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Greece · Greek Islands

Kea weather & best time to visit

Sun, sea & sand

Kea at a glance

Best time
Jul – Sep
Warmest month
Aug · 26°
Warmest sea
Aug · 25.0°
Sunshine a year
2,520 h
Rain a year
440 mm
Climate
Mediterranean
Time zone
UTC+2 / UTC+3
Elevation
443 m

Climate in Kea

Kea has a Mediterranean climate with warm to hot, dry summers and mild, wetter winters. August is the warmest month with average highs of 26 °C, while January is the coolest at 12 °C. With around 2,520 hours of sunshine a year, Kea is sunny; July is the sunniest month with 11.3 hours a day.

Holiday weather through the year

Best time to visit

Best time to visit Kea

The best time to visit Kea is from July to September. For a beach holiday – sea from 21 °C, warm and mostly dry – go from June to September. For sightseeing, day trips and hiking, conditions are most comfortable from April to November. The wettest month is December with 66 mm of precipitation.

Kea through the seasons

How the weather changes over the seasons, with averages for each.

Kea in spring

Mar – May

34

Poor

  • 14–20 °C by day
  • Sea 17 °C
  • 7.4 h of sun a day
  • 19 rainy days in all

Kea in summer

Jun – Aug

94

Excellent

  • 24–26 °C by day
  • Sea 24 °C
  • 10.8 h of sun a day
  • 7 rainy days in all

Kea in autumn

Sep – Nov

58

Fair

  • 17–24 °C by day
  • Sea 22 °C
  • 6.1 h of sun a day
  • 15 rainy days in all

Kea in winter

Dec – Feb

15

Poor

  • 12–13 °C by day
  • Sea 16 °C
  • 3.3 h of sun a day
  • 25 rainy days in all

Which month for what?

Beach & swimming

Jun – Sep

Sea from 21 °C, warm and mostly dry

Sightseeing & hiking

Apr – Nov

15–28 °C and not too much rain

Find your perfect month

Tell us what you like and we rate every month in Kea for you.

Swimming in the sea
Sunshine
Little rain

Your best months: July – August

Based on the climate averages; tap a month to see its details.

Your holiday weather, at a glance

Weather in October

Weather in October

55

Holiday weather in October

Fair

Best time to visit: July – September

Good forSightseeing & walks

A typical day in October

  1. Morning, 08:00: about 16°
  2. Midday, 13:00: about 20°
  3. Afternoon, 16:00: about 20°
  4. Evening, 20:00: about 18°
  5. Night, 23:00: about 17°

07:2918:47

Pleasant evenings; a light layer can help.

Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.

Light for photos in October

Golden hour
Morning 07:13–08:05 · evening 18:12–19:03
Blue hour
Morning 07:03–07:13 · evening 19:03–19:13

Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.

October in Kea compared with home

Home:

Loading the climate at home …

Early or late October?

In October, daytime highs fall from about 22° at the start of the month to 18° at the end. The sea cools from 23° to 21°. The days get 1.1 h shorter.

Early or late October?
October1 Oct31 Oct
Daytime high22°18°
Night-time low17°13°
Sea23°21°
Daylight11.8 h10.7 h

What is the weather like in Kea in October?

In October, Kea is mild: daytime highs average 20 °C, and nights cool down to about 15 °C. The sea averages 22.1 °C – refreshing for a swim. Expect around 6.1 hours of sunshine a day. Rain is rare: about 4 days bring 30 mm in total. All in all, October is a so-so month for a holiday in Kea.

More details for October

Daylight
11 h 17 min07:29 – 18:47
UV index
5 · moderateclear sky, noon (estimate)All months
Muggy days
5 daysdew point 18 °C or moreAll months
Wind
16 km/haverage daily peakAll months
Cloud cover
39 %on averageAll months
Hot days
0 days30 °C or moreAll months
Snow days
0 days1 cm or more of fresh snow
Time zone
UTC+3offset from UTC

How the score comes together

  • Temperatureweight 35 %18 %
  • Seaweight 25 %73 %
  • Sunshineweight 20 %52 %
  • Few rainy daysweight 20 %99 %

Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.

