AI-generatedMarathon at a glance
- Best time
- Jun – Sep
- Warmest month
- Jul · 34°
- Warmest sea
- Aug · 25.4°
- Sunshine a year
- 2,650 h
- Rain a year
- 389 mm
- Climate
- Mediterranean
- Time zone
- UTC+2 / UTC+3
- Elevation
- 40 m
Climate in Marathon
Marathon 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 12 °C. With around 2,650 hours of sunshine a year, Marathon is sunny; July is the sunniest month with 11.7 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: June – September
Good forBeach & swimmingSightseeing & walks
A typical day in October
- Morning, 08:00: about 15°
- Midday, 13:00: about 23°
- Afternoon, 16:00: about 23°
- Evening, 20:00: about 20°
- Night, 23:00: about 17°
07:3118:48
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 07:15–08:07 · evening 18:12–19:04
- Blue hour
- Morning 07:05–07:15 · evening 19:04–19:15
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.
What is the weather like in Marathon in October?
In October, Marathon is warm: daytime highs average 23 °C, and nights cool down to about 15 °C. The sea averages 21.9 °C – refreshing for a swim. The sun shines for around 7 hours a day. Rain is rare: about 4 days bring 27 mm in total. All in all, October is a good month for a holiday in Marathon.
More details for October
- Daylight
- 11 h 16 min07:31 – 18:48
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 38 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Time zone
- UTC+3Europe/Athens
How the score comes together
- Temperatureweight 35 %72 %
- Seaweight 25 %70 %
- Sunshineweight 20 %58 %
- 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
Sea temperature in Marathon
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 20.6 – 22.9 °C
Swimming season: Jun – Oct
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Marathon ranges from 14.5 °C in February to 25.4 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.
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 24.4 and 26.3 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 14.9° | 14.1° | 15.9° | cold |
| FebruaryFeb | 14.5° | 13.7° | 15.2° | cold |
| MarchMar | 14.8° | 14.1° | 15.5° | cold |
| AprilApr | 15.5° | 14.8° | 16.3° | cold |
| MayMay | 18.0° | 17.1° | 18.8° | fresh |
| JuneJun | 21.8° | 21.1° | 22.7° | refreshing |
| JulyJul | 24.7° | 23.9° | 25.4° | pleasant |
| AugustAug | 25.4° | 24.4° | 26.3° | pleasant |
| SeptemberSep | 24.3° | 23.3° | 25.2° | pleasant |
| OctoberOct | 21.9° | 20.6° | 22.9° | refreshing |
| NovemberNov | 19.1° | 18.0° | 20.2° | fresh |
| DecemberDec | 16.6° | 15.7° | 17.6° | cold |
Sunshine hours in Marathon
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 6.5 of 11.3 hours of daylight in Marathon, 58 % of the day.
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.
UV index in Marathon
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 4 · 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 it, 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.
Rain in Marathon: 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, Marathon has about 4 rainy days with 27 mm of rain in total.
Wind and clouds in Marathon
How breezy and how cloudy Marathon 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 Marathon typically peaks at 19 km/h during the day: Beaufort 3, light breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting: Jul – Sep, Dec – Mar.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 38 % of the sky over Marathon: mostly sunny, with about 6.5 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 and humidity in Marathon
How often the day gets hot in Marathon (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, Marathon has about 1 hot days, with an average daytime high of 23 °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
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Marathon
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°
PleasantOctober: nights around 15°. Ideal for sleeping, often with the window open. Muggy on about 1 days (dew point 18 °C or more).
The coolest nights are in January (5°), the warmest in July (22°). Tropical nights of 20 °C and more are the rule from June to August; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in May and from September to October. Nights fall below 8 °C on average from December to March, so the room should be heated.
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 | 15 | 12° | 5° | 14.9° | 3.4 h | 9 | 58 |
| FebruaryFeb | 19 | 14° | 6° | 14.5° | 4.5 h | 8 | 53 |
| MarchMar | 25 | 16° | 7° | 14.8° | 6.0 h | 8 | 55 |
| AprilApr | 45 | 21° | 10° | 15.5° | 7.9 h | 5 | 30 |
| MayMay | 79 | 27° | 15° | 18.0° | 9.2 h | 4 | 17 |
| JuneJun | 90 | 31° | 20° | 21.8° | 11.0 h | 2 | 10 |
| JulyJul | 86 | 34° | 22° | 24.7° | 11.7 h | 1 | 5 |
| AugustAug | 90 | 33° | 22° | 25.4° | 10.7 h | 1 | 5 |
| SeptemberSep | 99 | 29° | 19° | 24.3° | 8.6 h | 3 | 17 |
| OctoberOct | 74 | 23° | 15° | 21.9° | 6.5 h | 4 | 27 |
| NovemberNov | 28 | 18° | 11° | 19.1° | 4.3 h | 7 | 46 |
| DecemberDec | 13 | 14° | 7° | 16.6° | 3.0 h | 9 | 66 |
Climate averages 1996–2025, 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
38.15° N, 23.96° E · 40 m · Europe/Athens
Best time to visit Marathon
The best time to visit Marathon is from June to September. For a beach holiday with the sea above 21 °C, go from June to October. For sightseeing, day trips and hiking, conditions are most comfortable from March to May and from October to November. From July to August it can get very hot, with highs of up to 34 °C. The wettest month is December with 66 mm of precipitation.
