Santorini Sea Temperature
Greece · Updated hourly from satellite and marine data
Current Sea Temperature
22.9°C
Comfortable for snorkeling
Sea Surface Temperature Over the Year
Sea surface temperature in Santorini ranges from about 17.3°C in March to 24.2°C in September. The water is warmest in late summer and coolest in winter.
Over the past 30 days, the average sea temperature in Santorini has been 22.4°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| Sep | — | — | — |
| Oct | 23.5°C | 24.2°C | 25.2°C |
| Nov | 22.0°C | 22.5°C | 24.3°C |
| Dec | 20.2°C | 21.3°C | 22.1°C |
| Jan | 19.0°C | 19.7°C | 20.5°C |
| Feb | 17.5°C | 18.2°C | 19.0°C |
| Mar | 17.2°C | 17.5°C | 17.8°C |
| Apr | 17.1°C | 17.3°C | 17.8°C |
| May | 17.1°C | 17.6°C | 19.2°C |
| Jun | 17.6°C | 19.4°C | 22.2°C |
Based on recent forecast data collected for Santorini.
Santorini Water Temperature — Common Questions
What is the sea temperature in Santorini today?
The current sea surface temperature in Santorini is 22.9°C. Over the last 30 days, the average has been 22.4°C.
When is the water warmest in Santorini?
The warmest sea temperatures in Santorini occur in September, averaging around 24.2°C. Late summer typically brings the warmest water, ideal for snorkeling without a wetsuit.
When is the water coldest in Santorini?
The coldest sea temperatures are in March, averaging around 17.3°C. A wetsuit is recommended during this time.
Can you swim in Santorini today?
Yes — at 22.9°C the water is warm enough for comfortable swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Santorini.
View Snorkel Forecast →