Weather in Athens

Weather - Athens, Greece

Athens enjoys a classic Mediterranean climate: hot, dry summers and mild, wetter winters. This guide breaks down what to expect month by month — temperatures, sunshine, rainfall and sea conditions — so you can pick the best time to visit, plan beach days or avoid the heat. Flightics tip: shoulder seasons (April–June, September–October) balance warm weather with fewer crowds and great value on flights.

Athens weather - January

January is one of the coldest months by Athens standards but still mild compared with northern Europe: average highs around 13°C and lows near 6°C. Expect about 10 rainy days and limited sunshine, so bring a light rain jacket for sightseeing. Sea temperatures are around 15°C — too cool for most swimmers but workable for brisk walks along the waterfront.

Athens weather - February

February stays close to January in temperature (highs ~14°C, lows ~6°C) with similar rainfall and a bit more daylight. Sunny spells increase slightly, making it a decent month for cultural visits and lower airfare deals. Sea temperatures remain cool (~14°C), so swimming is generally off-season.

Athens weather - March

March marks the real turn toward spring: highs near 16°C and lows around 8°C, with more frequent sunny days. Rainfall diminishes compared with winter, and daily daylight grows — ideal for exploring archaeological sites before the summer crowds. The sea is still cool (~14°C), but outdoor cafés and terraces start to feel comfortable.

Athens weather - April

April is a popular shoulder-month for visiting Athens: averages of about 21°C by day and 11°C at night, plus more sunshine and fewer rainy days. Mild, pleasant weather is excellent for walking the city and nearby coastal spots; sea temps (~15°C) are warming but still brisk for swimming. This month often delivers reliable spring colors and comfortable conditions for sightseeing.

Athens weather - May

May brings reliably warm weather — highs around 26°C and lows near 15°C — with long sunny days and minimal rain. Sea temperatures rise to about 18°C, making late-May a good time for braver swimmers and beach outings. If you want warm weather without peak-summer crowds (and competitive flight prices), May is a strong choice.

Athens weather - June

June marks the start of true summer: average highs near 31°C and nights around 20°C, with lots of sunshine and very little rain. Sea temperatures climb to ~22°C, ideal for comfortable swimming and water sports. Expect dry, hot days — pack sun protection and plan outdoor activities for mornings or evenings to avoid the hottest hours.

Athens weather - July

July is the hottest month, with average highs around 34°C and warm nights (~23°C). Rain is rare and sunshine abundant, making it peak season for beaches and island hopping — but also the busiest and hottest time for city sightseeing. Sea temperatures near 25°C are perfect for long swims; stay hydrated and favor early starts when exploring Athens’s outdoor attractions.

Athens weather - August

August remains very hot (highs ~33°C, lows ~23°C) with minimal precipitation and long sunny days. It’s a top month for swimming — sea temperatures reach about 26°C — and for beach life on the Attica coast and nearby islands. If visiting the city, schedule museum visits and Acropolis trips for early morning or late afternoon to escape the peak heat.

Athens weather - September

September is an excellent shoulder month: still warm (highs ~29°C, lows ~19°C) with comfortable sea temps around 25°C and fewer tourists. It blends summer beach conditions with more pleasant temperatures for sightseeing, making it one of the best months to visit Athens for both culture and swimming.

Athens weather - October

October cools to averages of about 24°C daytime and 15°C at night, with an uptick in rainfall compared to summer. Sea temperatures stay pleasant (~22°C), so early October can still be suitable for swimming. The combination of milder weather and thinning crowds makes October attractive for city breaks and late-season beach days.

Athens weather - November

November moves toward late autumn: highs around 19°C and lows near 11°C, with increased cloudiness and more rainy days. Outdoor activities remain possible on drier spells, but the sea (about 20°C) is cooling and less inviting for most swimmers. This month can be good for lower-price travel and quieter cultural visits.

Athens weather - December

December is cool and one of the wettest months, averaging highs near 14°C and lows around 8°C with roughly 11 precipitation days. Sunshine is limited compared with summer, but the mild temperatures still allow comfortable city exploration with the right layers. Sea temperature drops to about 17°C — generally too cold for swimming for most visitors.

Table of average MIN/MAX temperatures throughout the year