This week's beach of the week on Total Korčula is Three Ports, not one beach, but a wonderful, beach-goer friendly set of coves near Vela Luka.
It's name in Croatian is Tri Luke, but you'll also often hear the Italian name (appropriatelly similar to the English name) Tre Porte. It's a series of - and I know this is going to be hard to believe - of three coves, located several kilometres due South-West of Vela Luka, facing south and located in one of the most amazing wooded areas of Korčula Island.
The road to get to the Three Ports from Vela Luka is quite nice, easy to find (go towards Potirna and then it's really simple to find the Ports), and once you get to your destination, you shouldn't have too much problems finding a parking spot for your car, as the area is quite wide, there are houses and apartments in the ports and several smaller roads in the forest which accomodate parking - and in the shade.
There are several smaller pebble beaches in each of the coves (and even hidden sandy gems!), and numerous rocky slabs around the coves where you can put your stuff and enjoy a bit more isolation, both in the sun or in the shade. If you're visiting for the first time, the best advice we can give you is to walk around a bit, explore the area, enjoy the different options, take a swim here or there before you decide where you want to spend most of your time. As we said already, there are several houses located in the area, and most of them are renting apartments, so if you want to keep away from busy Vela Luka, but still be close, maybe you can consider renting here.
At almost any given time during summer, there will be boats, small or larger, docked in or just in front of the coves, as the water is perfectly clear and quite shallow there, there are several charming little islets in front of the Tre Porte, which are very intersting to the nautical tourists. Plus, there's a diving centre located in the area, so there will be divers - and you can also be one!
There is only one konoba, restaurant called Škanja Rat is located very close to the coves, but works only in the afternoons (such was the situation last time I visited; I don't know if things have changed since, as there isn't much information about the place online), so you can have a drink and a meal there.