Rovinj is the prettiest town in Istria and the easiest day trip from Pula, because the bus does it without a car. It is also noticeably more expensive than Pula, so go for the wandering and the dinner, not for a bargain. You can do the old town and be back the same evening.
The bus
The bus from Pula to Rovinj runs 30 to 40 minutes and costs from about €7, with more than 20 departures a day in season between Arriva, FlixBus and local operators. Buy a day ahead in August and go early: by 11am in high summer the old town is a slow-moving queue, and an early bus means a parking-free, calm morning. The getting to and around Pula guide has the station detail.
The old town and the hill church
Rovinj is built on a round peninsula, Venetian, with cobbles polished to glass and lanes that dead-end into the water. The church on the hill, St Euphemia, is the landmark and the climb to it gives the best view over the islands. The rest is wandering, galleries in fishermen’s houses, and harbour-side coffee. It is a town to walk slowly, not to tick off.
Sunset at the Valentino rocks
The rocks below the Valentino bar, on the south side of the old town, are the classic Rovinj sunset spot: sit on the flat stone, the water either side, and the town turning gold. Get there before the light goes, because the rocks fill up. It is free and the best seat in the region for the hour.
The honest pricing
Rovinj costs more than Pula for the same coffee, the same fish, the same room. That is the trade for the looks, and most visitors decide it is worth a day. Keep the big spend to one dinner and the rest simple, and the trip stays good value. The Istria travel guide covers the wider region, and the day trips from Pula guide lists the other options. If you are weighing the two as a base rather than a day trip, our Pula vs Rovinj comparison makes the call.