What to pack in October

  • Swimwear
  • Sunscreen
  • A jumper for the evenings

Compare two months in Kea

Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.

vs

July has the better holiday weather in Kea: score 100 against 55. In July, days are 6 °C warmer than in October. The sea is 2 °C warmer in July. July has 2 fewer rainy days. The sun shines 5 hours longer a day in July.

October vs July, Kea
MonthOctoberJuly
Holiday weather score55100better
Daytime high20°26°
Night-time low15°21°
Sea22.1°24.2°
Sunshine6.1 h11.3 hbetter
Rainy days42better
Rainfall30 mm11 mmbetter
Muggy days5better22

Based on the climate averages 1996–2025.

Kea month by month

The typical weather for every month at a glance.

14January12° · Sea 15° · 3.1 h

In January, Kea is cool: daytime highs average 12 °C, and nights cool down to about 7 °C. The sea averages 15.4 °C – swimming is only for the hardy. The sun is scarce, with only about 3.1 hours a day. Rain falls on about 8 days, adding up to 57 mm. All in all, January is not an ideal month for a holiday in Kea.

Kea in January
18February12° · Sea 15° · 4.1 h

In February, Kea is cool: daytime highs average 12 °C, and nights cool down to about 7 °C. The sea averages 15.1 °C – swimming is only for the hardy. Expect around 4.1 hours of sunshine a day. Rain falls on about 8 days, adding up to 53 mm. All in all, February is not an ideal month for a holiday in Kea.

Kea in February
23March14° · Sea 15° · 5.7 h

In March, Kea is cool: daytime highs average 14 °C, and nights cool down to about 9 °C. The sea averages 15.4 °C – swimming is only for the hardy. Expect around 5.7 hours of sunshine a day. Rain falls on about 8 days, adding up to 58 mm. All in all, March is not an ideal month for a holiday in Kea.

Kea in March
33April16° · Sea 16° · 7.6 h

In April, Kea is mild: daytime highs average 16 °C, and nights cool down to about 11 °C. The sea averages 16.1 °C – swimming is only for the hardy. The sun shines for around 7.6 hours a day. Rain falls on about 6 days, adding up to 36 mm. All in all, April is not an ideal month for a holiday in Kea.

Kea in April
46May20° · Sea 18° · 8.8 h

In May, Kea is mild: daytime highs average 20 °C, and nights cool down to about 14 °C. The sea averages 18.4 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 8.8 hours a day. Rain falls on about 5 days, adding up to 27 mm. All in all, May is a so-so month for a holiday in Kea.

Kea in May
83June24° · Sea 22° · 10.6 h

In June, Kea is warm: daytime highs average 24 °C, and nights cool down to about 18 °C. The sea averages 21.8 °C – refreshing for a swim. With around 10.6 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 19 mm in total. All in all, June is an excellent month for a holiday in Kea.

Kea in June
100July26° · Sea 24° · 11.3 h

In July, Kea is warm: daytime highs average 26 °C, and even at night it stays warm at around 21 °C. The sea averages 24.2 °C – pleasant for swimming. With around 11.3 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The air is often humid and muggy. All in all, July is an excellent month for a holiday in Kea.

Kea in July
100August26° · Sea 25° · 10.4 h

In August, Kea is warm: daytime highs average 26 °C, and even at night it stays warm at around 21 °C. The sea averages 25.0 °C – pleasant for swimming. With around 10.4 hours of sunshine a day, there is plenty of sun. Rain is rare: about 2 days bring 11 mm in total. The air is often humid and muggy. All in all, August is an excellent month for a holiday in Kea.

