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Stay in Santorini in September
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The most important thing about September on Santorini is the water. The Aegean typically reaches around 24 to 25°C (75 to 77°F), its warmest temperatures of the year, while the oppressive August air heat retreats to a daily average high of 27.3°C (81°F). Add near-zero rainfall at 5mm for the entire month and crowds that thin noticeably from the second week, and you have what might be the island's optimal visiting month.
The grape harvest, called vendema in the local dialect, defines September across the island's interior. Megalochori and Pyrgos host small harvest celebrations with grape pressing and fresh must. The volcanic-ash vineyards that grow Santorini's Assyrtiko variety shift into their most active season. The harvest gives September a texture that the peak tourism months of July and August lack.
The daily rhythm tilts in your favor, too. By mid-September the KTEL buses from Fira to Oia still run every 20 minutes, but the morning queues at Akrotiri's ticket window have halved. Established caldera-rim wineries like Santo Wines in Pyrgos and Venetsanos near Megalochori accept walk-in tastings on most weekday afternoons, something unthinkable in August. Ferries from Piraeus still depart multiple times daily, and Aegean Airlines runs 3 to 4 Athens-Santorini flights through the month. The island hasn't shut down for autumn yet, but it has loosened its grip enough that a 3-night stay covers the caldera hike, a vineyard day, and an east-coast beach morning without feeling rushed.
Why visit in September
- Sea temperature reaches its annual peak, making September the warmest month for swimming off Kamari and Perissa beaches on the east coast.
- The August crowds begin thinning by mid-September, meaning shorter queues at the Akrotiri archaeological site and less competition for sunset-viewing spots in Oia.
- The vendema grape harvest opens vineyard estates across the caldera to visitors, with tastings during harvest season tending to be more personal and with direct access to the pressing process.
- Rain is virtually nonexistent, and the persistent meltemi winds that define July and August tend to calm after the first two weeks, leaving the Aegean flatter for swimming and boating.
Worth knowing
- September is not a discount month. Accommodation rates have dropped from the August peak but remain firmly in the expensive tier, and last-minute caldera-view availability is scarce.
- Cruise ships continue docking through mid-September, with up to 5 vessels anchoring off Fira on heavy days. The caldera villages fill with day-trippers between 10:00 and 16:00.
- Some smaller tavernas and beach bars on the east coast begin seasonal closure in the last week of September, narrowing dining options in Kamari and Perissa.
- The meltemi wind can still gust strongly in early September, occasionally canceling smaller boat excursions to Nea Kameni or Thirassia on short notice.
Best for
Think twice if
Late summer at its most forgiving on Santorini. The fierce July and August heat has pulled back, and mornings start in the low twenties Celsius before the afternoon climbs to the upper twenties. Humidity is moderate by Aegean standards, well below the sticky conditions common in mainland Athens during the same period. The persistent meltemi northerly winds that define midsummer tend to calm by mid-September, leaving the sea flatter for swimming and boating. Rain is a non-factor, with most Septembers recording a single rainy day or none at all. Evenings cool enough for a light layer, particularly at elevation in Pyrgos or along exposed caldera-edge paths.
Seasonal caution
- The UV index regularly reaches 7 to 8 on clear September days at this latitude, strong enough to cause sunburn within 20 minutes on unprotected skin. Santorini's whitewashed surfaces amplify reflected UV from every direction.
Year-round climate
Averages from the last 5 years.
| Month | Avg high (°C) | Avg low (°C) | Rainfall (mm) |
|---|---|---|---|
| Jan | 16 | 12 | 41 |
| Feb | 15 | 12 | 35 |
| Mar | 17 | 12 | 32 |
| Apr | 20 | 15 | 13 |
| May | 23 | 18 | 16 |
| Jun | 28 | 22 | 5 |
| Jul | 30 | 25 | 1 |
| Aug | 30 | 25 | 3 |
| Sep | 27 | 23 | 5 |
| Oct | 23 | 19 | 10 |
| Nov | 21 | 17 | 21 |
| Dec | 17 | 14 | 60 |
Best things to do in September
Swimming at Kamari and Perissa beaches
beachThe east coast's two main black volcanic-sand beaches offer the island's warmest and calmest swimming conditions. Kamari sits at the northern foot of Mesa Vouno, while Perissa stretches along the southern base. Both have organized sections with loungers and free-access stretches.
