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Santorini is not a beach island. That statement confuses people, because the photographs show water and cliffs and sand. But the point of Santorini is the caldera — the flooded volcanic crater that creates the views from Oia, Fira, and Imerovigli. And the caldera is an outdoor experience. You walk it, you photograph it, you eat dinner overlooking it. Which means the weather isn't background information. It's the main event.
Getting Santorini's weather wrong doesn't ruin a trip the way a rainy week in London ruins a trip — it reshapes it entirely. August heat at 37°C means the caldera walk between Fira and Oia becomes an endurance test rather than a pleasure. October calm means that same walk is one of the great experiences in European travel. The meltemi wind in July means your Venetian-table sunset dinner involves napkins blowing into the sea. May stillness means it's everything Instagram promised.
This guide covers each month honestly — temperatures, wind, rain, sea conditions, crowd levels, and what each month is actually like for a visitor. For island-wide planning, see 3 Days in Santorini. For country-wide weather, see Greece Weather by Month.
January
Temperature: 9–14°C (48–57°F) | Rainfall: 70 mm, 11 rainy days | Sea: 16°C | Wind: Moderate, variable
Santorini in January is not a tourist destination. It's a small island where 15,000 residents live their lives in quiet. Oia's caldera rim is empty. Most hotels are locked shut. The restaurants that remain open serve locals and the handful of visitors who come specifically for the solitude.
The weather is mild by Northern European standards — you won't freeze — but grey skies, periodic rain, and short daylight hours (10 hours) make this a contemplative visit rather than an active one. The volcanic landscape looks dramatic under winter light. The absence of crowds at the caldera edge is its own reward.
Come if: You want Santorini's geology and architecture without a single other tourist. Bring layers and rain gear. Don't expect services.
February
Temperature: 9–14°C (48–57°F) | Rainfall: 50 mm, 9 rainy days | Sea: 15°C | Wind: Moderate
Similar to January but with marginally more daylight and the first tentative signs of spring — wildflowers begin appearing on the hiking paths. Carnival season (Apokries) brings some local festivities. A few more restaurants may open toward the end of the month, testing the season.
Still very much off-season. Ferry service is minimal (2–3 per week to Athens). Domestic flights on Sky Express operate but with reduced frequency.
Come if: Same profile as January — solitude seekers and photographers.
March
Temperature: 11–17°C (52–63°F) | Rainfall: 40 mm, 7 rainy days | Sea: 16°C | Wind: Variable, occasionally strong
March is the month the island begins to stir. A few hotels and restaurants start reopening in the second half, testing the water (literally — the sea is still too cold for swimming). Wildflowers are in full bloom across the volcanic terrain, and the hiking between Fira and Oia through the countryside is at its most beautiful.
Weather is unpredictable. You might get three perfect spring days followed by a cold, windy day with rain. The Akrotiri archaeological site and the Museum of Prehistoric Thera are excellent wet-weather options — and blissfully uncrowded.
Come if: You want the island waking up, don't need swimming, and enjoy spring landscapes. Orthodox Easter sometimes falls in March and transforms the island.
April
Temperature: 14–20°C (57–68°F) | Rainfall: 20 mm, 4 rainy days | Sea: 17°C (cool but possible) | Wind: Light to moderate
April is when Santorini becomes genuinely pleasant. Temperatures are comfortable for full-day outdoor exploration, the caldera walk is ideal, and the island is open for business — most hotels and restaurants have launched their season by mid-April.
Rain drops significantly. Days stretch to 13+ hours. The light on the white buildings is sharp and clear without the summer haze. April is the month photographers love: excellent visibility, no crowds in the frame, wildflowers still in evidence.
The catch: swimming is marginal. Sea temperatures hover around 17°C — tolerable for brave souls, chilly for most. The beaches aren't fully operational yet.
Come if: Sightseeing and photography are your priorities. You don't need beach swimming. You want the island's beauty without the crowds. Prices are 30–40% below summer.
May
Temperature: 18–24°C (64–75°F) | Rainfall: 10 mm, 2 rainy days | Sea: 20°C (swimmable) | Wind: Light
May is many experienced travelers' choice for the single best month to visit Santorini. The weather approaches summer — warm, sunny, long days — without reaching the extremes that make July and August difficult. Rain is essentially gone. The meltemi wind hasn't started yet, meaning calm seas for sailing tours and catamaran cruises.
The sea reaches 20°C by mid-May — genuinely swimmable, especially on the caldera's sheltered west side and at Kamari and Perissa beaches on the east. The famous Santorini sunset catamaran cruises operate without the wind and waves that plague them later in summer.
Every restaurant, hotel, and attraction is open and operating. Crowds are present but manageable — you can get a dinner reservation in Oia with a day's notice rather than a week's. Prices are 15–25% below July–August.
Come if: You want the best overall experience. This is Santorini as it's meant to be experienced.
June
Temperature: 23–29°C (73–84°F) | Rainfall: 2 mm, essentially zero | Sea: 22°C | Wind: Light early month, meltemi building late
June divides cleanly. Early June (1st–15th) is a warm extension of May — near-perfect conditions, comfortable heat, calm seas, and manageable tourist numbers. It's arguably tied with late May as the finest two weeks of the Santorini year.
