AI-generatedErmioni at a glance
- Best time
- May – Oct
- Warmest month
- Jul · 34°
- Warmest sea
- Aug · 26.3°
- Sunshine a year
- 2,790 h
- Rain a year
- 342 mm
- Climate
- Mediterranean
- Time zone
- UTC+2 / UTC+3
- Elevation
- 16 m
Climate in Ermioni
Ermioni has a Mediterranean climate with warm to hot, dry summers and mild, wetter winters. July is the warmest month with average highs of 34 °C, while January is the coolest at 14 °C. With around 2,790 hours of sunshine a year, Ermioni is sunny; July is the sunniest month with 11.9 hours a day.
Holiday weather through the year
Best time to visit Ermioni
The best time to visit Ermioni is from May to October. For a beach holiday – sea from 21 °C, warm and mostly dry – go from June to October. For sightseeing, day trips and hiking, conditions are most comfortable from March to May and from October to December. From July to August it can get very hot, with highs of up to 34 °C. The wettest month is December with 53 mm of precipitation.
Ermioni through the seasons
How the weather changes over the seasons, with averages for each.
Ermioni in spring
Mar – May
Fair
- 17–26 °C by day
- Sea 17 °C
- 8.0 h of sun a day
- 14 rainy days in all
Ermioni in summer
Jun – Aug
Excellent
- 31–34 °C by day
- Sea 25 °C
- 11.3 h of sun a day
- 4 rainy days in all
Ermioni in autumn
Sep – Nov
Good
- 20–29 °C by day
- Sea 23 °C
- 6.5 h of sun a day
- 13 rainy days in all
Ermioni in winter
Dec – Feb
Poor
- 14–16 °C by day
- Sea 16 °C
- 4.7 h of sun a day
- 21 rainy days in all
Which month for what?
Beach & swimming
Jun – Oct
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Mar – May, Oct – Dec
15–28 °C and not too much rain
Peak heat
Jul – Aug
Highs of 33 °C or more
Find your perfect month
Tell us what you like and we rate every month in Ermioni for you.
Your best months: June, September
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Excellent
Best time to visit: May – October
Where to go in OctoberSea temperature in October
Good forBeach & swimmingSightseeing & walks
A typical day in October
- Morning, 08:00: about 18°
- Midday, 13:00: about 23°
- Afternoon, 16:00: about 24°
- Evening, 20:00: about 21°
- Night, 23:00: about 20°
07:3418:52
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 07:18–08:09 · evening 18:16–19:08
- Blue hour
- Morning 07:07–07:18 · evening 19:08–19:18
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 Ermioni compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 26° at the start of the month to 22° at the end. The sea cools from 24° to 22°. The days get 1.1 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 26° | 22° |
| Night-time low | 19° | 15° |
| Sea | 24° | 22° |
| Daylight | 11.8 h | 10.7 h |
What is the weather like in Ermioni in October?
In October, Ermioni is warm: daytime highs average 24 °C, and nights cool down to about 17 °C. The sea averages 23.1 °C – pleasant for swimming. Expect around 6.3 hours of sunshine a day. Rain is rare: about 4 days bring 28 mm in total. All in all, October is an excellent month for a holiday in Ermioni.
More details for October
- Daylight
- 11 h 18 min07:34 – 18:52
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 14 km/haverage daily peakAll months
- Cloud cover
- 36 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Time zone
- UTC+3offset from UTC
How the score comes together
- Temperatureweight 35 %85 %
- Seaweight 25 %87 %
- Sunshineweight 20 %55 %
- Few rainy daysweight 20 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
Compare two months in Ermioni
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
September has the better holiday weather in Ermioni: score 98 against 83. In September, days are 5 °C warmer than in October. The sea is 2 °C warmer in September. The sun shines 2 hours longer a day in September.
| Month | October | September |
|---|---|---|
| Holiday weather score | 83 | 98better |
| Daytime high | 24° | 29° |
| Night-time low | 17° | 21° |
| Sea | 23.1° | 25.2° |
| Sunshine | 6.3 h | 8.4 hbetter |
| Rainy days | 4 | 4 |
| Rainfall | 28 mm | 26 mm |
| Muggy days | 1better | 6 |
Based on the climate averages 1996–2025.
