Can I swim in Santorini in September?

Late September temperatures in Santorini are still pleasant, with averages around 24°C (75°F), making it ideal for outdoor sports and sightseeing. The weather is sunny and clear, and the sea is still warm enough for swimming.



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More of the same glorious summer weather continues throughout September, although the odd day of rain is not unheard of. The balmy climate, somewhat decreased visitor numbers, and abundance of festivals make this month an excellent choice for a visit.

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GREECE. Greece is home to some of the best swimming waters in all of Europe, and September is a great month to visit, with the weather and sea temperatures as perfect as can be (26.8°C/80.2°F).

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However, swimming in the clear blue water of Santorini is wonderfully refreshing. Since the beaches have coarse sand, there's little dust to cloud the water. Don't come to Santorini primarily for the beaches – come for the volcano boat tours, incredible views, wine, hikes, nightlife, and great food.

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Red Beach – the most beautiful Santorini beach for swimming amidst the beauty of nature; Amoudi is known for its clean and peaceful environment. It is the perfect place to enjoy the sunset and delicious fish in local restaurants; Vlychada – famous for its wild nature and crystal clear water.

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The graph below shows the range of monthly Santorini water temperature derived from many years of historical sea surface temperature data. The warmest water temperature is in August with an average around 77.2°F / 25.1°C. The coldest month is March with an average water temperature of 61.7°F / 16.5°C.

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And, yes, you can also swim in Santorini in October. In fact, the sea is sometimes even warmer than in June! Plus, you get a little extra when visiting the island's shores as October is a low-tourism month. This means that you will probably have a large part of any beach all for yourself.

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The water is still swimmable in early October as long as the wind isn't too strong. Because the sun is low in the sky the water doesn't have a chance to get hot, but when I was on Santorini in October I was still swimming every day. If you want special couples treatment you have to pay for it.

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Santorini in September (85% Crowded): Hot and sunny but cooling a little from August. The weather is similar to June but the water temperature is warmer as it heats over the summer months. Winds have died down. September is the best month to visit Santorini.

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Which islands will be hottest?
  • Kos. Average temperature in September: 28ºC. ...
  • Crete. Average temperature in September: 27ºC. ...
  • Cyprus. Average temperature in September: 31ºC. ...
  • Corfu. Average temperature in September: 27ºC. ...
  • Samos. Average temperature in September: 29ºC. ...
  • Santorini. Average temperature in September: 25ºC. ...
  • Halkidiki.


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The weather in Greece in September is hot and sunny skies can be found in all Aegean and Ionian islands, with the temperatures boasting an average high of a balmy 82 degrees Fahrenheit and an average snowfall of zero. Despite the sun shining down relentlessly, showers are never too far away.

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Be warned that while early September will see all visitor facilities in full swing, but the latter part of the month may see hotels and restaurants reduce opening hours (or shut down completely).

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There are few downsides, but one is that the Meltemi, a wind from the north that blows persistently for up to several days at a time and is liable to make the air feel cooler, can still affect your plans in September.

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Well, here's the good news. Yes, you can swim and safely sit in the sun until early December. There are some tips of course and best beaches where the waters tend to be warmer late into the year.

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There is a 70% chance of a perfect sunny day and a 30% chance of seeing some clouds, with on average 4mm of rainfall this month.

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The sea temperature is still warm in October and most days are sunny. Most businesses are open, despite the fewer crowds and, sure enough, you can find great deals in this off-season. The best time to visit Mykonos is October when the crowds have diminished, the water remains warm and rates fall.

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This glorious blue colour is due partly to the reflection of the blue skies and partly to the fact that the sea does not contain large quantities of solid matter such as plankton, mud and dust floating in the water. The way in which the Greek Sea sparkles is like no other the world over.

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Santorini's main resort town of Kamari has a long stretch of brown sand and clear, calm water that says “jump in!” Food, drink and music are never far as the sands are lined with cafes, bars and clubs. Renting a lounger for the day is easy and you can try a variety of water sports, many of which are geared to families.

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5 Kamari Beach On the Greek island of Santorini's southeast coast is Kamari Beach, a well-liked vacation spot known for its clean waters and dark volcanic sand. The beach is simply reachable by vehicle or bus and is located 5 kilometers southeast of Fira, Santorini's city.

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