Oven Temperature Guide for Cooking Fish

Fish is one of the quickest and most rewarding things to cook in the oven — but it's also one of the easiest to overcook. Getting the temperature right means the difference between moist, flaky fish and a dry, rubbery disappointment. Here's your complete guide.

Why Fish Needs Lower Temperatures Than Meat

Fish has delicate muscle fibres and a much lower fat content than most meats. It cooks quickly and continues cooking from residual heat even after leaving the oven. Most fish is perfectly cooked at an internal temperature of just 60–63°C (140–145°F) — far lower than chicken or pork.

General Oven Temperature Rule for Fish

• Standard baking / roasting: 180–200°C / 350–400°F
• Gentle / slow cooking: 150–160°C / 300–320°F
• High heat for crispy skin: 200–220°C / 400–425°F (short time)

Oven Temperature Guide by Fish Type

Salmon

• Salmon fillet (standard): 180°C / 350°F — 12–15 mins for a 200g fillet | Internal temp: 60°C (140°F)
• Salmon fillet (slow-baked, very moist): 120–130°C / 250–265°F — 25–30 mins
• Whole salmon: 180°C / 350°F — 10 mins per 500g

Cod and White Fish (Haddock, Pollock, Sea Bass)

• Fillet: 190–200°C / 375–400°F — 10–15 mins depending on thickness | Internal temp: 63°C (145°F)
• Whole fish: 180°C / 350°F — 10–12 mins per 500g

Trout

• Whole trout: 180°C / 350°F — 20–25 mins for a medium fish
• Fillet: 190°C / 375°F — 10–12 mins

Tuna Steak

• Rare to medium-rare: 200°C / 400°F — 6–8 mins | Internal temp: 45–50°C (115–120°F)
• Well done (not recommended — becomes dry): 180°C / 350°F — 12–15 mins

Prawns and Shellfish

• Prawns / shrimp: 200°C / 400°F — 8–10 mins until pink and opaque
• Scallops: 200°C / 400°F — 8–10 mins
• Mussels / clams (in sauce): 200°C / 400°F — 10–12 mins until shells open

Breaded and Battered Fish

• Breaded fish fillets / fish fingers: 200–220°C / 400–425°F — 15–20 mins, turning halfway
• Fish pie topping (mashed potato): 190°C / 375°F — 25–30 mins until golden

How to Tell When Fish Is Done

• The flesh turns from translucent to opaque
• It flakes easily when pressed gently with a fork
• Internal temperature reaches 60–63°C (140–145°F) for most fish

Use a Meat Thermometer for Precision

Because fish cooks so quickly and the window between perfect and overcooked is narrow, a digital thermometer is invaluable. The Alpha Grillers Digital Instant Read Meat Thermometer gives you an accurate reading in seconds — perfect for checking fish fillets without cutting them open and losing moisture.

Tips for Perfectly Cooked Fish Every Time

• Bring fish to room temperature for 10–15 minutes before cooking for more even results
• Pat fish dry before seasoning — moisture on the surface causes steaming instead of roasting
• Use a lined baking sheet to prevent sticking and make cleanup easy
• Don't overcrowd the pan — fish needs space for heat to circulate
• Remove fish from the oven 1–2 minutes before it looks fully done — residual heat finishes the cooking

Summary

Most fish cooks best at 180–200°C (350–400°F) for 10–15 minutes depending on thickness. Use a digital thermometer to check for an internal temperature of 60–63°C (140–145°F), and remove from the oven slightly early to account for residual heat.