How to Grill Swordfish Steaks Without Drying Them Out

The method in one minute

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Buy center-cut swordfish steaks about 1 to 1 1/4 inches thick. Pat them dry, season with salt, and coat lightly with oil. Preheat a clean grill for direct medium-high to high heat, roughly 425°F to 475°F at the grate. Oil the fish, put it on the hot grate, and leave it alone until it releases cleanly. Flip once, then verify the center with an instant-read thermometer.

USDA FSIS lists 145°F as the safe minimum internal temperature for fish and shellfish on its safe temperature chart. Measure in the thickest part, taking care not to push the probe through into hot grate air. Rest briefly, add a fresh sauce, and serve.

A one-inch steak often needs about four to five minutes per side, but thickness, starting temperature, grate material, wind, and grill output all matter. Cook to internal temperature, not to the clock.

Why swordfish belongs on a grill

Swordfish is dense and muscular. A center-cut steak holds together where a thin flaky fillet might break, so it can take direct heat, a clean flip, and visible grill marks. Its mild flavor also works with smoke, citrus, herbs, chile, capers, olives, and garlic.

That strength creates the main risk: people treat it exactly like beef. Swordfish is leaner than a ribeye and can become dry when cooked too long. A hard sear should happen quickly, and the finish should be measured rather than guessed from color alone.

The current 2026 swordfish grilling guidance we compared with established recipes, including Food Network's lemon-herb method, agrees on the broad approach: choose steaks at least an inch thick, use a clean well-oiled hot grate, flip sparingly, and measure doneness. Recipes differ on marinade and sauce, but the heat-management fundamentals are consistent.

The meat temperature chart is the number to keep open during the cook. The clock is only a cue for when to start checking.

How to buy swordfish steaks

Ask for center-cut steaks of even thickness. One to 1 1/4 inches is the easiest range for direct grilling because the surface can brown before the center overcooks. Very thin steaks move through the safe finishing window quickly and are less forgiving.

The flesh should look moist and firm, not dried at the edges. Color varies naturally from ivory to pinkish, and a darker bloodline can be present. Fresh smell should be clean and mild, not sour or aggressively fishy. If the fish counter cannot tell you when it was cut or how it was stored, frozen may be the more predictable choice.

Good frozen swordfish is not second-rate. Fish frozen promptly can be in better condition than a "fresh" steak that spent days in distribution. Choose intact packaging without heavy frost, large ice crystals, or obvious freezer burn. Thaw overnight in the refrigerator on a rimmed tray.

Plan six to eight ounces per adult when swordfish is the main course, depending on sides and appetite. For a group, use the portion calculator and select a seafood-appropriate portion rather than buying by steak count alone. Individual steaks vary widely in size.

Skin on or off

Swordfish steaks often have a narrow band of skin around one edge. Leaving it on during grilling can help the steak hold its shape. The skin is tough, so most diners cut it away at the table. Removing it before cooking is also fine if the fishmonger has not already done so.

If you leave the skin, inspect it for scales and trim any loose flap that could burn. Do not rely on skin to protect the fish from a dirty or cold grate. The broad cut faces still need good contact and a light coating of oil.

Check for small bones by running clean fingers gently over the surface and edge. Swordfish steaks are normally cut across the loin and should not have the pin-bone pattern common in some fillets, but processing varies.

A simple lemon-herb preparation

For four six-ounce steaks, use:

• 4 swordfish steaks, 1 to 1 1/4 inches thick
• 2 tablespoons olive oil
• 1 teaspoon kosher salt, adjusted for crystal size
• 1/2 teaspoon black pepper
• Finely grated zest of 1 lemon
• 1 small garlic clove, grated
• 1 tablespoon chopped parsley
• 1 tablespoon chopped oregano or mint
• Lemon wedges for serving

Mix the oil, zest, garlic, pepper, and half the herbs. Pat the fish dry, salt both sides, then brush with the seasoned oil. Refrigerate while the grill heats, up to about 30 minutes. Save the remaining clean herbs and lemon wedges for the cooked fish.

Do not put a brush that touched raw fish back into a serving sauce. If you want extra sauce, divide it before the raw fish enters the process. Marinade that contacted raw seafood must be cooked before serving, and boiling a small oily batch is usually less convenient than keeping a clean portion separate.

