Kos weather in August

In August, Kos sees average daytime highs of 26°C and overnight lows near 24°C, with 0 mm of rain across 0 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 100% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Kos's 2nd-clearest and 6th-windiest month. For the whole year in context, see Kos's year-round climate.

Daytime high
26°
1st warmest
Overnight low
24°
12th coldest
Rainfall
0 mm
0 wet days
Daylight
13 h 24 min
5:32 AM – 6:58 PM
Cloud cover
2%
2nd clearest
Wind
24 km/h
6th windiest
Solar energy
7.1 kWh/m²
Travel score
9.4
out of 10

Kos is city on the homonymous island in Aegean Sea, Greece.

Density
286/km²
people per km²

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 26°C through the month.

A typical August day in Kos reaches about 26°C in the afternoon and slips back to 24°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 28°C. Set against its neighbours, August runs on par with July and about 2°C warmer than September.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12624
22624
32625
42625
52625
62625
72625
82625
92625
102625
112625
122625
132625
142625
152625
162625
172625
182625
192625
202625
212625
222625
232624
242624
252624
262624
272624
282624
292624
302624
312624

Kos weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 12°17312.39.84.1
Feb14° / 12°12611.510.64.0
Mar15° / 13°788.311.75.0
Apr17° / 15°395.812.96.3
May20° / 18°163.113.98.0
Jun24° / 22°20.414.59.5
Jul26° / 24°00.114.39.6
Aug26° / 24°0013.49.4
Sep24° / 23°161.812.39.3
Oct22° / 20°624.9118.0
Nov19° / 17°1208.9106.5
Dec16° / 14°19012.89.54.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 100% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 0% of August, with mostly cloudy or overcast conditions the remaining 0%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Chance of precipitation in August

Any precipitation

Kos gets around 0 mm of rain over 0 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 0% and peaks near 1% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
271
281
291
301
311

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 94% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100543493
200542503
300542503
400542503
500441523
600441523
700442513
800442513
900442513
1000343513
1100343522
1200344512
1300344512
1400345502
1500345511
1600345511
1700346501
1800346501
1900446491
2000446490
2100446490
2200546490
2300546480
2401646470
2501746460
2601846450
2701945440
28021045430
29021145410
30131245400
31131345380

Wind in August

Winds average 24 km/h in August.

Across August, daily wind ranges from about 24 km/h on the calmest days to 25 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
124breezy
224breezy
324breezy
424breezy
524breezy
624breezy
725breezy
825breezy
925breezy
1025breezy
1125breezy
1225breezy
1325breezy
1425breezy
1525breezy
1625breezy
1724breezy
1824breezy
1924breezy
2024breezy
2124breezy
2224breezy
2324breezy
2424breezy
2524breezy
2624breezy
2724breezy
2824breezy
2924breezy
3024breezy
3124breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 54 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 5:20 AM to 5:45 AM, and sunset from 7:14 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:207:14
213.95:207:13
313.85:217:12
413.85:227:11
513.85:237:10
613.85:247:09
713.75:257:08
813.75:257:07
913.75:267:06
1013.65:277:05
1113.65:287:04
1213.65:297:03
1313.55:307:01
1413.55:317:00
1513.55:316:59
1613.45:326:58
1713.45:336:56
1813.45:346:55
1913.35:356:54
2013.35:366:52
2113.25:366:51
2213.25:376:50
2313.25:386:48
2413.15:396:47
2513.15:406:46
2613.15:416:44
2713.05:426:43
2813.05:426:41
2912.95:436:40
3012.95:446:38
3112.95:456:37

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 7.1 kWh/m².

For context, solar energy here swings from a low near 2.2 kWh/m² to a high of 7.91 kWh/m² in June across the year — August's 7.1 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.5Intense
27.5Intense
37.5Intense
47.5Intense
57.4Intense
67.4Intense
77.4Intense
87.4Intense
97.3Intense
107.3Intense
117.3Intense
127.2Intense
137.2Intense
147.2Intense
157.2Intense
167.1Intense
177.1Intense
187.0Intense
197.0Intense
207.0Intense
217.0Intense
226.9Intense
236.9Intense
246.8Intense
256.8Intense
266.8Intense
276.7Intense
286.7Intense
296.6Intense
306.6Intense
316.5Intense
Planning a trip in August

Hazard calendar for Kos

In seasonPeak

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

Kos's rainy season runs November–February, when most of the year's rain falls.

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

Is August a good time to visit Kos?

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

9.4
Sightseeing
3rd-best month of the year
8.9
Beach & pool
1st-best month of the year

August is one of the better times to visit Kos for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Kos in August

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

In August, Kos sees daytime highs around 26°C and nights near 24°C. Pack sun protection. Worth having: light clothes and a windbreaker.

sun protectionlight clothesa windbreaker

Sea temperature near Kos in August

The nearest coast averages about 25°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 August at about 25°C and coldest in March near 17°C.

It's comfortable for a long swim from May 23 to Nov 28 — about 6.2 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb17Cool
Mar17Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul24Refreshing
Aug25Warm
Sep24Warm
Oct23Refreshing
Nov21Refreshing
Dec19Cool

UV index in Kos in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kos peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highModerateJun 22UV 9Jan 10UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr8Very high
May8Very high
Jun10Very high
Jul9Very high
Aug9Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Moderate
Location & terrain

Where is Kos?

Kos sits at 36.9°N, 27.3°E, 10 m above sea level, in Greece. The nearest listed city is Turgutreis, 14 km away.

DidimMilasMarmarisYatağanSökeRhodes

Topography around Kos

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

Within 3 km, the terrain around Kos has only modest variations in elevation — a maximum elevation change of 196 m around an average of 22 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 830 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,389 m.

The land around Kos is covered by water (37%) and grassland (23%) within 3 km, water (74%) within 16 km, and water (74%) within 80 km.

3 km
196 m
16 km
830 m
80 km
1,389 m
treesshrubsgrasslandcroplandartificial surfaceswater
August weather nearby: Turgutreis 14 km · Bodrum 20 km · Didim 55 km · Milas 64 km · Marmaris 88 km · Yatağan 91 km · Söke 96 km · Rhodes 98 km

Greece travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 60% of US
price level, 2025
GDP per capita
$26,948
2025
Happiness
5.7 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
8.3
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 592
Religion
other 3%Muslim 2%

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 Kos (36.8929°, 27.2877°, elevation 10 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).