SeasonMapMirissa weather in October
Sri Lanka
October in Mirissa: sweltering, soaked, with clean air — fine if you can take 26 rainy days.
#10 of 12 months in Mirissa · #867 of 1383 destinations to visit in October · comfort 70/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Mirissa in October
Other months in Mirissa
Mirissa's forum calls February close to ideal — fewer crowds, good weather, and prime whale-watching season, which regulars say runs November through April. Sightings aren't guaranteed (recent reports put the odds around 50%), though dolphins show up far more reliably; tours head out around 6:45am, and regulars say the earliest departure gives the calmest seas and the best shot.
Add your own note from Mirissa's card on the map.
Mirissa climate normals — October
| Daytime high | 29°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 76°F | |
| Feels like (high) | 35°C / 95°F | |
| Sea temperature | 29°C / 84°F | ♨️ bath-warm |
| Rainfall | 247 mm / 9.7 in | ⛈ soaked |
| Rainy days | 26 days | |
| Humidity | 87% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 12 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Mirissa in October
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Quietschool holidays in 3 of the markets that fill it, one of its worst months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Mirissa's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherMirissa's weather peaks January–March, best around February.
Best weatherFair weatherToughest weather
What's on in Mirissa in October
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Wet season
MonsoonRisk26 rainy days and about 247 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Where is Mirissa?
Mirissa in October — FAQ
- Is October a good time to visit Mirissa?
- October in Mirissa: sweltering, soaked, with clean air — fine if you can take 26 rainy days. It ranks #10 of 12 months for Mirissa on SeasonMap's comfort score (70/100).
- What is the weather like in Mirissa in October?
- In October, Mirissa averages a daily high of 29.2°C and a low of 24.7°C, with about 247.3 mm of rain over roughly 26.3 rainy days.
- What is the air quality in Mirissa in October?
- Mirissa has a mean US Air Quality Index of about 44 in October.