Bake tilapia at 400°F (205°C) until it flakes easily with a fork and reaches 145°F (62°C) inside, usually about 10–15 minutes for fillets and around 15 minutes for a whole fish.

Ideal Temperature & Time

  • Best oven temperature: 400°F (205°C) gives tender, flaky tilapia without drying it out.
  • Internal doneness: Cook until the thickest part hits 145°F (62°C).
  • Fillets: About 10–15 minutes, depending on thickness.
  • Whole tilapia: Around 15 minutes at 400°F, sometimes a bit longer if large.

A quick visual check: the flesh turns opaque white and flakes apart easily with a fork when it’s done.

Simple Step‑By‑Step (Quick Scoop Style)

  1. Preheat oven to 400°F (205°C).
  1. Season tilapia with salt, pepper, and any spices (garlic, paprika, herbs, lemon juice all work well).
  1. Arrange fillets or whole fish in a lightly oiled or buttered baking dish.
  1. Bake :
    • Fillets: start checking at 10 minutes.
    • Whole fish: start checking around 15 minutes.
  1. Check doneness :
    • Thermometer reads 145°F in the thickest part.
    • Fish is opaque and flakes easily with a fork.

Quick Variations by Oven Temp

If you need to adjust for other dishes in the oven:

  • 375°F (190°C): Tilapia will take a bit longer; start checking around 15–20 minutes for fillets.
  • 350°F (175°C): Common for gentler baking; expect closer to 20 minutes depending on thickness.

Still use 145°F internal temp and flakiness as your final guide.

Mini Flavor Ideas

  • Garlic‑lemon butter: Melt butter with garlic, lemon juice, and zest, pour over fillets, then bake at 400°F.
  • Herb & paprika: Sprinkle paprika, thyme, oregano, salt, and pepper over tilapia, add a little oil or butter, and bake.
  • Whole fish, “less fishy” taste: A mustard‑vinegar style marinade helps keep a whole tilapia moist and mild at 400°F.

TL;DR: Set your oven to 400°F (205°C), bake tilapia until it’s opaque, flakes easily, and hits 145°F in the center—usually 10–15 minutes for fillets, about 15 for a whole fish.

Information gathered from public forums or data available on the internet and portrayed here.