Climate and monthly weather forecast
Piran, Slovenia

Weather in January

In January, the average sea temperature in Piran, Slovenia, is 10.3°C (50.5°F). Note: Swimming in 10.3°C (50.5°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique. Weather in January »

Weather in February

The month with the coldest seawater in Piran, Slovenia, is February, with an average sea temperature of 9.3°C (48.7°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in February »

Weather in March

In March, the average sea temperature in Piran, Slovenia, is 10.1°C (50.2°F). Note: Swimming in 10.1°C (50.2°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in March »

Weather in April

In Piran, Slovenia, in April, the average water temperature is 13.1°C (55.6°F). Note: Swimming in 13.1°C (55.6°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique. Weather in April »

Weather in May

In Piran, Slovenia, the average seawater temperature in May is 18°C (64.4°F). Note: Swimming in 18°C (64.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F). Weather in May »

Weather in June

In June, the average sea temperature in Piran, Slovenia, is 22.8°C (73°F). Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 22.8°C (73°F) water. Weather in June »

Weather in July

July and August, with an average sea temperature of 24.8°C (76.6°F), are months with the warmest seawater in Piran, Slovenia. Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. Weather in July »

Weather in August

July and August, with an average sea temperature of 24.8°C (76.6°F), are months with the warmest seawater in Piran, Slovenia. Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.8°C (76.6°F) water. Weather in August »

Weather in September

In Piran, Slovenia, in September, the average water temperature is 23.3°C (73.9°F). Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 23.3°C (73.9°F) water may be enjoyable. Weather in September »

Weather in October

In October, the average sea temperature in Piran, Slovenia, is 19°C (66.2°F). Note: For most, swimming in 19°C (66.2°F) is not an enjoyable activity. Weather in October »

Weather in November

In November, the average sea temperature in Piran, Slovenia, is 16.1°C (61°F). Note: For swimming, a surface water temperature of 16.1°C (61°F) is not enjoyable for the majority. Weather in November »

Weather in December

In December, the average sea temperature in Piran, Slovenia, is 13.2°C (55.8°F). Note: Swimming in 13.2°C (55.8°F) is considered life-threatening. Weather in December »
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FAQ

What is the month with the coldest sea water in Piran?

The month with the coldest seawater in Piran is February, with an average sea temperature of 9.3°C (48.7°F).

When is Daylight Saving Time (DST) in Piran?

On Sunday, 27. March 2022, at 02:00, Daylight Saving Time starts in Piran, and the time zone changes from CET to CEST. Daylight Saving Time ends on Sunday, 30. October 2022, at 03:00, and the time zone reverts from CEST to CET.

When are the longest days in Piran?

June has the longest days of the year, with an average of 15h and 38min of daylight.

What are the months with the warmest sea water in Piran?

July and August, with an average sea temperature of 24.8°C (76.6°F), are months with the warmest seawater.

What is the month with the shortest days in Piran?

The month with the shortest days is December, with an average of 8h and 47min of daylight.

Average sea temperature
Piran, Slovenia

Average sea temperature - Piran, Slovenia

The best months for swimming (with the highest average sea temperature) are July and August (24.8°C).
The coldest month (with the lowest average sea temperature) is February (9.3°C).

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Average daylight
Piran, Slovenia

Average daylight - Piran, Slovenia

The month with the longest days is June (Average daylight: 15h and 38min).
The month with the shortest days is December (Average daylight: 8h and 47min).

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