Piraeus Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Piraeus.
Climate overview of Piraeus
Temperatures in Piraeus, Attica, Greece, vary greatly throughout the year. July is the hottest month at 33°C (91°F), while January is the coldest at 14°C (57°F).
The city tends toward dry conditions, with around 399 mm (16 in) of rainfall per year. It does, however, have a distinct dry season from April to October, with very warm summers and mild winters. The sunniest month is July, with 12.1 hours of sunshine per day on average.
Piraeus Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Piraeus - and find the best time to visit.
Monthly Temperature in Piraeus
The climate in Piraeus is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 33°C (91°F) in July to a moderate 14°C (57°F) in the coolest month, January.
Nights vary from 23°C (73°F) in July to around 7°C (45°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Piraeus
Piraeus maintains relatively dry conditions year-round, recording average annual precipitation of 399 mm (16 in). The climate in Piraeus shows significant variation throughout the year. Expect moderate rainfall in December, the wettest month, with an average of 65 mm (2.6 in) of precipitation over 10 rainy days.
In contrast, the driest month August offers drier and sunnier days, with around 4.3 mm (0.2 in) of rainfall over 2 rainy days. For more details, please visit our Piraeus Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Piraeus
For those who appreciate different seasons, Piraeus serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 12.1 hours of sunshine daily, and embrace the darker days in December, offering only 4.2 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Water Temperature in Piraeus
The mean water temperature over the year ranges from 14°C (57°F) in January to 24°C (75°F) in July.
Water temperature over the year
Humidity in Piraeus by Month
The relative humidity is high throughout the year in Piraeus.
The city experiences its highest humidity in November, reaching 73%. In July, the humidity drops to its lowest level at 43%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Piraeus
The mean wind speed varies between 1 m/s (2 knots) and 2 m/s (4 knots) throughout the year. It is lowest in April, May, June, September and November and highest during January, February, March, July, August, October and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Piraeus
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, September and October
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: June, July, August and September
- Best for swimming: June, July, August, September and October.
- Seasonal pattern: A distinct dry season from April to October, with very warm summers and mild winters
Frequently asked questions about the climate in Piraeus
What is the best time to visit Piraeus?
April, May, September and October typically offer the most optimal weather in Piraeus. In contrast, January, February, March, July, August and December tend to have less optimal conditions. Piraeus has a distinct dry season from April to October, with very warm summers and mild winters.
What temperatures can I expect in Piraeus?
Daytime highs range from 14°C (57°F) in January to 33°C (91°F) in July. Nighttime lows range from 7°C (45°F) to 23°C (73°F). Temperatures vary considerably through the year.
How much rain does Piraeus get?
Annual rainfall is around 399 mm (16 in). December is the wettest month with 65 mm (2.6 in), while August is the driest with 4.3 mm (0.2 in).
How sunny is Piraeus?
Piraeus receives around 2,773 hours of sunshine per year. July is the sunniest month with 364 hours, while December is the cloudiest with just 127 hours. Overall, Piraeus enjoys abundant sunshine.
Piraeus 3-Day Forecast
Piraeus on the map
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