Ermioni month by month
The typical weather for every month at a glance.
21January14° · Sea 16° · 4.6 h
In January, Ermioni is cool: daytime highs average 14 °C, and nights cool down to about 8 °C. The sea averages 16.0 °C – swimming is only for the hardy. Expect around 4.6 hours of sunshine a day. Rain falls on about 7 days, adding up to 49 mm. All in all, January is not an ideal month for a holiday in Ermioni.
Ermioni in January25February15° · Sea 15° · 5.5 h
In February, Ermioni is cool: daytime highs average 15 °C, and nights cool down to about 8 °C. The sea averages 15.3 °C – swimming is only for the hardy. Expect around 5.5 hours of sunshine a day. Rain falls on about 6 days, adding up to 42 mm. All in all, February is not an ideal month for a holiday in Ermioni.
Ermioni in February29March17° · Sea 15° · 6.6 h
In March, Ermioni is mild: daytime highs average 17 °C, and nights cool down to about 10 °C. The sea averages 15.4 °C – swimming is only for the hardy. The sun shines for around 6.6 hours a day. Rain falls on about 6 days, adding up to 45 mm. All in all, March is not an ideal month for a holiday in Ermioni.
Ermioni in March49April21° · Sea 16° · 8.2 h
In April, Ermioni is warm: daytime highs average 21 °C, and nights cool down to about 13 °C. The sea averages 16.4 °C – swimming is only for the hardy. The sun shines for around 8.2 hours a day. Rain is rare: about 4 days bring 20 mm in total. All in all, April is a so-so month for a holiday in Ermioni.
Ermioni in April83May26° · Sea 19° · 9.3 h
In May, Ermioni is warm: daytime highs average 26 °C, and nights cool down to about 17 °C. The sea averages 19.2 °C – bracing, so a wetsuit helps for longer swims. With around 9.3 hours of sunshine a day, there is plenty of sun. Rain is rare: about 4 days bring 16 mm in total. All in all, May is an excellent month for a holiday in Ermioni.
Ermioni in May96June31° · Sea 23° · 11.5 h
In June, Ermioni is hot: daytime highs average 31 °C, and even at night it stays warm at around 21 °C. The sea averages 22.9 °C – refreshing for a swim. With around 11.5 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 17 days the thermometer climbs to 30 °C or more. All in all, June is an excellent month for a holiday in Ermioni.
Ermioni in June86July34° · Sea 26° · 11.9 h
In July, Ermioni is very hot: daytime highs average 34 °C, and even at night it stays warm at around 24 °C. The sea averages 25.7 °C – pleasant for swimming. With around 11.9 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 30 days the thermometer climbs to 30 °C or more. All in all, July is an excellent month for a holiday in Ermioni.
Ermioni in July89August33° · Sea 26° · 10.6 h
In August, Ermioni is very hot: daytime highs average 33 °C, and even at night it stays warm at around 24 °C. The sea averages 26.3 °C – lovely and warm for swimming. With around 10.6 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 29 days the thermometer climbs to 30 °C or more. All in all, August is an excellent month for a holiday in Ermioni.
Ermioni in August98September29° · Sea 25° · 8.4 h
In September, Ermioni is hot: daytime highs average 29 °C, and even at night it stays warm at around 21 °C. The sea averages 25.2 °C – pleasant for swimming. The sun shines for around 8.4 hours a day. Rain is rare: about 4 days bring 26 mm in total. On about 12 days the thermometer climbs to 30 °C or more. All in all, September is an excellent month for a holiday in Ermioni.
Ermioni in September83October24° · Sea 23° · 6.3 h
In October, Ermioni is warm: daytime highs average 24 °C, and nights cool down to about 17 °C. The sea averages 23.1 °C – pleasant for swimming. Expect around 6.3 hours of sunshine a day. Rain is rare: about 4 days bring 28 mm in total. All in all, October is an excellent month for a holiday in Ermioni.