Kea in August
90September24° · Sea 24° · 8.2 h

In September, Kea is warm: daytime highs average 24 °C, and nights cool down to about 18 °C. The sea averages 24.2 °C – pleasant for swimming. The sun shines for around 8.2 hours a day. Rain is rare: about 4 days bring 25 mm in total. All in all, September is an excellent month for a holiday in Kea.

Kea in September
55October20° · Sea 22° · 6.1 h

In October, Kea is mild: daytime highs average 20 °C, and nights cool down to about 15 °C. The sea averages 22.1 °C – refreshing for a swim. Expect around 6.1 hours of sunshine a day. Rain is rare: about 4 days bring 30 mm in total. All in all, October is a so-so month for a holiday in Kea.

Kea in October
28November17° · Sea 19° · 4.0 h

In November, Kea is mild: daytime highs average 17 °C, and nights cool down to about 12 °C. The sea averages 19.3 °C – bracing, so a wetsuit helps for longer swims. Expect around 4.0 hours of sunshine a day. Rain falls on about 7 days, adding up to 49 mm. All in all, November is not an ideal month for a holiday in Kea.

Kea in November
13December13° · Sea 17° · 2.7 h

In December, Kea is cool: daytime highs average 13 °C, and nights cool down to about 9 °C. The sea averages 17.0 °C – bracing, so a wetsuit helps for longer swims. The sun is scarce, with only about 2.7 hours a day. Rain falls on about 9 days, adding up to 66 mm. All in all, December is not an ideal month for a holiday in Kea.

Kea in December

Climate in detail

Climate through the year

Long-term monthly averages. Tap a month to see its details.

Best time to visit

Nights and sleep in Kea

How warm the nights get in each month, from the mean night-time low. Tap a month for details.

  • Cold 0–8°
  • Cool 8–15°
  • Pleasant 15–20°
  • Warm 20–24°
  • muggy month (15+ muggy days)

PleasantOctober: nights around 15°. Ideal for sleeping, often with the window open. Muggy on about 5 days (dew point 18 °C or more).

The coolest nights are in January (7°), the warmest in August (21°). Tropical nights of 20 °C and more are the rule from July to August; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in June and from September to October. Nights fall below 8 °C on average from January to February, so the room should be heated. It is muggy (dew point 18 °C or more) on about 78 days a year, mostly from July to August.

Temperatures through the year

Average daytime high, night-time low and sea temperature per month.

OctoberDay 20°Night 15°Sea 22°
DayNightSea
MonthScoreDayNightSeaSunRain daysRain mm
JanuaryJan1412°7°15.4°3.1 h857
FebruaryFeb1812°7°15.1°4.1 h853
MarchMar2314°9°15.4°5.7 h858
AprilApr3316°11°16.1°7.6 h636
MayMay4620°14°18.4°8.8 h527
JuneJun8324°18°21.8°10.6 h319
JulyJul10026°21°24.2°11.3 h211
AugustAug10026°21°25.0°10.4 h211
SeptemberSep9024°18°24.2°8.2 h425
OctoberOct5520°15°22.1°6.1 h430
NovemberNov2817°12°19.3°4.0 h749
DecemberDec1313°9°17.0°2.7 h966

Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences

37.63° N, 24.35° E · 443 m · Europe/Athens

Swimming calendar

Sea temperature in Kea

Monthly sea surface temperature with the range of cooler and warmer years.

Sea in October22.1°Crefreshing

8 in 10 years: 20.7 – 23.2 °C

Swimming season: Jun – Oct

  • cold
  • fresh
  • refreshing
  • pleasant
  • warm
  • very warm
OctoberMean sea temperature 22.1°8 in 10 years 20.7° – 23.2°
20°
Mean sea temperature8 in 10 years20 °C – comfortable for swimming

The sea temperature in Kea ranges from 15.1 °C in February to 25.0 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.

From September to March the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 24.2 and 25.9 °C.

