May 21 is statistically one of the best days of the year in Crete. With minimal rain risk (14%) and pleasant highs of 19°C, it's ideal for outdoor adventures. It's a lively time to explore Crete, with most attractions operating at full capacity.
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Essential Travel Info for Crete
Currency
EUR
€ Euro
Language
Greek
Driving
Right side
Safety
High Safety
GPI: 1.838
Crete Weather Forecast for May 21
"Mild & Comfortable. Expect average highs of 18.9°C. 14% chance of rain."
What to Wear in Crete in May
Based on historical data for May 21, Crete typically experiences temperatures between 10°C and 18.9°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (14% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Crete
Smart Suitcase
- Light Jacket
- Long Pants
Average High
18.9°C
Daytime Peak
Average Low
10°C
Nighttime Low
Feels Like
18.9°C
🌤️ Feels accurate
Rain Chance
14%
Avg 0.4mm if it rains
Cloud Cover
33%
Overcast
Pressure
1014.6 hPa
Low volatility
Crete Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 50+, limit exposure 10am-4pm
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 10 min to burn
Type III-IV
🟡 15 min to burn
Type V-VI
🟢 25 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
9.4°C
Dry air
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Greece
Flight Traffic
Busy
71/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~101
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Crete
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:14
☀️ Noon
12:18
🌇 Sunset
19:23
⏱️ Daylight
14h 9m
Wind Speed
9.9 km/h
Light breeze
Sunshine
12.1 hrs
Direct Sun (Cloud-free)
Humidity
54%
Comfortable
Travel Intelligence
Exclusive flight analytics & health data for Crete
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Crete
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 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, Crete on May 21 averages 18.9°C with a 14% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Crete Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (May 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Crete Worth Visiting on May 21?
Planning a trip to Crete on May 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 18.9°C with a 14% historical precipitation risk.
✈️ Travel Logistics: Approximately 101 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 20.7°C (refreshing tonic). Wave conditions are generally fun waves with heights around 0.56m.
📊 Historical Extremes: The hottest May 21 recorded in the last 30 years saw temperatures hit 28.1°C in 2024, while the coldest dropped to 4.4°C in 2022.