Katunayaka weather in August

In August, Katunayaka sees average daytime highs of 29°C and overnight lows near 25°C, with 209 mm of rain across 28.6 wet days and about 12.2 hours of daylight. It is the 11th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 3% of the time in August, and the air most often feels miserable.

Daylight stretches from about 12 h 18 min at the start of August to 12 h 06 min by month's end. Set against the rest of the year, August is Katunayaka's 10th-clearest and 2nd-windiest month. For the whole year in context, see Katunayaka's year-round climate.

Daytime high
29°
11th warmest
Overnight low
25°
8th coldest
Rainfall
209 mm
28.6 wet days
Daylight
12 h 12 min
6:07 AM – 6:22 PM
Cloud cover
82%
10th clearest
Wind
13 km/h
2nd windiest
Solar energy
4.97 kWh/m²
Travel score
3.0
out of 10

Katunayaka is suburb in Western Province.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical August day in Katunayaka reaches about 29°C in the afternoon and slips back to 25°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, August runs on par with July and on par with September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12925
22925
32925
42925
52925
62925
72925
82925
92925
102925
112925
122925
132925
142925
152925
162925
172925
182925
192925
202925
212925
222925
232925
242925
252925
262925
272925
282925
292925
302925
312925

How August really feels in Katunayaka

Once humidity and wind are folded in, August averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Katunayaka weather by month

How August compares with the rest of the year at a glance. August is the 11th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°486.711.64.9
Feb32° / 24°486.611.84.1
Mar33° / 25°9115123.2
Apr32° / 25°18326.412.22.6
May30° / 26°23428.912.32.6
Jun29° / 26°25328.612.42.8
Jul29° / 25°23028.412.43.0
Aug29° / 25°20928.612.23.0
Sep29° / 25°23227.4123.0
Oct29° / 24°3412811.83.0
Nov30° / 24°29922.711.73.4
Dec30° / 23°14814.311.64.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 9% of August, with mostly cloudy or overcast conditions the remaining 88%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11288
21288
31288
41288
51288
61288
71288
81288
91288
101288
111189
121189
131189
141189
151189
161189
171189
181189
191288
201288
211288
221288
231288
241288
251288
261288
271288
281288
291288
301288
311288

Chance of precipitation in August

Any precipitation

Katunayaka gets around 209 mm of rain over 28.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 92% and peaks near 93% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
192
292
392
493
593
693
793
893
993
1093
1193
1293
1392
1492
1592
1692
1791
1891
1991
2091
2191
2291
2391
2491
2591
2691
2790
2890
2990
3090
3190

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the miserable band about 79% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
11981
21981
31981
41981
51981
61981
71981
81981
91981
101981
111981
121981
131981
142080
152080
162080
172080
182080
192080
202179
212179
222179
232278
242377
252377
262476
272476
282575
292575
302674
312773

Wind in August

Winds average 13 km/h in August.

Across August, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 12 h 18 min at the start of August to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over August. Sunrise moves from 6:07 AM to 6:06 AM, and sunset from 6:26 PM to 6:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:076:26
212.36:076:26
312.36:076:26
412.36:076:25
512.36:076:25
612.36:076:25
712.36:076:25
812.36:076:24
912.36:076:24
1012.36:076:24
1112.36:076:23
1212.36:076:23
1312.36:076:23
1412.26:076:22
1512.26:076:22
1612.26:076:22
1712.26:076:21
1812.26:076:21
1912.26:076:20
2012.26:076:20
2112.26:076:20
2212.26:076:19
2312.26:076:19
2412.26:076:18
2512.26:076:18
2612.26:076:17
2712.26:076:17
2812.26:076:16
2912.26:066:16
3012.26:066:15
3112.16:066:15

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.97 kWh/m².

For context, solar energy here swings from a low near 4.49 kWh/m² to a high of 6.27 kWh/m² in March across the year — August's 4.97 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in August

Hazard calendar for Katunayaka

In seasonPeak

None of Katunayaka's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Katunayaka sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

Cyclone
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Katunayaka?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.0
Sightseeing
6th-best month of the year
4.0
Beach & pool
8th-best month of the year

August is a weaker month for outdoor sightseeing in Katunayaka.

What to pack for Katunayaka in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Katunayaka sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.

light clothesrain gearsun protection

Sea temperature near Katunayaka in August

The nearest coast averages about 27°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in April at about 30°C and coldest in August near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr30Tropical
May29Tropical
Jun28Tropical
Jul28Warm
Aug27Warm
Sep28Warm
Oct28Tropical
Nov29Tropical
Dec28Tropical

UV index in Katunayaka in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Katunayaka peaks around February 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 10 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highFeb 17UV 13Dec 15UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar12Extreme
Apr12Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov10Extreme
Dec10Very high

Air quality in Katunayaka in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Katunayaka is worst in November — around 60 µg/m³ PM2.5 (unhealthy), about 2.4× the cleanest month (July, 25 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModeratePoorUnhealthyPoorNov 1759 µg/m³Jul 2025 µg/m³
PM2.5 (µg/m³)Level
Jan45Poor
Feb41Poor
Mar57Unhealthy
Apr59Unhealthy
May42Poor
Jun27Moderate
Jul25Moderate
Aug26Moderate
Sep30Moderate
Oct49Poor
Nov60Unhealthy
Dec52Poor
Location & terrain

Where is Katunayaka?

Katunayaka sits at 7.2°N, 79.9°E, 13 m above sea level, in Sri Lanka. The nearest listed city is Negombo, 7.0 km away.

Kelaniya

Topography around Katunayaka

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Katunayaka.

Within 3 km, the terrain around Katunayaka has only modest variations in elevation — a maximum elevation change of 36 m around an average of 9 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 70 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,145 m.

The land around Katunayaka is covered by trees (57%) and artificial surfaces (22%) within 3 km, trees (53%) and water (33%) within 16 km, and trees (60%) and water (34%) within 80 km.

3 km
36 m
16 km
70 m
80 km
2,145 m
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Negombo 7.0 km · Ja Ela 11 km · Kandana 14 km · Welisara 16 km · Hendala 20 km · Wattala 20 km · Peliyagoda 22 km · Kelaniya 24 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
Buddhist 70%Hindu 13%Muslim 10%Roman Catholic 6%

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 Katunayaka (7.1699°, 79.8884°, elevation 13 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).