Sandbar

What is a sandbar?

A sandbar is a submerged ridge of sand running roughly parallel to the shoreline, built and moved by wave action. Waves break over the bar, then reform in the deeper trough between the bar and the beach. Sandbars explain a lot of beach behavior: why you can wade out to shallow water and then drop into a hole, why waves break in lines offshore, and why rip currents form where water escaping the trough cuts a channel back out to sea.

Also called: sandbars.

The drop-off problem

A bar lies to you. Walking out on one gives a false sense of the beach profile. The trough behind you and the deep water beyond the bar can both be over your head. A child who wades confidently to chest depth on a bar is one step from swimming, and the step is not gradual. Keep hands on small children in any water where you cannot see the bottom.

Where the current goes

Water pushed over the bar has to return seaward, and it does so through gaps. Those gaps are the rip current channels. This is why the calm-looking break in the surf line is the spot to avoid, and why guards move swimmers laterally rather than telling them to stay closer to shore.

Why the beach is different every year

Bars move every winter. Storms rearrange them, sometimes steepening the beach into a shore break profile and sometimes flattening it out. Ocean City also replenishes its beach periodically, which resets the profile again. A spot that was ideal for toddlers last August may be a drop-off this July. Read the water each visit instead of relying on memory.

Reading the surf line

Current source: Town of Ocean City Beach Patrol. Fees, hours, posted rules: all of it moves without much notice, so confirm anything time-sensitive on the day you go.

Related terms in this glossary

Sandbar rarely settles a plan on its own. These come up in the same decision, and each one has its own page, so open whichever part you're still unsure about.