When we first moved down to Florida, my husband and I used to take our youngest daughter fishing around the area. We came across Currie Park, and fished there several times off the boardwalk.
Even if you don't fish, it's nice to sit on the boardwalk and watch boats and wave runners launch from the ramps and glide around the Intracoastal. It's right across from Palm Beach, so your view is of multi-million dollar mansions.
The main drawback though is that the boardwalk is not covered so it does get hot. They do have restrooms on site, which is a plus.