What is the rainy season in Santorini?

November through February. Rainfall peaks in December and January at roughly 80 to 90 mm per month spread across 10 to 12 rainy days. Outside those months Santorini gets less than 10 mm per month. From May through September, rain is almost a non-event.

When should you NOT visit Santorini?

Mid-July through mid-August if you dislike crowds, queues at Oia sunset, or 40 degree heat. January and February if you want most cliffside hotels, restaurants, and ferry connections open. Mid-November to mid-December has the most unpredictable weather and the fewest reasons to be here. Anything else is fine.

Is May or June better for Santorini?

Both are excellent. May has cooler air (mid-20s C), wilder wildflowers, fewer crowds, and a sea still warming up (around 19 degrees C). June has warmer water (around 22 degrees C), longer days, and the season fully open, but visibly more crowds. For first-timers focused on sightseeing, May. For swimming and beach days, June.

Is it warm enough to swim in Santorini in April?

Most travelers say no. Sea temperatures average 17 to 18 degrees C in April. Hardy swimmers and locals will dip in, but most visitors find it bracing. May warms to around 19 to 20 degrees C, and by mid-June you are in 22+ degree water.

What is the hottest month in Santorini?

July and August tie at an average of 29 degrees C (85 degrees F). August can feel hotter, the Meltemi isn't always consistent, and accumulated summer heat pushes sea and land temperatures to their annual peak.

Does it rain in Santorini in summer?

Almost never. June through September averages fewer than 1-2 rain days across those four months combined. Leave the umbrella at home if you're visiting May through October.

Is Santorini too windy in July?

The Meltemi is real, gusts hitting 50+ km/h on strong days. It can delay boats and make exposed areas uncomfortable. But many visitors appreciate it for keeping temperatures bearable. South-facing beaches are sheltered. The wind usually calms by evening.

When is the sea warm enough to swim in Santorini?

June through October. Santorini sea temperature ranges from 22-25 degrees C across those months. September often has the best swimming: warm water (24 degrees C), fewer crowded beaches, no Meltemi. May and November sit around 19 degrees C, swimmable, but you'll know it.

What is the best month to visit Santorini for the first time?

September or May. Warm santorini weather, manageable crowds, everything open, prices below peak. September wins slightly thanks to warmer seas and softer light. Full comparison in our [best time to visit Santorini guide](/discover/best-time-to-visit-santorini).

What should I pack for Santorini in October?

Light layers. Santorini weather in October still hits 23 degrees C during the day, t-shirts and light trousers work fine. Jacket for evenings. A rain layer just in case. Comfortable walking shoes for cobblestone streets. Don't forget swimwear, the sea is still 22 degrees C. See our [3-day Santorini itinerary](/discover/santorini-itinerary-3-days) for a packing-friendly trip plan. --- This guide is part of our [Ultimate Santorini Travel Guide](/discover/santorini-travel-guide). For accommodation

Rocky caldera cliffs of Santorini under dramatic clouds with the Aegean Sea below

Travel Guide

Santorini Weather by Month: Sea Temps, Rain & Best Time to Visit

Last updated: March 2026

Loading article...

Santorini Weather by Month: Sea Temps, Rain & Best Time to Visit | Aroma Suites