Piraeus, Greece experiences average highs of 23°C (73°F) and lows of 14°C (57°F) throughout the year. The climate is relatively dry, with only 5 rainy days per month on average. Sunshine is abundant, averaging about 10 hours per day. Average highs have stayed broadly stable across the available records.
Piraeus, Greece Weather & Climate 2026
Monthly climate averages for Piraeus, Greece. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Apr–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
7.9/10
Best: May, September, October
UV Index
6
High
Temperature 23°C / 14°C
Feels Like 22°C / 14°C
Rainy Days 5
Rainfall 30 mm
Sunshine 10 h
Humidity 66%
Wind Speed 16 km/h
Dew Point 12°C
Snow Days 1 days
Frost Days 1 days
Hottest Month
34°C
July
Avg Low24°C
Rain2days
Coldest Month
6°C
January
Avg High13°C
Rain8days
Driest Month
2days
July
Avg High34°C
Avg Low24°C
Windiest Month
18 km/h
August (Gusts 46)
Sea Temperature
16°C – 27°C
Warmest water: August (
27.4°C
)
Worst Time to Visit
Consider avoiding January, February, December due to less favorable weather conditions.
Sun Position
Sunrise 06:04
Daylight 14.8h
Sunset 20:51
Live conditions—
Piraeus on the map · live conditions
Piraeus, Greece
- Continent
- Europe
- Country
- Greece
- City
- Piraeus
- Population
- 163.7K
- Coordinates
- 37.94°, 23.65°
Seasonal Breakdown
Spring
Mar–May
Avg High 21°C
Avg Low 12°C
Rain 5 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 33°C
Avg Low 23°C
Rain 3 days/mo
Autumn
Sep–Nov
Avg High 24°C
Avg Low 16°C
Rain 4 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 14°C
Avg Low 7°C
Rain 8 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 13°C / 6°C . Feb: 14°C / 7°C . Mar: 17°C / 9°C . Apr: 21°C / 12°C . May: 26°C / 16°C . Jun: 31°C / 21°C . Jul: 34°C / 24°C . Aug: 33°C / 24°C . Sep: 29°C / 20°C . Oct: 24°C / 16°C . Nov: 19°C / 12°C . Dec: 14°C / 8°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 50 mm. Feb: 38 mm. Mar: 39 mm. Apr: 31 mm. May: 23 mm. Jun: 22 mm. Jul: 8 mm. Aug: 11 mm. Sep: 16 mm. Oct: 22 mm. Nov: 43 mm. Dec: 53 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 78%. Feb: 77%. Mar: 72%. Apr: 66%. May: 61%. Jun: 55%. Jul: 48%. Aug: 52%. Sep: 60%. Oct: 70%. Nov: 77%. Dec: 79%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 16 km/h . Feb: 16 km/h . Mar: 16 km/h . Apr: 15 km/h . May: 15 km/h . Jun: 15 km/h . Jul: 17 km/h . Aug: 18 km/h . Sep: 16 km/h . Oct: 15 km/h . Nov: 15 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 8h. Mar: 10h. Apr: 11h. May: 12h. Jun: 13h. Jul: 13h. Aug: 13h. Sep: 11h. Oct: 9h. Nov: 8h. Dec: 7h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 17°C . Feb: 16°C . Mar: 16°C . Apr: 17°C . May: 19°C . Jun: 24°C . Jul: 27°C . Aug: 27°C . Sep: 26°C . Oct: 24°C . Nov: 22°C . Dec: 18°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 6. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 8. Aug: UV 8. Sep: UV 7. Oct: UV 5. Nov: UV 4. Dec: UV 3.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 1 days. Feb: 1 days. Mar: 0 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 0 days. Dec: 0 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending wetter by about 10 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 36°C | Jul · 34°C |
| Coldest month | Feb 2025 · 6°C | Jan · 6°C |
| Wettest month | Dec 2025 · 65 mm | Dec · 53 mm |
| Windiest month | Aug 2025 · 19 km/h | Aug · 18 km/h |
Month-by-Month Weather Table
January
Fair 
February
Fair March
Good April
Excellent May best
Excellent June
Excellent July
Good August
Good September best
Excellent October best
Excellent November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 13°C / 6°C | 10°C / 3°C | 8days (50 mm) Wet | 7.3h Good | 78% Humid | 2.9 Moderate | Fair | View Details |
