Mannar weather in August

In August, Mannar sees average daytime highs of 30°C and overnight lows near 27°C, with 33 mm of rain across 6.8 wet days and about 12.3 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 11% of the time in August, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of August to 12 h 12 min by month's end. Set against the rest of the year, August is Mannar's 9th-clearest and 3rd-windiest month. For the whole year in context, see Mannar's year-round climate.

Daytime high
30°
6th warmest
Overnight low
27°
9th coldest
Rainfall
33 mm
6.8 wet days
Daylight
12 h 18 min
6:06 AM – 6:24 PM
Cloud cover
76%
9th clearest
Wind
26 km/h
3rd windiest
Solar energy
5.97 kWh/m²
Travel score
5.0
out of 10

Mannar is town in Sri Lanka.

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 30°C through the month.

A typical August day in Mannar reaches about 30°C in the afternoon and slips back to 27°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°C. Set against its neighbours, August runs on par with July and on par with September.

25°28°30°33°35°151015202531
Avg high (°C)Avg low (°C)
13027
23027
33027
43027
53027
63027
73027
83027
93027
103027
113027
123027
133027
143027
153027
163027
173027
183027
193027
203027
213027
223027
233027
243027
253027
263027
273027
283027
293027
303027
313027

How August really feels in Mannar

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.

Mannar weather by month

How August compares with the rest of the year at a glance. August is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°586.711.56.6
Feb29° / 24°274.611.76.2
Mar31° / 25°295.511.95.2
Apr31° / 27°7813.412.24.1
May31° / 28°699.812.44.4
Jun31° / 28°245.612.54.9
Jul30° / 27°235.812.55.0
Aug30° / 27°336.812.35.0
Sep30° / 27°569.812.14.8
Oct29° / 26°18620.511.83.9
Nov28° / 25°24722.211.64.1
Dec28° / 24°15115.311.55.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 77%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11981
21981
32179
42179
52179
62278
72377
82377
92377
102377
112476
122476
132476
142377
152377
162278
172179
182278
192377
202377
212377
222377
232476
242575
252575
262575
272575
282575
292674
302674
312674

Chance of precipitation in August

Any precipitation

Mannar gets around 33 mm of rain over 6.8 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 23% and peaks near 26% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
118
218
318
418
518
618
719
820
920
1021
1122
1223
1324
1424
1525
1625
1726
1826
1926
2026
2126
2226
2325
2425
2524
2624
2724
2824
2924
3024
3124

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 53% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
13961
24060
34060
44159
54159
64258
74258
84357
94357
104456
114456
124555
134654
144654
154753
164753
174852
184852
194951
205050
215050
225149
235248
245248
255248
265347
275347
285347
295347
305347
315347

Wind in August

Winds average 26 km/h in August.

Across August, daily wind ranges from about 26 km/h on the calmest days to 27 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
127breezy
227breezy
327breezy
427breezy
527breezy
627breezy
727breezy
827breezy
927breezy
1026breezy
1126breezy
1226breezy
1326breezy
1426breezy
1526breezy
1626breezy
1726breezy
1826breezy
1926breezy
2026breezy
2126breezy
2226breezy
2326breezy
2426breezy
2526breezy
2626breezy
2726breezy
2826breezy
2926breezy
3026breezy
3126breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 12 h 24 min at the start of August to 12 h 12 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 6:05 AM to 6:05 AM, and sunset from 6:28 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:056:28
212.46:056:28
312.46:056:28
412.46:056:28
512.46:056:27
612.46:056:27
712.46:056:27
812.46:056:27
912.36:056:26
1012.36:056:26
1112.36:056:26
1212.36:066:25
1312.36:066:25
1412.36:066:24
1512.36:066:24
1612.36:066:24
1712.36:066:23
1812.36:066:23
1912.36:066:22
2012.36:066:22
2112.36:066:21
2212.36:066:21
2312.26:066:20
2412.26:066:20
2512.26:056:19
2612.26:056:19
2712.26:056:18
2812.26:056:18
2912.26:056:17
3012.26:056:17
3112.26:056:16

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.97 kWh/m².

For context, solar energy here swings from a low near 4.06 kWh/m² to a high of 6.38 kWh/m² in March across the year — August's 5.97 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
196.0Bright
206.0Bright
216.0Bright
226.0Bright
236.0Bright
246.0Bright
256.0Intense
266.0Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
316.0Intense
Planning a trip in August

Hazard calendar for Mannar

In seasonPeak

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

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

Mannar's monsoon runs October–December, when most of the year's rain falls.

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

Is August a good time to visit Mannar?

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

5.0
Sightseeing
5th-best month of the year
6.9
Beach & pool
6th-best month of the year

August is a reasonable time to visit Mannar for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mannar in August

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

In August, Mannar sees daytime highs around 30°C and nights near 27°C. Pack light clothes. Worth having: sun protection and a windbreaker. About 7 days see rain.

light clothessun protectiona windbreaker

Sea temperature near Mannar in August

The nearest coast averages about 28°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 13 km away) is warmest in April at about 30°C and coldest in January 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
Jan27Warm
Feb28Warm
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul28Tropical
Aug28Tropical
Sep28Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Mannar 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 Mannar peaks around April 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 9 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 17UV 13Jan 9UV 9
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec9Very high

Air quality in Mannar 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 Mannar is worst in May — around 24 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1323 µg/m³Sep 1516 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb19Moderate
Mar21Moderate
Apr22Moderate
May24Moderate
Jun18Moderate
Jul17Moderate
Aug18Moderate
Sep16Moderate
Oct18Moderate
Nov18Moderate
Dec19Moderate
Location & terrain

Where is Mannar?

Mannar sits at 9.0°N, 79.9°E, 9 m above sea level, in Sri Lanka. The nearest listed city is Vavuniya, 73 km away.

VavuniyaJaffnaAnuradhapuraValvedditturaiPoint PedroPuttalamMullaittivuSigiriya

Topography around Mannar

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

Within 3 km, the terrain around Mannar has only modest variations in elevation — a maximum elevation change of 11 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 13 m; within 80 km, only modest variations in elevation — a maximum elevation change of 174 m.

The land around Mannar is covered by water (39%) and trees (24%) within 3 km, water (73%) within 16 km, and water (56%) and trees (33%) within 80 km.

3 km
11 m
16 km
13 m
80 km
174 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
August weather nearby: Vavuniya 73 km · Jaffna 77 km · Anuradhapura 96 km · Valvedditturai 97 km · Point Pedro 100 km · Puttalam 106 km · Mullaittivu 107 km · Sigiriya 150 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 Mannar (8.9894°, 79.8784°, elevation 9 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).