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How long to bake salmon at 350 in oven depends mostly on three things: how thick the fillet is, whether it’s fresh or still frozen, and whether you tent it with foil. A clock alone won’t tell you it’s done, because a thin tail-end piece and a thick center-cut piece from the same fish can need very different times in the same oven.
Quick answer: At 350F, a standard fresh salmon fillet (about 1/2 to 1 inch thick) takes roughly 15 to 20 minutes uncovered. Thinner pieces run closer to 10 to 15 minutes, thicker center cuts closer to 20 to 25 minutes, and frozen fillets need about 50 percent longer. Confirm doneness with a thermometer, not the timer.
| Fillet Thickness | Fresh or Frozen | Foil or Uncovered | Approx. Time at 350F | Suggested Pull Temp* |
|---|---|---|---|---|
| Thin (under 1/2 inch) | Fresh | Uncovered | 10-12 min | 120-125F |
| Thin (under 1/2 inch) | Fresh | Foil | 12-15 min | 120-125F |
| Medium (1/2-1 inch) | Fresh | Uncovered | 15-18 min | 125-130F |
| Medium (1/2-1 inch) | Fresh | Foil | 18-22 min | 125-130F |
| Thick (1-1.5 inches) | Fresh | Uncovered | 20-25 min | 130-135F |
| Thick (1-1.5 inches) | Fresh | Foil | 22-28 min | 130-135F |
| Whole side (1.5-2 inches) | Fresh | Uncovered | 25-30 min | 130-135F |
| Thin (under 1/2 inch) | Frozen, not thawed | Uncovered | 20-25 min | 125-130F |
| Medium (1/2-1 inch) | Frozen, not thawed | Uncovered | 25-30 min | 130-135F |
| Thick (1-1.5 inches) | Frozen, not thawed | Foil | 32-38 min | 130-135F |
*These pull-temp ranges reflect a moist, just-set texture that many cooks prefer, and the number will rise slightly as the fish rests. The USDA Food Safety and Inspection Service lists 145F as the safe minimum internal temperature for fish. If you want to follow that standard exactly, cook to 145F and check with a thermometer at the thickest point.
If you’re working with fish labeled for raw or rare consumption and pulling it lower than that, that’s a personal and sourcing decision, not a food-safety one. Check the USDA’s own temperature table directly if you’re unsure of the official figure.
How Long to Bake Salmon at 350 in Oven: Why Thickness Beats the Clock
350F is a middle-ground oven temperature for salmon. It’s gentler than 400-425F roasting, which is why times in the table above run a bit longer than what you’d see at higher heat. The tradeoff is more even cooking and less risk of a dry exterior before the center catches up, which matters most on thicker cuts.
Because fillets from the same fish vary in thickness from tail to center, the single biggest lever on your bake time is how thick the piece actually is, not the species or the recipe you’re following. Use this quick decision rule before you set a timer:
- If the fillet is under 1/2 inch at its thickest point, start checking at the 10-minute mark.
- If it’s going in frozen, add roughly 50 percent to whatever time the fresh version of that thickness would need.
- If you’re tenting with foil, add 2 to 6 minutes depending on thickness, since trapped steam slows browning and extends the cook.
- If the pan is crowded or fillets are touching, add a few minutes across the board and check the most-covered piece last.
Treat the table as a starting point, not a guarantee, and start checking a few minutes before the low end of the range that matches your fillet.
What Changes the Number
Fillet Thickness
Measure at the thickest part, not the average. A fillet that’s 1.5 inches at the center and tapers to a thin tail will have the tail done well before the center, so either cut it into separate portions or pull the thin end early.
Fresh vs Frozen
Baking from frozen without thawing adds roughly 50 percent more time compared to a fresh or fully thawed fillet of the same thickness. The exact amount varies by how solidly frozen the fish is and how cold your freezer runs. If you have 15 extra minutes, thawing in the refrigerator or under cold running water gives you a more predictable bake and better texture.
Foil or Uncovered
Foil traps steam, which slows browning and extends cook time slightly, but it also helps keep thinner cuts from drying out. Uncovered baking browns the top and finishes a few minutes faster. Neither is wrong. Pick foil for thin or lean cuts you’re worried about drying out, and skip it when you want a bit of color on top.
