how long to grill swordfish
1 Preheat outdoor grill for medium heat. 2  Marinate swordfish in teriyaki sauce for 5 minutes per side.  Lightly oil grill grate. Grill steaks, basting frequently with melted margarine, for 5 to 6 minutes per side, or until fish flakes easily with a fork. Season with garlic powder, and serve.