How Long to Boil Lobster Tails

By The Recipes by Mom kitchen · Last checked October 21, 2026 · Not kitchen-tested; see how our recipes are made

Boiling lobster tails takes about 1 minute per ounce. For a common 5 to 6 ounce tail, this means a cooking time of roughly 5 to 6 minutes in boiling, salted water. This timing is a reliable starting point for most home cooking.

The times in the chart apply to lobster tails that have been fully thawed before cooking. Using this guide helps prevent the lobster meat from becoming tough, which can happen if it is overcooked.

How Long to Boil Lobster Tails: time chart

Table source: Typical ranges from standard cooking practice, not an official chart. Ovens, grills and pieces vary: start checking at the low end of each range.

Good to know

• Thaw frozen tails in the fridge before cooking
• Overcooked lobster turns tough

What changes the timing

The primary factor determining how long to boil a lobster tail is its weight. Larger, heavier tails require more time in the boiling water for the heat to penetrate the meat and cook it through. A smaller, lighter tail will cook much more quickly. This is why the general guidance is based on weight, using a ratio of about one minute of boiling for each ounce.

Starting with frozen or partially frozen tails will also significantly change the cooking time. The times in the chart are for tails that are completely thawed. If you cook them from frozen, the outer meat may overcook and become tough before the inside is safely cooked. We suggest thawing frozen tails in the refrigerator before boiling.

How to tell when lobster is done

The most reliable way to check if a lobster tail is cooked is to use an instant-read thermometer. Shellfish should be cooked to an internal temperature of 145°F (63°C). Insert the thermometer into the thickest part of the tail meat, being careful not to touch the shell.

Visual cues are also helpful. When cooked, the shell of most lobster varieties will turn a bright red. The meat inside should change from translucent to a pearly, opaque white. If the meat is still see-through, it needs more time. Be careful not to overcook the lobster, as the meat will become tough. Checking early and often is better than leaving it in the water for too long.

Tips for better results

• Thaw completely: For even cooking, always thaw frozen lobster tails before boiling. The safest way is to leave them in the refrigerator. This prevents the outside from overcooking while the inside is still raw.
• Use a large pot: Choose a pot large enough to hold the lobster tails without crowding them. They should be fully submerged in the boiling water. This ensures that the water temperature remains stable and that the tails cook evenly.
• Salt the water: Adding salt to the boiling water seasons the lobster meat as it cooks.
• Avoid overcooking: Overcooked lobster is tough. It is better to check the lobster a minute early than to leave it in too long. You can always return it to the pot if it needs more time, but you cannot undo overcooking.

Sources and method

• USDA FSIS Safe Minimum Internal Temperature Chart
• Time ranges not marked as USDA are typical ranges from standard cooking practice

Last checked October 21, 2026.