Month-specific sea-surface temperature · Slovenia

Piran Sea Temperature in August

26.2°C

79.2°F

In August, sea-surface temperature near Piran has a historical monthly average of 26.2°C. This is not the reading for any particular holiday date.

Across 2023–2025, the lowest and highest yearly August monthly means were 25.1–27.4°C. These are not daily extremes.

Previous month

July · 26.1°C

Change into August: +0.1°C

Next month

September · 24.1°C

Change into next month: -2.1°C

Can you swim or snorkel in Piran in August?

At 26.2°C our temperature-only guide describes the water as warm water. Comfort depends on your cold tolerance, immersion time and wind. A historical average cannot determine whether conditions are safe on any given day.

Do you need a wetsuit?

Most people are comfortable in swimwear or a light rash guard.

Which beach should you choose?

Look for a beach sheltered from the actual forecast waves and wind on your visit. Exposure, currents and entry conditions vary even where water temperatures are similar. Follow local warnings.

Check the current waves, wind and snorkeling forecast →

A live forecast does not predict a future August. Check again close to your trip.

Piran Sea Temperature: All 12 Months

Choose a month for available historical evidence, month comparisons and swim guidance. Missing history is clearly marked and never presented as a long-term normal.

January 12.3°C February 11.4°C March 11.8°C April 14.2°C May 18.1°C June 23.3°C July 26.1°C August 26.2°C September 24.1°C October 20.7°C November 17.4°C December 14.0°C

Data source and limitations

Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature; 2023–2025. Marine model grid near 45.53, 13.57. Based on 3 yearly monthly means and 2232 recorded samples. Source methodology.

Modelled sea-surface temperatures do not establish underwater visibility, wildlife, calm currents or safe entry.