Piran Sea Temperature

Updated Wed 11:45 (Europe/Ljubljana)

Slovenia · Forecast updated Aug 12, 2026, 11:45 UTC

Current Sea Temperature

27.3°C

81.1°F

Warm water

Versus this month's average

0.7°C below

The August average in our archive is 28.0°C (82.4°F).

Recent trend

Warming by 0.3°C

Seven-day average: 28.3°C, versus 28.0°C in the prior seven days.

What to wear

Warm water

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

Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions.

Sea Surface Temperature Over the Year

In the data collected for Piran, monthly averages range from about 24.6°C (76.3°F) in June to 28.0°C (82.4°F) in August.

Over the past 30 days, the average sea temperature in Piran has been 27.4°C.

Northern Hemisphere. Summer is generally June–August; winter is December–February.

Month	Min	Average	Max
June	21.5°C / 70.7°F	24.6°C / 76.3°F	28.5°C / 83.3°F
July	24.7°C / 76.5°F	26.8°C / 80.3°F	28.9°C / 84.0°F
August	26.5°C / 79.7°F	28.0°C / 82.4°F	29.6°C / 85.3°F

Profile calculated from 1748 hourly forecast records across 3 monthly periods. This is a growing archive, not a long-term climate normal.

Adriatic town with the Strunjan nature reserve's clear, sheltered shallows.

The current sea surface temperature in Piran is 27.3°C. Over the last 30 days, the average has been 27.4°C.

The warmest monthly average in the Piran archive is August, at around 28.0°C (82.4°F).

The coldest monthly average in the archive is June, at around 24.6°C (76.3°F).

At 27.3°C, the water is usually comfortable for swimming and snorkeling.

See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Piran.