| February | 14°C / 7°C | 12°C / 4°C | 7days (38 mm) Good | 8.1h Good | 77% Humid | 3.9 Moderate | Fair | View Details |
| March | 17°C / 9°C | 15°C / 6°C | 6days (39 mm) Good | 9.8h Good | 72% Muggy | 5.8 High | Good | View Details |
| April | 21°C / 12°C | 20°C / 10°C | 5days (31 mm) Good | 11.2h Excellent | 66% Muggy | 6.9 High | Excellent | View Details |
| May best | 26°C / 16°C | 26°C / 16°C | 5days (23 mm) Good | 12.3h Excellent | 61% Muggy | 7.6 Very High | Excellent | View Details |
| June | 31°C / 21°C | 33°C / 23°C | 4days (22 mm) Good | 13.1h Excellent | 55% Moderate | 8.2 Very High | Excellent | View Details |
| July | 34°C / 24°C | 35°C / 26°C | 2days (8 mm) Excellent | 13.1h Excellent | 48% Moderate | 8.4 Very High | Good | View Details |
| August | 33°C / 24°C | 34°C / 25°C | 2days (11 mm) Excellent | 12.5h Excellent | 52% Moderate | 7.8 Very High | Good | View Details |
| September best | 29°C / 20°C | 29°C / 21°C | 2days (16 mm) Excellent | 10.9h Excellent | 60% Moderate | 6.6 High | Excellent | View Details |
| October best | 24°C / 16°C | 23°C / 16°C | 3days (22 mm) Excellent | 9.4h Good | 70% Muggy | 5 Moderate | Excellent | View Details |
| November | 19°C / 12°C | 17°C / 11°C | 6days (43 mm) Good | 7.7h Good | 77% Humid | 3.5 Moderate | Good | View Details |
| December | 14°C / 8°C | 12°C / 6°C | 8days (53 mm) Wet | 7h Good | 79% Humid | 2.7 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Piraeus are May, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Piraeus, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Piraeus is July, with average daytime highs of 34°C (93°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Piraeus is January, with average overnight lows of 6°C (43°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Piraeus is December, averaging 53mm of precipitation across 8 rainy days. An umbrella or waterproof jacket is essential.
Piraeus receives approximately 122 sunshine hours per year. The sunniest month is June with around 13 hours. Based on climate data for Piraeus.
The least favorable months to visit Piraeus are January, February, December, primarily due to less favorable weather conditions. For the best conditions, consider May, September, October instead.
The annual average UV index in Piraeus is 6, classified as high. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Piraeus is 66%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in June, July, August, September, October average 26°C (79°F), which is warm and comfortable for swimming and water activities.
Yes, Piraeus receives snow. Months with snowfall average 1 snow days and 1 cm (0 in) of accumulation, with about 1 frost days during winter.
Average wind speeds in Piraeus are 16 km/h (10 mph). The windiest month is August with peak winds reaching 18 km/h (11 mph) (gusts up to 46 km/h / 29 mph).
Piraeus averages 12 clear-sky days per month with overall cloud cover around 36%. The clearest skies occur in July.
The annual average dew point in Piraeus is 12°C (54°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Piraeus has a Hot Semi-Arid climate, classified as BSh under the Köppen system. Arid climates have very low rainfall relative to temperature, with large swings between daytime heat and cool nights.
The 'feels like' temperature in Piraeus ranges from 14°C (57°F) to 22°C (72°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Piraeus. It earns a climate score of 8.6/10 with Excellent.
For June in Piraeus, pack Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Sandals. With average highs of 31°C (88°F) and 4 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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