April weather forecast
Koper, Slovenia

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Weather in April

The month of April in Koper speaks volumes about the inspirational transition seasons offer. A comforting warmth diffuses into the sea, with the temperature rising to 13.1°C (55.6°F). April presents longer daylight hours, complementing the rebirth of flora dispelled by the winter frost. Outdoor activities surge in popularity as Koper's beauty unfolds. The city's physical and social landscapes echo this revitalization, cherishing the spring's arrival.

Sea temperature

In Koper, in April, the average water temperature is 13.1°C (55.6°F).
Note: Beware when you're in 13.1°C (55.6°F) waters; 13°C (55.4°F) is chilling and anything below 10°C (50°F) could cause breathing hindrance and a sudden cold shock, given your physical condition.

Daylight

In Koper, Slovenia, the average length of the day in April is 13h and 32min.
On the first day of the month, sunrise is at 06:44 and sunset at 19:33. On the last day of April, in Koper, sunrise is at 05:53 and sunset at 20:10 CEST.
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Frequently asked questions

What is the water temperature in April in Koper?

In Koper, Slovenia, in April, the average water temperature is 13.1°C (55.6°F). Swimming in 13.1°C (55.6°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in April in Koper?

In April, the average day length in Koper is 13h and 32min.

When are sunrise and sunset in April in Koper?

In April, on the first day of the month, sunrise is at 06:44 and sunset at 19:33. On the last day of the month, in Koper, sunrise is at 05:53 and sunset at 20:10 CEST.

Average sea temperature in April
Koper, Slovenia

Average sea temperature in April - Koper, Slovenia
  • Average sea temperature in April: 13.1°C

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 in April
Koper, Slovenia

Average daylight in April - Koper, Slovenia
  • Average daylight in April: 13h and 3min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

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Koper, Slovenia

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