Late June shifts. Temperatures push past 30°C on warm days. The meltemi wind begins, initially as afternoon breezes, then strengthening. Cruise-ship traffic builds. The transition from "best of the year" to "peak season challenge" happens over about ten days.
The black volcanic sand at Kamari and Perissa absorbs heat aggressively — by late June, the sand is too hot for bare feet by midday. Bring beach shoes.
Come if: Early June specifically is outstanding. Late June is the start of summer intensity — still good but noticeably hotter and busier.
July
Temperature: 26–33°C (79–91°F), spikes to 36–38°C | Rainfall: Zero | Sea: 24°C | Wind: Meltemi, moderate to strong
July is summer Santorini at full volume. Every cruise ship, every tour group, every influencer, every honeymooner — they're all here simultaneously. Oia at sunset becomes a crowd-management exercise rather than a romantic experience. The caldera walk in midday heat is inadvisable. And the meltemi wind — the strong northerly that defines Cycladic summers — is now blowing consistently.
The meltemi is complicated. It cools the air temperature, making 33°C more bearable than 33°C would be on the mainland. But it also whips up rough seas on the east coast, can cancel or delay ferries, makes beach umbrellas weapons, and turns caldera-facing dining terraces into wind tunnels. West-facing Oia and Fira get the worst of it.
For swimming, Perissa and Kamari on the east coast are sheltered from the meltemi and the water is a gorgeous 24°C. But the sand will burn your feet.
Come if: Your schedule doesn't allow May, June, September, or October. Book everything months ahead. Use mornings for sightseeing. Evenings for everything else.
August
Temperature: 26–34°C (79–93°F), spikes to 38°C+ | Rainfall: Zero | Sea: 25°C (warmest) | Wind: Meltemi at peak strength
August is July with the dial turned up. Hotter, windier, more crowded, more expensive. The meltemi wind reaches its annual peak — ferries to and from Santorini are cancelled or severely delayed several times per month. The island's infrastructure (water supply, waste management, roads) is at maximum strain.
The famous Oia sunset attracts so many people in August that the castle area where everyone gathers becomes genuinely unpleasant — packed bodies, no space, people pushing for position. The sunset itself is identical to the one in May, but the experience is not.
Water temperature is the year's warmest at 25°C. If your primary goal is beach swimming and you're comfortable with extreme heat and wind, August delivers on that front. For everything else, it's the worst month by most metrics except ferry frequency.
Come if: You genuinely have no other option. The Santorini caldera remains beautiful in August — the crowds and conditions are what change.
September
Temperature: 23–30°C (73–86°F), cooling to 21–27°C late month | Rainfall: 10 mm, 1–2 rainy days | Sea: 25°C (still warm) | Wind: Meltemi fading, calm by late month
September is the comeback. The crushing heat breaks. The meltemi fades — by mid-September, the wind is intermittent rather than constant, and by late September, the Aegean goes calm. Ferries run reliably again. Cruise ships thin out. Oia at sunset is spectacular and physically possible to enjoy.
The sea is still 24–25°C — warmer than June — and Santorini's beaches are at their most pleasant: hot enough for sunbathing, not so hot the sand burns. The light shifts to a golden-amber quality that makes the white buildings glow. Professional photographers know this: September and October light on Santorini is the best of the year.
Prices begin dropping mid-month. Late September offers 15–20% savings over peak with near-identical weather.
Come if: You want summer Santorini without summer's problems. Late September is arguably the finest time to visit alongside late May.
October
Temperature: 18–24°C (64–75°F) | Rainfall: 40 mm, 5–6 rainy days | Sea: 23°C (still swimmable) | Wind: Light
October is Santorini's hidden gem — and the month that separates casual tourists from experienced travelers. Temperatures are ideal for outdoor exploration (20–24°C most days). The sea is still 23°C and swimmable. Rain returns but in scattered form — a shower here, a grey morning there, then back to sunshine.
Early October (1st–15th) is functionally late September with smaller crowds. Late October sees more closures and unpredictability — some restaurants and hotels begin winding down their season.
The sunset from Oia in October is the same sun, the same caldera, the same colors — but you might be sharing it with dozens rather than thousands. Flights and hotels are 25–40% below August prices.
Come if: You want the best value-to-experience ratio of the year. Sightseeing, photography, hiking, swimming — all excellent.
November
Temperature: 14–19°C (57–66°F) | Rainfall: 55 mm, 8 rainy days | Sea: 20°C (possible for swimmers) | Wind: Variable, can be strong
November is the curtain call. The island transitions to winter mode over the course of the month. Early November still has some summer afterglow — restaurants hanging on, weather cooperating on good days. By late November, most businesses have closed, ferry schedules are reduced, and the island feels empty.
The weather is genuinely unpredictable: you might get a string of warm, sunny days that feel like September, or a week of grey skies and wind that feels like winter. Not a month for anyone who needs guaranteed conditions.
