August 20 is statistically one of the best days of the year in Santorini. With minimal rain risk (0%) and pleasant highs of 28°C, it's ideal for outdoor adventures. Expect a bustling atmosphere in Santorini right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Santorini
Currency
EUR
€ Euro
Language
Greek
Driving
Right side
Connect
There are some local radio stations in S...
Safety
High Safety
GPI: 1.838
Santorini Weather Forecast for August 20
"Warm & Sunny. Expect average highs of 27.7°C. 0% chance of rain."
What to Wear in Santorini in August
Based on historical data for August 20, Santorini typically experiences temperatures between 23.8°C and 27.7°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (0% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Santorini
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
27.7°C
Daytime Peak
Average Low
23.8°C
Nighttime Low
Feels Like
30°C
🔥 Feels warmer
Rain Chance
0%
Avg 0mm if it rains
Cloud Cover
2%
Clear sky
Pressure
1009.7 hPa
Low volatility
Santorini Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 100% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30+ required, seek shade
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 11 min to burn
Type III-IV
🟡 17 min to burn
Type V-VI
🟢 28 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21.5°C
Humid/Sticky
Heat Index
30°C
Feels hotter
😐 Best outdoor time:
Any time during daylight hours
Marine Conditions
Jellyfish Warning
High water temps may attract jellyfish swarms.
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Greece
Flight Traffic
High
98/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~48
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Santorini
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:41
☀️ Noon
12:23
🌇 Sunset
19:05
⏱️ Daylight
13h 23m
Wind Speed
30.3 km/h
Fresh breeze
Sunshine
12.5 hrs
Direct Sun (Cloud-free)
Humidity
69%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Santorini
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Santorini
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Active seismic zone. Multiple earthquakes per year.
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Santorini on August 20 averages 27.7°C with a 0% precipitation probability. Wedding/Outdoor Event Score: 90/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Santorini Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
August 14
27.5°C • 0% rain
Score
95
August 15
27.5°C • 0% rain
Score
95
August 27
27.2°C • 1% rain
Score
95
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 20) in other destinations
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📍 Is Santorini Worth Visiting on August 20?
Planning a trip to Santorini on August 20? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 27.7°C with a 0% historical precipitation risk.
✈️ Travel Logistics: Approximately 48 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 6 vaccinations are recommended for Greece, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 26°C (tropical bath). Wave conditions are generally fun waves with heights around 0.75m.
📊 Historical Extremes: The hottest August 20 recorded in the last 30 years saw temperatures hit 31.6°C in 2024, while the coldest dropped to 22.7°C in 2019.