Do not marinate all afternoon

Acid changes the proteins on the fish surface. A short lemony marinade adds flavor, but hours in strong citrus can make the exterior chalky or mushy before the grill is hot. Keep the contact brief, or put most of the acid in a finishing sauce.

Salt is more useful than a long acidic soak. Season 20 to 40 minutes before cooking, keep the fish refrigerated, and dry any moisture that beads on the surface. If time is short, salt immediately before grilling.

Oil belongs on the fish more than on a roaring-hot grate. A thin, even coat improves contact and reduces sticking. Excess oil drips, flares, and can leave soot. Use just enough to make the surface shine.

Set up a two-zone grill

Even for a fast direct cook, a cooler zone is insurance. On charcoal, bank lit coals on one side and leave the other side empty. On gas, heat one side or set of burners higher and leave another area low or off. Preheat with the lid closed, then clean the grate.

The direct zone should be hot enough to brown the fish quickly, around 425°F to 475°F at grate level. That is a cooking-environment temperature, not an internal fish temperature. The indirect zone gives you somewhere to move a thick steak if the exterior is colored before the center reaches the USDA minimum.

Use a grill brush without loose wire bristles or another safe cleaning method recommended for your grate. Inspect the surface afterward. Residue glues fish to metal, while a clean preheated grate lets the proteins set and release.

Fold a paper towel, hold it with long tongs, dip it lightly in high-smoke-point oil, and wipe the grate. Do not spray aerosol oil into flame. Keep the lid open and your hands away from flare-ups during this step.

Step-by-step grilling method

1. Dry and season

Remove the swordfish from its package over the sink area, place it on a clean tray, and pat every surface dry. Apply salt and the thin seasoned-oil coating. Keep the fish refrigerated until the grill is ready.

2. Preheat thoroughly

Heat the direct zone to roughly 425°F to 475°F. Give heavy cast-iron or stainless grates time to absorb heat, not just hot air. Clean and oil the grate immediately before the fish goes down.

3. Place and leave it alone

Lay each steak across the grate with room around it. Close the lid if your grill needs it to maintain heat. Do not slide, press, or repeatedly lift the fish. The first side needs uninterrupted contact to form a browned surface.

4. Flip once

Start checking release after about three minutes. Slide a thin fish spatula under one edge. If the fish clings, give it a little more time. When it releases, flip in one confident motion.

5. Check the center early

After roughly three minutes on the second side, insert the thermometer from the side toward the center of the thickest section. Side entry puts more probe length inside a relatively thin steak and reduces the chance of reading grate heat.

6. Finish safely

Continue cooking until the thickest part reaches 145°F, the USDA FSIS safe minimum for fish. If the outside is already as dark as you want, move the steak to the indirect zone and close the lid to finish more gently.

7. Rest and sauce

Move the fish to a clean platter, not the raw tray. Rest for about three minutes while you spoon over clean herb oil, salsa, or warm sauce. Serve promptly.

How long swordfish takes

The table below is a planning guide, not a doneness guarantee.

Steak thickness	Approximate total time over direct heat	When to start checking
3/4 inch	6 to 8 minutes	After 5 minutes total
1 inch	8 to 10 minutes	After 7 minutes total
1 1/4 inches	10 to 12 minutes	After 8 minutes total
1 1/2 inches	12 to 15 minutes, possibly with indirect finish	After 9 minutes total

Cold weather, a crowded grate, frequent lid openings, and a cold steak can stretch those estimates. A powerful grill or thin tail-end cut can shorten them. Start checking early because an additional minute can materially change a lean fish steak.

Do not use the opaque band climbing up the side as the sole test. It is useful as a visual cue, but grill heat is not always even and the center can lag. The USDA minimum is a measured 145°F in the thickest part.

Prevent sticking and tearing

Sticking usually begins before the fish touches the grate. The grate is dirty, not fully hot, or not lubricated. The fish may also be wet, or the cook tries to flip before a browned surface forms.

Fix the sequence:

1. Preheat the metal, not just the hood thermometer.
2. Scrape and inspect the grate.
3. Dry the swordfish.
4. Oil the fish lightly.
5. Wipe the hot grate with a small amount of oil.
6. Place the steak and wait for natural release.

If your grate is badly pitted, a cast-iron griddle plate can provide a smoother surface. Preheat it and use the same thin oil coating. You will trade open-grate marks for broad, even browning, which is often a good bargain.

