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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