Heraklion weather in August

In August, Heraklion sees average daytime highs of 29°C and overnight lows near 22°C, with 6 mm of rain across 0.7 wet days and about 13.3 hours of daylight. It is the 2nd-warmest and 11th-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 96% of the time in August, and the air most often feels humid.

Daylight stretches from about 13 h 48 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Heraklion's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Heraklion's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
22°
12th coldest
Rainfall
6 mm
0.7 wet days
Daylight
13 h 18 min
5:43 AM – 7:04 PM
Cloud cover
7%
2nd clearest
Wind
10 km/h
2nd windiest
Solar energy
7.02 kWh/m²
Travel score
7.2
out of 10

Heraklion is city in the island of Crete, Greece.

Density
1,258/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 29°C through the month.

A typical August day in Heraklion reaches about 29°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, August runs on par with July and about 2°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
63022
73022
83022
93022
103022
113022
123022
133022
143022
153022
163022
173022
183022
192922
202921
212921
222921
232921
242921
252921
262921
272921
282921
292921
302921
312921

Heraklion weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 68129.93.9
Feb14° / 6410.510.74.2
Mar17° / 548.311.75.6
Apr20° / 11°365.612.97.3
May25° / 15°314.313.88.3
Jun28° / 19°131.914.37.9
Jul30° / 21°50.714.17.2
Aug29° / 22°60.713.37.2
Sep27° / 19°192.912.28.1
Oct24° / 16°385.911.17.8
Nov19° / 12°457.110.16.6
Dec15° / 6411.39.74.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 96% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 4% 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
26991
27991
28991
29991
30991
31991

Chance of precipitation in August

Any precipitation

Heraklion gets around 6 mm of rain over 0.7 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 3% and peaks near 4% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
12
22
32
43
53
63
73
83
93
103
113
123
133
143
153
163
172
182
192
202
212
222
232
242
252
263
273
283
293
304
314

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
132151232
232051242
322051252
421951262
521852262
621851272
721851272
821851272
921851272
1021853261
1121952261
1221953251
1321953251
1422053241
1512054241
1612055231
1722055230
1822055230
1922056220
2022056220
2122155220
2222155220
2322156210
2422255210
2522354210
2622454200
2732453200
2832553190
2932653180
3042751180
3142851170

Wind in August

Winds average 10 km/h in August.

Across August, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 48 min at the start of August to 12 h 48 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 5:31 AM to 5:55 AM, and sunset from 7:19 PM to 6:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:317:19
213.85:327:19
313.75:337:18
413.75:347:17
513.75:357:16
613.75:357:15
713.65:367:14
813.65:377:13
913.65:387:12
1013.55:397:11
1113.55:397:10
1213.55:407:08
1313.45:417:07
1413.45:427:06
1513.45:427:05
1613.35:437:04
1713.35:447:03
1813.35:457:01
1913.25:467:00
2013.25:466:59
2113.25:476:58
2213.15:486:56
2313.15:496:55
2413.15:506:54
2513.05:506:52
2613.05:516:51
2713.05:526:50
2812.95:536:48
2912.95:536:47
3012.95:546:45
3112.85:556:44

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 7.02 kWh/m².

For context, solar energy here swings from a low near 2.28 kWh/m² to a high of 7.87 kWh/m² in June across the year — August's 7.02 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.5Intense
27.4Intense
37.4Intense
47.4Intense
57.4Intense
67.3Intense
77.3Intense
87.3Intense
97.3Intense
107.2Intense
117.2Intense
127.2Intense
137.1Intense
147.1Intense
157.1Intense
167.0Intense
177.0Intense
187.0Intense
196.9Intense
206.9Intense
216.9Intense
226.8Intense
236.8Intense
246.8Intense
256.7Intense
266.7Intense
276.6Intense
286.6Intense
296.5Intense
306.5Intense
316.5Intense
Planning a trip in August

Hazard calendar for Heraklion

In seasonPeak

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

Heraklion sees seasonal dust haze (May), heaviest in May.

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

Is August a good time to visit Heraklion?

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

7.2
Sightseeing
6th-best month of the year
9.4
Beach & pool
2nd-best month of the year

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

What to pack for Heraklion in August

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

In August, Heraklion sees daytime highs around 29°C and nights near 22°C. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Heraklion 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 February near 16°C.

It's comfortable for a long swim from May 25 to Nov 19 — about 5.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr17Cool
May19Cool
Jun23Refreshing
Jul25Warm
Aug25Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec18Cool

UV index in Heraklion in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Heraklion peaks around July 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highHighModerateJul 13UV 10Jan 10UV 3
UV index (midday)Level
Jan3Moderate
Feb3Moderate
Mar6High
Apr8Very high
May7Very high
Jun10Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate
Location & terrain

Where is Heraklion?

Heraklion sits at 35.3°N, 25.1°E, 60 m above sea level, in Greece. The nearest listed city is Rethymno, 60 km away.

RethymnoChaniaFiraOiaParosNaxosMykonosKos

Topography around Heraklion

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

Within 3 km, the terrain around Heraklion has only modest variations in elevation — a maximum elevation change of 188 m around an average of 49 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 822 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,433 m.

The land around Heraklion is covered by artificial surfaces (53%) within 3 km, water (39%), trees (27%) and grassland (24%) within 16 km, and water (69%) within 80 km.

3 km
188 m
16 km
822 m
80 km
2,433 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Rethymno 60 km · Chania 103 km · Fira 124 km · Oia 128 km · Paros 195 km · Naxos 199 km · Mykonos 236 km · Kos 260 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 Heraklion (35.3279°, 25.1434°, elevation 60 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).