I will be driving a rental car from Rovinj, Croatia to Kobarid, Slovenia in mid September (on a Wednesday). I recently purchased tickets for the Skocjan Caves for a 10:00am tour to do on the way. How much time do I need to allow for crossing the border?
You will be within the Schengen Area, so there will not be checks for a border crossing. I would check with the rental agency to ensure there are no restrictions taking the car from one country to the next. I believe Slovenia will require a vignette.
There is temporary border control in effect. It was going to expire but they extended it. Not sure if they will again. Which I guess means checking passports?? Which could lead to lines at the border?? Does anyone know. Here is the link: https://www.gov.si/en/registries/projects/zacasni-nadzor-na-notranji-meji/
Temporary border controls set to expire June 22, 2024. https://www.gov.si/en/news/2023-12-18-internal-border-checks-extended-until-june-2024/