Santorini in July is high summer in full swing: hot, dry, reliably sunny days, a sea that's warmed up for proper swimming, and an island running at full peak-season tilt. It's a shade less ferocious than August and the daylight is longer, but the crowds and prices are already near the top. As ever, the smart move is to sleep on the black-sand southeast coast at Perissa, where the warm sea and long beach days come without the caldera-side crush. Here's what the weather does, how busy it gets, and how to plan a great July trip.
TL;DR — Santorini in July at a glance
| Question | Short answer |
|---|---|
| How warm is it? | Hot — daytime highs around 29–32°C, warm evenings |
| Is the sea warm? | Warm — around 24°C, comfortable for long swims |
| Is it windy? | The meltemi north wind can blow hard, cooling the air and churning exposed seas |
| How long are the days? | Long — around 14 hours of daylight, just past the June peak |
| Is it busy? | One of the busiest months — near peak, building toward the August apex |
| Best for | Guaranteed heat, warm sea and long days, with the Jazz Festival on |
July weather in Santorini
July is hot, dry and dependably sunny — classic Cycladic high summer. Daytime highs run around 29–32°C, with warm evenings around 22–24°C that rarely need a layer, and rain is very rare — most Julys are essentially dry. It's a touch cooler than the peak of August, and the daylight is still generous at around 14 hours, just off the June solstice, giving long golden evenings. The seasonal quirk is the meltemi, the strong dry north wind that blows across the Aegean through July and August, sometimes for days at a time: it cools the sweltering heat pleasantly, but it can make the sea choppy and disrupt boat trips and ferries.
| Measure | Early July | Late July |
|---|---|---|
| Avg daytime high | ~29°C | ~31°C |
| Avg overnight low | ~22°C | ~23°C |
| Sea temperature | ~23–24°C | ~24°C |
| Daylight | ~14.3 hrs | ~13.9 hrs |
| Rainfall (whole month) | ~0–3 mm total | — |
| Crowd level | Busy, near peak | Peak building |
These are cross-checked seasonal averages, not a forecast. July is about as dependably hot, dry and sunny as the Mediterranean gets — the main variable is the meltemi, which some years barely shows and others blows hard for a week.
Is the sea warm in July?
Yes — the water is warm and swimmable, around 24°C, a little below the late-summer peak but ideal for long swims, snorkelling and boat trips. The long black-sand beaches of Perissa and Perivolos are in full beach-month mode: warm sand, warm sea and relentless sun. The caveat is the meltemi — when the north wind is up, exposed and north-facing beaches turn choppy, though Perissa and Perivolos on the sheltered southeast coast usually stay more swimmable than the wind-hit spots. For the best of the coast, see the best beaches near Perissa. The water keeps warming into August, when it peaks at 25–26°C.
Crowds in July: near peak, and building
July is one of the busiest months of the year — peak tourist season, with cruise ships calling, Oia's sunset viewpoints filling early, and the best caldera restaurants needing reservations. It's not quite the mid-August apex, but it's close, and the second half of the month is livelier than the first as the European summer holidays get going. Prices are near the top. If your dates are flexible, early July is marginally calmer and cheaper than late July for essentially the same weather.
As always, where you base yourself changes the trip. The crush concentrates on the caldera at Fira and Oia; the southeast coast around Perissa and Perivolos stays comparatively relaxed even in July, which is the strongest argument for sleeping on the black-sand side and day-tripping to the caldera. Weigh July against the calmer shoulder months in our best time to visit Perissa guide — June offers similar warmth with a fraction fewer people.
What's on: the Santorini Jazz Festival
July's cultural highlight is the Santorini Jazz Festival, which has run for decades and stages open-air concerts at the Cine Kamari outdoor cinema over on the neighbouring beach of Kamari, usually in late July (the 2026 edition runs 25–28 July; dates shift each year, so check the current programme). It's an easy evening out from Perissa — just over the Mesa Vouno headland — and a lovely way to use a warm July night. Beyond that, the beach clubs of Perivolos run their full summer schedule of daytime and sunset music.
Making the most of July
July rewards a beat-the-heat rhythm: beach early while the sun is kinder, retreat through the fierce midday hours, then head out again for the late afternoon and sunset. The exposed excursions — the Nea Kameni volcano walk, the caldera-rim path, and Ancient Thera and the Mesa Vouno hike above Perissa — should be done first thing in the morning, with a hat, real sun protection and plenty of water, because the black ground radiates heat and there's little shade. Save boat trips, wineries and beach lounging for the day's hotter stretches. For buses, cash and other logistics, see the practical-info page.
Because July is peak season, book the things that sell out: catamaran cruises, the volcano-and-hot-springs boat tour, sunset sailings, the best Oia and Fira dinner tables, and ATV or car rentals all go early, so lock them in before you arrive. The KTEL buses link Perissa with Fira (roughly 25 minutes, about €2.70), with onward changes for Oia, Athinios port and the airport near Kamari, running frequent peak-season timetables — though they're busy at peak times.
Frequently Asked Questions
Is July a good time to visit Santorini?
July delivers guaranteed hot, dry, sunny weather, a warm sea around 24°C, long daylight and everything fully open, plus the Santorini Jazz Festival — but it's one of the busiest and most expensive months, with peak crowds and the meltemi wind. It's great if you want dependable summer and don't mind the crowds; June or September offer similar warmth with more space.
How hot is Santorini in July?
Hot — daytime highs of around 29–32°C with warm evenings around 22–24°C, and rain is very rare. It's a touch cooler than peak August. The black volcanic sand and rock radiate heat, so exposed hikes are best done early with plenty of water.
Can you swim in Santorini in July?
Yes — the sea is warm, around 24°C, ideal for long swims and snorkelling. The black-sand beaches of Perissa and Perivolos are perfect for full beach days, though when the meltemi north wind blows, exposed beaches turn choppy while the sheltered southeast coast usually stays calmer.
Is Santorini crowded in July?
Yes — it's one of the busiest months, near the peak, with cruise crowds, packed sunsets and restaurants needing reservations. It's slightly below the mid-August apex, and early July is marginally calmer than late July. Basing on the quieter Perissa side keeps things relaxed while you day-trip to the caldera.
