AI-generatedPiraeus at a glance
- Best time
- Apr – May, Sep – Oct
- Warmest month
- Jul · 34°
- Warmest sea
- Aug · 26.2°
- Sunshine a year
- 2,570 h
- Rain a year
- 366 mm
- Climate
- Mediterranean
- Time zone
- UTC+2 / UTC+3
- Elevation
- 29 m
Climate in Piraeus
Piraeus 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 2,570 hours of sunshine a year, Piraeus is sunny; July is the sunniest month with 11.6 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Excellent
Best time to visit: April – May, September – October
Good forBeach & swimmingSightseeing & walks
A typical day in October
- Morning, 08:00: about 16°
- Midday, 13:00: about 22°
- Afternoon, 16:00: about 23°
- Evening, 20:00: about 20°
- Night, 23:00: about 18°
07:3318:49
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 07:16–08:08 · evening 18:14–19:06
- Blue hour
- Morning 07:06–07:16 · evening 19:06–19:16
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 Piraeus in October?
In October, Piraeus is warm: daytime highs average 23 °C, and nights cool down to about 16 °C. The sea averages 23.0 °C – pleasant for swimming. Expect around 6 hours of sunshine a day. Rain is rare: about 4 days bring 26 mm in total. All in all, October is an excellent month for a holiday in Piraeus.
More details for October
- Daylight
- 11 h 17 min07:33 – 18:49
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 2 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 38 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+3Europe/Athens
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %53 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Swimwear
- Sunscreen
- A jumper for the evenings
Sea temperature in Piraeus
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 21.9 – 23.9 °C
Swimming season: Jun – Nov
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Piraeus ranges from 14.7 °C in February to 26.2 °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 27.0 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 15.5° | 14.6° | 16.6° | cold |
| FebruaryFeb | 14.7° | 14.1° | 15.4° | cold |
| MarchMar | 14.9° | 14.2° | 15.6° | cold |
| AprilApr | 16.0° | 15.3° | 16.7° | cold |
| MayMay | 18.8° | 17.8° | 19.4° | fresh |
| JuneJun | 22.5° | 21.8° | 23.2° | refreshing |
| JulyJul | 25.4° | 24.6° | 26.3° | pleasant |
| AugustAug | 26.2° | 25.4° | 27.0° | warm |
| SeptemberSep | 25.2° | 24.4° | 25.9° | pleasant |
| OctoberOct | 23.0° | 21.9° | 23.9° | pleasant |
| NovemberNov | 20.4° | 19.2° | 21.5° | refreshing |
| DecemberDec | 17.6° | 16.5° | 18.9° | fresh |
Sunshine hours in Piraeus
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 6.2 of 11.3 hours of daylight in Piraeus, 55 % 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 Piraeus
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 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 Piraeus: 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, Piraeus has about 4 rainy days with 26 mm of rain in total.
Wind and clouds in Piraeus
How breezy and how cloudy Piraeus 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 Piraeus typically peaks at 15 km/h during the day: Beaufort 3, light 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 38 % of the sky over Piraeus: mostly sunny, with about 6.2 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 Piraeus
How often the day gets hot in Piraeus (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, Piraeus 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 Piraeus
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 16°. Ideal for sleeping, often with the window open. Muggy on about 2 days (dew point 18 °C or more).
The coolest nights are in January (6°), the warmest in July (23°). 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. Nights fall below 8 °C on average from January to February, 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 | 45 | 12° | 6° | 15.5° | 3.3 h | 8 | 50 |
| FebruaryFeb | 54 | 13° | 6° | 14.7° | 4.3 h | 7 | 46 |
| MarchMar | 73 | 16° | 8° | 14.9° | 5.8 h | 7 | 49 |
| AprilApr | 93 | 20° | 11° | 16.0° | 7.7 h | 5 | 29 |
| MayMay | 98 | 26° | 16° | 18.8° | 8.9 h | 5 | 21 |
| JuneJun | 76 | 31° | 21° | 22.5° | 10.8 h | 3 | 13 |
| JulyJul | 59 | 34° | 23° | 25.4° | 11.6 h | 1 | 6 |
| AugustAug | 63 | 33° | 23° | 26.2° | 10.6 h | 1 | 7 |
| SeptemberSep | 89 | 28° | 20° | 25.2° | 8.3 h | 3 | 16 |
| OctoberOct | 91 | 23° | 16° | 23.0° | 6.2 h | 4 | 26 |
| NovemberNov | 78 | 18° | 12° | 20.4° | 4.0 h | 7 | 46 |
| DecemberDec | 50 | 14° | 8° | 17.6° | 2.8 h | 8 | 58 |
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
37.94° N, 23.65° E · 29 m · Europe/Athens
Best time to visit Piraeus
The best time to visit Piraeus is from April to May and from September to October. 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 58 mm of precipitation.
