Last reviewed: September 2026 · key facts checked against Wikidata

Santorini Weather by Month: When to Go

Best for swimmingJun – OctSea 22 °C+ and warm days

Best for hikingMar – May, Oct – DecDays 15–25 °C, little rain

Sea temperature17 – 26 °CWarmest in August

Monthly averages · Fira and the caldera

Month	Day	Night	Sea	Rain days	Rain mm	Wind km/h	Good for
Jan	14°	10°	18°	10	48	34	–
Feb	14°	10°	17°	7	47	33	–
Mar	15°	11°	17°	7	43	33	Hike
Apr	18°	13°	18°	4	13	28	Hike
May	22°	17°	19°	3	11	26	Hike
Jun	26°	21°	23°	1	5	25	Swim
Jul	29°	23°	25°	0	1	29	Swim
Aug	28°	23°	26°	1	2	27	Swim
Sep	26°	21°	25°	1	5	28	Swim
Oct	22°	18°	23°	3	13	26	SwimHike
Nov	19°	15°	21°	4	25	28	Hike
Dec	15°	12°	19°	10	54	31	Hike

Sources: ERA5 reanalysis via Open-Meteo, 2016–2025 (10-year average) for air temperature, rain and wind (average daily maximum); Open-Meteo Marine API, 2023–2025 for sea surface temperature. A rain day has at least 1 mm. Area averages; individual years vary.

Santorini Travel Guide: Everything You Need to Know (2026)

Travel tips for Santorini.

Tours & Activities in Santorini

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Explore our complete travel guides for more Europe destinations: Budapest Travel Guide (2026), Metz Travel Guide (2026), Côte dAzur Travel Guide (2026), Avignon Travel Guide (2026), Dordogne Travel Guide (2026).

Santorini at a Glance

Population	17,430
Currency	EUR (€)
Official language	Greek
Time zone	UTC+02:00

Source: Wikidata, retrieved September 2026.

Useful Resources for Planning Your Trip to Santorini

• Wikipedia: Santorini — history, geography and background
• Lonely Planet: Santorini — itineraries and travel inspiration
• TripAdvisor: Santorini — hotels, restaurants and traveller reviews