Unawatuna in Summer
In summer (June, July and August), Unawatuna sees average daytime highs around 28°C and overnight lows near 26°C, with 655 mm of rain over about 82 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Across summer, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 7% of the time across summer, and the air most often feels miserable.
Summer is Unawatuna's weakest season of the year to visit on our travel score. Unawatuna has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Unawatuna's year-round climate.
- Avg daytime high
- 28°C
- 3rd-warmest season
- Avg overnight low
- 26°C
- Rainfall
- 655 mm
- 82 wet days
- Avg wind
- 22 km/h
- Travel score
- 3.7
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Unawatuna in Summer
Across summer, daytime highs hold fairly steady around 28°C.
A typical summer day in Unawatuna reaches about 28°C and drops to 26°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in Unawatuna
Once humidity and wind are folded in, summer brings about 38 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Unawatuna weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 28° / 25° | 63 | 12.1 | 11.7 | 6.0 |
| Feb | 28° / 25° | 54 | 10.7 | 11.8 | 5.6 |
| Mar | 29° / 26° | 67 | 14.2 | 12 | 5.1 |
| Apr | 29° / 26° | 153 | 23.1 | 12.1 | 3.8 |
| May | 29° / 26° | 275 | 28.3 | 12.3 | 3.3 |
| Jun | 28° / 26° | 244 | 27.4 | 12.3 | 3.5 |
| Jul | 28° / 26° | 206 | 27.3 | 12.3 | 3.8 |
| Aug | 27° / 26° | 205 | 27.3 | 12.2 | 3.8 |
| Sep | 28° / 26° | 246 | 26.5 | 12 | 3.8 |
| Oct | 28° / 26° | 261 | 26.4 | 11.9 | 3.9 |
| Nov | 28° / 25° | 253 | 23.1 | 11.7 | 4.2 |
| Dec | 28° / 25° | 147 | 18.6 | 11.7 | 5.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 7% of the time across summer.
Chance of precipitation in Summer
Unawatuna gets around 655 mm of rain over 82 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 22 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 18 min in early June to 12 h 06 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.4 kWh/m².
Hazard calendar for Unawatuna
In summer, Unawatuna overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Unawatuna sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Is summer a good time to visit Unawatuna?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Unawatuna.
What to pack for Unawatuna in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Unawatuna sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection and a windbreaker. About 82 days see rain.
Sea temperature near Unawatuna in Summer
The nearest coast averages about 28°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 18 km away) is warmest in April at about 30°C and coldest in July near 28°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 29 | 30 | 29 | 28 | 28 | 28 | 28 | 28 | 29 | 28 |
| Comfort | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 29 | Tropical |
| Jun | 28 | Tropical |
| Jul | 28 | Warm |
| Aug | 28 | Warm |
| Sep | 28 | Warm |
| Oct | 28 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Tropical |
UV index in Unawatuna in Summer
Clear-sky midday UV across summer averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Unawatuna peaks around April 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 9 | 14 | 12 | 14 | 13 | 11 | 11 | 13 | 13 | 13 | 11 | 10 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 14 | Extreme |
| Mar | 12 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 13 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Very high |
Air quality in Unawatuna in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Unawatuna is worst in January — around 35 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (September, 16 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 35 | 31 | 25 | 21 | 20 | 18 | 17 | 17 | 16 | 18 | 25 | 30 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 35 | Moderate |
| Feb | 31 | Moderate |
| Mar | 25 | Moderate |
| Apr | 21 | Moderate |
| May | 20 | Moderate |
| Jun | 18 | Moderate |
| Jul | 17 | Moderate |
| Aug | 17 | Moderate |
| Sep | 16 | Moderate |
| Oct | 18 | Moderate |
| Nov | 25 | Moderate |
| Dec | 30 | Moderate |
Where is Unawatuna?
Unawatuna sits at 6.0°N, 80.3°E, 0 m above sea level, in Sri Lanka. The nearest listed city is Galle, 5.0 km away.
Topography around Unawatuna
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Unawatuna.
Within 3 km, the terrain around Unawatuna has only modest variations in elevation — a maximum elevation change of 75 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 226 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,357 m.
The land around Unawatuna is covered by trees (53%) and water (34%) within 3 km, water (51%) and trees (45%) within 16 km, and trees (51%) and water (46%) within 80 km.
Sri Lanka travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type D / G / M
- 230 V · 50 Hz
- Prices
- ≈ 27% of US
- price level, 2025
- GDP per capita
- $5,002
- 2025
- Happiness
- 4.0 / 10
- World Happiness, 2025
- Safe drinking water
- 47%
- of population, 2024
- Homicide rate
- 3.3
- per 100k, 2019
- Road deaths
- 19.7
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 486
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Unawatuna (6.0212°, 80.2503°, elevation 0 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.