What is the weather like in Koper right now?
It is currently 20°C in Koper with cloudy. It feels like 20°C, humidity is 66% and the wind is S 5 km/h.
Today (Sunday) reaches a maximum of 22°C and a minimum of 14°C, with 0.5 mm of rain and 9.3 hours of sunshine. Sunrise is at 07:15 and sunset at 18:27.
Koper weather tomorrow
Tomorrow (Monday) the maximum temperature in Koper is 20°C and the minimum 12°C. Around 0.4 mm of rain is expected with 9 hours of sunshine, and the chance of rain is 40%. The data is refreshed several times a day through Open-Meteo.
Koper weather this week and next week
Over the coming week the average maximum temperature in Koper sits around 21°C and the average minimum around 12°C. Roughly 0.9 mm of rain is expected, spread across 0 days, with 2 largely sunny days.
The warmest day in the 14 day forecast for Koper is Friday 16 Oct at 24°C. The coldest night falls on Tuesday 13 Oct at 9°C. Click any day for hourly detail.
Rain, sunshine and UV in Koper
A daily rainfall total says little on its own: the same 5 mm can be one short downpour or a grey day of drizzle, which is why the hourly chart above is often the more useful of the two. Over the next fortnight the highest UV index for Koper is 4, which is low to moderate.
How reliable is a 14 day forecast?
The first three to five days are generally very accurate. After that the certainty drops off and it is better read as a trend than as an exact daily prediction. Our data comes from Open-Meteo, which combines national weather models — among them the Met Office, DWD and ECMWF — and recomputes them several times a day using measurements from stations worldwide.
Forecast for Koper last updated: 11 October 2026 at 18:45. See also all Slovenia forecasts and the European weather map.