Koper, Slovenia’s only major port city, sits on the short stretch of Adriatic coastline the country has, and receives around 1,000 mm (about 39 inches) of rain a year, with a Mediterranean-influenced climate bringing the heaviest rain in autumn and a drier summer. Intense autumn storms moving in off the Adriatic can bring torrential short-term rainfall, sometimes causing coastal and urban flooding in the low-lying port area. As Slovenia’s main maritime gateway, sudden weather shifts here carry real operational significance for shipping. Because the coast introduces a genuinely different weather dynamic than Slovenia’s Alpine interior, radar tracking of approaching Adriatic storms is a valuable practical tool. Slovenia’s ARSO operates the national radar network.
Learn more: Hurricane Season Radar Guide · Open the full Rain Map