Internal Temperature Of Pork Tenderloin On The Grill | 145°F

Pork tenderloin is done when the center reaches 145°F, then rests for 3 minutes before slicing.

Pork tenderloin on the grill can turn out beautifully juicy, or dry enough to need a glass of water with every bite. The line between those two results is thin, and it usually comes down to one thing: the temperature in the center of the meat.

This cut is lean, narrow, and quick to overcook. It also fools a lot of people because the outside can look ready long before the middle gets there. If you want grilled pork tenderloin that stays moist, slices cleanly, and still lands in the safe zone, 145°F is the number to watch.

Internal Temperature Of Pork Tenderloin On The Grill And The 145°F Rest Rule

The target for pork tenderloin is 145°F in the thickest part. Then it needs a short rest. That rest isn’t just for juicier slices. It’s part of the full cooking process, which is why you’ll often see the rule written as 145°F plus 3 minutes.

Pork tenderloin is a whole-muscle cut, so it follows the same endpoint as pork chops and roasts. That makes it different from ground pork, which needs a higher finish. It’s also different from pork loin, which is larger, thicker, and slower to cook on the grill.

If you’ve been taught to cook pork until it turns gray from edge to edge, that old habit is what dries this cut out. A tenderloin pulled at the right number can still have a faint blush in the center after resting. That’s not a problem if the thermometer says it’s done.

How To Check The Center Without Guessing

Where The Probe Should Go

Insert an instant-read thermometer into the thickest part of the tenderloin and aim for the center. Don’t check near the thin tail end. Don’t let the tip ride against the grate. You want the coolest point inside the meat, because that’s the last part to finish.

When To Start Checking

Start checking once the pork looks close, not once it looks fully done. On most grills, that means you’ll begin reading the center when it has good color on the outside and feels slightly springy when pressed. If you wait until it feels firm all over, you’re usually late.

The current safe minimum internal temperature chart lists pork steaks, roasts, and chops at 145°F with a 3-minute rest. That’s the number to trust, not color, juices, or grill time alone.

Center Temperature	What It Tells You	What To Do Next
110°F to 120°F	Still early; the middle is raw and cool	Keep cooking over lower heat
125°F to 130°F	Approaching the finish line	Check every couple of minutes
135°F	Close enough that carryover starts to matter	Watch closely and avoid high direct heat
140°F	Almost there	Use short cooking bursts, then recheck
145°F	Done for pork tenderloin	Remove from grill and rest 3 minutes
150°F	Still good, but a bit less juicy	Slice after a brief rest
155°F	Noticeably firmer	Serve with sauce or resting juices
160°F and up	Easy to dry out	Slice thin and add moisture at serving

Grill Setup That Helps Pork Tenderloin Stay Juicy

You don’t need a fancy method. You just need control. Pork tenderloin does best when the grill gives you a hotter side for browning and a cooler side for finishing.

• Trim off any silver skin so the meat doesn’t tighten up.
• Pat the surface dry so it browns instead of steams.
• Oil the grates, not the pork.
• Cook over mixed heat rather than blasting it the whole time.

Use Direct Heat First, Then Back Off

Start over medium-high heat to build color. Turn the tenderloin often so one side doesn’t take all the heat. Once the outside looks good, move it to a cooler zone and let the center creep up to the finish. That slower last stretch helps the meat cook more evenly from edge to center.

Thickness Matters More Than Minutes

One tenderloin may hit 145°F fast, while another needs several more minutes, even if their weights look close. The thicker one cooks slower. The grill’s lid position, wind, and grate temperature also shift the timing. That’s why a clock can only give you a rough idea.

The USDA’s Fresh Pork From Farm to Table page also points back to using a thermometer for pork and gives handling and cooking notes that line up with the 145°F target.

What The Rest Does After The Pork Leaves The Grill

Resting does two jobs. First, it gives the heat already in the outer layers time to move inward. Second, it gives the juices a chance to settle so they stay in the slices instead of flooding your cutting board.

Set the tenderloin on a plate or board and leave it alone for at least 3 minutes. Loose foil is fine if the weather is cool, but don’t wrap it tight. Tight wrapping traps too much heat and can push the meat past the sweet spot.

Common Problem	Why It Happens	Better Move
Burnt outside, raw center	Heat stayed too high the whole cook	Sear first, then finish over cooler heat
Pale outside, done center	Surface was wet or grill wasn’t hot enough	Dry the meat well and preheat longer
Dry slices	Pull temperature went too high	Take it off at 145°F, not by color alone
Juices all over the board	It was cut too soon	Rest at least 3 minutes before slicing
Uneven doneness	Probe checked the wrong spot	Read the thickest center point

Simple Signs You’re Close, But Not Done Yet

The surface will firm up before the center does. That’s normal. You may also see the thinner end cooking faster than the thick middle. Don’t chase a uniform look from tip to tip. Chase the center reading.

If you want cleaner slices, cut across the grain after resting. If you want the pork to feel even juicier, spoon any resting juices back over the top right before serving. Small moves like that matter more than extra seasoning once the meat is cooked well.

If your thermometer needs a placement refresher, USDA FSIS has a clear page on food thermometers, including where the tip should sit in roasts and other cuts.

What To Do If You Miss The Number

If You Pull It Early

Put it back on the cooler side of the grill, close the lid, and check again in a minute or two. Don’t throw it straight over blazing heat unless the outside still needs color.

If You Overshoot A Little

If the center lands at 150°F or so, it can still eat well. Slice it a bit thicker, keep the resting juices, and pair it with a sauce or glaze. The damage usually comes from pushing it much farther, not from missing by a few degrees.

If You Don’t Have A Thermometer

You can grill pork tenderloin without one, but you’re guessing. This cut is too lean and too narrow for that to work well every time. A basic instant-read thermometer pays for itself fast because it keeps you from ruining good meat.

Get The Pull Point Right

The best internal temperature of pork tenderloin on the grill is 145°F in the center, followed by a 3-minute rest. That’s the spot where safety, texture, and juiciness line up.

Once you trust the number instead of the color, grilled pork tenderloin gets much easier. Sear it, finish it gently, rest it, and slice it only after the center says it’s ready.