Sea temperature reaches its annual peak in September, making extended open-water swimming comfortable without a wetsuit.Booking tipNo booking needed. Arrive before 10:00 for a front-row lounger on the organized section. The free stretch at Perissa's southern end stays uncrowded through midday.
Hiking the Fira-to-Oia caldera trail
hikingA roughly 10 km (6.2 mi) path following the caldera rim from Fira through Firostefani and Imerovigli to Oia. The route crosses loose volcanic rock, stone steps, and exposed ridgeline with views down into the caldera and out toward the open Aegean.
September mornings start several degrees cooler than July and August, making a dawn departure feasible without heat exhaustion risk on the exposed trail.Booking tipCarry at least 1.5 liters of water per person. Start from Fira heading north by 7:00 so the morning sun stays at your back. Allow 3 to 4 hours at a moderate pace.
Vineyard harvest tour in Megalochori
food and drinkEstate vineyards in and around Megalochori village open their harvest operations to visitors during vendema. You can watch Assyrtiko grapes being picked from the traditional low, basket-trained kouloura vines that protect against wind, and taste the fresh-pressed must.
The Assyrtiko harvest happens in September. This is the only month you can see the full vine-to-press cycle.Booking tipContact vineyards directly at least a week ahead. Group sizes are small during harvest season. Santo Wines and Venetsanos both run harvest-period experiences, though schedules shift with the picking calendar.
Boat excursion to Nea Kameni volcano
sightseeingThe volcanic islet at the center of the caldera is reachable by tour boat from Fira's old port or from Athinios. The hike to the summit crater takes about 30 minutes across barren volcanic rock, passing sulfur vents with panoramic caldera views.
Calmer seas in mid to late September and fewer tour boats than August mean a less crowded crater walk and a smoother crossing.Booking tipBook 2 to 3 days ahead. Afternoon departures tend to be less crowded than morning. Combined tours that include the hot springs at Palea Kameni add roughly 30 minutes to the trip.
Exploring the Akrotiri archaeological site
cultureA Bronze Age Minoan settlement preserved under volcanic ash, sometimes called the Pompeii of the Aegean. A protective bioclimatic roof covers the excavated streets and multi-story buildings, keeping visitors shaded even on warm September days.
Visitor numbers drop noticeably in the second half of September. Weekday mornings may give you entire sections of the site nearly to yourself.Booking tipTickets are available on-site, but the combined ticket covering Akrotiri and the Museum of Prehistoric Thera in Fira saves a few euros if you plan to visit both.
Sunset from Skaros Rock
sightseeingAn exposed promontory on the caldera rim in Imerovigli, once the site of a medieval Venetian fortress. The short scramble from the main path leads to unobstructed western views across the caldera and toward Oia.
September sunsets arrive earlier, around 19:15 versus 20:45 in June, producing a long golden hour from mid-afternoon onward.Booking tipNo booking needed. Wear grippy shoes for the final rocky descent to the viewpoint.
Snorkeling at Amoudi Bay
water sportsBelow Oia's cliffs, Amoudi Bay offers rock-entry snorkeling among volcanic formations. The red-cliff backdrop is distinctive, and the underwater rock structures attract small fish and octopus.
Peak water temperature and the calmest sea conditions of the year align in September, giving the best underwater visibility around the bay's volcanic rocks.Booking tipBring your own gear or rent from shops in Oia before descending the 300 steps to the bay. There is no gear rental at the bay itself.
What to eat in September
On menus now
Tomatokeftedes
Santorini's signature tomato fritters, made from the island's tiny cherry tomatoes (ntomataki Santorinis) at their September peak ripeness. The volcanic soil concentrates their sugar content. September is the final month to taste them at their most intense before the harvest ends.
Fava Santorinis
Yellow split pea puree with PDO status, traditionally drizzled with caper oil and raw onion. The September harvest of Santorini's fava beans yields the freshest version of this dish, served at tavernas across the island's interior villages.
What to drink
Fresh Assyrtiko must
Unfermented or lightly fermented grape juice pressed during the September vendema. It tastes sharply sweet with a mineral edge from the volcanic soil. A September-only experience on the island, available at vineyard estates in the caldera's southern half.
In markets
White eggplant of Santorini
A local variety grown only on the island, sweeter and less bitter than the common purple type. It peaks in late summer and appears across September menus grilled, roasted, or folded into the island's variation on moussaka.
