By Bill Ohaire | Published: April 2026 | Last Updated: April 2026
Quick Answer
BBQ Leg of Lamb for Sear 3-4 min/side then indirect over direct heat at 160-180°C (325-350°F). Internal temp: 63-65°C (145-150°F). Rest for 20-30 min (tented with foil).
Leg of Lamb BBQ Cooking Times
Here is everything you need to know about cooking leg of lamb on the BBQ. We cover direct grilling, indirect heat, and smoking times with temperatures in Celsius (and Fahrenheit) so you get perfect results every time.
| Method | Temperature | Time |
|---|
| Direct Grilling | 160-180°C (325-350°F) | Sear 3-4 min/side then indirect |
| Indirect Heat | 160-180°C (325-350°F) | 1.5-2 hours at 160°C (325°F) |
| Smoking | 107-121°C (225-250°F) | 4-5 hours at 120°C (250°F) |
Thickness: 2-3kg bone-in | Rest time: 20-30 min (tented with foil)
Internal Temperature Guide
Use a calibrated digital meat thermometer for accuracy. Insert the probe into the thickest part of the meat, away from bone or fat pockets, which can give false readings.
| Doneness | Internal Temperature |
|---|
| Rare | 52-54°C (125-130°F) |
| Medium-Rare | 57-60°C (135-140°F) |
| Medium | 63-65°C (145-150°F) |
| Medium-Well | 68°C (155°F) |
| Well Done | 71°C+ (160°F+) |
Food Safety
Whole muscle cuts of lamb are safe at 63°C (145°F) with a 3-minute rest, according to food safety authorities. Use a calibrated meat thermometer in the thickest part, away from bone.
Tips for Perfect Leg of Lamb
Pro Tip
Butterfly the leg for faster, more even cooking. Stud with garlic slivers and rosemary sprigs. Perfect for Christmas and Easter BBQs in Australia.
Temperature accuracy matters more than timing. Factors like wind, ambient temperature, grill type, and meat thickness all affect cook times. Always verify doneness with a thermometer rather than relying solely on the clock. — AmazingRibs.com
Common Mistakes to Avoid
- Not butterflying — uneven thickness = uneven cooking
- Overcooking the thinner parts while waiting for thick parts
- Not using a meat thermometer in the thickest section
How to BBQ Leg of Lamb — Step by Step
- Prep: Bring the leg of lamb to room temperature 20-30 minutes before cooking. Pat dry with paper towel and season generously.
- Preheat: Get your BBQ to 160-180°C (325-350°F). Set up a two-zone fire with direct and indirect heat areas.
- Cook: Place over direct heat and cook for Sear 3-4 min/side then indirect. Flip once.
- Check temp: Use a digital thermometer. Target 63-65°C (145-150°F) in the thickest part.
- Rest: Remove from heat and rest for 20-30 min (tented with foil) before cutting or serving. The internal temperature will rise 2-3°C during rest.
Compare: Other Lamb Cuts
See how leg of lamb compares to other popular lamb cuts on the BBQ:
Lamb Loin Chops
3-4 min/side
220-250°C (425-480°F)
Lamb Cutlets (French-trimmed)
2-3 min/side
230-260°C (450-500°F)
Lamb Shoulder
6-8 hours at 110°C (225°F)
120-150°C (250-300°F)
View all cooking times →
Try Our BBQ Cook Time Calculator
Get precise cooking times for any meat, cut, and method. Never over-cook or under-cook your BBQ again.
Open Calculator
Frequently Asked Questions
How long do you BBQ leg of lamb?
Grill leg of lamb for Sear 3-4 min/side then indirect over direct heat at 160-180°C (325-350°F). Always use a meat thermometer to check the internal temperature reaches 63-65°C (145-150°F).
These times assume 2-3kg bone-in thickness at room temperature. Colder meat straight from the fridge can add 25-50% more time. Wind, lid position, and fuel type also affect total cook time significantly.
Source: AmazingRibs.com — The Science of BBQ
What temperature should leg of lamb be when cooked?
The safe internal temperature for leg of lamb is 63-65°C (145-150°F). Use a digital meat thermometer inserted into the thickest part of the meat, away from any bone.
Whole muscle cuts are safe at lower temperatures than minced products because bacteria only exists on the exterior surface, which is killed by searing.
Source: Food Standards Australia New Zealand
How long should leg of lamb rest after BBQ?
Rest leg of lamb for 20-30 min (tented with foil) after removing from the BBQ. This allows the juices to redistribute throughout the meat, resulting in a juicier, more flavourful result. The internal temperature will continue to rise 2-3°C during this time.
Resting works because heat drives moisture towards the centre of the meat during cooking. As the meat cools slightly during rest, the muscle fibres relax and reabsorb that moisture evenly. Cutting too early means those juices pour onto your board instead of staying in the meat.
Source: Serious Eats — The Food Lab
Should I cook leg of lamb on high or low heat?
Cook leg of lamb over medium-high direct heat (160-180°C (325-350°F)) for the best sear and flavour.
High heat creates the Maillard reaction — the complex browning that produces hundreds of flavour compounds on the surface. This requires temperatures above 140°C (285°F) and dry surfaces.
Source: Meat & Livestock Australia
Related BBQ Guides
Sources & References
1
Weber Grill Skills
Weber Australia's guides for grilling lamb on gas and charcoal.
Manufacturer
3
AmazingRibs.com
Science-based lamb grilling guides and internal temperature charts.
Reference
