Best Beaches in Croatia in September These are the best beaches in Croatia in September, based on average sunshine, sea temperature, rainfall and temperature. There’s different weather around Croatia, but the Dalmatian Coast’s popular Dubrovnik enjoys an average high temperature of 24ºC in September. Days in September start becoming shorter and shorter so the amount of sunlight goes down as well which directly affects the drop of air temperatures. The summer madness is over, the weather is still warm but visitors are down to a more manageable level. You’ll spend the days in shorts and t-shirts, but you should bring some warmer things for the evenings as temperatures fall to 13ºC at night. The summer months are the best time to visit Croatia for a sailing holiday with blissfully sunny days perfect for taking in the sights at each port of call, and ideal water temperatures for swimming, snorkelling and trying out some fun watersports. Average Precipitation for Croatia in September The tables below give monthly averages for rainfall during September at cities in Croatia. Get the monthly weather forecast for Dubrovnik, Dubrovnik-Neretva, Croatia, including daily high/low, historical averages, to help you plan ahead. Average September Temperatures (Celsius) Weather in Croatia in September: Precipitation in September. The sea will still be warm enough for swimming and the beaches wonderful for soaking up the sun. The 20th Split Film Festival – an international festival of new film – will be taking place in Croatia’s second city from the 12th to 19th September.. Dubrovnik weather in September 2021. Get the latest coronavirus (COVID-19) updates for Croatia with current travel advice, statistics and online resources. I have re-scheduled our trip for this September. Weather ☀ ⛅ Croatia ☀ ⛅ September ☀ ⛅ Information on temperature, sunshine hours, water temperature & rainfall in September for Croatia. Korcula is the location of the 4th Korkyra Baroque Festival, 5th to 12th September.. The 9th Gioistra Festival will take place in Porec, 9th to 11th September 2015. Though many factors can come into play when choosing your beach destination, the beach weather will often be a deciding factor. Croatia’s coast and islands enjoy hot, dry summers and mild, moderately wet winters. In short, September is an ideal month to travel to Croatia. Croatia Weather in September: While early September is likely to continue the summer weather, as it progresses, conditions become much more pleasant and the biggest crowds of the year begin to diminish. Each place has a total for how many days of wet weather it usually gets this month and for the normal amount of precipitation. We leave the U.S. on September 3 and return September 17. Hi Everyone, We were supposed to visit Croatia and Slovenia this past April/May, but I had to cancel for medical reasons.