Piraeus through the seasons
How the weather changes over the seasons, with averages for each.
Piraeus in spring
Mar – May
Excellent
- 16–26 °C by day
- Sea 17 °C
- 8 h of sun a day
- 17 rainy days in all
Piraeus in summer
Jun – Aug
Good
- 31–34 °C by day
- Sea 25 °C
- 11 h of sun a day
- 6 rainy days in all
Piraeus in autumn
Sep – Nov
Excellent
- 18–28 °C by day
- Sea 23 °C
- 6 h of sun a day
- 13 rainy days in all
Piraeus in winter
Dec – Feb
Fair
- 12–14 °C by day
- Sea 16 °C
- 4 h of sun a day
- 23 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Piraeus for you.
Your best months: April – May, October
Based on the climate averages; tap a month to see its details.
Compare two months in Piraeus
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
May has the better holiday weather in Piraeus: score 98 against 91. In May, days are 3 °C warmer than in October. The sea is 4 °C cooler in May. May has one more rainy day. The sun shines 3 hours longer a day in May.
| Month | October | May |
|---|---|---|
| Weather score | 91 | 98better |
| Day high | 23° | 26° |
| Night low | 16° | 16° |
| Sea | 23.0° | 18.8° |
| Sunshine | 6.2 h | 8.9 hbetter |
| Rainy days | 4better | 5 |
| Rainfall | 26 mm | 21 mm |
| Muggy days | 2 | 0better |
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
Piraeus month by month
The typical weather for every month at a glance.
45January12° · Sea 16° · 3 h
In January, Piraeus is cool: daytime highs average 12 °C, and nights cool down to about 6 °C. The sea averages 15.5 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain falls on about 8 days, adding up to 50 mm. All in all, January is a so-so month for a holiday in Piraeus.
Piraeus in January54February13° · Sea 15° · 4 h
In February, Piraeus is cool: daytime highs average 13 °C, and nights cool down to about 6 °C. The sea averages 14.7 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain falls on about 7 days, adding up to 46 mm. All in all, February is a so-so month for a holiday in Piraeus.
Piraeus in February73March16° · Sea 15° · 6 h
In March, Piraeus is cool: daytime highs average 16 °C, and nights cool down to about 8 °C. The sea averages 14.9 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain falls on about 7 days, adding up to 49 mm. All in all, March is a good month for a holiday in Piraeus.
Piraeus in March93April20° · Sea 16° · 8 h
In April, Piraeus is mild: daytime highs average 20 °C, and nights cool down to about 11 °C. The sea averages 16.0 °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 29 mm. All in all, April is an excellent month for a holiday in Piraeus.
Piraeus in April98May26° · Sea 19° · 9 h
In May, Piraeus is warm: daytime highs average 26 °C, and nights cool down to about 16 °C. The sea averages 18.8 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 9 hours a day. Rain is rare: about 5 days bring 21 mm in total. All in all, May is an excellent month for a holiday in Piraeus.
Piraeus in May76June31° · Sea 23° · 11 h
In June, Piraeus is hot: daytime highs average 31 °C, and even at night it stays warm at around 21 °C. The sea averages 22.5 °C – refreshing for a swim. With around 11 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 13 mm in total. On about 18 days the thermometer climbs to 30 °C or more. All in all, June is a good month for a holiday in Piraeus.
Piraeus in June59July34° · Sea 25° · 12 h
In July, Piraeus is very hot: daytime highs average 34 °C, and even at night it stays warm at around 23 °C. The sea averages 25.4 °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 a so-so month for a holiday in Piraeus.
Piraeus in July63August33° · Sea 26° · 11 h
In August, Piraeus is very hot: daytime highs average 33 °C, and even at night it stays warm at around 23 °C. The sea averages 26.2 °C – lovely and warm 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 a good month for a holiday in Piraeus.
Piraeus in August89September28° · Sea 25° · 8 h
In September, Piraeus is hot: daytime highs average 28 °C, and nights cool down to about 20 °C. The sea averages 25.2 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is rare: about 3 days bring 16 mm in total. On about 10 days the thermometer climbs to 30 °C or more. All in all, September is an excellent month for a holiday in Piraeus.
