Santorini weather in September
September is a good time to visit Santorini as it’s less crowded but still has beautiful if slightly cooler weather.
You can expect warm, sunny days with little or no rain.
How hot is it in Santorini in September?
Daytime temperatures usually reach 26°C (79°F) in Santorini in September with moderate to low heat and humidity, falling to 21°C (69°F) at night.
However, on the warmest days of the month, which normally occur at the beginning of the month, the temperature may reach a high of around 31°C (87°F).
How sunny is it in Santorini in September?
There are normally 9.5 hours of bright sunshine each day in Santorini in September – that's around 77% of daylight hours.
Sunrise & sunset in September?
Sunrise is around 7am with sunset around 7:25pm.
How warm is the sea around Santorini in September?
The average sea temperature around Santorini in September is 24°C (75°F), which is warm enough for swimming.
Does it rain in Santorini in September?
There is usually one day with some rainfall in Santorini in September, with an average of 15mm (‹1in) of rainfall.
How windy is it in Santorini in September?
September sees an average wind speed of 21km/h (11 knots; 13 mph). The predominant wind direction is from the north.
What to do in Santorini in September?
Weather conditions in September are still good for sunbathing, swimming, snorkelling and scuba diving.
Away from the beach, this is also a good time to explore the island on foot, bicycle or motorcycle. Don't miss the preserved ruins of classical antiquity at Ancient Thera and the nearby Minoan Bronze Age settlement of Akrotiri or the narrow picture-perfect alleyways of Firá and Oía.
September is regarded as the shoulder season in Santorini, and while hotel rates haven’t dropped the beaches and entertainment venues are certainly less crowded.
Local holidays?
None.
Santorini weather in September
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High Temp: 26°C (79°F) |
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Low Temp: 21°C (69°F) |
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Sunshine: 9.5 hours per day |
12
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Daylight: 12 hours per day |
 |
Wind speed: 21 km/h (11 knots; 13 mph) |
 |
Wet Days: 1 day with some rain |
 |
Rainfall: 15mm (‹1in) per month |
 |
Comfort Level: Moderate to low heat & 65% humidity |
7
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UV Index: High |
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Sea Temp: 24°C (75°F) |
| Santorini, Greece | |
Best time to visit Santorini
The best time to visit Santorini is during mid-season (May, June, September and October) when the weather is warm and the island is less crowded. The peak season of July and August is beautiful with hot, sunny weather but comes at a cost of sky-rocketing prices in hotels and restaurants.
Santorini weather by month
Climate source: Weather data for Santorini is based on meteorological statistics gathered for the 30-year period 1991 to 2020 by the Hellenic National Meteorological Service (HNMS) at the closest weather station: Santorini (Thira) International Airport (JTR), located about 5km (3mi) southeast of the capital, Fira.
Advice on the best time to visit Santorini is based on average local weather statistics, when the weather conditions are generally better than at other times of the year. We consider high and low temperatures, risk of rain (and thunderstorms, etc.), amount of sunshine and sea temperature. For general outdoor activities we favour clear, rainless days with a temperature range between 18°C (64°F) and 27°C (80°F); and for hot-weather activities we favour clear, rainless days with a temperature range between 24°C (75°F) and 32°C (89°F). Often, the best times to visit correspond to high season and therefore involve higher prices.
Latest update: Santorini weather in September: 27 April, 2025
Disclaimer: The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data and conditions at any given location and time are unpredictable and variable. We assume no responsibility and can not be held legally responsible for any decisions made on the basis of the information presented on this site.
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