December in Santorini: climate and what to expect

December mornings in Santorini arrive grey and damp, with temperatures hovering around 12.9°C (55°F) and climbing only to 16.2°C (61°F) by afternoon. Rain falls on roughly 9 of the 31 days, totaling about 47mm—enough to keep the island verdant but not enough to ruin plans. You'll get around 8 hours of sunshine daily, mostly in the afternoon when clouds thin and the light turns golden across the caldera. Evenings cool quickly; the Aegean wind picks up after sunset, and locals retreat indoors by 7pm.

The island empties in December. Cruise ships vanish, tavernas on the waterfront shutter for the season, and streets in Fira and Oia feel like you've stumbled into a Greek village rather than a tourist postcard. Hotels slash rates by 40–60%, and restaurants serve locals again instead of tour groups. You'll see families preparing for Christmas, fishing boats in Amoudi Bay, and the occasional wedding—December is still popular for elopements. The atmosphere is intimate, almost secretive, and prices reflect the low season across food, accommodation, and activities.

Over the past decade, December temperatures have remained stable, fluctuating only ±1°C around the 16°C average. Rainfall patterns are consistent too—2026 is tracking normally for the month. What has shifted is wind intensity; winters have grown slightly windier, which means the caldera views can be dramatic one day and hazy the next. Pack flexibility rather than expecting predictability.

December suits couples seeking solitude, photographers wanting empty landscapes and moody skies, and travelers on tight budgets. Families with school holidays should book early—the few days around Christmas do fill up. Hikers will find cooler temperatures ideal for the Fira-to-Oia trail. Avoid this month if you're set on beach swimming or outdoor dining; if you embrace quietness and layering, 2026 in December is Santorini at its most authentic.