Year around there is bus from Munich to Crikvenica in Kvarner, the travel time with bus is about 8 hours. In Munich to bus departure from the ZOB am Hackerbrucke, more info here. In Crikvenica passengers are dropped of at the bus station which is located in the centre of town, next to the Sea. Return tickets are discounted so if you plan to travel back to Munich from Crikvenica, you should buy such a ticket. From Crikvenica, you can continue your travel by local bus, to smaller holiday destinations in the area.