Santorini Weather
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Live forecasts update automatically; written guidance last reviewed 14 June 2026 by the Pressorbit weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The UK’s maritime climate means planning a sunny getaway can be a gamble, but the live forecast above shows exactly what Santorini offers right now. For Fira, expect Mediterranean warmth with long summer days and mild winters — a reliable contrast to British unpredictability.
What does the live forecast above mean for your trip?
The live conditions above give you current temperature, wind and cloud cover for Fira, the island’s capital perched on the caldera rim. This data is updated automatically, so check it before packing — especially if you’re travelling in shoulder months when conditions shift quickly. A 22°C afternoon in October feels pleasant, but evening sea breezes can drop it by 8–10°C.
Santorini climate at a glance
Santorini weather month by month
March, April and May – spring transition
March sees average highs of 16°C, with sea temperatures around 15°C – too cool for swimming but ideal for hiking the caldera trails. By April, the thermometer climbs to 19°C, and the chance of rain drops from 8 days in March to 5 in April. Santorini weather April is mild and increasingly sunny, with 9 hours of daily sunshine. May is the real turning point: average highs reach 23°C, sea temperatures hit 19°C, and rain becomes rare (just 2–3 wet days). For many, santorini weather may offers the perfect blend of warmth and quiet crowds.
June, July and August – peak summer heat
June brings 28°C highs and 13 hours of sun; the sea warms to 22°C. July and August are the hottest, with average highs of 30–31°C. Santorini weather august is reliably clear and dry, with sea temperatures peaking at 25°C. The meltemi wind (northerly) often picks up in August, giving some relief from the heat but also making ferry crossings choppy. If you dislike intense heat, aim for June or early September instead.
September, October and November – autumn warmth
September stays warm: highs of 28°C, sea still 24°C, and only 1–2 rainy days. Santorini weather september is a favourite for travellers who want summer conditions without the throngs. October sees a noticeable drop: average highs 23°C, sea 22°C, and 4 rainy days. Weather in Santorini in October is still comfortable for sightseeing, but you’ll need a jacket for evenings. By November, highs fall to 18°C, sea to 19°C, and rain doubles to 8 wet days — the quiet season begins.
December, January and February – mild winter
Winters are mild but damp. December averages 15°C, January 14°C, and February 15°C. Sea temperatures hover around 16°C. Rainfall is highest from December to February (60–75 mm per month), but sunshine still averages 5–6 hours daily. Snow is extremely rare in Fira.
When is the best time to visit Santorini?
For guaranteed heat and swimming, July and August are the safest bets — but you’ll share the island with many others. Santorini weather october and May offer the best compromise: warm enough for outdoor dining and boat trips, with far fewer tourists. April and November are suitable for bargain hunters who don’t mind cooler days and the occasional shower. Check the 10-day forecast before booking to see how conditions are trending.
What to pack for Santorini
In summer (June–September): lightweight clothing, sun hat, SPF 50+, reusable water bottle, and a light cardigan for evenings. For March–May and October: layers are essential — a medium-weight jacket, comfortable walking shoes, and a rain jacket. November–February: warm jumper, waterproof jacket, and sturdy shoes for potentially slippery caldera paths. Don’t forget swimwear any time: hardy visitors brave the sea in winter, though most pools are unheated.
Rainy and quiet seasons
The rainy season runs from November to March, with December and January the wettest. November averages 6 wet days, but showers are usually short. The quiet season (November–March) sees flight and accommodation prices drop significantly; many hotels and restaurants close, so check ahead. For comparison, Crete Weather follows a similar pattern, though Santorini’s thinner soil means rain runs off quickly. If you’re after guaranteed sun, Malta Weather offers slightly higher winter temperatures.
Long-range forecasts: how reliable are they?
Forecasts beyond 10 days give general trends, not exact temperatures. Santorini weather forecast 14 days and santorini weather forecast 30 days are useful for spotting heatwaves or rain spells, but don’t rely on precise numbers. For your travel planning, the UK weather hub can help you compare departure conditions with Santorini’s outlook. A weather in Santorini 10 days forecast is typically accurate enough to pack a bag.
Frequently asked questions
How hot is Santorini in May?
May averages 23°C highs, with sea temperatures around 19°C. Afternoon sun feels warm, but evenings can be cool (14–16°C). You’ll likely swim comfortably by late May. Rain is minimal — typically 2–3 light showers across the whole month.
How hot is Santorini in October?
October sees average highs of 23°C, dropping to 17°C at night. Sea temperatures remain a pleasant 22°C, so swimming is still possible. Expect around 4 rainy days, but most days are sunny. A light jacket is essential after sunset.
How hot is Santorini in April?
April averages 19°C highs and 12°C lows. Sea temperatures hover at 16°C — brisk for most swimmers. Sunshine hours increase to 9 per day, but rain still occurs on about 5 days. It’s ideal for walking and sightseeing, not beach lounging.
How hot is Santorini in November?
November brings average highs of 18°C and lows of 12°C. Sea temperature drops to 19°C. Rain increases to 8 wet days, and wind can be blustery. Outdoor activities are still possible on calm days, but pack a waterproof layer.
