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Sea Temperature in Portoroz in May
© Valentin Ukhov
Complete information on the sea temperature range in the Adriatic Sea in Portoroz in May. Historical daily data. Climate details for May. Tips on swimming conditions and beach relaxation in Portoroz. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Portoroz in May
13°C
MINIMUN
18°C
AVERAGE
23°C
MAXIMUM
Historical Data of Water Temperature in May in Portoroz
Water Temperature Chart for Adriatic Sea in Portoroz in May
Sea Temperature Table in Portoroz in May Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| May 1 | 14°C | 16°C | 15°C | 15.0°C |
| May 2 | 14°C | 16°C | 15°C | 15.3°C |
| May 3 | 15°C | 16°C | 15°C | 15.5°C |
| May 4 | 15°C | 16°C | 15°C | 15.3°C |
| May 5 | 15°C | 17°C | 16°C | 16.0°C |
| May 6 | 15°C | 16°C | 16°C | 15.8°C |
| May 7 | 15°C | 16°C | 16°C | 15.8°C |
| May 8 | 15°C | 16°C | 16°C | 15.8°C |
| May 9 | 16°C | 17°C | 16°C | 16.3°C |
| May 10 | 16°C | 17°C | 16°C | 16.3°C |
| May 11 | 16°C | 17°C | 16°C | 16.3°C |
| May 12 | 16°C | 17°C | 17°C | 16.8°C |
| May 13 | 17°C | 17°C | 17°C | 17.0°C |
| May 14 | 17°C | 18°C | 17°C | 17.5°C |
| May 15 | 18°C | 17°C | 18°C | 17.8°C |
| May 16 | 17°C | 17°C | 18°C | 17.3°C |
| May 17 | 17°C | 18°C | 19°C | 18.0°C |
| May 18 | 17°C | 18°C | 19°C | 17.8°C |
| May 19 | 17°C | 17°C | 19°C | 17.8°C |
| May 20 | 18°C | 17°C | 19°C | 18.0°C |
| May 21 | 18°C | 17°C | 19°C | 18.0°C |
| May 22 | 17°C | 18°C | 19°C | 18.0°C |
| May 23 | 17°C | 18°C | 19°C | 18.3°C |
| May 24 | 18°C | 18°C | 19°C | 18.5°C |
| May 25 | 18°C | 18°C | 19°C | 18.8°C |
| May 26 | 18°C | 18°C | 19°C | 18.8°C |
| May 27 | 17°C | 19°C | 19°C | 18.5°C |
| May 28 | 18°C | 19°C | 19°C | 19.0°C |
| May 29 | 19°C | 19°C | 19°C | 19.3°C |
| May 30 | 19°C | 19°C | 19°C | 19.5°C |
Portoroz Climate and Swimming Opportunities in May
22°C
Average Day Air Temperature
14°C
Average Night Air Temperature
84 mm
Precipitation Amount per Month
11 days
Number of Rainy Days
15 hrs
Daylight
per Day
7 hrs
Sunshine
per Day
8 km/h
Average Wind Speed
68%
Average
humidity
Portoroz lies within the Municipality of Piran in Slovenia. The average daytime temperature in Portoroz in May is 22°C (71°F), while the nighttime average is 14°C (58°F). There are typically 11 rainy days during the month, with a total precipitation of 84 mm (3.3 inches). The daylight duration in May in Portoroz is 15 hours, with an average of 7 hours of sunshine per day. The average wind speed in May is 8 km/h (5 mph), and the humidity level is around 68%.
The water temperature in Portoroz in May ranges from 14°C to 19°C (57°F to 66°F). At the beginning of the month, the average temperature is around 15°C (59°F), shifting to 17°C (63°F) by mid-May and reaching 19°C (66°F) in the last ten days. Overall, the average sea temperature in Portoroz for May is 17°C (63°F). Very comfortable swimming conditions. The water is fresh but not too cold, and the air temperature is pleasant.
Sea Temperature in May in Nearby Cities
Frequently Asked Questions About Water Temperatures in May in Portoroz
What is the sea temperature in Portoroz in May?
The water temperature in the Adriatic Sea in Portoroz in May ranges from 14°C to 19°C (57°F to 66°F).
Is it possible to swim in the Adriatic Sea in Portoroz in May?
The average sea temperature in Portoroz in May is 17°C (63°F), and the air temperature is 22°C (71°F), so very comfortable swimming conditions. The water is fresh but not too cold, and the air temperature is pleasant.