Starting Temperature of the Fish
A fillet straight from the fridge cooks faster than one that’s been sitting out, and a fillet straight from the freezer cooks slower than either. If your fish has been resting on the counter while the oven preheats, start checking a few minutes earlier than the table suggests.
Your Oven
Oven thermostats vary by model, and convection settings cook noticeably faster than conventional bake, sometimes by several minutes on a piece this size. If you’ve never checked your oven against an oven thermometer, treat the times above as a range to watch rather than a number to set and walk away from.
How to Check Doneness
The most reliable check is an instant-read thermometer inserted into the thickest part of the fillet, away from any bone. Salmon is notoriously easy to overcook because the visual cues, like opaque color and flaking, tend to show up close to the point where the fish has already dried out. A thermometer reading is more useful than appearance alone. A compact instant-read thermometer is worth keeping near the oven for exactly this kind of check.
If you want a visual backup, gently press the top of the fillet with a fork at the thickest point. It should flake easily but still look moist, not dry or chalky, inside. This works as a secondary check, not a replacement for temperature, the same way it’s worth confirming doneness by number rather than guesswork on cuts like the ones covered in our tri tip doneness chart.
Common Mistakes
- Timing by the recipe instead of the fillet. A recipe written for a 1-inch fillet will overcook a thin tail piece and undercook a thick center cut at the same number of minutes.
- Skipping the thermometer because the fish looks done. Color change happens before the right internal temperature in many cases, especially with foil covering the pan.
- Baking straight from frozen without adding time. This is the single biggest source of undercooked centers with salmon baked at 350.
- Not accounting for carryover cooking. A fillet pulled at the top of your target range will keep cooking for a minute or two as it rests, so pulling slightly early is safer than pulling slightly late.
- Crowding the pan. Fillets touching each other or packed too close together cook unevenly and take longer overall, the same issue that shows up with other oven-baked proteins like the ones in our flank steak time chart, where thickness and spacing both move the number.
Troubleshooting: It’s Past the Time in the Chart and Still Not Done
If the timer ran out and the center is still translucent or cool on a thermometer, work through these checks in order before adding more time blindly:
- Re-measure the thickest point. If you measured the tail instead of the center, the real thickness category may be one row higher on the table.
- Check whether it went in frozen. A fillet that wasn’t fully thawed needs the frozen-row time, not the fresh-row time, even if the outside looked thawed.
- Confirm your oven is actually at 350. A thermostat running 15-20 degrees cool will stretch every time in the chart. An oven thermometer settles this in one bake.
- Look at pan crowding and foil. Touching fillets and a foil tent both add time; if both apply, add the higher end of the ranges above rather than the lower end.
If all of that checks out and the center still reads well under your target, give it 3 to 5 more minutes and recheck with the thermometer rather than guessing from color.
FAQ
Is 350 a good temperature for salmon?
Yes. 350F is a reliable, forgiving temperature that cooks salmon evenly without the higher risk of a dry exterior that can come with 425F or higher. It takes a bit longer than hotter roasting methods, which the table above accounts for.
How long to bake frozen salmon at 350?
Plan for roughly 20 to 38 minutes depending on thickness, about 50 percent longer than the same cut would take fresh. Thin frozen fillets land toward the shorter end and thick frozen center cuts toward the longer end. Always confirm with a thermometer since frozen fish cooks less predictably than thawed.
Should I cover salmon with foil when baking?
Foil helps retain moisture and is a reasonable choice for thin or lean fillets, but it will add a few minutes to the bake and won’t give you as much browning on top. Uncovered baking browns faster and finishes a bit sooner. Either method works; the choice comes down to texture preference.
What temperature should salmon be when done?
The USDA Food Safety and Inspection Service lists 145F as the safe minimum internal temperature for fish. Many cooks pull salmon a bit below that, in the 125-135F range, for a softer, more moist texture, which is a personal preference rather than a food-safety recommendation. Check the USDA’s temperature table directly if you want the official figure confirmed in writing.
Practical Recommendation
Start with the thickness row that matches your fillet, check a few minutes before the low end of the range, and let a thermometer make the final call rather than the clock or how the fish looks on top. If you’re baking from frozen, add the extra time up front instead of checking constantly, since repeated oven door openings cool the oven down and stretch the total time even further.