Ermioni in October40November20° · Sea 21° · 4.7 h
In November, Ermioni is mild: daytime highs average 20 °C, and nights cool down to about 14 °C. The sea averages 20.6 °C – refreshing for a swim. Expect around 4.7 hours of sunshine a day. Rain falls on about 6 days, adding up to 44 mm. All in all, November is a so-so month for a holiday in Ermioni.
Ermioni in November22December16° · Sea 18° · 4.0 h
In December, Ermioni is cool: daytime highs average 16 °C, and nights cool down to about 10 °C. The sea averages 18.0 °C – bracing, so a wetsuit helps for longer swims. Expect around 4.0 hours of sunshine a day. Rain falls on about 8 days, adding up to 53 mm. All in all, December is not an ideal month for a holiday in Ermioni.
Ermioni in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Ermioni
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- Hot 24° and more
PleasantOctober: nights around 17°. Ideal for sleeping, often with the window open. Muggy on about 1 day (dew point 18 °C or more).
The coolest nights are in January (8°), the warmest in August (24°). Tropical nights of 20 °C and more are the rule from June to September; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in May and in October.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 21 | 14° | 8° | 16.0° | 4.6 h | 7 | 49 |
| FebruaryFeb | 25 | 15° | 8° | 15.3° | 5.5 h | 6 | 42 |
| MarchMar | 29 | 17° | 10° | 15.4° | 6.6 h | 6 | 45 |
| AprilApr | 49 | 21° | 13° | 16.4° | 8.2 h | 4 | 20 |
| MayMay | 83 | 26° | 17° | 19.2° | 9.3 h | 4 | 16 |
| JuneJun | 96 | 31° | 21° | 22.9° | 11.5 h | 2 | 8 |
| JulyJul | 86 | 34° | 24° | 25.7° | 11.9 h | 1 | 3 |
| AugustAug | 89 | 33° | 24° | 26.3° | 10.6 h | 1 | 8 |
| SeptemberSep | 98 | 29° | 21° | 25.2° | 8.4 h | 4 | 26 |
| OctoberOct | 83 | 24° | 17° | 23.1° | 6.3 h | 4 | 28 |
| NovemberNov | 40 | 20° | 14° | 20.6° | 4.7 h | 6 | 44 |
| DecemberDec | 22 | 16° | 10° | 18.0° | 4.0 h | 8 | 53 |
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
37.38° N, 23.25° E · 16 m · Europe/Athens
Sea temperature
Sea temperature in Ermioni
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 22.0 – 23.9 °C
Swimming season: Jun – Nov
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Ermioni ranges from 15.3 °C in February to 26.3 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to November.
The sea warms up slowly: it is warmest in August, while the air already peaks in July. From November to February 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 25.4 and 27.1 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 16.0° | 15.0° | 17.1° | cold |
| FebruaryFeb | 15.3° | 14.7° | 16.0° | cold |
| MarchMar | 15.4° | 14.7° | 16.0° | cold |
| AprilApr | 16.4° | 15.7° | 17.1° | cold |
| MayMay | 19.2° | 18.3° | 20.1° | fresh |
| JuneJun | 22.9° | 22.3° | 23.7° | refreshing |
| JulyJul | 25.7° | 24.9° | 26.7° | pleasant |
| AugustAug | 26.3° | 25.4° | 27.1° | warm |
| SeptemberSep | 25.2° | 24.3° | 26.1° | pleasant |
| OctoberOct | 23.1° | 22.0° | 23.9° | pleasant |
| NovemberNov | 20.6° | 19.5° | 21.6° | refreshing |
| DecemberDec | 18.0° | 16.7° | 19.2° | fresh |
Sunshine
Sunshine hours in Ermioni
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 6.3 of 11.3 hours of daylight in Ermioni, 56 % 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 Ermioni: 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.
In October, Ermioni has about 4 rainy days with 28 mm of rain in total.
UV index
UV index in Ermioni
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 10).
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 Ermioni
How breezy and how cloudy Ermioni 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.
In October, the wind in Ermioni typically peaks at 14 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.
In October, cloud covers on average 36 % of the sky over Ermioni: mostly sunny, with about 6.3 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 Ermioni
How often the day gets hot in Ermioni (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Ermioni has about 1 hot day, with an average daytime high of 24 °C: pleasant. Heat plays no part this month.
