Quick answer: The best time to visit Santorini is late April to early June and September to October — warm, swimmable and far less crowded than the July–August peak. Summers are hot and dry; winters are mild, wet and very quiet, with many businesses closed.
Santorini weather by month
| Month | Avg high | Conditions |
|---|---|---|
| January | ~13°C | Mild, wet, quiet |
| February | ~14°C | Mild, wet |
| March | ~16°C | Spring begins |
| April | ~19°C | Pleasant, greening |
| May | ~23°C | Warm, ideal |
| June | ~27°C | Hot, sunny, busy |
| July | ~29°C | Hot, peak crowds |
| August | ~29°C | Hot, peak crowds |
| September | ~26°C | Warm, ideal |
| October | ~22°C | Mild, quieter |
| November | ~18°C | Cooler, wetter |
| December | ~14°C | Mild, wet, quiet |
Seasons explained
Summer (Jun–Aug) is hot, rain-free and busiest, with the famous sunsets and full nightlife. Spring and autumn are the sweet spots for comfortable sightseeing and swimming. Winter is mild but wet, and Oia in particular goes quiet as hotels and restaurants close.
What to pack
Sun protection and light clothes for summer; add a light jacket for spring and autumn evenings; bring a proper coat and umbrella in winter. Comfortable shoes everywhere — Santorini is steep and cobbled.
The Real Best Time: Why Late September Beats Peak Summer
Peak season runs July and August, and that is exactly the stretch to skip unless you have no choice. Highs sit around 28 to 30C, the northerly meltemi wind blows hardest from July into August (regularly choppy enough to cancel caldera boat tours and catamaran trips), and the best caldera-view hotels routinely sell out six months ahead at the year’s top rates. You pay the most for the most crowded, windiest version of the island.
The smarter window is the shoulder season, and the two halves are not equal:
- May gives the lowest prices and lightest crowds, but the sea is still cool at around 18 to 21C, so it suits walkers more than swimmers.
- Late September is the sweet spot: the sea peaks near 24C (the warmest swimming of any shoulder month), crowds and room rates start dropping after the first week, and the Ifestia volcano festival lights up fireworks over the caldera on the third Saturday.
October keeps a swimmable sea around 21 to 23C as the island quiets further. If a specific event anchors your trip, the Santorini Jazz Festival lands in July in Kamari. For everyone else, aim for the back half of September.
FAQ
What is the best month to visit Santorini? May, June, September or early October.
Is Santorini good in winter? It’s peaceful and cheap but wet, with many closures.
Compare with our Greece vs Croatia guide and best time to visit Greece.
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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.