August in Santorini averages highs of 28 °C (82 °F) and lows of 23 °C (74 °F), with almost no rainy days and 13 h 32 min of daylight. The sea is warm, around 26 °C (79 °F).
August weather in Santorini at a glance
average high to low each dot ≈ 3 rainy days
Is August a good time to visit Santorini?
Great time to go: comfortably warm and fairly dry. August is usually high season in Santorini: book rooms early, as prices are typically at their highest.
Our rule: a month scores 2 points for comfortable average highs of 18–28 °C (1 point for 14–18 or 28–32 °C) and 2 points for 5 or fewer rainy days (1 point for 6–10). Average highs above 35 °C or below 8 °C make it a tough month whatever the rain. A rainy day here means 2 mm of rain or more. 4 points = great, 3 = good, 2 = mixed, 0–1 = tough.
Holidays and events in August 2026
- Sat 15 Aug: Assumption Day (Κοίμηση της Θεοτόκου) public holiday
Banks and many shops close on public holidays, and museums may change their hours, so check before you go.
Things to do in Santorini in August
August's weather suits a mix of outdoor sights and museums, so the open-air ones come first.
- Oia sunset — arrive an hour early outdoors
- Fira to Oia caldera walk — about 10 km, best in cool months outdoors
- Red Beach and Perissa — black and red volcanic sand outdoors
- Caldera boat trip — volcano and hot springs outdoors
- Akrotiri — Bronze Age town under ash indoors
- Wineries — Assyrtiko tastings indoors
- Beach and swimming — the sea averages 26 °C (79 °F) in August. outdoors
Where to stay: Fira for transport and value; Oia or Imerovigli for caldera views; Kamari or Perissa for beaches.
What to pack for Santorini in August
- Summer clothes, sunglasses and sunscreen.
- Swimwear.
- Comfortable walking shoes.
What a day in Santorini costs
| Budget traveller | Mid-range | |
|---|---|---|
| Typical total per person, per day | €60–170 | €250–680 |
Excluding flights. August is usually high season in Santorini: book rooms early, as prices are typically at their highest.
August in nearby cities
| City | High / low | Rainy days | Verdict |
|---|---|---|---|
| Athens | 33° / 23° | 1 | Mixed weather |
| Istanbul | 29° / 22° | 2 | Good time to go |
| Cairo | 38° / 24° | 0 | Tough month |
Plan your Santorini trip
- Is Santorini Expensive? Real Costs and a 2026 Budget Guide
- How to Choose an AI Trip Planner in 2026 — 7 Things That Actually Matter
- Best Time to Visit Greece: Month-by-Month Guide 2026
Want the whole trip planned? Join the Journey waitlist: tell it where, when and your budget, and it plans every day hour by hour.
FAQ
Is August a good time to visit Santorini?
By the numbers, August is a great time to go: comfortably warm and fairly dry, with average highs of 28 °C (82 °F) and almost no rainy days. August is usually high season in Santorini: book rooms early, as prices are typically at their highest. The best months for weather are May, September, October.
How warm is Santorini in August?
Average highs are 28 °C (82 °F) and lows 23 °C (74 °F) (2015–2024 averages). The sea is warm, around 26 °C (79 °F).
Does it rain a lot in Santorini in August?
Expect about 0 days with 2 mm of rain or more, about 2 mm in total. It is the 2nd driest month of the year in Santorini.
Sources: climate averages from Open-Meteo historical weather (ERA5 reanalysis, 2015–2024); sea temperatures from the Open-Meteo marine API (2023–2024); public holidays from Nager.Date. Daylight is calculated for the 15th of the month. Averages are a guide, not a forecast. Costs are typical ranges per person per day, excluding flights.