirissa Beach149
    149 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Mirissa Beach11
    11+ (Extreme) UV index
  • 27°C sea temperature in August in Mirissa Beach27
    27°C sea temperature

Back to months

Mirissa Beach weather in September

Expect daytime maximum temperatures of 29°C in Mirissa Beach, Sri Lanka in September and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 215 mm of rainfall in the month.

  • 29°C maximum daytime temperature in September in Mirissa Beach29
    29°C max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in September in Mirissa Beach11
    11 days with some rainfall
  • 24°C minimum night-time temperature in September in Mirissa Beach24
    24°C min night temperature
  • 12 hours of daylight per day in September in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in September in Mirissa BeachH
    High heat & humidity
  • 215 mm monthly rainfall in September in Mirissa Beach215
    215 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Mirissa Beach11
    11+ (Extreme) UV index
  • 28°C sea temperature in September in Mirissa Beach28
    28°C sea temperature

Back to months

Mirissa Beach weather in October

Expect daytime maximum temperatures of 29°C in Mirissa Beach, Sri Lanka in October and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 13 days with some rainfall and typically 305 mm of rainfall in the month.

  • 29°C maximum daytime temperature in October in Mirissa Beach29
    29°C max day temperature
  • 6 hours of sunshine per day
  • 13 days with some rainfall in October in Mirissa Beach13
    13 days with some rainfall
  • 24°C minimum night-time temperature in October in Mirissa Beach24
    24°C min night temperature
  • 12 hours of daylight per day in October in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in October in Mirissa BeachH
    High heat & humidity
  • 305 mm monthly rainfall in October in Mirissa Beach305
    305 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in October in Mirissa Beach11
    11+ (Extreme) UV index
  • 28°C sea temperature in October in Mirissa Beach28
    28°C sea temperature

Back to months

Mirissa Beach weather in November

Expect daytime maximum temperatures of 30°C in Mirissa Beach, Sri Lanka in November and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 14 days with some rainfall and typically 276 mm of rainfall in the month.

  • 30°C maximum daytime temperature in November in Mirissa Beach30
    30°C max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in November in Mirissa Beach14
    14 days with some rainfall
  • 23°C minimum night-time temperature in November in Mirissa Beach23
    23°C min night temperature
  • 12 hours of daylight per day in November in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in November in Mirissa BeachH
    High heat & humidity
  • 276 mm monthly rainfall in November in Mirissa Beach276
    276 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in November in Mirissa Beach11
    11 (Extreme) UV index
  • 29°C sea temperature in November in Mirissa Beach29
    29°C sea temperature

Back to months

Mirissa Beach weather in December

Expect daytime maximum temperatures of 29°C in Mirissa Beach, Sri Lanka in December and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 10 days with some rainfall and typically 171 mm of rainfall in the month.

  • 29°C maximum daytime temperature in December in Mirissa Beach29
    29°C max day temperature
  • 6 hours of sunshine per day
  • 10 days with some rainfall in December in Mirissa Beach10
    10 days with some rainfall
  • 23°C minimum night-time temperature in December in Mirissa Beach23
    23°C min night temperature
  • 12 hours of daylight per day in December in Mirissa Beach12
    12 hours of daylight per day
  • High heat & humidity in December in Mirissa BeachH
    High heat & humidity
  • 171 mm monthly rainfall in December in Mirissa Beach171
    171 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in December in Mirissa Beach11
    11 (Extreme) UV index
  • 28°C sea temperature in December in Mirissa Beach28
    28°C sea temperature

Back to months

More about Mirissa Beach

Mirissa Beach by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Sri Lanka

TUI sale: up to £300 off holidays in 2026/2027

  • Save up to £300 on holidays (Jan 2026-Nov 2027)
  • Book online with TUI Black Friday discount code
  • Sign up to myTUI. Discount varies by spend. T&Cs apply
Go to TUI deal >>

Expires at 23:59 on Tuesday 2nd Dec 2025 · View all TUI offers

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The climate guide for Sri Lanka (Mirissa Beach) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Sri Lanka

Compare Mirissa Beach with the UK

Below the Mirissa Beach chart shows average maximum daytime temperature for Mirissa Beach, Sri Lanka and the UK (London).

Maximum daytime temperature (°C)

Mirissa Beach, Sri Lanka
UK (London)
30
7
30
7
31
10
31
13
30
17
30
20
30
22
29
22
29
19
29
15
30
10
29
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Compare more Mirissa Beach weather >>

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