The best time to visit Santorini is May to June and September to October, when the weather is warm and sunny, the sea swimmable and the crowds far thinner than the July and August peak. September is many travellers’ top choice. This guide covers the seasons month by month, the crowds, the winds and when to go.
Choosing the right time shapes the whole trip, a key step in the wider Santorini travel guide. The island’s summers are hot, dry and busy. The sections below cover the seasons.
When is the overall best time?
The overall best time is May to June and September to October, when the weather is warm, the sea swimmable and both crowds and prices below the midsummer peak. Mid to late September is the consensus best, keeping summer warmth as the crowds thin and prices fall.
The shoulder months offer the finest balance on Santorini. Late spring, from May into June, brings warm, sunny days, blooming hillsides and a sea warming to swimmable temperatures, with everything open as the season builds. Early autumn, September into October, keeps summer-like warmth and a sea still warm from the long summer, but with noticeably thinner crowds after the first week of September and falling prices, which is why mid to late September is so often named the best time of all. Both seasons avoid the intense heat, crush and high costs of midsummer while keeping the island fully alive, set out alongside the guide to things to do in Santorini. Each season has its own character.
What is spring like, April to May?
Spring, from April to May, is mild and green, with temperatures climbing from the high teens to the mid-20s Celsius, wildflowers on the hills and quiet streets. It is ideal for sightseeing, hiking and the villages, though the sea is still cool early on and warms by late May.
Spring is Santorini at its calmest and freshest. After the winter rains, the hillsides are green and dotted with wildflowers, and daytime temperatures rise from the high teens in April to the mid-20s Celsius by May, comfortable for exploring. The villages, the caldera path and Akrotiri are a pleasure without the summer crowds or heat, and prices are lower. The main caveat is the sea, still cool for swimming in April and warming to a swimmable 20 to 22 degrees only by late May or June. For sightseeing, hiking and photography in peace, spring is excellent, set out alongside the guide to the Santorini sunset. Summer brings the heat and the crowds.
What is summer like, June to August?
Summer is hot, dry and sunny, with highs around the high 20s in June rising to 30 degrees or more in July and August, and warm, calm seas. It is peak season for beaches and cruises, but the island is at its busiest, hottest and most expensive, with Oia at sunset shoulder to shoulder.
Summer is the peak, bright and lively but intense. June already brings warm, settled weather in the high 20s and the start of the beach season, while July and August are the hottest months, regularly reaching 30 degrees or more, with reliably sunny days and warm, swimmable seas. This is prime time for the black-sand beaches, caldera cruises and watersports, but also the busiest and priciest, with Oia and Fira crowded, accommodation at its dearest and the Oia sunset packed an hour or more ahead. The cooling meltemi wind can pick up, occasionally affecting ferries, so booking everything well ahead is essential, set out alongside the guide to where to stay in Santorini. Autumn keeps the warmth with calm.
What is autumn and winter like?
Autumn stays warm into October, ideal for swimming and sightseeing as crowds and prices drop, before cooling in November. Winter, from November to March, is mild but cool and the rainiest season, with the sea too cold to swim and some hotels, restaurants and attractions closed.
The year winds down gently before the quiet of winter. September still feels like summer, warm with a sea kept warm from the heat, and October remains pleasant for swimming early on and excellent for sightseeing as the island empties and prices fall, making early autumn many travellers’ favourite. From November the weather cools and the rains arrive, and through winter, from November to March, temperatures sit around 10 to 14 degrees, the sea is too cold to swim and a number of hotels, restaurants and attractions close, though the island is mild compared with northern Europe and almost crowd-free, set out alongside the guide to a Santorini itinerary. The crowds and winds are worth understanding.
How busy is Santorini, and what is the meltemi?
Santorini is busiest in July and August, when it is around 95 to 100 per cent full, easing to about 85 per cent in September and 80 in June. The meltemi is a strong, dry north wind blowing mainly in July and August, which cools the heat but can disrupt ferries and exposed beaches.
Crowds and wind both peak in high summer. The island is at its absolute busiest in August, essentially full, with July close behind, before easing to around 85 per cent in September as the heat softens and 80 per cent in June at the start of beach season. The other midsummer factor is the meltemi, a strong, dry northerly wind that blows mainly in July and August; it brings welcome relief from the heat and clear skies, but can whip up the sea, occasionally delaying or cancelling ferries and making the exposed east-coast beaches choppy. Travelling in the shoulder months sidesteps both extremes, set out alongside the guide to how to get to Santorini. The questions below cover the points travellers ask most.
Frequently Asked Questions
What is the best month to visit Santorini?
September is widely considered the best month to visit Santorini, keeping summer warmth and a swimmable sea while the crowds thin and prices fall. May, June and early October are also excellent, with warm weather and far fewer people than the July and August peak.
When is Santorini least crowded?
Santorini is least crowded in spring, from April to May, and in late autumn from mid-October, outside the peak. The shoulder months of May, June and September offer pleasant weather with manageable crowds, while July and August are the busiest and most expensive.
What is the meltemi wind in Santorini?
The meltemi is a strong, dry north wind that blows mainly in July and August. It cools the summer heat and clears the skies, but can whip up the sea, occasionally delaying or cancelling ferries and making the exposed east-coast beaches choppy on windy days.