Ke’e Beach is at the end of the road on the north shore of Kaua’i. It is one of the most scenic beaches in Hawaii (or anywhere really). The beach itself is tucked in behind a reef and is protected from wind as well by the point. If you walk out to the point you can see all the way down the Napali Coast.
The beach stretches all the way back to Haena but the swimming area is not very large. If you are going you should get there early. If you arrive late you may have to park a mile or two away.
The park is also the start of the Kalalau Trail. If you are in good shape you can make the 4-mile round trip hike to Hanakapiai in a half-day and hang out at the beach when you get back.