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Mirissa Weather in August
Mirissa in August averages 29°C (84°F) during the day and 25°C (77°F) at night. August is part of the rainy season, so frequent rainfall is typical.
Rainfall in Mirissa in August
As part of the rainy season, Mirissa sees around 9 days of rain in August, with an average of 179 mm (7 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Mirissa in August
In August, Mirissa gets high temperatures, with highs of 29°C (84°F). Nights cool to around 25°C (77°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights stay warm at around 25°C (77°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Mirissa in August
With approximately 201 hours of sunshine, the days are filled with clear skies during the day. Rain typically falls in the afternoon or evening, keeping mornings and early parts of the day sunny.If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Mirissa.
Mirissa Temperature in August
Min Temperature
25°C (77°F)
Max Temperature
29°C (84°F)
Chance of Rain
31%
Precipitation
179 mm (7 in)
Rainy days
9 days
Sunshine
201 hours *
Percentage Sunshine
*
* Data from: Galle, Sri Lanka (29 KM, 18 Miles).
Mirissa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mirissa - and find the best time to visit.
Daily Historical Temperatures
44-year average (1976-2025)
Based on our historical records, temperatures in Mirissa typically stay consistent throughout August, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in August
Daily Historical Precipitation
44-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather records for Mirissa in August
Browse day-by-day weather records for Mirissa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mirissa historical weather extremes in August
The extremes listed below come from historical weather data collected in Mirissa from 2003 through 2026.
- The warmest day in August was on August 9, 2024, with a maximum of 37°C (99°F).
- The coldest August day was on August 3, 2026, with a maximum of 26°C (79°F).
- Mirissa registered its coldest August night on August 6, 2021, with temperatures dropping to 13°C (55°F).
- The wettest August day on record brought 112 mm (4.4 in) of precipitation to Mirissa (August 22, 2014).
Best Places in Sri Lanka in August
Find out more about the weather in Sri Lanka and which places have the best travel conditions in this month. See all of Sri Lanka in August →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Mirissa in August
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Mirissa in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming8/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Mirissa 3-Day Forecast
More climate data for Mirissa
See the full Mirissa climate overview or explore weather in Sri Lanka.
Popular in August
Where to go in August - average daytime high across popular destinations.
Colombo
30°C (86°F) Negombo30°C (86°F) Mirissa29°C (84°F) Unawatuna29°C (84°F) Hikkaduwa29°C (84°F) Galle29°C (84°F) Kandy
29°C (84°F) Nuwara Eliya28°C (82°F) Bucket list
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