Harbor Marker Buoys is an open-water sandbar surf spot located between St. Simon's and Little St. Simon's. It's a bit out there, sitting straight out from 5th Street, which means that you'll need a boat or kayak to reach it. This spot tends to break better at low tide when the conditions are right. While it’s visible from shore, the distance can make it a bit of a trek for those looking to catch some waves.

The surf here can range from waist to head high (about 1 to 2.1 meters) and is best when the swell is coming from the NorthEast, EastNorthEast, or East. You can expect waves to break over sand, providing both right and left-hand waves suitable for various skill levels, including beginners and experts. When conditions align, it can handle swell sizes from about 4ft to 7ft (1.2 to 2.1 meters). The wind is generally best from the SouthWest to WestNorthWest, with the ideal tide height being mid to high. However, the waves can be pretty inconsistent, and you'll often find yourself paddling in an inlet, so it's good to come prepared for some workout.

Accessing Harbor Marker Buoys requires paddling, and it's a pretty good distance out, so expect to spend some time on the water. The location usually keeps crowds away, so you might get some waves to yourself. Be mindful of strong currents and large ships in the area, as they can be hazards when out surfing. The typical surf season here runs through late summer, early fall, and early spring, making those times the best for catching some rides.