Safe Tuna Cooking Temperature: FDA Guidelines & Best Practices

FDA Minimum Internal Temperature for Tuna

The FDA Food Code requires all fish, including tuna, to reach an internal temperature of 145°F (63°C) for food safety. This temperature must be maintained for a full second at the thickest part of the fish. Whether you're cooking ahi tuna steaks, yellowfin, or canned tuna products, this standard applies across all preparation methods—grilling, baking, pan-searing, or poaching. Some sushi-grade tuna consumed raw has undergone special freezing protocols (ultra-low temperature freezing at -4°F or below for 7 days) as outlined by FDA regulations, but home cooks should never rely on raw tuna unless explicitly sourced as sushi-grade from certified suppliers.

How to Properly Measure Internal Temperature

Using a calibrated food thermometer is the only reliable way to verify tuna has reached a safe temperature. Insert the thermometer probe into the thickest part of the fillet, avoiding bone or the cooking surface. Verify your thermometer is accurate by testing it in ice water (should read 32°F) and boiling water (should read 212°F). Leave the thermometer in place for at least 15 seconds to obtain a stable reading. Instant-read digital thermometers provide quick, accurate results and are recommended by the USDA and FDA for home cooking verification.

Common Undercooking Mistakes to Avoid

One major error is removing tuna from heat before it reaches 145°F, often because the exterior appears fully cooked while the interior remains unsafe. Another mistake is skipping the thermometer entirely and relying on visual cues or cooking time estimates, which vary based on thickness, starting temperature, and equipment type. Failing to allow proper resting time—at least 3 minutes after removing from heat—can mask unsafe temperatures since the internal temperature continues to rise during resting. Additionally, cross-contamination during preparation (using unwashed cutting boards or utensils on raw tuna, then on ready-to-eat foods) can introduce pathogens even if cooking temperatures are correct.

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