Chlorotyri
A fresh, tangy goat's milk cheese produced on Santorini, soft and crumbly. In September it pairs with the season's last ripe tomatoes and brined capers for salads that exist only during harvest weeks.
Regular events in September
Genesi tis Theotokou (Birth of the Virgin Mary)Free
One of the major feast days in the Greek Orthodox calendar, celebrated with liturgy and a communal meal at Panagia Episkopi church in the village of Mesa Gonia. The Byzantine church is one of the oldest standing structures on Santorini.
September 8Ypsosis tou Timiou Stavrou (Exaltation of the Holy Cross)Free
A country-wide Greek Orthodox feast day observed with church services across Santorini. Smaller village churches hold evening vespers, and some local bakeries produce festive breads for the occasion.
September 14Vendema harvest gatheringsFree
Informal village celebrations marking the grape harvest season, with grape pressing, local wine, music, and communal tables in village squares. Not a single organized festival but a series of small, recurring gatherings across the island's agricultural interior.
Mid to late September, dates vary by villageBest places this September
Skaros Rock
viewpointA medieval Venetian fortress remnant on a headland that juts into the caldera. A 15-minute scramble from the main Imerovigli path leads to a 270-degree panorama. September draws a fraction of the crowd that gathers at Oia's kasteli for sunset.
ImerovigliMuseum of Prehistoric Thera
museumOpened in 2000, this museum houses the frescoes excavated from Akrotiri, including the Spring Fresco and the Boxing Boys. September's thinner visitor flow means more time in front of the Bronze Age wall paintings without being shuffled along.
FiraAncient Thera
archaeological siteRuins of a Hellenistic and Roman-era city on the summit of Mesa Vouno, the mountain between Kamari and Perissa. The switchback road or footpath from Kamari climbs about 370 m (1,214 ft). September's lower temperatures make the ascent far more tolerable than in midsummer heat.
Mesa VounoEmporio village kasteli
villageThe largest medieval fortified settlement on Santorini, with a maze of narrow stone passages originally designed to confuse pirate raiders. September foot traffic in this interior village is light, offering a quieter side of the island that most caldera-focused visitors miss.
EmporioPerissa Beach
beachA long black volcanic-sand beach on the southeast coast, backed by the cliffs of Mesa Vouno. September's calm sea and warm water make this the best month for a full beach day here. The southern end stays uncrowded even while the organized section fills at midday.
PerissaMuseum of Ancient Greek, Byzantine and Post-Byzantine Instruments
museumA small museum in Oia, open since 1984, displaying playable reconstructions of ancient Greek musical instruments. Worth a visit when exploring Oia's quieter northern end, away from the sunset crowds at the kasteli.
OiaPyrgos hilltop and Kasteli Pyrgou
villageThe highest settlement on Santorini offers 360-degree views from the hilltop ruins of Kasteli Pyrgou. September brings the grape harvest to surrounding vineyards, and the village's narrow lanes stay nearly empty compared to the caldera-rim towns below.
Pyrgos
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Insider tips
Walk the caldera trail from Fira to Oia heading north, starting by 7:00. The morning sun stays behind you rather than in your eyes, and you arrive in Oia around 10:00 before the first wave of cruise ship passengers makes it up from the old port.
Skip sunset at Oia Castle and walk to Skaros Rock in Imerovigli instead. On most September evenings you'll share the promontory with fewer than a dozen other people.
For the freshest tomatokeftedes, eat at inland tavernas in Pyrgos or Emporio rather than the caldera rim. These villages source from nearby farms where September's final cherry tomato harvest still arrives daily.
The KTEL bus from Fira to Oia runs every 20 minutes through September. The last departure from Oia is around 23:00, late enough to watch sunset without worrying about transport back.
Book your return ferry from Santorini to Piraeus at least 3 to 4 days ahead for September weekend departures. The Friday and Sunday sailings fill first. High-speed catamarans sell out before conventional ferries.
Avoid these mistakes
- Booking a sunset dinner at a caldera-rim restaurant without a reservation, even in September. The reduced crowds mislead visitors into expecting walk-in availability, but the best-positioned tables in Oia and Fira still fill by 18:00.
- Wearing flip-flops on the caldera trail from Fira to Oia. The path crosses loose volcanic scree and polished stone steps for several hours. Proper walking shoes with grip prevent the ankle injuries that are common on this route.
