How deep is the swimming lagoon? Is there a lot of current there? Driving directions?

The lagoon inside the foot bridge gets to about 15 ft at high tide and no current. If u go outside footbridge not bad current close to beach. On other side of sunken rocks current can be tricky at times don't venture out too far plus boat traffic To get to peanut Island u can take ferry at Riviera Beach marina unless u have a boat or kayak

If you snorkel on the Eastside of Peanut Island there's not that much current there at all make sure you go at slack tide for good snorkeling

No current. Very shallow. Very nice.

Depends on the tide.. good part is shallow. Google the shuttle to peanut island and it's there you get a ride over