Kalamaki weather by month

When to go to Kalamaki

For beach weather, look at months where the daytime average clears 25°C and rainy days stay low: June, July, August, September. December is the wettest month (61 mm, about 8 rainy days) and August the driest (4 mm). The sea is warmest in August at 26.2°C and coolest in February at 14.4°C.

Getting there

A direct flight from London Gatwick to Athens Eleftherios Venizelos International Airport (ATH, 20 km from Álimos) takes roughly 3 h 42 min - short-haul (up to 4.5 h) by UK standards. Time-zone: Europe/Athens.

Records and extremes, 1991-2020

The hottest day recorded in Kalamaki between 1991 and 2020 reached 43.1°C on 26 June 2007; the coldest fell to -6.3°C on 24 January 2004. In July one day in ten tops 35.5°C and about 85% of days pass 30°C; in January one night in ten drops to 3.3°C or below. The wettest single month of the period was March 1998 with 201 mm, against a March average of 49 mm.

Spring: comfortable days, but the sea takes time to warm

March is still a layers-and-jacket month, with daytime averages of 16°C and nights around 9°C. It suits being outdoors without summer heat, but not relying on warm evenings. April brings a clearer shift towards holiday weather: days average 20°C, with 8 hours of sunshine, though the sea at 16°C will feel cold to many swimmers. May is the stronger choice for warmth without peak-summer temperatures. Days reach 25°C on average, making light daytime clothing useful, while an extra layer still earns its place after sunset. The catch is the sea: at 19°C, it remains much cooler than in early autumn.

Summer: reliable warmth, with a midday heat trade-off

June offers a useful balance if swimming and sunshine matter most. The sea averages 23°C, rain falls on around 2 days, and daytime temperatures are lower than in July and August. Those peak-summer months both average 32°C by day and 23°C at night, so do not count on evenings feeling cool. Plan more active time for the morning or later afternoon, leaving room for shade at midday. July has the most sunshine, averaging 13 hours daily, while August has the warmest sea at 26°C. Light clothing and sun protection are priorities; this season is less suitable if heat makes sightseeing or sleeping uncomfortable.

Autumn and winter: lingering sea warmth, then cooler, wetter days

September keeps much of summer's swimming appeal without its strongest daytime heat: the sea averages 25°C and evenings remain warm. October is a reasonable compromise for travellers happy to mix swimming with other outdoor time, with both daytime and sea temperatures averaging 23°C. Bring a layer for evenings and allow for showers. November feels more transitional: days average 18°C, but nights at 12°C make warmer clothing useful. December brings the wettest conditions, so waterproofs matter more than swimwear. January is the coolest month, with days around 12°C, while February only edges up to 13°C. Both have nights around 7°C. Winter suits travellers content with mild daytime spells and flexible plans, rather than dependable warmth.