May weather forecast
Koper, Slovenia

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Weather in May

May ushers in the advent of summer in Koper. The thermal transition deepens as the sea water warms up to a pleasant 18°C (64.4°F). The illuminating sunshine permeates the days for longer durations, creating a harmonious blend of warmth and light. Seafront activities increase in momentum as locals and tourists bask in the city's notable transformation. It truly marks the onset of an enjoyable season in Koper.

Sea temperature

In Koper, in May, the average water temperature is 18°C (64.4°F).
Note: When the surface water temperature is 18°C (64.4°F), most do not enjoy swimming. Breathing control becomes more complex as temperatures drop below 21°C (69.8°F).

Daylight

In Koper, the average length of the day in May is 14h and 55min.
On the first day of May in Koper, sunrise is at 05:52 and sunset at 20:12. On the last day of the month, sunrise is at 05:19 and sunset at 20:45 CEST.
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Frequently asked questions

What is the sea water temperature in May in Koper?

In Koper, the average seawater temperature in May is 18°C (64.4°F). 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).

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

In Koper, the average day length in May is 14h and 55min.

When are sunrise and sunset in May in Koper?

In May, on the first day of the month, sunrise is at 05:52 and sunset at 20:12. On the last day of the month, sunrise is at 05:19 and sunset at 20:45 CEST.

Average sea temperature in May
Koper, Slovenia

Average sea temperature in May - Koper, Slovenia
  • Average sea temperature in May: 18°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 May
Koper, Slovenia

Average daylight in May - Koper, Slovenia
  • Average daylight in May: 14h and 5min

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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