Quick answer: The best time to visit Greece is May, June, September, October. The peak season is July–August (hottest, busiest, priciest), and the months most worth avoiding are December–February (cool, wet, many islands shut).
Greece has a classic Mediterranean climate: hot, dry summers and mild, wetter winters. July and August are the hottest and busiest months, while the shoulder seasons (May–June and September–October) deliver warm weather, a warm sea and far smaller crowds.
Greece Weather by Month (Temperatures & What to Expect)
| Month | Avg High | Avg Low | Rain/Snow | Crowds | Verdict |
|---|---|---|---|---|---|
| January | 13°C / 55°F | 6°C / 43°F | Wet | Low | Avoid — Cool and wet; mainland focus, most islands quiet. |
| February | 14°C / 57°F | 6°C / 43°F | Wet | Low | Avoid — Still cool and changeable; almonds blossom. |
| March | 16°C / 61°F | 8°C / 46°F | Light | Low | Shoulder — Spring begins; mild, green, very quiet. |
| April | 20°C / 68°F | 10°C / 50°F | Light | Med | Good — Warm, blooming, Easter buzz; sea still cool. |
| May | 25°C / 77°F | 14°C / 57°F | Dry | Med | Great — Warm, dry, fewer crowds — superb shoulder month. |
| June | 29°C / 84°F | 18°C / 64°F | Dry | High | Great — Hot, dry, long days; sea warming nicely. |
| July | 33°C / 91°F | 22°C / 72°F | Dry | High | Best — Peak heat and crowds; meltemi winds in the Cyclades. |
| August | 33°C / 91°F | 22°C / 72°F | Dry | High | Best — Hottest, busiest, priciest — book well ahead. |
| September | 29°C / 84°F | 19°C / 66°F | Dry | High | Best — Warm sea, hot days, easing crowds — the sweet spot. |
| October | 24°C / 75°F | 15°C / 59°F | Light | Med | Great — Pleasantly warm; sea still swimmable early month. |
| November | 19°C / 66°F | 12°C / 54°F | Wet | Low | Shoulder — Cooling, first rains; islands winding down. |
| December | 15°C / 59°F | 8°C / 46°F | Wet | Low | Avoid — Cool, wet, festive in Athens; islands quiet. |
Best Time to Visit Greece
If your priority is the best balance of weather, value and manageable crowds, target May, June, September, October. The table above breaks down every month so you can match the season to your trip.
Greece Weather in July
July is high summer in Greece: reliably hot (33°C / 91°F), bone dry and sunny, with a warm sea. It is also the busiest and most expensive month, and the Cyclades (Mykonos, Santorini, Naxos) get the strong meltemi wind. Book ferries and hotels early.
Greece Weather in September
September is many travellers’ favourite month: the sea is at its warmest after a summer of sun, days are hot but not scorching (29°C / 84°F), and the July–August crowds have thinned. Prices ease from mid-month.
Which Shoulder Season to Pick (and the Peak-Summer Catch Nobody Warns You About)
The honest call is not just ‘May or September’ but which shoulder fits your trip. Pick September if swimming is the point: the Aegean sits around 23-24C after a summer of warming, roughly 3C warmer than October, so the sea stays comfortable while flight and room rates have already softened from the August peak. Pick late May or early June if you want green hillsides, wildflowers, and long daylight before the heat clamps down, though the water is still cool enough that some travelers skip long swims.
Peak summer has a catch the brochures skip past: the meltemi, a dry northerly wind that blows hardest in July and August across the Cyclades. On islands like Mykonos and Paros it can push high-speed catamarans and small-island ferries out of service when it reaches around force 8, so a tight August island-hopping plan can unravel in a day. Inland Athens can also touch close to 40C in a heatwave.
- Worth timing for: the Athens Epidaurus Festival, running about June 20 to late August in 2026, with ancient drama staged at the Theatre of Epidaurus.
- Worth avoiding: December through February, when many island hotels, tavernas, and ferry routes simply shut down.
Frequently Asked Questions
When is the best time to visit Greece?
May–June and September–October — warm, dry weather with a warm sea and far smaller crowds than the July–August peak.
Is the sea warm enough to swim in Greece?
Yes from June to October. The water is warmest in August and September after the long summer; May is swimmable but cooler.
Is July too hot for Greece?
July is hot (33°C) but dry and very manageable on the coast with sea breezes. Inland sites like Athens and Delphi feel hotter — visit ruins early morning.
Are the Greek islands open in winter?
Many smaller islands largely shut down November–March. Athens, Crete and Rhodes stay active year-round.
Looking for a recommendation, not just data? See our best time to visit Greece guide.
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Written by
John Morrison is the founder and lead travel writer at Packzup. Over the past decade he has explored destinations across Africa, the Americas, Asia, Europe, the Middle East, and Oceania — always self-funded, never on a press trip.