Santorini weather

Our guide to the weather in Santorini during September

24

Average high

6

UV Index

17mm

Monthly rainfall

24

Sea temperature

Santorini is a stunning Greek island with picturesque views and plenty of cultural experiences to explore. September is a great time to visit, with mild temperatures and fewer crowds. We've looked at the most up-to-date weather data for Santorini, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Santorini weather in September.

What's the weather like in Santorini in September?

Conversant Traveller September is a wonderful time to visit Santorini, with the warmth of the summer lingering through to November. This is most definitely beach weather, so don’t forget the sunscreen. Days are mild, with average temperatures reaching highs of 26˚C and lows of 19˚C. Meanwhile, evenings are cooler but still balmy, with night-time temperatures rarely dropping below 17˚C. The sea is often at its warmest in September too, since it’s had all summer to heat up. So, if you fancy going swimming in the Aegean, or sunbathing on the volcanic beaches, this is the time to do it. Answered by Conversant Traveller

What should I pack for a holiday in Santorini in September?

Conversant Traveller The great weather in Santorini at this time of year means that this will feel like a summer holiday. So, pack loose-fitting, light clothing to cope with the soaring daytime temperatures. Ladies should take sun dresses, shorts and kaftans for exploring the caldera villages and lounging on the beach. For men, shorts and shirts will do the trick wherever you go on the island. Sunhats and sunglasses are also an essential part of your holiday wardrobe for Santorini. If you plan on hiking on any of the island trails, then comfortable outdoor footwear is a must as the terrain is often uneven. Remember to pack a jumper or light jacket for potentially cooler evenings. Answered by Conversant Traveller

What's great about Santorini in September?

Conversant Traveller September is one of the best months of the year to visit Santorini. The island is less crowded than it is during July and August, plus the weather is still very warm and pleasant for sightseeing. Hotel prices can be cheaper during September too, which makes visiting this glamorous island a more affordable prospect. As Santorini sees fewer tourists this month, it means that booking tours and making restaurant reservations doesn’t need to be done months in advance. It’s definitely easier to be spontaneous in September than it is in the height of the summer. Answered by Conversant Traveller

How warm is it in Santorini during September?

The temperature is extremely stable in September with average highs of 24℃ and lows just 1℃ lower at 24℃. Of course, the high humidity will make it feel even hotter. The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.

Does it rain in Santorini during September?

On average, in September you'll see rain on just one day in the month. In other words, you shouldn't see any of the wet stuff. There's a small chance that you'll catch a thunderstorm during your trip.

Is it windy in Santorini during September?

Expect moderate breeze becoming stronger at times during September, with occasional gusts up to 20mph. The high humidity and warm temperature will make the breeze feel warm, so any cooling effect will be limted.

How warm is the sea in Santorini during September?

The water temperature around Santorini reaches a pleasant 24℃ during September. While generally considered warm, some people might find it a little on the cool side on entering the water.

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Santorini is a Greek island that was created by volcanic eruptions hundreds of years ago. Today the island is a whitewashed paradise that offers visitors some of the most iconic images of Greece. If you are planning a trip to Santorini, Greece, be sure to check out the ultimate Santorini Travel Guide. You can also read about my ultimate self-guided ATV adventure around Santorini and my guide for what to wear in Santorini....

Weather in Santorini

Our month-by-month guide to the weather and climate in Santorini

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January
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February
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March
17.0

Santorini weather in

April
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May
23.4

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June
25.4

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July
25.9

Santorini weather in

August
24.4

Santorini weather in

September
21.6

Santorini weather in

October
19.0

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November
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December