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PART
Ready in under 30 minutes | Grill time: 2-4 minutes per side
Best served rare to medium rare | Works on indoor or outdoor grills
If you’ve ever been nervous about cooking tuna at home, this tuna steaks on the grill recipe is about to change that. These juicy grilled tuna steaks cook up hot and fast in just minutes with a bold homemade marinade and perfectly tender, melt-in-your-mouth centers.
I’ll be the first to admit that younger me would’ve never believed I’d grow up to be the kind of person obsessing over grilled ahi tuna. But somewhere between all the travelling, eating, and learning to appreciate food a whole lot more, tuna quietly became one of my all-time favourite things to cook. Whether it’s perfectly seared on the grill or served raw like this tuna sashimi recipe, I just can’t get enough. And honestly? Once you realize how quick and ridiculously good it is on the grill, there’s really no going back.
These grilled tuna steaks are packed with flavour thanks to a simple soy, sesame, ginger, and lime marinade that gives them the perfect balance of savoury, fresh, and just a little kicky. They’re hearty enough to stand on their own with a side of steamed rice or crispy garlic broccoli, but they’re also incredible sliced over this ahi tuna salad or tucked into bowls with crunchy veggies and a drizzle of roasted sesame dressing. Fancy enough for a summer dinner party, easy enough for a random Tuesday night when you want something that feels a little extra without actually being extra.
✳︎ Why You’ll Love This Tuna Steaks on the Grill Recipe
- The tuna cooks in under 8 minutes, making this one of the fastest dinners you can throw on the grill.
- That homemade marinade gives the tuna big flavour without overpowering its naturally rich, buttery texture.
- Works beautifully on both indoor and outdoor grills, so weather doesn’t get the final say.
- Perfect for serving rare to medium-rare with those gorgeous pink centers restaurant-style tuna is known for.
- Fancy-looking enough to impress people, easy enough that you barely break a sweat making it.
What You’ll Need
You only need a handful of fresh, flavour-packed ingredients to make these juicy grilled tuna steaks. The tuna itself is rich and meaty, so the simple homemade marinade really gets a chance to shine without overpowering it. A little soy sauce, sesame oil, lime, garlic, and ginger go a long way here.
✳︎ Best Tuna for Grilling
Ahi tuna, also known as yellowfin tuna, is my top pick for this tuna steaks on the grill recipe. It has a firm, meaty texture that holds up beautifully on the grill while still staying tender and buttery in the center. Look for tuna steaks that are about 1½ to 2 inches thick if possible. Thicker steaks are much more forgiving and give you that gorgeous seared outside with a perfectly pink middle.
Fresh is great if you can find it, but don’t shy away from good-quality frozen tuna steaks either. Just make sure they’re fully thawed and patted dry before marinating and grilling. Since tuna cooks incredibly fast, starting with evenly sized steaks helps everything cook at the same rate.
Tuna Marinade Ingredients
This quick tuna marinade is bold, savoury, fresh, and just a little spicy. It comes together in minutes but gives the tuna so much flavour.
- Soy Sauce: The salty, savoury base that seasons the tuna all the way through.
- Sesame Oil: Adds rich nutty flavour and gives the marinade that classic Asian-inspired vibe.
- Garlic + Green Onion: Fresh, punchy flavour that pairs perfectly with grilled tuna.
- Lime Juice: Brightens everything up and balances the richness of the fish.
- Sriracha: Just enough heat to keep things interesting without overpowering the tuna.
- Ground Ginger: Adds warm earthy flavour that works beautifully with soy and sesame.
- Pepper: Simple but important for rounding everything out.
Finish the grilled tuna steaks with extra green onions and sesame seeds for freshness, crunch, and a little extra texture in every bite.
Key Tips for Grilling Tuna Steaks
Tuna steaks cook fast. Like really fast. Which is great news for dinner, but it also means there’s a pretty small window between perfectly tender and sadly overcooked. These quick tips will help you nail them every single time.
- Use thick tuna steaks if possible. Tuna steaks that are about 1½ to 2 inches thick are much easier to grill without drying out. They give you that gorgeous seared exterior while keeping the center tender and pink.
- Don’t marinate the tuna too long. Since tuna is such a delicate fish, the lime juice in the marinade can start breaking down the texture if it sits too long. Anywhere from 30 minutes to 2 hours is perfect.
- Pat the tuna dry before grilling. This helps the outside sear properly instead of steaming on the grill.
- Get your grill hot, hot, hot. Tuna loves high heat. A properly heated grill gives you those beautiful grill marks and a quick sear without overcooking the middle.
- Brush off large pieces of garlic and green onion. Tiny bits are fine, but the bigger pieces can burn quickly once they hit the grill.
- Keep a close eye on the cooking time. Most tuna steaks only need about 2 to 4 minutes per side depending on thickness and how you like them cooked.
