There is quite a lot of beach here at South Beach, and it is growing every day too, so you can expect it to be here a while.
Therefore, you will find people doing all the standard beach activities here:
Relaxing on the Sand
Walking along the Beach
Playing in the Ocean Waves
Playing in the Sand
Building Sand Castles
The one thing that is different here as opposed to most other beaches you may be familiar with: The Oregon Coast is quite cold, and the water of the Pacific Ocean at this location is quite colder. You will notice that my photos of the beach on this hot summer day feature surfers in full wet suits and beach walkers with jackets and long pants.
So, just come prepared for "Hot Temperatures" at the Oregon Coast to be relative: most of the time temperatures are still cold enough to require coats for even local people.
South Beach State Park has become a very popular spot for surfing. I'm not involved in surfing, so I don't know exactly why this is.
However, much of the Oregon Coast has some fairly severe problems with strong currents and severe undertow.
South Beach State Park has been created over the past 100 years or so by the installation of the jetties on the approach to Yaquina Bay. These have calmed the sand-bearing ocean currents, making them deposit their loads of sand at the South Jetty. These relatively calm waters, but still Ocean facing to promote wave formation, may create good surfing conditions that everyone is after.
When the jetties were built at the entrance to Yaquina Bay, the ocean currents were altered and sand started to be deposited on the south side of the South Jetty.
By 1940 the shore line had managed to move quite some distance from where it once was.
Today, the shore line is over 1/4 of a mile out to sea from where it once was, and a bicycle path, trees, coastal grasslands, and a sandy beach now sit where the open ocean once was.