☀️ Yes! Average temperature: 21°C
It's mild at 21°C — warm enough for sightseeing but you may want a light layer for evenings. Santorini in May has an average air temperature of 21°C with sea temperatures around 20°C. You can expect 11 hours of sunshine per day and 10mm of rainfall, which means virtually no rain — bone-dry conditions.
The sea is 20°C — refreshing but swimmable, especially on sunny days. With 11 hours of daily sunshine, there's plenty of time to enjoy outdoor activities. Pack light layers, a jumper for evenings, comfortable walking shoes, and a rain jacket.
Santorini offers mild weather in May — great for culture and sightseeing. The average flight time from the UK is comfortable and there are usually good deals available for this time of year.
Here's how Santorini stacks up against similar destinations in May:
| Destination | Air °C | Sea °C | Rain | Sun |
|---|---|---|---|---|
| Santorini | 21°C | 20°C | 10mm | 11h |
| Corfu | 21°C | 19°C | 30mm | 9h |
| Malta | 21°C | 19°C | 10mm | 10h |
| Mykonos | 21°C | 19°C | 10mm | 11h |
| Algarve | 22°C | 18°C | 15mm | 10h |
| Alicante | 20°C | 19°C | 25mm | 10h |
See how Santorini's temperature changes throughout the year:
Looking for somewhere warm in May? These destinations are all 25°C+:
Yes, Santorini in May has average temperatures of 21°C, making it a warm destination. Sea temperatures are 20°C.
The sea at 20°C is refreshing but swimmable.
Pack light layers, a jumper for evenings, comfortable walking shoes, and a rain jacket.
May is decent for visiting Santorini — not too hot, good for sightseeing.
Compare temperatures, sea conditions & sunshine for 70+ destinations worldwide
Explore All Destinations →