How To Bbq Fish in Foil on Gas Grill
1. Choosing the Right Fish
Almost any type of fish can be grilled in foil. Choose firm, fresh fillets or whole fish that can hold their shape under heat.
| Type of Fish | Texture | Ideal For Foil Grilling |
|---|---|---|
| Salmon | Rich and oily | Excellent |
| Tilapia | Mild and delicate | Great with citrus marinades |
| Cod | Flaky and lean | Best with butter and herbs |
| Snapper | Medium-firm | Ideal for whole fish |
| Trout | Soft, flavorful | Works well with lemon and dill |
If grilling whole fish, make shallow diagonal cuts on both sides to help the heat penetrate evenly.
2. Preparing the Foil Packets
Tear a sheet of heavy-duty aluminum foil about 18 inches long for each serving.
Lightly brush the center with oil or butter to prevent sticking.
Place the fish fillet (or whole fish) in the center.
Add seasonings, herbs, and aromatics such as:
Lemon slices
Fresh dill, parsley, or thyme
Garlic or shallots
Salt, pepper, and olive oil drizzle
Fold the foil over the fish, sealing the edges tightly to form a packet. Leave a little room for steam expansion.
| Ingredient | Function |
|---|---|
| Olive oil or butter | Keeps fish moist |
| Lemon slices | Adds acidity and aroma |
| Fresh herbs | Enhances natural flavor |
| Salt & pepper | Balances seasoning |
| Garlic | Adds depth and fragrance |
3. Preheating the Gas Grill
Preheat your gas grill to medium heat (375–400°F / 190–205°C) with the lid closed for about 10 minutes. Clean and oil the grates for smooth, even cooking.
4. Grilling Time and Temperature
Place the foil packets on the grill grates over indirect heat (turn off one burner and place the packets on that side). Close the lid to retain heat and steam.
| Fish Type | Thickness | Cooking Time | Internal Temperature |
|---|---|---|---|
| Thin fillets (tilapia, flounder) | ½ inch | 8–10 min | 145°F / 63°C |
| Medium fillets (salmon, cod) | ¾–1 inch | 12–15 min | 145°F / 63°C |
| Whole fish (trout, snapper) | — | 18–20 min | 145°F / 63°C |
Tip: Do not flip the packets—let the trapped steam cook the fish evenly inside.
When done, the fish should flake easily with a fork and appear opaque in the center.
5. Step-by-Step Grilling Method
Preheat grill to 375–400°F.
Prepare foil packets with seasoned fish and seal tightly.
Place packets on indirect heat zone.
Grill for 10–20 minutes depending on thickness.
Carefully open the foil, allowing steam to escape safely.
Serve immediately with sauce, vegetables, or rice.
| Step | Action | Result |
|---|---|---|
| 1 | Preheat grill | Ensures even cooking |
| 2 | Prepare foil with fish | Locks in flavor and moisture |
| 3 | Grill with lid closed | Traps steam for tenderness |
| 4 | Rest 2–3 min before serving | Keeps juices intact |
6. Flavor Variations
Mediterranean Style: Olive oil, garlic, lemon, oregano, and cherry tomatoes.
Asian Style: Soy sauce, ginger, sesame oil, and green onions.
Butter Herb Mix: Melted butter, dill, and black pepper.
Spicy Cajun: Paprika, chili flakes, and lime juice.
These marinades can be added directly to the foil packets before sealing.
7. Serving Ideas
Grilled fish in foil pairs beautifully with:
Grilled vegetables or corn on the cob
Steamed rice or couscous
Fresh salad with vinaigrette
Garlic bread or roasted potatoes
You can also serve the fish directly from the foil for a rustic BBQ presentation.
8. Helpful BBQ Tips
Use heavy-duty foil to prevent tearing or leaks.
Don’t overcook: Fish continues to cook slightly after removing from the grill.
Open carefully: Steam inside the packet is very hot.
Add sauce at the end: A drizzle of lemon butter or olive oil enhances moisture.
Keep the lid closed during grilling to maintain stable temperature.
9. Conclusion
BBQ fish in foil on a gas grill takes 10–20 minutes depending on the cut and thickness. The foil locks in juices and flavor, producing soft, perfectly cooked fish with minimal effort. With a reliable gas BBQ grill from TopGrill Outdoor, you can maintain even heat and cook multiple foil packets at once—making it ideal for family meals or outdoor gatherings with consistent, delicious results every time.