
Month by month
Greece in September
The best month of the year for most trips: sea still at its warmest, heat easing, crowds thinning after the first week.
September keeps what August built — a sea of around 24–27°C — and loses much of what made August hard. Athens drops to an average high of about 28°C, families have gone home after the first week, and prices ease through the month. The meltemi usually fades from mid-September.
This is the month for the islands that are hardest in summer: Santorini's caldera walk without the midday heat, Milos and Folegandros, the long beaches of Rhodes and Crete. Site hours start to shorten — the Acropolis closes at 19:00 from 16 September — and the last weekend brings free admission at state sites.
Temperatures by region
Athens & the Riviera- 28.3° / 19.6°
- Sea: ~25°C
- Athens (coastal station)
Cyclades- 25.1° / 20.1°
- Sea: ~24°C
- Naxos, standing in for the Cyclades (sea: Santorini)
Crete- 26.6° / 19.5°
- Sea: ~25°C
- Heraklion
Ionian islands- 27.5° / 16.8°
- Sea: ~25°C
- Corfu
Dodecanese- 28.1° / 21°
- Sea: ~27°C
- Rhodes
Northern Greece- 27.1° / 15.4°
- Sea: ~25°C
- Thessaloniki (sea: Thessaloniki/Halkidiki)
Air: HNMS climate normals 1955–2010, mean daily maximum and minimum. The Cyclades use Naxos as their reference station. Sea (June–October only): approximate monthly averages from seatemperature.org monthly averages (approximate). Source: Hellenic National Meteorological Service (HNMS) climate normals
Where to go this month

The rim of a flooded volcano, with cliff-top villages above the caldera, Bronze Age Akrotiri, black-sand beaches and Assyrtiko vineyards. Spectacular and crowded: go in late spring or September and choose your base with care.

Milos is the Cyclades’ volcanic sculpture park: white lunar rock at Sarakiniko, the sea caves of Kleftiko, painted boathouses at Klima and dozens of beaches, with good tavernas and far less swagger than Mykonos or Santorini.

A small, steep Cycladic island with one of the most striking clifftop villages in the Aegean, a handful of beaches reached on foot or by boat, and few ferries. Come for walking, long dinners in Chora and genuine quiet.

Sifnos is the Cyclades’ table: clay-pot revithada, potters’ workshops, a medieval Kastro above the sea and whitewashed chapels on every headland, linked by walking paths and served by ferries rather than planes. Gentle, grown-up and busiest in August.

Rhodes pairs a walled medieval town built by the Knights of St John with Lindos, a sheltered sandy east coast and a wild, windy west. Big, easy to reach and good in the shoulder seasons, it rewards travellers who rent a car.

Greece’s largest island is almost a country of its own: Minoan palaces at Knossos and Phaistos, Venetian harbours in Chania and Rethymno, gorges in the White Mountains and lagoon beaches like Balos and Elafonisi. Plan for distance, and for more than a week.
What is on, what is shut
- Last weekend of September: free admission at the Acropolis, Knossos, Mystras and other state sites.
- Acropolis hours 08:00–19:00 from 16 to 30 September.
- The Armata festival on Spetses takes place in September — dates are set locally each year, so check before you book.
In the events calendar

Free admission at state sites (last weekend of September)
26 September 2026 – 27 September 2026 · State archaeological sites and museums

Armata festival, Spetses
≈ 1 September 2027 – 30 September 2027 · Spetses
Where to stay · Santorini
Live prices and availability on a map centred on this exact spot — hotels, studios and villas — so you can judge the distance to the beach, the port or the village from here rather than guess from an address.
Bookings made through this map earn us a commission. Your price is unaffected.
Partner links · GetYourGuide
Tours, boat trips & tickets
Boat trips, guided tours of the ancient sites and tickets bookable ahead — free cancellation on most.
- Caldera sunset catamaranUnder the caldera cliffs to the volcanic islets and swim stops, with the sunset seen from the water rather than from a packed wall in Oia.See boat trips →
- Volcano & hot springsWalk the crater on Nea Kameni, then swim to the warm, rust-coloured springs off Palea Kameni. Wear shoes you do not mind ruining.See guided tours →
- Santorini wine tourAssyrtiko from vines trained low into baskets against the wind. Two or three wineries with a driver — which is the whole point.See wine tastings →
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Read next
Questions about this month
What is the weather like in Greece in September?
Athens averages a high of 28.3°C and a low of 19.6°C; the Cyclades (Naxos) 25.1°C / 20.1°C — HNMS normals 1955–2010. The sea around Crete averages about 25°C.
Is September a good time to visit Greece?
The best month of the year for most trips: sea still at its warmest, heat easing, crowds thinning after the first week.
Where should I go in Greece in September?
Our picks for September: Santorini, Milos, Folegandros. Crowds are busy and prices high for the Greek year.
Before you go
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