The best time to visit Greece, and the two things that close August
Late May to mid-June and September into October. Why the Acropolis shuts mid-afternoon in July, and the wind that cancels August ferries.
Photo · Pixabay · Pexels
Late May to mid-June, or September into early October. Warm sea, workable heat, full summer ferry timetables, and none of the two problems that make August in Greece harder than it looks in the photographs.
Those two problems are worth naming up front, because between them they decide more Greek itineraries than the temperature does.
The heat closes the sights. The wind closes the ferries.
Euro. Convert any figure on this page into your own currency at today's published rate.
Open the currency converter →The heat, and what it does to the Acropolis
Greece's summers have got hot enough that the country's most visited monument now shuts in the middle of the day during heatwaves.
The Culture Ministry closed the Acropolis from 1pm to 5pm on 8 July 2025, with 42 degrees forecast. It closed it again from 22 to 27 July 2025, along with the Ancient Agora, the Roman Agora, Hadrian's Library and the Olympieion. It had done the same in June 2024 ahead of a 43-degree day.
Here is the part that matters for planning, and it is the part every other page gets wrong. There is no published temperature threshold. The Ministry has never set one. The decision is taken day by day and announced that morning.
So you cannot plan around it. You can only avoid the month, or accept that on a July or August afternoon your Acropolis ticket may be for a site that is shut.
The Acropolis also runs a daily visitor cap and timed entry. In summer, slots go days to a couple of weeks ahead on the official ticketing site. Book the 8am opening: it is several degrees cooler than midday, the site is at its emptiest, and it is the one slot the heat rules will never take away from you.
The wind, and what it does to the ferries
The meltemi is a dry northerly that funnels down the Aegean. It blows from June to September and is at its strongest in July and August, when it routinely reaches 7 to 8 on the Beaufort scale and occasionally a good deal more.
It has two effects, and they pull in opposite directions.
It makes the heat bearable. An August afternoon on Naxos with the meltemi blowing is a great deal more pleasant than an August afternoon in Athens without it. It is also why the Cyclades are a world-class windsurfing destination.
And it cancels boats. Large conventional ferries mostly run through it, but the fast catamarans that most island-hopping itineraries depend on are the first things pulled, and when it reaches 8 Beaufort even the big ferries stop.
The national weather service publishes the marine forecast, and in July and August it is worth reading it the way you would read a departures board.
The practical consequence: an August island-hopping itinerary with tight connections is a plan with a hole in it. If you are hopping in high summer, build in slack days, prefer the large conventional ferries over the fast craft, and never schedule an island-to-airport transfer on the same day as your flight.
Season by season
Spring, April to early June
April is beautiful and the sea is cold. The countryside is green, the wildflowers are out, the sites are empty and the light is superb. Swimming is for the committed.
May is when it comes together, and by the last week of May the sea is swimmable and the islands have woken up. Late May to mid-June is the first of the two best windows.
Greek Orthodox Easter moves each year and is the country's biggest holiday. It fills domestic travel and it is also, if you are in a village for it, one of the best travel experiences in Europe.
Summer, late June to August
Hot, bright, expensive and busy. The sea is warm, the nightlife is at full volume, and the ferry network is at its densest.
It is also when the heat closes sites, the meltemi cancels boats, Santorini and Mykonos are at their most crowded and most expensive, and Athens is genuinely hard work in the afternoon.
If your dates are fixed here, the plan is: islands rather than Athens, west rather than east, early mornings, and slack in the schedule.
Autumn, September to October
The best sea of the year. The Aegean takes all summer to warm up and holds its heat well into October, so September swimming is better than June swimming by a clear margin.
September into early October is the other good window: heat easing, crowds thinning, ferries still on summer timetables, and prices coming down through the month.
Mid-October is the turn. Timetables thin, smaller islands start closing, and the weather becomes genuinely variable.
Winter, November to March
The islands are shut. That is not a figure of speech: on smaller islands most hotels and restaurants close, and ferries drop to a few sailings a week.
The mainland is open and underrated. Athens in winter is mild, cheap and almost empty at the sites. Thessaloniki has the best food in the country and a proper winter city life. There is skiing in the mountains, which surprises people. Crete, Rhodes and Corfu keep enough running to work year-round.
The month table
| Month | Weather | Sea | Islands | Verdict |
|---|---|---|---|---|
| Jan | Mild, wet | No | Mostly shut | Athens only |
| Feb | Mild, wet | No | Mostly shut | Athens only |
| Mar | Improving | No | Waking | Sites, not beaches |
| Apr | Lovely | Cold | Opening | Beautiful, no swimming |
| May | Warm | Warming | Open | Excellent from mid-month |
| Jun | Hot | Good | Full | Very good to mid-month |
| Jul | Very hot | Warm | Full, windy | Heat closures, meltemi |
| Aug | Very hot | Warm | Peak, windiest | The hardest month |
| Sep | Warm | Warmest | Full | The best month |
| Oct | Mild | Still warm | Thinning after the 15th | Very good early |
| Nov | Cool, wet | No | Closing | Mainland only |
| Dec | Cool, wet | No | Shut | Athens and Thessaloniki |
One catalogue note, said plainly: the shelf above is Athens, which is our destination for Greece along with Thessaloniki. Santorini, Mykonos, Crete, Rhodes and Corfu are not in our catalogue, so we cannot show you rooms on the islands themselves. The timing advice on this page applies to them regardless, and we would rather say what we cannot do than quietly show you a shelf for the wrong place.
What to skip
Santorini in August. The most crowded, most expensive and windiest version of an island that is genuinely lovely in May and October.
A tight August island-hopping chain. See the meltemi. Two islands with slack beats four with none.
An afternoon Acropolis ticket in July. Either it is 38 degrees on bare marble with no shade, or the site is closed. Take the 8am slot.
Flying home the same day you leave an island in high summer. The one scheduling decision most likely to cost you a flight.
Assuming the islands are open in April. Many are still shuttered until around Orthodox Easter.
Short tourist stays only. Checked 21 Aug 2026; rules change without notice and the government page is the source of truth.
Check your own passport →Checked 21 Aug 2026.
Everything we check for Greece →Before you book
The Athens city guide has the neighbourhoods and the Greece country guide the practicalities. For the same months in the neighbouring country, Italy has its own August problem and a very different one, and Morocco is the warm-in-winter alternative when the Greek islands shut. Yasmine's Istanbul where-to-stay guide covers the other end of the eastern Mediterranean. The when to go hub has every other country we cover, and the month pages show what September looks like across the catalogue. Ready to look at rooms? Athens stays are here, and the things to do shelf has the bookable half.
Heat closures, the meltemi season and ferry patterns checked September 2026. The Culture Ministry has never published a temperature threshold for closing sites and announces closures on the morning, which is why this page treats July and August as a month to avoid rather than a risk to manage. Here is how we research and re-check guides.
