Under a hot broiler, swordfish steaks usually need 8–12 minutes total, or 4–6 minutes per side, until they reach 145°F and look opaque.
Broiled swordfish has a firm, meaty bite and a rich flavor that stands up well to high heat. The tricky part is timing. Too short and the center looks glassy and underdone; too long and the steak dries out around the edges. Knowing how long to broil swordfish helps you land in that juicy, just-done window every time.
Time alone never tells the full story, though. Broiling time depends on steak thickness, how close the rack sits under the heating element, and how hot your broiler runs. A simple time chart paired with a thermometer and a few visual cues gives you reliable, repeatable results.
How Long To Broil Swordfish? Basic Time Ranges
If you only remember one thing about how long to broil swordfish, make it this: start with 4–6 minutes per side for a 1-inch steak under a fully preheated broiler, then adjust a little for thickness. You still need to check doneness, yet these ranges keep you in a safe zone where the fish cooks through without turning tough.
The table below shows typical broiling times for swordfish steaks at high heat. These numbers assume the pan sits 4–6 inches under the element and the oven is fully hot before the fish goes in.
| Steak Thickness | Time Per Side | Estimated Total Time |
|---|---|---|
| ½ inch (1.25 cm) | 2–3 minutes | 4–6 minutes |
| ¾ inch (2 cm) | 3–4 minutes | 6–8 minutes |
| 1 inch (2.5 cm) | 4–6 minutes | 8–12 minutes |
| 1¼ inches (3 cm) | 5–6 minutes | 10–12 minutes |
| 1½ inches (4 cm) | 6–7 minutes | 12–14 minutes |
| Thin tail pieces | 1–2 minutes | 2–4 minutes |
| Frozen then thawed steaks | Add 1 minute | Add 2 minutes |
Use these times as a starting point, not a rigid rule. Ovens vary, broilers sit at different distances, and some pans reflect more heat than others. Begin checking a minute earlier than the low end of the range so you can pull the fish as soon as it reaches a safe internal temperature.
Prep Steps Before You Broil Swordfish
Choose The Right Swordfish Steak
Pick steaks that look moist, with a fresh sea smell and no dark, dry patches around the edges. A uniform thickness across the steak helps it cook at the same pace from center to edge, which matters when you are watching minutes under a broiler.
Pat Dry, Season, And Oil
Blot both sides of the steak with paper towels so the surface cooks instead of steaming, then season with salt, black pepper, and any dry spices you enjoy. A light coat of oil on both the fish and the pan reduces sticking and encourages even browning in the short broiling time.
Preheat The Broiler And Pan
Turn the broiler on high 10–15 minutes before you cook and place the empty pan or broiler-safe rack in the oven. Starting with a hot pan helps the underside of the swordfish sear as quickly as the top, trimming a minute or two off the total time and keeping the steak juicy.
Broil Swordfish Time By Thickness And Heat Level
Once the broiler and pan are hot, slide the steak on the pan, set the rack 4–6 inches from the element, and set a timer based on the thickness. For a 1-inch steak, many cooks find that a first side of about 5 minutes gives good color; the second side often needs a little less time.
Position Under The Broiler
Most home ovens have two rack positions near the top. Use the lower of the top two racks for thicker steaks to prevent the surface from scorching while the center warms through. Use the higher rack for thin pieces that need only a short broil.
If your broiler has low and high settings, choose high and rely on distance and time for control. Low settings stretch the time and can dry the surface as the fish slowly approaches doneness.
Flip, Check, And Rest
Flip the swordfish once the surface has picked up some color and looks opaque a few millimeters down. For a 1-inch steak, that tends to fall around the 4–6 minute mark on the first side. Use a thin metal spatula and slide under the steak in one motion so it stays intact.
After the flip, start checking internal temperature with a thin probe thermometer near the center of the steak. Food safety agencies recommend cooking fin fish to 145°F, or until the flesh looks opaque and separates easily with a fork. When the center hits that mark, move the pan to a cool rack and let the fish rest for 3–5 minutes.
