Cato’s Bridge is one of those blink-and-you’ll-miss-it spots that locals love — and if you know when to go, it’s an unexpectedly fun place to swim. Yes, you can actually swim under the bridge, and on a clear day, you might spot starfish, rays, or even manatees cruising through with the incoming tide.

Timing is everything here. Go during high tide, when the water is coming in from the ocean and visibility is best. The current can move fast, so this isn’t a float-and-relax spot — you’ll want to be alert and aware of your surroundings the entire time.

How to do it right:

• Park only at the Jupiter Inlet Lighthouse & Museum lot — street parking is heavily patrolled, and tickets are common.

• Walk to the west side of the bridge, where most people enter the water.

• Bring a mask, snorkel, water shoes, and a dry bag if you want to keep your stuff safe nearby.

There’s no lifeguard, and the area is active with boat traffic, so skip this spot if conditions look rough or if you’re not a confident swimmer. Keep kids close, and avoid going during peak boating times (like weekend afternoons). Early mornings or midweek high tides are usually your best bet.

It’s not a beach day, but it’s definitely a fun, off-the-radar Florida experience — especially if you love clear water, wildlife, and a little adventure.