Greece Santorini Weather in August — Climate Guide
August in Santorini is very-high
August is very-high for Santorini.
Sea-temp peak 25°C. Assumption Day brings massive Greek domestic tourism. Korean Liberation Day spike.
Travel score
Santorini August Weather Stats
Avg High
29°C
Avg Low
22°C
Rainy Days
0
0mm total
Sunshine
12h
Daily avg
Humidity
52%
dry
UV Index
9
Very high
Wind
17 km/h
Gusts 45
Sea Temp
25°C
swimming peak
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
25 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
30°C
Nighttime
22°C
Humidity and wind affect how the actual temperature feels.
Wind
17 km/h
Max gust 45 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Sea-temp 25°C peak
- Korean Liberation Day usable
Cons
- Crushing crowds continue
- Hotels at peak
- Aug 15 + Liberation Day premium
- 29°C heat
August Events & Festivals
- Assumption Day (Aug 15 — Greek shops close)
- Korean Liberation Day
Santorini in August — Full Picture
Sea-temp peak 25°C. Assumption Day brings massive Greek domestic tourism. Korean Liberation Day spike.
What to Wear & What to Pack
Like July. Sea-temp peak.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
18.7°C
12.7°C
5.7/mo
Summer (Jun·Jul·Aug)
Current28.3°C
21.3°C
0.3/mo
Autumn (Sep·Oct·Nov)
21.7°C
16°C
5/mo
Winter (Dec·Jan·Feb)
14.3°C
9.7°C
10.7/mo
Santorini Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 14° | 9° | 11d·75mm | 4h | 73% | 1 | Quiet | Low season | |
| 14° | 9° | 10d·65mm | 5h | 71% | 2 | Quiet | Low season | |
| 15° | 10° | 8d·55mm | 6h | 70% | 3 | Quiet | Shoulder | |
| April (Best) | 18° | 12° | 6d·30mm | 8h | 65% | 5 | Busy | Peak |
| May (Best) | 23° | 16° | 3d·15mm | 10h | 60% | 7 | Very busy | Peak |
| June (Best) | 27° | 20° | 1d·5mm | 12h | 55% | 9 | Very busy | Peak |
| 29° | 22° | 0d·0mm | 13h | 50% | 10 | Very busy | Peak | |
| 29° | 22° | 0d·0mm | 12h | 52% | 9 | Very busy | Peak | |
| September (Best) | 25° | 19° | 2d·15mm | 10h | 60% | 7 | Very busy | Peak |
| October (Best) | 22° | 16° | 5d·50mm | 7h | 65% | 4 | Busy | Shoulder |
| 18° | 13° | 8d·65mm | 5h | 70% | 3 | Quiet | Shoulder | |
| 15° | 11° | 11d·75mm | 4h | 73% | 2 | Quiet | Low season |
View Other Months
Santorini August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Santorini?
Santorini in August is very-high. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Santorini in August?
Santorini August averages a high of 29°C and a low of 22°C.
Does it rain much in Santorini in August?
Santorini August averages 0mm of rainfall over about 0 rainy days.
What should I wear in Santorini in August?
Like July. Sea-temp peak.
What time are sunrise and sunset in Santorini in August?
Santorini August sunrise is 06:30 and sunset is 20:00, with 13h 30min of daylight.
What's the air quality like in Santorini in August?
Santorini August air quality (AQI) averages 42, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in Santorini in August?
In August, Santorini is great for Caldera cruise, Beach days, Hotel pool.
Is August peak season in Santorini?
Santorini August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Santorini
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.