How to Grill Tuna to Perfection – Complete Cooking Guide
How to Grill Tuna: Essential Preparation
Grilling fish can be extremely hard. Many questions come to mind. Do I need a basket? Do I need to oil the grill or the fish? How do I season the fish? Do I cook it on high, medium or indirect heat? How long do I cook it for?
I’ve messed this up more times than I care to admit. But over the years, I’ve figured out how to grill tuna perfectly, and I want to share that with you. Whether it’s your first time learning how to grill tuna or you want to improve, this guide will help you master how to grill tuna like a pro.
Selecting Your Tuna
Start with quality tuna steaks. Look for bright, firm flesh with a deep color. Frozen tuna works fine—just thaw it properly before grilling.
Tools You’ll Need
A good grill grate, tongs, and a meat thermometer are essential. Some people prefer a fish basket, but you don’t absolutely need one if your grill grate is clean.
Best Temperature for Grilling Tuna
This is where most people mess up. You need high heat. Aim for 400-450°F on your grill. Hot grates will create that perfect sear on the outside while keeping the inside rare or medium-rare.
Clean your grate thoroughly and oil it lightly. This prevents sticking and helps with the sear.
How Long to Grill Tuna: Timing Guide
Timing depends on thickness. A typical 1-inch tuna steak takes 4-5 minutes per side for medium-rare. Thicker cuts need a bit longer.
Don’t overcook it. Tuna dries out quickly. Aim for an internal temperature of 130-135°F for medium-rare. Use your thermometer—it’s your best friend.
Step-by-Step Instructions: How to Grill Tuna
Prepare Your Grill and Tuna
Preheat your grill to high heat. While it’s heating, pat your tuna steaks dry with paper towels. Moisture is the enemy of a good sear. Season with salt and pepper, or your favorite seasoning blend.
Searing Your Tuna Steak
Place the tuna directly on the hot grate. Don’t move it around. Let it sear for 4-5 minutes without touching it. You want that crust.
Flip once. Cook the other side for another 4-5 minutes.
Use your thermometer to check for doneness.
Checking for Doneness
Insert your thermometer into the thickest part of the steak. Medium-rare is 130-135°F. Some people like tuna rarer—that’s fine. Just don’t go past 145°F or it becomes dry.
How to Season Grilled Tuna
Simple is often best. Salt and pepper work great.
If you want more flavor, try Asian-inspired seasonings like soy sauce, ginger, and sesame oil. A light coating of olive oil before seasoning helps flavors stick.
Common Mistakes When Grilling Tuna
Overcooking: This is the biggest mistake. Tuna is best served medium-rare. Overcooked tuna is tough and dry.
Not using high enough heat: You need that sear. Medium heat won’t cut it.
Moving the fish around: Let it be. Don’t flip constantly or move it on the grate.
Using wet tuna: Pat it dry. Moisture prevents proper searing.
Related Grilling Recipes
Master more seafood on the grill. Check out our guides on how to grill lobster tails and explore our complete seafood recipes collection. Want to improve your overall cooking techniques? We’ve got you covered.
Excellent tutelage on grilling. I shake my head sadly when I see people try to get their grates back to 'like new' condition…
Excellent article. Followed directions and had a wonderful med rare tuna steak. Thanks so much!!!
I think this internet site has very excellent pent written content posts.
I call utter bullshit on 3.5 minutes per side for rare tuna. Save the money it costs to buy tuna and throw some shoe soles on the grill, you won't know the difference after 7 minutes.
Alex – it all depends on the thickness of your tuna steaks and the temperature of the grill. In this case the steaks are roughly 1.5 inches thick. I also suggested that you adjust the temperature so that you can hold your hand over the grates for 4-5 seconds you are at the perfect temp.
Although I can't dispute your scientific method or knowledge, but I have tested out the times and temperatures of the steaks and grill to determine the above chart.
Thanks for the comment.
I was also very doubtful about the timing. My experience with tuna led me to believe that I would end up rubber at those times. I decided to trust the expert, so I set the timer for 3.5 minutes per side. PERFECT!!!!!!!! It was absolutely the best tuna I have ever cooked. Thank you!
Agreed. I wish I read your comment instead of trusting Rex.
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Recently brought back fresh fish from the Gulf. I grilled the tuna according to your directions and . . . perfecto! Thanks for the explicit written directions and outstanding photos to visually guide us along.
needed your observations for assignment can u make them straight to the point.
The 4-5 second rule for your hand is a little vague. Some people have more tolerance for heat than others.
That is true Dan, but I have found that most people don't have surface thermometers and that was the easiest way I could describe it for the majority of my readers. Even with varying thresholds for each person the final temps are usually pretty close. Thanks for the comment. If you need grate temps let me know and I can get them to you.
Yellowfin tuna marinated in teriyaki sauce and garlic, then grilled to perfection. This is great at a tailgate party, or at your Saturday afternoon summer barbecue.
Hey
Im going to do this recipe tonight on my wood pellet smoker. I just wanted to inquire about actual temperatures for the grill. Thanks Im looking forward to it.
Sorry for the late response Riley. The comment was blocked by spam for some reason. I would turn your pellet grill up to high for this. Get it as hot as it will go so that you can get some nice sear marks.
Fantastic, fantastic, fantastic. LOVE THIS. Was able to grill tuna to perfection – boiled the marinade down and put a small amount on top before serving and it was delicious. Will definitely make again. Thanks.
Before the tuna is added to the grill, should the steak be at refrigerator temp and room temp ? Will either way effect the cooking of the steak?
Michael,
I keep the fish in the refrigerator until a couple minutes before I cook it. Just long enough to season it. I find that fish doesn’t react well to room temperatures.
Rex
You need to marinate in soy sauce and then cover in black and white sesame seeds. The best way is in a cast iron skillet that is very hot. Will sear the outsides…no need to fire up a grill.
Wow, my SO came home today with a couple pounds of AHI Tuna and it’s been forever since I had prepared any so I as a little nervous. I lucked on to your method and it was the best tuna I had ever eaten bar none !! I also made a avocado, mango, mint and orange ( I used Clementine tangerines) recipe that was on a different site but also for tuna . I did add some seasonings to that and served brown rice. That was one of the all around best meals ever for me. Thank you so much for the advice !!!
If my bbq has termometer what temperature should it have?
I would try to keep it above 500.
Cook times are completely wrong. I followed the directions for rare and actually took it off earlier than recommended. It came out well done. Thanks for helping keep ruin a perfectly good cut of fish. I’ll be sure not to seek advice from this site in the future.
Sorry everything did not work for you. I have tested this out over ten times with the exact same results as shown in the pictures. Unfortunately this recipe is based on a specific grill temperature and tuna steak thickness as discussed in the recipe and the times will vary if the exact thickness and temperature are varied. Hopefully you will be able to try it again with the correct temperature and thickness. Thanks again for reading.