When searching out flounder, you need to know its fall migration to much as 25 to 30 miles offshore. You also need to be able to read the water and pay attention to the tides. Flounder prefer to lie on the sandy bottom of inlets, under outcroppings and eddies around jetties. The flat fish also hangs out around pilings, artificial reefs or boat wrecks.
Many fishermen catch their flounder during September to November's end migration to deeper water.

The bait of choice varies. Fingerling mullet 3 to 4 inches long, mud minnows, live shrimp or even plastic grub tails are all popular. Some bait is easier to come by during the migration season. Keep the bait just off the bottom. The flounder takes the bait softly in its mouth and moves back to its hiding place before taking the big gulp. If you try to set the hook too quickly you will end up with a bit of fish. Be patient and wait a second or so. Try to use circle hooks that do the setting for you leaving you to reel in steady and smoothly.

As you work your way along the rocks or jetties, watch to see where the water eddies and slowly troll your bait across the area temping a hungry flounder to catch what they think is a bait fish holding its own in the current. When fishing in the surf, look for where the waves break and where there might be a sandbar where flounder wait. Watch for runnels which are shallow pools running lengthwise on the beach. Flounder like to wait at the end where the water comes in bringing in tasty morsels of bait fish. You can use many of these same principles when fishing from a boat.