Marathon through the seasons
How the weather changes over the seasons, with averages for each.
Marathon in spring
Mar – May
Fair
- 16–27 °C by day
- Sea 16 °C
- 8 h of sun a day
- 17 rainy days in all
Marathon in summer
Jun – Aug
Excellent
- 31–34 °C by day
- Sea 24 °C
- 11 h of sun a day
- 4 rainy days in all
Marathon in autumn
Sep – Nov
Good
- 18–29 °C by day
- Sea 22 °C
- 7 h of sun a day
- 14 rainy days in all
Marathon in winter
Dec – Feb
Poor
- 12–14 °C by day
- Sea 15 °C
- 4 h of sun a day
- 26 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Marathon for you.
Your best months: September
Based on the climate averages; tap a month to see its details.
Compare two months in Marathon
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 Marathon: score 99 against 74. In September, days are 6 °C warmer than in October. The sea is 2 °C warmer in September. September has one rainy day fewer. The sun shines 2 hours longer a day in September.
| Month | October | September |
|---|---|---|
| Weather score | 74 | 99better |
| Day high | 23° | 29° |
| Night low | 15° | 19° |
| Sea | 21.9° | 24.3° |
| Sunshine | 6.5 h | 8.6 hbetter |
| Rainy days | 4 | 3better |
| Rainfall | 27 mm | 17 mmbetter |
| Muggy days | 1better | 2 |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Jun – Oct
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Mar – May, Oct – Nov
15–28 °C and not too much rain
Peak heat
Jul – Aug
Highs of 33 °C or more
Marathon month by month
The typical weather for every month at a glance.
15January12° · Sea 15° · 3 h
In January, Marathon is cool: daytime highs average 12 °C, and nights cool down to about 5 °C. The sea averages 14.9 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain falls on about 9 days, adding up to 58 mm. All in all, January is not an ideal month for a holiday in Marathon.
Marathon in January19February14° · Sea 15° · 5 h
In February, Marathon is cool: daytime highs average 14 °C, and nights cool down to about 6 °C. The sea averages 14.5 °C – swimming is only for the hardy. Expect around 5 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 Marathon.
Marathon in February25March16° · Sea 15° · 6 h
In March, Marathon is mild: daytime highs average 16 °C, and nights cool down to about 7 °C. The sea averages 14.8 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain falls on about 8 days, adding up to 55 mm. All in all, March is not an ideal month for a holiday in Marathon.
Marathon in March45April21° · Sea 16° · 8 h
In April, Marathon is mild: daytime highs average 21 °C, and nights cool down to about 10 °C. The sea averages 15.5 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. Rain falls on about 5 days, adding up to 30 mm. All in all, April is a so-so month for a holiday in Marathon.
Marathon in April79May27° · Sea 18° · 9 h
In May, Marathon is warm: daytime highs average 27 °C, and nights cool down to about 15 °C. The sea averages 18.0 °C – bracing, so a wetsuit helps for longer swims. With around 9 hours of sunshine a day, there is plenty of sun. Rain is rare: about 4 days bring 17 mm in total. On about 6 days the thermometer climbs to 30 °C or more. All in all, May is a good month for a holiday in Marathon.
Marathon in May90June31° · Sea 22° · 11 h
In June, Marathon is hot: daytime highs average 31 °C, and nights cool down to about 20 °C. The sea averages 21.8 °C – refreshing for a swim. With around 11 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 20 days the thermometer climbs to 30 °C or more. All in all, June is an excellent month for a holiday in Marathon.
Marathon in June86July34° · Sea 25° · 12 h
In July, Marathon is very hot: daytime highs average 34 °C, and even at night it stays warm at around 22 °C. The sea averages 24.7 °C – pleasant for swimming. With around 12 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 28 days the thermometer climbs to 30 °C or more. All in all, July is an excellent month for a holiday in Marathon.
Marathon in July90August33° · Sea 25° · 11 h
In August, Marathon is very hot: daytime highs average 33 °C, and even at night it stays warm at around 22 °C. The sea averages 25.4 °C – pleasant for swimming. With around 11 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 27 days the thermometer climbs to 30 °C or more. All in all, August is an excellent month for a holiday in Marathon.
