September in Athens averages highs of 29 °C (83 °F) and lows of 19 °C (67 °F), with about 2 rainy days and 12 h 22 min of daylight. The sea is warm, around 26 °C (79 °F).
September weather in Athens at a glance
average high to low each dot ≈ 3 rainy days
Is September a good time to visit Athens?
Good time to go: hot and fairly dry. September is usually high season in Athens: book rooms early, as prices are typically at their highest.
Our rule: a month scores 2 points for comfortable average highs of 18–28 °C (1 point for 14–18 or 28–32 °C) and 2 points for 5 or fewer rainy days (1 point for 6–10). Average highs above 35 °C or below 8 °C make it a tough month whatever the rain. A rainy day here means 2 mm of rain or more. 4 points = great, 3 = good, 2 = mixed, 0–1 = tough.
Holidays and events in September 2026
No public holidays fall in September 2026 in Greece, so opening hours should be normal.
Things to do in Athens in September
September's weather suits a mix of outdoor sights and museums, so the open-air ones come first.
- Acropolis and the Parthenon — go at opening time outdoors
- Ancient Agora — Temple of Hephaestus outdoors
- Plaka and Anafiotika — island-style lanes outdoors
- Cape Sounion sunset — Temple of Poseidon, 70 km south outdoors
- Acropolis Museum — glass floors over excavations indoors
- National Archaeological Museum — Greece's greatest collection indoors
- Beach and swimming — the sea averages 26 °C (79 °F) in September. outdoors
Where to stay: Plaka or Koukaki under the Acropolis; Psyrri for nightlife; Kolonaki for upmarket.
What to pack for Athens in September
- Summer clothes, sunglasses and sunscreen.
- Swimwear.
- Comfortable walking shoes.
What a day in Athens costs
| Budget traveller | Mid-range | |
|---|---|---|
| Typical total per person, per day | €50–110 | €130–270 |
Excluding flights. September is usually high season in Athens: book rooms early, as prices are typically at their highest.
September in nearby cities
| City | High / low | Rainy days | Verdict |
|---|---|---|---|
| Santorini | 26° / 21° | 0 | Great time to go |
| Istanbul | 26° / 18° | 6 | Good time to go |
| Dubrovnik | 26° / 18° | 7 | Good time to go |
Plan your Athens trip
Want the whole trip planned? Join the Journey waitlist: tell it where, when and your budget, and it plans every day hour by hour.
FAQ
Is September a good time to visit Athens?
By the numbers, September is a good time to go: hot and fairly dry, with average highs of 29 °C (83 °F) and about 2 rainy days. September is usually high season in Athens: book rooms early, as prices are typically at their highest. The best months for weather are April, May, October.
How warm is Athens in September?
Average highs are 29 °C (83 °F) and lows 19 °C (67 °F) (2015–2024 averages). The sea is warm, around 26 °C (79 °F).
Does it rain a lot in Athens in September?
Expect about 2 days with 2 mm of rain or more, about 30 mm in total. It is the 3rd driest month of the year in Athens.
Sources: climate averages from Open-Meteo historical weather (ERA5 reanalysis, 2015–2024); sea temperatures from the Open-Meteo marine API (2023–2024); public holidays from Nager.Date. Daylight is calculated for the 15th of the month. Averages are a guide, not a forecast. Costs are typical ranges per person per day, excluding flights.