Beach town in Southern Province, Sri Lanka
Mirissa weather by month and the best time to visit
When to go to Mirissa
Whale season runs Nov–Apr, with calm seas Dec–Mar. May–Oct brings rough water, heavy rain and few boat trips.
Mirissa weather by month
Average daily high, rainfall and conditions.
- Jan29°95 mm
- Feb30°79 mm
- Mar30°107 mm
- Apr30°182 mm
- May29°194 mm
- Jun29°106 mm
- Jul28°89 mm
- Aug29°115 mm
- Sep29°161 mm
- Oct29°231 mm
- Nov28°285 mm
- Dec28°193 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 29°C84°F | 24°C76°F | 95 mm | 79% | Pleasant |
| February | 30°C85°F | 25°C76°F | 79 mm | 78% | Pleasant |
| March | 30°C86°F | 26°C78°F | 107 mm | 78% | Pleasant |
| April | 30°C86°F | 27°C80°F | 182 mm | 81% | Rainy |
| May | 29°C85°F | 27°C80°F | 194 mm | 84% | Rainy |
| June | 29°C84°F | 26°C80°F | 106 mm | 85% | Pleasant |
| July | 28°C83°F | 26°C79°F | 89 mm | 85% | Pleasant |
| August | 29°C83°F | 26°C79°F | 115 mm | 84% | Pleasant |
| September | 29°C83°F | 26°C79°F | 161 mm | 83% | Rainy |
| October | 29°C83°F | 26°C78°F | 231 mm | 84% | Rainy |
| November | 28°C83°F | 26°C78°F | 285 mm | 83% | Rainy |
| December | 28°C83°F | 25°C77°F | 193 mm | 82% | Rainy |
Best months across Sri Lanka
| Place | Best months | Warmest month |
|---|---|---|
| Ella | Jan–Mar, Jul–Aug | Aug (27°C) |
| Colombo | Dec–Mar | Mar (31°C) |
| Kandy | Jan–Apr | Apr (30°C) |
| Galle | Dec–Mar | Mar (29°C) |
| Mirissa | Dec–Mar | Mar (30°C) |
| Weligama | Nov–Mar | Mar (30°C) |
| Arugam Bay | May–Sep | Aug (32°C) |
| Sigiriya | Jan–Mar, Jul–Sep | Apr (32°C) |
| Unawatuna | Dec–Mar | Mar (29°C) |
| Hikkaduwa | Dec–Mar | Mar (29°C) |
| Nuwara Eliya | Feb–Apr, Aug | Mar (20°C) |
| Negombo | Dec–Mar | Mar (31°C) |
| Ahangama | Nov–Mar | Mar (30°C) |
| Hiriketiya | Nov–Mar | Mar (30°C) |
| Trincomalee | May–Sep | Aug (32°C) |
| Bentota | Dec–Apr | Mar (30°C) |
| Tangalle | Dec–Apr | Mar (30°C) |
| Jaffna | Feb–Mar, Jul–Aug | Apr (32°C) |
Quick answers
What is the best month to visit Mirissa?
Dec–Mar. Whale season runs Nov–Apr, with calm seas Dec–Mar. May–Oct brings rough water, heavy rain and few boat trips.
When is the rainy season in Mirissa?
Rain peaks in November with about 285 mm. Months with 150 mm or more: Apr–May, Sep–Dec.
What is the hottest month in Mirissa?
March, with average highs of 30°C (86°F).
How cold does Mirissa get?
The coolest nights are in January, averaging 24°C (76°F).
More about Mirissa
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Sources
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.