Marathon in August99September29° · Sea 24° · 9 h
In September, Marathon is hot: daytime highs average 29 °C, and nights cool down to about 19 °C. The sea averages 24.3 °C – pleasant for swimming. The sun shines for around 9 hours a day. Rain is rare: about 3 days bring 17 mm in total. On about 11 days the thermometer climbs to 30 °C or more. All in all, September is an excellent month for a holiday in Marathon.
Marathon in September74October23° · Sea 22° · 7 h
In October, Marathon is warm: daytime highs average 23 °C, and nights cool down to about 15 °C. The sea averages 21.9 °C – refreshing for a swim. The sun shines for around 7 hours a day. Rain is rare: about 4 days bring 27 mm in total. All in all, October is a good month for a holiday in Marathon.
Marathon in October28November18° · Sea 19° · 4 h
In November, Marathon is mild: daytime highs average 18 °C, and nights cool down to about 11 °C. The sea averages 19.1 °C – bracing, so a wetsuit helps for longer swims. Expect around 4 hours of sunshine a day. Rain falls on about 7 days, adding up to 46 mm. All in all, November is not an ideal month for a holiday in Marathon.
Marathon in November13December14° · Sea 17° · 3 h
In December, Marathon is cool: daytime highs average 14 °C, and nights cool down to about 7 °C. The sea averages 16.6 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 9 rainy days and 66 mm in total. All in all, December is not an ideal month for a holiday in Marathon.
Marathon in DecemberMarathon compared
Put Marathon side by side with another destination.
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Marathon vs. Athens
In October the holiday weather in Marathon and Athens is about equally good (score 74 vs. 75). During the day it is about as warm in Athens as in Marathon. The sea in Athens is 1 °C warmer. Athens gets one hour less sunshine a day.
| in October | Marathon | Athens |
|---|---|---|
| Holiday score | 74 | 75 |
| Daytime high | 23° | 23° |
| Sea | 22° | 23° |
| Sunshine | 7 h | 6 h |
| Rainy days | 4 | 4 |
| Best time | Jun – Sep | Apr – May, Sep – Oct |
Through the year
Greece in October: the best places
In October, Marathon ranks 13 among the 31 nearest destinations in this country.
- Athens23°23°91
- 2Piraeus23°23°91
- 3Mycenae23°90
- 4Sparta24°88
- 5Thebes22°84
- 6Mystras21°83
- 7Patras21°23°80
- 8Nafplio23°23°78
- 13MarathonThis page23°22°74
Planning a trip to Marathon
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Marathon 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.
Marathon has its best school-holiday weather during the summer holidays (score 89) and its weakest during the Christmas holidays (score 14).
- 39
Easter holidays
Mar – Apr
Poor
- 20 °C by day
- Sea 15 °C
- 7.3 h of sun a day
- 6 rainy days a month
Good for: Sightseeing & walks
- 81
May half-term
May – Jun
Excellent
- 28 °C by day
- Sea 19 °C
- 9.6 h of sun a day
- 3 rainy days a month
Good for: Sightseeing & walks
- 89
Summer holidays
Jul – Aug
ExcellentBest holidays
- 33 °C by day
- Sea 25 °C
- 11.1 h of sun a day
- 1 rainy day a month
Good for: Beach & swimming
Keep in mind: Peak heat
- 74
October half-term
Oct
Good
- 23 °C by day
- Sea 22 °C
- 6.5 h of sun a day
- 4 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
- 14
Christmas holidays
Dec – Jan
Poor
- 13 °C by day
- Sea 16 °C
- 3.2 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 25 min
- Distance
- 2,410 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.
Frequently asked questions about Marathon
When is the best time to visit Marathon?
The best time to visit Marathon is from June to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Marathon?
The sea temperature in Marathon ranges from 14.5 °C in February to 25.4 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.
Can you swim in Marathon in October?
Yes. In October the sea averages 21.9 °C – refreshing for a swim.
What is the warmest month in Marathon?
July is the warmest month, with average highs of 34 °C and nights around 22 °C. January is the coolest month at 12 °C.
When does it rain most in Marathon?
The wettest month is December with 66 mm of precipitation. The driest month is July with 5 mm.
How many hours of sunshine does Marathon get?
Marathon gets around 2,650 hours of sunshine a year. The sunniest month is July with 11.7 hours a day; in December there are 3.0 hours a day.
What time zone is Marathon in?
Marathon uses the time zone Europe/Athens: UTC+2 in January and UTC+3 in July.
How long is the flight from London to Marathon?
A nonstop flight from London to Marathon takes about 3 h 25 min, for a straight-line distance of about 2,410 km.
Which school holidays are best for Marathon?
Marathon has its best school-holiday weather during the summer holidays (score 89) and its weakest during the Christmas holidays (score 14). Holiday ratings (0–100): Easter holidays 39, May half-term 81, Summer holidays 89, October half-term 74, Christmas holidays 14.
Near Marathon
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