- Let the tuna rest before slicing. Just a couple of minutes helps the juices redistribute and makes the tuna easier to slice cleanly against the grain.
Tuna Steak Doneness Guide
One of the best things about grilling tuna steaks is that you can cook them exactly how you like them. Just keep in mind that tuna is much leaner than beef, so the longer it cooks, the drier and firmer it becomes. For the best texture, I personally recommend serving tuna steaks rare to medium-rare.
Rare
- Deep pink to bright red center
- Lightly seared on the outside
- Cool, buttery, melt-in-your-mouth texture
- About 2 minutes per side
This is my favourite way to eat grilled tuna and the doneness you see in these photos.
Medium-Rare
- Warm pink center
- Firm around the edges with a tender middle
- Still juicy and soft
- About 3 minutes per side
A great option if you want the tuna slightly more cooked without losing that tender texture.
Medium
- Light pink center
- Less juicy but still flavourful
- About 4 minutes per side
Anything beyond this starts heading into dry territory pretty quickly.
✳︎ Helpful Doneness Cue
One of the easiest ways to tell when tuna is done grilling is by watching the colour change along the sides of the steak. As it cooks, the deep red center slowly turns light pink moving upward from the grill grates. It’s basically a built-in visual timer and super helpful when working with thicker tuna steaks.
Common Mistakes to Avoid
Tuna steaks are quick and easy to grill, but there are a few things that can take them from perfectly juicy to disappointing real fast. Here are the biggest mistakes to avoid:
- Overcooking the tuna. This is the big one. Tuna cooks incredibly fast and can dry out before you know it. For the best texture, aim for rare to medium-rare.
- Using tuna steaks that are too thin. Thin steaks cook through almost instantly and are much harder to keep tender in the middle. Thicker cuts work best here.
- Grilling over low heat. Tuna needs high heat for a quick sear. A hot grill helps create that beautiful crust while keeping the center soft and buttery.
- Marinating too long. The lime juice in the marinade can start breaking down the fish if left too long. Stick to about 30 minutes to 2 hours max.
- Trying to flip the tuna too early. If the tuna is sticking badly, it usually just needs another minute. Once properly seared, it’ll naturally release from the grill much easier.
What to Serve with Grilled Tuna Steaks
These grilled tuna steaks pair beautifully with fresh, light sides that let the rich, meaty flavour of the tuna shine.
If you’re looking for even more inspiration, be sure to check out my full list of the best side dishes for tuna steaks featuring everything from fresh salads to cozy rice and veggie sides that pair perfectly with grilled tuna.
FAQs
more seafood recipes you’ll love
If you loved these grilled tuna steaks, here are a few more seafood recipes worth adding to your dinner rotation. From quick weeknight fish dinners to restaurant-worthy favourites, these are the kinds of recipes that somehow end up on repeat.
- Parmesan Crusted Fish. Crispy, golden, and packed with flavour.
- Easy Oven Broiled Cod. Light, flaky, and ready in no time.
- Greek Style Shrimp Saganaki. Juicy shrimp baked in a garlicky tomato feta sauce.
- Mediterranean Baked Halibut. Fresh, vibrant, and loaded with Mediterranean flavour.
- Pan Seared Salmon with Lemon Caper Butter Sauce. Rich, buttery, and perfect for date night at home
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Tuna Steaks on the Grill Recipe
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Ingredients
For the Tuna Steaks
- 2 ahi tuna steaks (~1.5-2 inches thick)
- 1 green onion (thinly sliced, for garnish)
- 1 tbsp sesame seeds (for garnish)
For the Marinade
- ¼ cup soy sauce
- 2 cloves garlic (finely minced)
- 1 green onion (thinly sliced)
- 1 lime (juiced)
- 1 tbsp sesame oil
- 1 tsp sriracha
- ½ tsp ground ginger
- ¼ tsp black pepper
Instructions
- Pat the tuna steaks dry with paper towel and place them in a large zip-top bag or shallow dish.
- In a small bowl, whisk together the soy sauce, garlic, green onion, lime juice, sesame oil, sriracha, ground ginger, and pepper. Pour the marinade over the tuna steaks, making sure they’re evenly coated.
- Refrigerate for 30 minutes up to 2 hours, but no longer as the lime juice can start affecting the texture of the fish.
- Preheat an indoor or outdoor grill to medium-high heat and generously grease the grates. Remove the tuna steaks from the marinade, brushing off any large pieces of garlic or green onion to prevent burning. Place the tuna steaks on the hot grill.
- Cook for 2 to 4 minutes per side depending on thickness and desired doneness. For best results, the tuna should be nicely seared on the outside and still pink in the center.
- Transfer the grilled tuna steaks to a cutting board and let them rest for a couple of minutes before slicing against the grain.
- Garnish with sliced green onions and sesame seeds, then serve immediately with soy sauce or spicy mayo for dipping if desired.
Notes
Nutrition
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