Growing up in a tight-knit Portuguese neighborhood, fresh fish was never hard to find. There were plenty of Portuguese markets nearby, and my parents had their favorite fish market they’d go back to again and again. New Bedford is one of the largest commercial fishing communities in the United States, so the fish that came through those markets was as fresh as it gets. My dad would bring home tuna steaks and fire up the charcoal grill outside, and the smell alone was enough to bring the whole family to the table. These Grilled Fresh Tuna Steaks are as simple and honest as that memory — good fish, bold seasoning, and a hot grill.

Grilled Fresh Tuna Steaks seasoned with garlic lemon and parsley served with fresh vegetables

What Are Grilled Fresh Tuna Steaks?

Grilled fresh tuna steaks are a staple of Portuguese coastal cooking, where tuna has been a prized catch for centuries. Unlike canned tuna, a fresh tuna steak grills more like a piece of beef — firm, meaty, and rich — making it ideal for high heat. In the Azores, tuna is central to the local food culture, and Azorean families in New England carried that tradition with them. This recipe keeps it simple: a bold marinade of garlic, hot pepper sauce, lemon juice, and parsley, then straight onto the grill. The result is exactly what grilled fresh tuna should be — flavorful, slightly charred on the outside, and tender in the middle.

How to Make This Recipe

The most important step is the marinade, and the most important thing about the marinade is time. Season the tuna steaks with salt, pepper, chopped garlic, hot pepper sauce, parsley, olive oil, and lemon juice, then let them sit for at least an hour before grilling. That marinating time is what moves this from good to great — the acid from the lemon starts to work on the fish, and the garlic and pepper have time to actually penetrate the meat. When you’re ready to grill, use high heat and don’t move the steaks around. Let the grill do its job and you’ll get a clean sear with good color.

Tips for the Best Grilled Fresh Tuna Steaks

Marinate for at least one hour. The recipe says it, and it means it. Don’t skip this step or rush it.
Fresh tuna only. This recipe does not work with canned tuna. You need actual tuna steaks from a fish counter.
Don’t overcook it. Tuna gets dry and chalky when overdone. Aim for a slightly pink center — it will continue cooking briefly off the heat.
High heat is your friend. A hot grill gives you the sear and char that makes grilled tuna worth eating. Medium heat just steams it.
Season to your taste, but be generous. The marinade is doing all the flavor work here, so don’t be shy with the garlic and hot pepper.
Let it rest for a couple of minutes after grilling before serving. It makes a difference.
Pair it simply. Fresh vegetables, crusty bread, or rice let the fish be the star.

Serving and Storing

Grilled fresh tuna steaks are best served immediately off the grill while they’re hot. They pair well with roasted or steamed vegetables, a simple green salad, or white rice. Leftovers can be stored in an airtight container in the refrigerator for up to two days. Cold leftover tuna steak is actually excellent flaked over a salad the next day — don’t let it go to waste.

A good cast iron grill pan is a great backup when the charcoal grill isn’t an option — you still get the sear and the char marks indoors. Here’s one from Lodge that I like.

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