Come if: You're comfortable with uncertainty and want to see the seasonal transition. Early November is the last realistic window for a standard visit.
December
Temperature: 10–15°C (50–59°F) | Rainfall: 70 mm, 11 rainy days | Sea: 17°C | Wind: Variable, periodic storms
December Santorini is the quietest version of the island. The caldera views are extraordinary on clear winter days — the light is low and sharp, the volcanic landscape looks its most dramatic. But services are minimal: a handful of restaurants in Fira, very few hotels, limited ferry connections.
The island's tiny permanent population celebrates Christmas and New Year quietly. If you come, you come for the landscape and the silence, not for services or activities.
Come if: You want to experience a famous place in its most unfamiliar form. Beautiful but logistically challenging.
Quick-reference weather table
Month | Avg High | Avg Low | Rain (mm) | Sea Temp | Wind | Rating
Jan | 14°C / 57°F | 9°C / 48°F | 70 | 16°C | Moderate | ★☆☆☆☆
Feb | 14°C / 57°F | 9°C / 48°F | 50 | 15°C | Moderate | ★☆☆☆☆
Mar | 17°C / 63°F | 11°C / 52°F | 40 | 16°C | Variable | ★★☆☆☆
Apr | 20°C / 68°F | 14°C / 57°F | 20 | 17°C | Light | ★★★★☆
May | 24°C / 75°F | 18°C / 64°F | 10 | 20°C | Light | ★★★★★
Jun | 29°C / 84°F | 23°C / 73°F | 2 | 22°C | Building | ★★★★☆
Jul | 33°C / 91°F | 26°C / 79°F | 0 | 24°C | Strong | ★★★☆☆
Aug | 34°C / 93°F | 26°C / 79°F | 0 | 25°C | Strong | ★★☆☆☆
Sep | 30°C / 86°F | 23°C / 73°F | 10 | 25°C | Fading | ★★★★★
Oct | 24°C / 75°F | 18°C / 64°F | 40 | 23°C | Light | ★★★★★
Nov | 19°C / 66°F | 14°C / 57°F | 55 | 20°C | Variable | ★★☆☆☆
Dec | 15°C / 59°F | 10°C / 50°F | 70 | 17°C | Variable | ★☆☆☆☆
The meltemi wind: Santorini's hidden variable
Most weather guides ignore the meltemi, which is a serious omission. These strong northerly winds blow across the Cyclades — including Santorini — from mid-June through mid-September, peaking in July and August.
What it does: Cools the air (making 33°C feel like 28°C in the shade), but creates rough seas (ferry delays and cancellations), makes east-coast beaches choppy, turns caldera-rim dining into a wind-management exercise, and can make the Fira-to-Oia hike unpleasant when gusting above 30 km/h.
Where it hits hardest: The caldera rim (Oia, Fira, Imerovigli) faces north-northwest and catches the meltemi directly. East-coast beaches (Kamari, Perissa) are more sheltered. The Red Beach and Vlychada on the south coast are the most protected.
How to plan around it: Book restaurants with indoor/sheltered seating as backup. Choose south-coast beaches on strong meltemi days. Schedule catamaran cruises for May or September when seas are calm. Check Windy.com forecasts before booking ferries.
FAQs about Santorini weather
What is the best month to visit Santorini for weather?
May and late September through mid-October. Both offer warm temperatures (20–28°C), swimmable seas, minimal wind, and significantly fewer crowds than summer. Early June is also excellent.
Can you swim in Santorini in October?
Yes. Sea temperatures average 23°C in October — comfortable swimming, especially in early-to-mid October. The east-coast beaches (Kamari, Perissa) and Red Beach on the south coast are the best options.
How hot does Santorini get in summer?
Very hot. July and August regularly reach 33–38°C. The meltemi wind provides some cooling but also creates rough seas and uncomfortable conditions on the caldera rim. The black volcanic sand at beaches absorbs extreme heat.
Is Santorini open in winter?
Partially. The island doesn't close entirely, but 60 to 80 percent of hotels and restaurants shut down from November through March. Ferry service is reduced to a few sailings per week. A handful of restaurants in Fira remain open year-round.
Does it rain on Santorini?
Rarely from May through September. Nearly all rain falls between October and March, with January and December being the wettest months. Even in winter, rain comes in bursts rather than continuous days of drizzle.
What is the meltemi wind and how does it affect Santorini?
The meltemi is a strong northerly wind that blows across the Cyclades from mid-June through September, peaking in July and August. It cools air temperatures but creates rough seas that can cancel ferries, makes caldera-rim dining uncomfortable, and whips up waves on east-coast beaches.
Plan your Santorini trip
- 3 Days in Santorini — detailed itinerary
- Trip to Santorini — complete guide
- Greece Weather by Month — country-wide patterns
- Best Time to Travel to Greece — timing your trip
- Visiting Greece in October — shoulder season guide
- Flights to Greece from USA — getting there
- Is Greece Expensive? — cost breakdown
- How to Plan a Trip to Greece — planning guide
🎒 Planning your Santorini dates? Take our quiz for personalized timing recommendations, or try our AI Trip Planner for a custom itinerary.