September in Greece: Weather, What to Pack, and What to See

View of the ocean from Santorini

TripSavvy / Monica Farber

September travel to Greece provides visitors with the best of all worlds—lighter crowds, lower prices, pleasant weather, and a full slate of events and attractions. In September, you can enjoy music festivals, picturesque religious feast day celebrations, and the Athens International Film festival.

Most tourists will find attractions open toward the last part of the month less crowded—a few places on the Greek islands will close at the end of the month, and activities for children start to wane as the school year begins. Transportation schedules start to be cut back about September 15.

September is also the beginning of the repositioning cruise season. This is when many cruise lines offer some great discounts while moving their European vessels over to the Caribbean for the winter season. 

Greece Weather in September

The climate in Greece is typical of the Mediterranean countries with mild and rainy winters, warm and dry summers, and lots of sunshine. There are regional variations. The winter is milder in the Aegean and Ionian Islands as compared with the northern and eastern mainland of Greece. The Greek islands may be more humid than mainland Greece.

The beginning of September in Athens is still warm but the heat of the summer dissipates by the end of the month as fall approaches, though you might see a day or two that reaches as high as 82 degrees Fahrenheit.

  • Average high: 75 degrees Fahrenheit (24 degrees Celsius)
  • Average low: 66 degrees Fahrenheit (19 degrees Celsius) 

Expect sun at the beginning of September. The end of September also offers sunny skies, with just a little more chance of rain. It's swimming weather at the beach because the water is fairly warm, with an average sea temperature in September of 75 degrees Fahrenheit (24 degrees Celsius).

In the Greek islands, temperatures are just a little warmer. During September on Santorini, the average temperature is 77 degrees Fahrenheit (25 degrees Celsius) on September 1 and gradually decreases until it reaches an average of 72 degrees Fahrenheit (22 degrees Celsius) by the end of the month. And it's gloriously sunny in the Greek islands too. Greece enjoys an average of 11 hours of sunshine every day during September, making outdoor activities ideal.

What to Pack

You'll need good walking shoes for exploring ruins and walking along cobblestone streets. And, for the beach, sandals are perfect. If you'll be in the water, consider a pair of water-walking sandals to prevent injury in case you step on a sea urchin or sharp rock. 

A bathing suit is a must as are sundresses and short-sleeved shirts. Don't pack too many T-shirts because you'll find plenty of souvenir tees in Greece. For evening, or in case of a rare rain, bring a lightweight jacket. Toward the end of September when the weather is cooler, layering will keep you comfortable. In beach areas, you can enjoy dressing lightly with flowing cotton fabrics. If you are visiting churches or religious festivals, long pants or skirt and a sleeved shirt will be appropriate.

September Events in Greece

September in Greece brings opportunities to attend large events, music festivals, and small-village religious feast days.

  • Armata Festival: This maritime history festival takes place at the beginning of September in Spetses. The festival, marking the battle in the strait between Spetses and Kosta during the revolution of 1821, includes adult and children's theatre, local Greek dance, music, and shows. The grand finale, usually held around September 8, begins with a parade of lighted boats circling a specially constructed "Turkish ship," that will be destroyed in the ensuing battle re-enactment.
  • Athens International Film Festival: This large film festival takes place in late September for 12 days. Considered one of the world's most eclectic film festivals, this event offers something for everyone, from mainstream foreign commercial hits to undiscovered gems.
  • Genisis tis Panagias: Commemorations of the Birthday of the Virgin Mary take place on September 8. Termed Genisis (or Genesis) tis Panagias, every church in Greece will commemorate the day. People named for the Virgin Mary are called Panagia and will celebrate with an especially picturesque feast that is open to all.
  • Anhiolos Wine Festival: Wine lovers gather in Thessaloniki the first two weeks of the month. September is the grape harvest and many local wineries celebrate with events and tastings. Smaller wine festivals include the festival in Kos and wine festivals in Ambelona near Larissa and Karpathos-Amopi/ Lasto.
  • Thessaloniki International Trade Fair (TIF): While primarily a huge trade fair, TIF also has musical entertainment and exhibits of interest to visitors. Learn about the latest in cars, products, and services from around the world in a glitzy environment. 
  • Santorini International Music Festival: Located in Thira, the three-week festival features popular classical music orchestras, invited conductors, and world-class musicians. 
  • September Feast Days: Feast days are the designated days for churches to celebrate their namesake. The feast day often includes food, celebrations, and special religious services. If the day is also your personal namesake, you have reason to celebrate, too and since visitors are invited to these celebrations, you'll have a group of people to celebrate with. Even tiny chapels that are used only once a year are opened for a church service on a feast day followed by celebrating with wine and food. If you're lucky, you'll come upon one of these celebrations. 

September Travel Tips

  • Touring Greece requires sensible shoes. In fact, the Greek government banned the wearing of spike heels at historic sites as they can cause damage to the ancient areas.
  • You can avoid crowds by visiting toward the end of the month. But you need to check ahead because some attractions close when the children return to school.
  • Check the ferry schedules if you are going to the Greek islands. September and October are when ferries change their schedules and eliminate some connections.