Hi returned from Istria in June we were staying in Porec for a week. There are no actual sandy beaches anywhere that we could find, We only found sunbathing platforms and a couple of small area's of shingle. The water is clear but rocky beach shoes will be required if you intend going into the sea. They can be purchased at the local shops. The sunbeds on the bathing platforms are chargable, charges vary depending on the type of bed you use range from 40kn upwards per bed (appx £4.50 each).
The country is beautiful, and very scenic, we found there was not enough for us to do in Porec and so hired a car for a couple of days cost £38.00 per day no discount for subsequent days hire, petrol about £1.25 per ltr, we tavelled around the area up towards the border and across to the Opatija via the villages, you will need to pay tolls and parking; some of the parking is done by meters so change will be required. We did not go to Medulin although alot of the areas we did go to were very similar. Lots of people offering boat trips albeit to the same places about 160kn - 180kn each (about £18.00.)
Eating out is cheap about £15-£20 and of good quality, the food has a German/Italian influences, lots of fish, seafood, pizza and pasta as well as grilled meats, restaurant prices tend to be very similar. Lots of italian style icecream we paid 12kn for 2 cones which is about £1.25, large icecream sundaes in restaurants and cafes are priced from appx 35kn - 45kn each definitely worth doing. (NB Tost is a cheese and ham toastie) drinks beer is priced at appx 17 - 20kn for a large beer 0.5L and coke is priced at 20-25kn. They do a lemon beer which is nice and refreshing does not really taste of beer either. The whole area has Italian influences, but is cheaper than Italy. English is widely spoken. Pula has a large ampitheatre similar to the one in Rome, Rovinj is also worthwhile going to as it Opatija. Flat comfortable shoes are a must, if you need heels then take wedges, leave heels at home as many if the towns have cobbles which are very smooth and slippery. Hotels expect gents to wear long trousers in the evening and they did not like people to wear swimwear in the mornings at breakfast or at lunchtimes.
Evening entertainment was old style, some singers and a bit of folklore which was nice to see.
We found many bars in the evening where we were closed early, the hotel bar also closed at midnight, we hired a fridge for our room and bought some drinks for later in the evenings and early in the morning. price for fridge and safe box for a week was £35.00. Many hotels do not have kettles in the room so if you want an early morning cuppa take a travel kettle with you, a cork screw and bottle opener would also be worthwhile. Other things to do in the area, several underground caves, various churches and old historical hillside villages with views to die for, it's more of a sight seeing style holiday than a beach one, with lots of cafes and bars to get a drink/snack and people watch. People were generally friendly average age where we stayed was about 60-65. If booking on trips with Thompson check how long you will get at the place you are visiting and how long it take to get there as some tours you were on the bus for 3+ hrs each way.