How To Tell Swordfish Is Done Safely
A thermometer gives the most reliable answer to how long to broil swordfish, since it measures heat inside the thickest part of the steak. Slide the probe into the center from the side, not straight down through the top, so you hit the core instead of the hot surface.
The safe minimum internal temperature chart for seafood lists 145°F for fin fish. At that point the flesh should turn opaque, lose its shiny raw sheen, and flake when you press it gently with a fork. If you see translucent layers or a jelly-like texture, give the fish another minute and test again.
Color varies by species, so rely more on texture than on hue. Broiled swordfish often keeps a slightly rosy look in the center even when cooked through, especially in thicker steaks. The main sign is that the flakes separate easily and the center feels warm and moist, not cool or rubbery.
Swordfish Serving Size, Nutrition, And Mercury
Most people serve 4–6 ounces of cooked swordfish per person, which fits a standard plate and leaves room for sides. A typical cooked serving provides high quality protein along with nutrients such as vitamin B-12 and magnesium.
At the same time, swordfish ranks among species with higher average mercury levels. U.S. guidance for consumers notes that those who are pregnant, might become pregnant, or are feeding young children should avoid high-mercury fish and pick lower-mercury options instead. The FDA advice about eating fish includes a chart that shows which species fit into each category.
If that guidance applies to you or your family, use this broiling method for lower-mercury fish such as salmon, cod, or haddock and save swordfish for guests who do not need to limit high-mercury species.
Flavor Tips Without Overcooking Swordfish
Because swordfish has a rich, slightly sweet flavor, it pairs well with bold seasonings. The trick is to add flavor in ways that do not require long cooking times. Quick marinades, simple rubs, and sauces added after the fish leaves the broiler all work well.
Use A Quick Marinade Or Dry Rub
Citrus juice, olive oil, garlic, fresh herbs, and mild chile flakes make a bright marinade that complements the meatiness of swordfish. Keep contact time short so the acid does not toughen the surface, then pat off any excess before broiling so the fish browns instead of steaming.
Add Sauce At The End
Instead of coating the fish in sauce during cooking, spoon it over the steak once it rests. A mix of melted butter, lemon juice, capers, and chopped parsley stays bright and fresh because it spends no time under the broiler. This approach lets you keep the broiling time short while still serving a flavorful dish.
Troubleshooting Broiled Swordfish
Even with a time chart and a thermometer, the first few attempts at broiling swordfish can raise questions. Use the table below to match what you see on the plate with simple tweaks to time, rack position, or prep.
| What You See | Likely Cause | Next Time Try |
|---|---|---|
| Outside dry, inside just done | Broiler too far from fish or time too long | Move rack closer and shave 1–2 minutes off total time |
| Center underdone, surface too dark | Rack too close or thick-cut steak | Drop rack one level or buy slightly thinner steaks |
| Fish sticks to the pan | Pan or fish not oiled enough | Use more oil and preheat the pan fully |
| Uneven cooking across the steak | Steak thicker on one side | Choose more even cuts or trim thick edges |
| Rubbery texture | Cooked past 145°F and held too long | Check temperature earlier and rest only a few minutes |
| No browning on top | Broiler not fully preheated | Heat the broiler and pan longer before cooking |
| Smoke fills the kitchen | Pan too close to element or fat pooling | Use a clean, rimmed pan and adjust rack position |
Bringing It All Together
Broiling swordfish rewards attention to detail more than fancy technique. Set up the broiler so the heat reaches the fish fast, track minutes based on thickness, and confirm doneness with a thermometer and simple visual cues. With those habits in place, broiling swordfish stops feeling like a guess and becomes a short, reliable routine.
Once you are comfortable with the timing, you can branch out with spice blends, compound butters, and seasonal sides while keeping the basic broiling method the same. That mix of steady technique and small tweaks lets you serve broiled swordfish that feels special without adding much work to a busy weeknight for family and friends.