Sea temperature by month
MonthAverageCool yearWarm yearFeels
JanuaryJan15.4°14.6°16.3°cold
FebruaryFeb15.1°14.4°15.8°cold
MarchMar15.4°14.6°16.0°cold
AprilApr16.1°15.3°16.8°cold
MayMay18.4°17.6°19.1°fresh
JuneJun21.8°20.9°22.8°refreshing
JulyJul24.2°23.4°24.9°pleasant
AugustAug25.0°24.2°25.9°pleasant
SeptemberSep24.2°23.1°24.9°pleasant
OctoberOct22.1°20.7°23.2°refreshing
NovemberNov19.3°18.2°20.9°fresh
DecemberDec17.0°16.1°18.1°fresh
Sunshine

Sunshine hours in Kea

Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.

Per year
2,520 hours
Sunniest month
Jul · 11.3 h a day
Least sunshine
Dec · 2.7 h a day
OctoberSunshine 6.1 hDaylight 11.3 hShare of daylight 54 %
SunshineDaylight

In October, the sun shines for about 6.1 of 11.3 hours of daylight in Kea, 54 % of the daylight hours.

Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.

Rain

Rain in Kea: rainy days and rainfall

A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.

Per year
440 mm on 65 days
Wettest month
Dec · 66 mm
Driest month
Jul · 11 mm
OctoberRainy days 4Rainfall 30 mm

In October, Kea has about 4 rainy days with 30 mm of rain in total.

Sun protection

UV index in Kea

How strong the sun is at noon, month by month, and how quickly unprotected skin burns.

Clear-sky UV in October
5 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.

The sun is strongest in June (UV 11).

Minutes until sunburn in October

Very fair skin
about 30 min
Fair skin
about 35 min
Light brown skin
about 50 min
Olive skin
about 65 min

Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.

Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.

Wind & clouds

Wind and clouds in Kea

How breezy and how cloudy Kea is through the year. Tap a month to select it on the whole page.

Wind

Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.

Year average
17 km/h · gentle breeze
Windiest month
Aug · 19 km/h
Calmest month
May · 16 km/h
OctoberWind 16 km/hBeaufort 3
20
WindBeaufort 4

In October, the wind in Kea typically peaks at 16 km/h during the day: Beaufort 3, gentle breeze.

Breezy months for windsurfing and kiting

The daily breeze rarely reaches Beaufort 4 (20 km/h), so wind sports depend on single windy days.

Clouds

Average share of the sky covered by cloud, day and night.

Year average
37 % · mostly sunny
Clearest month
Jul · 7 %
Cloudiest month
Dec · 58 %
OctoberCloud cover 39 %Sunshine 6.1 h

In October, cloud covers on average 39 % of the sky over Kea: mostly sunny, with about 6.1 hours of sunshine a day.

Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.

Heat & humidity

Heat and humidity in Kea

How often the day gets hot in Kea (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.

Hot days a year
0 days
Hottest month
Aug · 26 °C
Hot months
none

Heat calendar

  • pleasant
  • some hot or muggy days
  • often muggy
  • often hot
  • hot and muggy
OctoberHot days (30 °C+) 0Daytime high 20 °C

In October, Kea has about 0 hot days, with an average daytime high of 20 °C: some hot or muggy days. Single hot or muggy days are possible; a hat and water bottle are enough.

Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year

Planning a trip to Kea

Weather for your travel dates

Pick your arrival and length of stay, and we sum up the weather to expect.

Kea in the school holidays

How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.

Kea has its best school-holiday weather during the summer holidays (score 100) and its weakest during the Christmas holidays (score 14).