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 Ermioni
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Ermioni 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.
Ermioni has its best school-holiday weather during the summer holidays (score 88) and its weakest during the Christmas holidays (score 22).
- 43
Easter holidays
Mar – Apr
Fair
- 20 °C by day
- Sea 16 °C
- 7.7 h of sun a day
- 5 rainy days a month
Good for: Sightseeing & walks
- 86
May half-term
May – Jun
Excellent
- 27 °C by day
- Sea 20 °C
- 9.7 h of sun a day
- 3 rainy days a month
Good for: Sightseeing & walks
- 88
Summer holidays
Jul – Aug
ExcellentBest holidays
- 33 °C by day
- Sea 26 °C
- 11.1 h of sun a day
- 1 rainy day a month
Good for: Beach & swimming
Keep in mind: Peak heat
- 83
October half-term
Oct
Excellent
- 24 °C by day
- Sea 23 °C
- 6.3 h of sun a day
- 4 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
- 22
Christmas holidays
Dec – Jan
Poor
- 15 °C by day
- Sea 17 °C
- 4.3 h of sun a day
- 7 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 3 h 25 min
- Distance
- 2,430 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.
Good to know: Greece
- Currency
- Euro (EUR)
- Language
- Greek
- Sockets
- Type C, F · 230 V
- Traffic
- Drives on the right
- Dialling code
- +30
- Emergency number
- 112
UK plugs need a travel adapter
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Compare & alternatives
Compare with another place
Ermioni compared
Put Ermioni side by side with another destination.
Ermioni vs Pórto Chéli
In October the holiday weather in Ermioni and Pórto Chéli is about equally good (score 83 vs 83). During the day it is about as warm in Pórto Chéli as in Ermioni. The sea is about equally warm.
| in October | Ermioni | Pórto Chéli |
|---|---|---|
| Holiday weather score | 83 | 83 |
| Daytime high | 24° | 24° |
| Sea | 23° | 23° |
| Sunshine | 6 h | 6 h |
| Rainy days | 4 | 4 |
| Best time | May – Oct | May – Oct |
Through the year
Best places in the country
Greece in October: the best places
In October, Ermioni ranks 14 among the 31 nearest destinations in this country.
- Piraeus24°23°91
- 2Athens25°23°91
- 3Mycenae24°90
- 4Sparta25°88
- 5Tolón25°23°85
- 6Nafplio25°23°85
- 7Thebes23°85
- 8Árgos25°23°84
- 14ErmioniThis page24°23°83
Places nearby
Near Ermioni
Other destinations close by.
Places with a similar climate
Places with a climate like Ermioni
Destinations whose weather through the year is closest to Ermioni's – good alternatives.
Frequently asked questions about Ermioni
When is the best time to visit Ermioni?
The best time to visit Ermioni is from May to October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Ermioni?
The sea temperature in Ermioni ranges from 15.3 °C in February to 26.3 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to November.
Can you swim in Ermioni in October?
Yes. In October the sea averages 23.1 °C – pleasant for swimming.
What is the warmest month in Ermioni?
July is the warmest month, with average highs of 34 °C and nights around 24 °C. January is the coolest month at 14 °C.
When does it rain most in Ermioni?
The wettest month is December with 53 mm of precipitation. The driest month is July with 3 mm.
How many hours of sunshine does Ermioni get?
Ermioni gets around 2,790 hours of sunshine a year. The sunniest month is July with 11.9 hours a day; in December there are 4.0 hours a day.
What time zone is Ermioni in?
Ermioni is on UTC+2 in January and UTC+3 in July.
How long is the flight from London to Ermioni?
A nonstop flight from London to Ermioni takes about 3 h 25 min, for a straight-line distance of about 2,430 km.
Which school holidays are best for Ermioni?
Ermioni has its best school-holiday weather during the summer holidays (score 88) and its weakest during the Christmas holidays (score 22). Holiday ratings (0–100): Easter holidays 43, May half-term 86, summer holidays 88, October half-term 83, Christmas holidays 22.