Enjoy a fix of vitamin D at Powell Beach. After you've worked on your tan, stick around and watch the sky change color as the sun begins to set.
You'll have no end of sightseeing choices in Summerland. Powell Beach is a great place to kick off here, but there are lots of other interesting sights to visit. Okanagan Beach, Cascades Casino, and Rotary Park are not far from the stretch of coastline and will round out your day nicely.