  • Easter holidays

    Mar – Apr

    30

    Poor

    • 15 °C by day
    • Sea 16 °C
    • 7.0 h of sun a day
    • 7 rainy days a month
  • May half-term

    May – Jun

    53

    Fair

    • 20 °C by day
    • Sea 19 °C
    • 9.2 h of sun a day
    • 5 rainy days a month

    Good for: Sightseeing & walks

  • Summer holidays

    Jul – Aug

    100

    ExcellentBest holidays

    • 26 °C by day
    • Sea 25 °C
    • 10.7 h of sun a day
    • 2 rainy days a month

    Good for: Beach & swimming, Sightseeing & walks

  • October half-term

    Oct

    55

    Fair

    • 20 °C by day
    • Sea 22 °C
    • 6.1 h of sun a day
    • 4 rainy days a month

    Good for: Sightseeing & walks

  • Christmas holidays

    Dec – Jan

    14

    Poor

    • 13 °C by day
    • Sea 16 °C
    • 2.9 h of sun a day
    • 9 rainy days a month

Based on the climate averages 1996–2025.

Getting there

Flying from

Nonstop flight
about 3 h 30 min
Distance
2,480 km
Time zone
UTC+3
Jet lag
Hardly any (under 3 h)

Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.

Compare & alternatives

Compare

Kea compared

Put Kea side by side with another destination.

Nearby:
Compare with home:

Kea vs Kythnos

In October Kythnos has the better holiday weather (score 70 vs 55). During the day Kythnos is 2 °C warmer than Kea. The sea is about equally warm. Kythnos gets one more hour of sunshine a day.

Kea vs Kythnos, in October
in OctoberKeaKythnos
Holiday weather score5570
Daytime high20°22°
Sea22°22°
Sunshine6 h7 h
Rainy days44
Best timeJul – SepJun – Sep

Through the year

OctoberKea 20°Kythnos 22°
KeaKythnos
Go to Kythnos
Ranking

Greece in October: the best places

In October, Kea ranks 31 among the 31 nearest destinations in this country.

  1. Athens24°23°91
  2. 2Piraeus24°23°91
  3. 3Tolón25°23°85
  4. 4Palaio Faliro24°23°84
  5. 5Elefsina24°23°84
  6. 6Thebes23°84
  7. 7Salamis Island24°23°83
  8. 8Pórto Chéli24°23°83
  9. 31KeaThis page20°22°55
All destinations: Greece

Near Kea

Other destinations close by.

Places with a climate like Kea

Destinations whose weather through the year is closest to Kea's – good alternatives.

  1. 84 % similar52Agios EfstratiosGreece21°20°Best time: Jun – Sep
  2. 83 % similar52SkopelosGreece21°21°Best time: Jun – Sep
  3. 83 % similar46BozcaadaTurkey21°20°Best time: Jun – Sep
  4. 79 % similar51VisCroatia21°21°Best time: Jun – Sep

Frequently asked questions about Kea

When is the best time to visit Kea?

The best time to visit Kea is from July to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.

How warm is the sea in Kea?

The sea temperature in Kea ranges from 15.1 °C in February to 25.0 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.

Can you swim in Kea in October?

Yes. In October the sea averages 22.1 °C – refreshing for a swim.

What is the warmest month in Kea?

August is the warmest month, with average highs of 26 °C and nights around 21 °C. January is the coolest month at 12 °C.

When does it rain most in Kea?

The wettest month is December with 66 mm of precipitation. The driest month is July with 11 mm.

How many hours of sunshine does Kea get?

Kea gets around 2,520 hours of sunshine a year. The sunniest month is July with 11.3 hours a day; in December there are 2.7 hours a day.

What time zone is Kea in?

Kea is on UTC+2 in January and UTC+3 in July.

How long is the flight from London to Kea?

A nonstop flight from London to Kea takes about 3 h 30 min, for a straight-line distance of about 2,480 km.

Which school holidays are best for Kea?

Kea has its best school-holiday weather during the summer holidays (score 100) and its weakest during the Christmas holidays (score 14). Holiday ratings (0–100): Easter holidays 30, May half-term 53, summer holidays 100, October half-term 55, Christmas holidays 14.