The video below shows a high-heat Sicilian-style method and a tomato-olive topping. Watch how the steaks are handled on the grate, then follow the USDA 145°F internal target in this guide for the finish.

Three finishing sauces that keep it lively

Swordfish benefits from sauce because the meat is dense and mild. Add sauce after cooking so fresh acid and herbs stay bright.

Lemon-caper butter

Melt four tablespoons of butter in a small pan. Add one tablespoon drained capers and cook until fragrant. Remove from heat, then add lemon zest, a squeeze of juice, parsley, and black pepper. Spoon lightly over each steak.

Tomato-olive relish

Combine chopped ripe tomato, sliced olives, parsley, a little red onion, olive oil, and red wine vinegar. Salt it shortly before serving so the tomatoes do not flood the bowl. This cool relish works especially well after a dark grill sear.

Herb salsa

Chop parsley, mint, and oregano. Mix with olive oil, lemon juice, grated garlic, and a pinch of chile flakes. Keep it loose enough to spoon. Taste it on a bite of fish before adding more salt.

Any physical serving tools used here should be clean. Do not reuse the raw-fish brush, platter, or tongs without washing them first.

Charcoal, gas, and pellet grill adjustments

Charcoal

Charcoal gives the strongest live-fire character. Build a concentrated direct zone and keep a clear indirect side. Wait until the initial dirty smoke has cleared and the coals are burning cleanly. Put the fish over the hottest stable area, not over active flames.

Our two-zone charcoal fire guide shows the layout in detail. For swordfish, the indirect side may only be used for a minute or two, but that small escape lane can save a thick steak.

Gas

Preheat longer than the hood thermometer suggests because the grate needs stored heat. Leave one burner low or off. Keep the lid closed between checks, especially in wind. If flare-ups begin, move the fish sideways instead of spraying water into the grill.

Pellet grill

Most pellet grills cook indirectly, so browning can be lighter. Use the highest appropriate setting, preheat thoroughly, and consider a preheated griddle or sear plate approved for the cooker. Do not place accessories where they block designed airflow or grease drainage.

The lighter smoke profile is a good fit for fish. Strong, stale smoke can overwhelm swordfish. Use clean-burning pellets and give the steak space rather than trying to extend a fast cook just to collect more smoke.

Common mistakes

Buying steaks that are too thin

A thin steak reaches 145°F before the surface develops much color. Choose at least one inch when possible, or use a hot griddle for faster browning.

Using too much acid

Hours of lemon juice change the surface texture. Put zest and oil in the short marinade, then add fresh juice after cooking.

Pressing the fish

Pressing does not create better contact after the first moment. It squeezes moisture, encourages sticking, and can split the steak. Let heat and a clean grate do the work.

Flipping repeatedly

Each lift risks tearing. One main flip gives the first side time to release. Rotate only if your heat map makes it necessary.

Trusting a fixed time

Two one-inch steaks may have different weight, shape, and starting temperature. Begin with a time estimate and finish with a thermometer.

Serving on the raw platter

This reverses all the care taken at the grill. Bring a clean plate and clean utensils outside before cooking begins.

Leftovers and reheating

Refrigerate leftovers promptly in a shallow covered container. USDA FSIS lists 165°F for reheated leftovers on the same safe minimum temperature chart. Swordfish can dry during reheating, so add a little sauce, cover it, and warm gently before verifying the center.

Cold cooked swordfish also works in a salad when it has been handled and chilled safely. Flake it into large pieces, add a lemony dressing, and serve immediately. Do not leave cooked fish sitting at a warm outdoor buffet.

Final checklist

• Buy an even center-cut steak at least one inch thick.
• Thaw in the refrigerator and pat completely dry.
• Keep acidic marinades short.
• Build a hot direct zone plus a cooler escape zone.
• Clean the grate, oil the fish, and wipe the grate lightly.
• Leave the first side alone until it releases.
• Flip once and probe from the side.
• Cook to 145°F in the thickest part, as USDA FSIS specifies.
• Move cooked fish to a clean platter.
• Finish with fresh acid, herbs, or sauce.

Swordfish is one of the easiest seafood cuts to put directly on a grill, but it rewards restraint. Buy a thick steak, prepare the cooking surface, make the sear quickly, and let the thermometer decide the finish. That is the whole path from expensive raw fish to a juicy, browned dinner.