This is a summer holiday along the coast, with three historic settings and time by the water. Spend two nights in Herceg Novi for fortress terraces and the promenade, two in Kotor for the medieval town and an inner-bay outing, then one in Budva for a nearby beach and an Old Town evening. The cultural visits and local meals fit inside those days, without extra overnight stops.
Plan walks and any walls climb early, keeping the hotter part of the day for a shaded pause or a swim where conditions suit. July and August are the coast’s busiest months; June or September can offer a different balance of heat and crowds. Confirm both direct buses for your dates and compare the real station-to-room walks. The optional Kamenari–Lepetane foot ferry requires separate transport on both shores and the applicable summer sailing notice. Leave a generous road buffer for the final airport journey, especially during peak holiday traffic.