Greece Santorini Weather in May — Climate Guide
May in Santorini is very-high
Santorini Weather in May — Quick Answer
As of 2026- Avg temp
- 23° / 16°
- Rainfall
- 15mm · 3 days
- Crowds
- Very busy
As of 2026, Santorini in May averages a high of 23°C and low of 16°C with 15mm of rain over about 3 days. Light cotton + sunglasses + light evening layer.
May is very-high for Santorini.
Best month for Santorini — comfortable + pre-cruise season crowds + lower prices than July-August. Greek-island feel.
Travel score
Santorini May Weather Stats
Avg High
23°C
Avg Low
16°C
Rainy Days
3
15mm total
Sunshine
10h
Daily avg
Humidity
60%
moderate
UV Index
7
High
Wind
11 km/h
Gusts 30
Sea Temp
18°C
swimming possible
Crowds
Very busy
At attractions
May Sunrise & Sunset
Air Quality
PM2.5
12 μg/m³
PM10
20 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
23°C
Nighttime
16°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 30 km/h
Activities Recommended for May
May Travel Pros & Cons
Pros
- 23/16°C ideal
- Long daylight 14h
- Caldera cruise season starts
- Cheaper than July-August
Cons
- Hotels rising
- Tourist crowds
May Events & Festivals
- Greek summer begins
- Caldera cruise season starts
Santorini in May — Full Picture
Best month for Santorini — comfortable + pre-cruise season crowds + lower prices than July-August. Greek-island feel.
What to Wear & What to Pack
Light cotton + sunglasses + light evening layer.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current18.7°C
12.7°C
5.7/mo
Summer (Jun·Jul·Aug)
28.3°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 May Hotel Picks
Frequently Asked Questions
Is May a good time to visit Santorini?
Santorini in May is very-high. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Santorini in May?
Santorini May averages a high of 23°C and a low of 16°C.
Does it rain much in Santorini in May?
Santorini May averages 15mm of rainfall over about 3 rainy days.
What should I wear in Santorini in May?
Light cotton + sunglasses + light evening layer.
What time are sunrise and sunset in Santorini in May?
Santorini May sunrise is 06:00 and sunset is 20:00, with 14h of daylight.
What's the air quality like in Santorini in May?
Santorini May air quality (AQI) averages 38, rated Good. PM2.5 averages 12μg/m³.
What activities are recommended in Santorini in May?
In May, Santorini is great for Oia sunset, Akrotiri + Red Beach, Caldera cruise.
Is May peak season in Santorini?
Santorini May crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Santorini
View Other Months
Planning a May trip to Santorini?
You've checked the weather — next come the budget and the route.
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.