- Spending every day on the caldera rim and missing the east coast entirely. Kamari and Perissa have the island's best swimming beaches, with September crowd levels far lower than the western villages.
- Packing only beachwear. September evenings on the caldera drop into the low twenties Celsius, and restaurants at elevation feel cool once the wind picks up. Visitors who packed for August temperatures end up buying overpriced cover-ups from tourist shops in Fira.
- Renting an ATV late in the morning on a September weekend. Rental agencies in Fira run through their inventory by 10:00 or 11:00 on busy days. Reserve at least a day ahead, or pick up at opening.
Practical tips for September
Ferry service from Piraeus to Santorini operates at near-peak frequency through September. The conventional ferry crossing takes 5 to 8 hours depending on the route and stops, or roughly 4 to 5 hours by high-speed catamaran. Blue Star Ferries and SeaJets run the most frequent sailings. Book return ferries at least 3 to 4 days ahead, as weekend departures fill. Aegean Airlines and Sky Express operate 3 to 4 daily flights from Athens, with a flight time of about 45 minutes. The KTEL bus network connects Fira to all major villages regularly through September, though some evening routes shift to reduced frequency after mid-month. ATV and car rental agencies in Fira run low on inventory by late morning during September weekends, so reserve ahead or pick up early. Santorini scores 7.5 out of 10 for LGBTQ+ friendliness (sourced from TTDI's editorial rubric), and the island's hospitality industry, built primarily around couples travel, serves all visitors without distinction. Most restaurants and shops in the caldera-rim villages maintain full summer hours through the end of September. A handful of smaller east-coast tavernas begin seasonal closure in the final week. Dress code is relaxed island-wide, but covered shoulders are expected in Orthodox churches, which matters more in September when the feast-day calendar is active. Tipping is not obligatory at restaurants, but rounding up or leaving 5 to 10 percent is appreciated. The currency is the euro.
FAQ
Is September a good time to visit Santorini?
September ranks among the top two months for a Santorini visit. The sea is at its warmest, rain is nearly absent, and the August crowd pressure lifts noticeably by mid-month. The grape harvest adds a cultural layer that peak summer lacks. The island is not at budget pricing in September, but the combination of warm water, dry weather, and vineyard access is hard to match in any other month.
What is the weather like in Santorini in September?
Clear skies with warm days and almost no rain. Mornings feel easy in the low seventies Fahrenheit, and afternoons reach the low eighties. Humidity stays moderate, well below the mainland. The strong meltemi winds of midsummer begin to ease after the first week or two, leaving the sea calmer for swimming and boating.
Is Santorini crowded in September?
Less than July or August, but still busy in the first half of the month. Cruise ship passengers fill the caldera villages during the middle of the day. By the third week the island feels markedly less packed, particularly in interior villages like Emporio and along the east coast beaches.
Can you swim in the sea at Santorini in September?
September is probably the best swimming month on the island. The Aegean reaches its annual warmth peak, and the reduced meltemi wind means calmer, flatter water. Kamari and Perissa on the east coast have the longest sandy beaches, while Amoudi Bay below Oia offers rock-entry swimming among volcanic formations. The water temperature stays warm enough through the month that a wetsuit is unnecessary.
Do I need to book Santorini hotels in advance for September?
Yes, especially for caldera-view rooms. September is the second-most-requested month after August for this island, and the better-reviewed hotels in Fira, Oia, and Imerovigli fill 4 to 6 weeks ahead. East-coast accommodation in Kamari and Perissa has more last-minute availability and sees the first discounts by the third week.
Things to Do in Santorini in September
Free cancellation Premium Small-Group Catamaran Cruise with BBQ, Open Bar, Transfer
Day trip: 5 hours, free cancellation.
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Free cancellation Santorini Classic Catamaran Cruise with BBQ, Drinks and Transfers
Day trip: 5 hours, free cancellation.
via Viator
Free cancellation Half-Day Exclusive Catamaran Cruise in Santorini with Meal and Open Bar
Day trip: 5 hours, free cancellation.
via Viator
Free cancellation Private Santorini Tailor Made - Choice of the Guest!
Day trip: free cancellation.
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Free cancellation Santorini Wine Adventure with 12 Wine Tastings, Tapas and Sunset
Cooking class: 4 hours, free cancellation.
via Viator
Free cancellation Half Day Premium Catamaran Cruise in Santorini including Oia
Day trip: 5 hours, free cancellation.
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