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: Temperatures, Sea Temp & Best Time

Last updated: March 2026

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