Piraeus in September91October23° · Sea 23° · 6 h
In October, Piraeus is warm: daytime highs average 23 °C, and nights cool down to about 16 °C. The sea averages 23.0 °C – pleasant for swimming. Expect around 6 hours of sunshine a day. Rain is rare: about 4 days bring 26 mm in total. All in all, October is an excellent month for a holiday in Piraeus.
Piraeus in October78November18° · Sea 20° · 4 h
In November, Piraeus is mild: daytime highs average 18 °C, and nights cool down to about 12 °C. The sea averages 20.4 °C – refreshing for a swim. Expect around 4 hours of sunshine a day. Rain falls on about 7 days, adding up to 46 mm. All in all, November is a good month for a holiday in Piraeus.
Piraeus in November50December14° · Sea 18° · 3 h
In December, Piraeus is cool: daytime highs average 14 °C, and nights cool down to about 8 °C. The sea averages 17.6 °C – bracing, so a wetsuit helps for longer swims. The sun is scarce, with only about 3 hours a day. Rain falls on about 8 days, adding up to 58 mm. All in all, December is a so-so month for a holiday in Piraeus.
Piraeus in DecemberPiraeus compared
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Piraeus vs. Athens
In October the holiday weather in Piraeus and Athens is about equally good (score 91 vs. 91). During the day it is about as warm in Athens as in Piraeus. The sea is about equally warm.
| in October | Piraeus | Athens |
|---|---|---|
| Holiday score | 91 | 91 |
| Daytime high | 23° | 23° |
| Sea | 23° | 23° |
| Sunshine | 6 h | 6 h |
| Rainy days | 4 | 4 |
| Best time | Apr – May, Sep – Oct | Apr – May, Sep – Oct |
Through the year
Greece in October: the best places
In October, Piraeus ranks 1 among the 31 nearest destinations in this country.
- PiraeusThis page23°23°91
- 2Athens23°23°91
- 3Mycenae23°90
- 4Sparta24°88
- 5Thebes22°84
- 6Mystras21°83
- 7Patras21°23°80
- 8Olympia22°80
Planning a trip to Piraeus
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Piraeus 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.
Piraeus has its best school-holiday weather during May half-term (score 94) and its weakest during the Christmas holidays (score 48).
- 87
Easter holidays
Mar – Apr
Excellent
- 19 °C by day
- Sea 16 °C
- 7.1 h of sun a day
- 6 rainy days a month
Good for: Sightseeing & walks
- 94
May half-term
May – Jun
ExcellentBest holidays
- 27 °C by day
- Sea 20 °C
- 9.3 h of sun a day
- 4 rainy days a month
Good for: Sightseeing & walks
- 62
Summer holidays
Jul – Aug
Good
- 33 °C by day
- Sea 26 °C
- 11.0 h of sun a day
- 1 rainy day a month
Good for: Beach & swimming
Keep in mind: Peak heat
- 91
October half-term
Oct
Excellent
- 23 °C by day
- Sea 23 °C
- 6.2 h of sun a day
- 4 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
- 48
Christmas holidays
Dec – Jan
Fair
- 13 °C by day
- Sea 17 °C
- 3.1 h of sun a day
- 8 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 Piraeus
When is the best time to visit Piraeus?
The best time to visit Piraeus is from April to May and from September to October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Piraeus?
The sea temperature in Piraeus ranges from 14.7 °C in February to 26.2 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to November.
Can you swim in Piraeus in October?
Yes. In October the sea averages 23.0 °C – pleasant for swimming.
What is the warmest month in Piraeus?
July is the warmest month, with average highs of 34 °C and nights around 23 °C. January is the coolest month at 12 °C.
When does it rain most in Piraeus?
The wettest month is December with 58 mm of precipitation. The driest month is July with 6 mm.
How many hours of sunshine does Piraeus get?
Piraeus gets around 2,570 hours of sunshine a year. The sunniest month is July with 11.6 hours a day; in December there are 2.8 hours a day.
What time zone is Piraeus in?
Piraeus uses the time zone Europe/Athens: UTC+2 in January and UTC+3 in July.
How long is the flight from London to Piraeus?
A nonstop flight from London to Piraeus takes about 3 h 25 min, for a straight-line distance of about 2,410 km.
Which school holidays are best for Piraeus?
Piraeus has its best school-holiday weather during May half-term (score 94) and its weakest during the Christmas holidays (score 48). Holiday ratings (0–100): Easter holidays 87, May half-term 94, Summer holidays 62, October half-term 91, Christmas holidays 48.
Near Piraeus
Other destinations close by.
Places with a climate like Piraeus
Destinations whose weather through the year is closest to Piraeus's – good alternatives.