Greece
Santorini in May: weather, sea & travel advice
This month's data profile
Strong month under the current formula
Santorini in May is climatically well suited to city breaks, active holidays and hiking, beach holidays and family holidays. The average daily high is around 21 °C, and the sea is about 19 °C. With about 3 rainy days it is dry.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
80/100 · #6
Warmth
#6
Dryness
#5
Sun
#3
Sea warmth
#7
Published best categories: City break, Active
Santorini · MayPhoto: Carl Rottmann · PDM-ownerClimate facts
- Average high
- 21 °C
- Average low
- 18 °C
- Sea
- 19 °C
- Rainy days (est.)
- 3 rainy days (est.)
- Sun (est.)
- 9 h/day
- Humidity
- 77 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| April | 17 | 15 | 5 | 25 | 7.4 | 76 | 4.9 | 17 | 66 |
| May (selected) | 21 | 18 | 3 | 17 | 8.7 | 77 | 4.2 | 19 | 80 |
| June | 25 | 22 | 1 | 5 | 9.8 | 74 | 4.5 | 22 | 91 |
How do the previous and next months compare?
Baseline: May (80/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| April | -14 | -3.3 °C | -2.9 °C | +1.7 | +8.6 mm | -1.3 h | -0.4 % | +0.8 m/s | -2 °C |
| June | +11 | +3.9 °C | +3.6 °C | -2.3 | -12.1 mm | +1.1 h | -2.9 % | +0.3 m/s | +3.1 °C |
All twelve months in context
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Frequently asked questions
How warm is Santorini in May?
The average daily high is around 21 °C, with an average daily low of about 18 °C.
Can you swim in Santorini in May?
The sea is about 19 °C (refreshing).
Does it rain a lot in Santorini in May?
The curated estimate is about 3 rainy days per month, not a directly measured long-term average. Total precipitation averages around 17 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Santorini?
By the climate score, June, July, August and September are the strongest months for Santorini. For a beach trip: June, July, August and September. May is not among them.