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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 (°F)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max temperature (daytime) | 86 |
86 |
88 |
88 |
86 |
86 |
86 |
84 |
84 |
84 |
86 |
84 |
| Min temperature (night-time) | 72 |
73 |
75 |
75 |
77 |
77 |
75 |
75 |
75 |
75 |
73 |
73 |
| Heat & Humidity | H |
H |
H |
VH |
H |
H |
H |
H |
H |
H |
H |
H |
| Sea temperature | 82 |
82 |
84 |
84 |
84 |
82 |
81 |
81 |
82 |
82 |
84 |
82 |
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 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
| UV Index (Maximum) | 11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
11 |
Rainfall in Mirissa Beach
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of days with some rain | 5 |
5 |
7 |
11 |
11 |
11 |
9 |
9 |
11 |
13 |
14 |
10 |
| Average monthly rainfall (inches) | 3.5 |
3.6 |
4.3 |
8.1 |
10.2 |
6.8 |
6.8 |
5.9 |
8.5 |
12.0 |
10.9 |
6.7 |
More about Mirissa Beach
Mirissa Beach by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Sri Lanka
Expires at 23:59 on Tuesday 2nd Dec 2025 · View all TUI offers
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 86°F 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 3.5 inches of rainfall in the month.
- 86°F max day temperature
86 - 7 hours of sunshine per day
- 5 days with some rainfall
5 - 72°F min night temperature
72 - 12 hours of daylight per day
12 - High heat & humidity
H - 3.5 inches of monthly rainfall
3.5 - 11+ (Extreme) UV index
11 - 82°F sea temperature
82
Mirissa Beach weather in February
Expect daytime maximum temperatures of 86°F 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 3.6 inches of rainfall in the month.
- 86°F max day temperature
86 - 8 hours of sunshine per day
- 5 days with some rainfall
5 - 73°F min night temperature
73 - 12 hours of daylight per day
12 - High heat & humidity
H - 3.6 inches of monthly rainfall
3.6 - 11+ (Extreme) UV index
11 - 82°F sea temperature
82
Mirissa Beach weather in March
Expect daytime maximum temperatures of 88°F 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 4.3 inches of rainfall in the month.
- 88°F max day temperature
88 - 8 hours of sunshine per day
- 7 days with some rainfall
7 - 75°F min night temperature
75 - 12 hours of daylight per day
12 - High heat & humidity
H - 4.3 inches of monthly rainfall
4.3 - 11+ (Extreme) UV index
11 - 84°F sea temperature
84
Mirissa Beach weather in April
Expect daytime maximum temperatures of 88°F 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 8.1 inches of rainfall in the month.
- 88°F max day temperature
88 - 7 hours of sunshine per day
- 11 days with some rainfall
11 - 75°F min night temperature
75 - 12 hours of daylight per day
12 - Very High heat & humidity
VH - 8.1 inches of monthly rainfall
8.1 - 11+ (Extreme) UV index
11 - 84°F sea temperature
84
Mirissa Beach weather in May
Expect daytime maximum temperatures of 86°F 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 10.2 inches of rainfall in the month.
- 86°F max day temperature
86 - 6 hours of sunshine per day
- 11 days with some rainfall
11 - 77°F min night temperature
77 - 12 hours of daylight per day
12 - High heat & humidity
H - 10.2 inches of monthly rainfall
10.2 - 11+ (Extreme) UV index
11 - 84°F sea temperature
84
Mirissa Beach weather in June
Expect daytime maximum temperatures of 86°F 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 6.8 inches of rainfall in the month.
- 86°F max day temperature
86 - 6 hours of sunshine per day
- 11 days with some rainfall
11 - 77°F min night temperature
77 - 12 hours of daylight per day
12 - High heat & humidity
H - 6.8 inches of monthly rainfall
6.8 - 11+ (Extreme) UV index
11 - 82°F sea temperature
82
Mirissa Beach weather in July
Expect daytime maximum temperatures of 86°F 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 6.8 inches of rainfall in the month.
- 86°F max day temperature
86 - 6 hours of sunshine per day
- 9 days with some rainfall
9 - 75°F min night temperature
75 - 12 hours of daylight per day
12 - High heat & humidity
H - 6.8 inches of monthly rainfall
6.8 - 11+ (Extreme) UV index
11 - 81°F sea temperature
81
Mirissa Beach weather in August
Expect daytime maximum temperatures of 84°F 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 5.9 inches of rainfall in the month.
- 84°F max day temperature
84 - 6 hours of sunshine per day
- 9 days with some rainfall
9 - 75°F min night temperature
75 - 12 hours of daylight per day
12 - High heat & humidity
H - 5.9 inches of monthly rainfall
5.9 - 11+ (Extreme) UV index
11 - 81°F sea temperature
81
Mirissa Beach weather in September
Expect daytime maximum temperatures of 84°F 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 8.5 inches of rainfall in the month.
- 84°F max day temperature
84 - 6 hours of sunshine per day
- 11 days with some rainfall
11 - 75°F min night temperature
75 - 12 hours of daylight per day
12 - High heat & humidity
H - 8.5 inches of monthly rainfall
8.5 - 11+ (Extreme) UV index
11 - 82°F sea temperature
82
Mirissa Beach weather in October
Expect daytime maximum temperatures of 84°F 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 12.0 inches of rainfall in the month.
- 84°F max day temperature
84 - 6 hours of sunshine per day
- 13 days with some rainfall
13 - 75°F min night temperature
75 - 12 hours of daylight per day
12 - High heat & humidity
H - 12.0 inches of monthly rainfall
12.0 - 11+ (Extreme) UV index
11 - 82°F sea temperature
82
Mirissa Beach weather in November
Expect daytime maximum temperatures of 86°F 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 10.9 inches of rainfall in the month.
- 86°F max day temperature
86 - 6 hours of sunshine per day
- 14 days with some rainfall
14 - 73°F min night temperature
73 - 12 hours of daylight per day
12 - High heat & humidity
H - 10.9 inches of monthly rainfall
10.9 - 11 (Extreme) UV index
11 - 84°F sea temperature
84
Mirissa Beach weather in December
Expect daytime maximum temperatures of 84°F 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 6.7 inches of rainfall in the month.
- 84°F max day temperature
84 - 6 hours of sunshine per day
- 10 days with some rainfall
10 - 73°F min night temperature
73 - 12 hours of daylight per day
12 - High heat & humidity
H - 6.7 inches of monthly rainfall
6.7 - 11 (Extreme) UV index
11 - 82°F sea temperature
82
More about Mirissa Beach
Mirissa Beach by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Sri Lanka
- 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
Expires at 23:59 on Tuesday 2nd Dec 2025 · View all TUI offers
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) | Imperial (°F)
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 (°F)
Metric (°C) | Imperial (°F)
Compare more Mirissa Beach weather >>
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