Cook pork loin to 145°F in the thickest center, then rest it 3 minutes so the final bite stays juicy and safe.
Pork loin is one of those cuts that can taste like a Sunday roast or like sawdust. The swing comes down to one thing you can control: internal temperature. Get that right and the rest falls into place—seasoning, crust, slices that stay tender, and leftovers you’ll still want tomorrow.
This guide gives you the numbers that matter, where to stick the thermometer, and how to hit the target on an oven tray, a grill, or a sous vide bath. You’ll also get a time chart to plan dinner, plus quick fixes when the loin runs hot or dries out.
Target Temperatures For Pork Loin By Doneness And Method
| Goal | Pull From Heat At | Serve At |
|---|---|---|
| USDA minimum for whole loin | 140–142°F | 145°F, rest 3 min |
| Light blush, extra moist | 138–140°F | 143–145°F, rest 5 min |
| Classic sliceable roast | 142–145°F | 147–150°F, rest 5–8 min |
| Firm slices for sandwiches | 147–150°F | 152–155°F, rest 8–10 min |
| Stuffed pork loin | 142–145°F | 145°F+, check stuffing hot |
| Thin loin chops (quick cook) | 140°F | 145°F, rest 3 min |
| Ground pork (not a loin, but common mix-ups) | 160°F | 160°F |
| Reheat cooked pork | 165°F in the thickest spot | Hot all the way through |
Cook Pork Loin At What Temperature? For Oven And Grill Results
If you want a single rule to tape inside a cabinet, it’s this: cook pork loin at what temperature? Start with 145°F in the center of the thickest part, then give it a rest. That 145°F standard for pork steaks, chops, and roasts is listed on the FSIS safe temperature chart.
The rest time is not a “nice to have.” It’s part of the safety guidance for whole cuts, and it also makes the meat taste better. A pork loin pulled at 140–142°F will often drift up a few degrees as it sits, landing right on 145°F while the juices settle back into the slices.
Why 145°F Works For Pork Loin
Modern guidance for whole pork cuts is built around internal temperature plus a short rest. Foodsafety.gov lists pork steaks, roasts, and chops at 145°F with a 3-minute rest time. That combo reduces foodborne risk while letting the meat stay tender and moist.
Color can fool you. Pork can look a little pink at 145°F and still be cooked through for safety. A thermometer beats guessing every time.
What Changes The Target
Pork loin is a lean muscle. Lean meat dries out as the temperature climbs. If you like softer, juicier slices, aim to serve near 145°F. If you want firmer slices for cold sandwiches, you can let it run into the low 150s, but you’ll trade off moisture.
Also separate “loin” from “shoulder.” Pork shoulder is built for higher end temps that melt collagen. Pork loin is built for a lower finish and a clean slice.
Thermometer Placement That Gives A True Reading
Most pork loin “fails” are thermometer issues. The tip needs to sit in the center of the thickest part, not kissing the pan, not buried in fat, and not poked into the seam where a tenderloin strip may be tied on.
Where To Insert The Probe
- Slide the probe in from the side, straight toward the center, so the tip ends up in the middle.
- Stay away from bone if you’re cooking a bone-in roast. Bone conducts heat and can read hotter than the meat.
- Check two spots: the thickest center and the next-thickest area. Use the lower number.
Fast Gear Check
If you’re not sure your thermometer is reading right, test it in a cup of ice water. It should read close to 32°F when the cup is packed with ice and a little water. Then you’ll trust the 145°F call when it matters.
Oven Method For A Juicy Pork Loin Roast
The oven is the steadiest way to cook a pork loin roast. You get even heat, easy timing, and space to roast potatoes or a tray of vegetables on a second rack.
Simple Roast Steps
- Pat the pork loin dry, then salt it all over. If you have time, salt it 30–60 minutes ahead so the surface dries a bit.
- Heat the oven to 375°F. Set a rack in the middle.
- Sear the loin in a hot skillet with a thin film of oil, 2–3 minutes per side, until the outside browns.
- Move the loin to a roasting pan or sheet with a rack. Insert the thermometer.
- Roast until the center reads 140–142°F, then pull it and rest 3–10 minutes based on your serving goal.
Pan Sauce In The Same Skillet
While the pork rests, pour off excess fat, keep the browned bits, then add a splash of broth and a spoon of mustard. Simmer, scrape, and taste. A squeeze of lemon or a spoon of jam can round it out without hiding the pork.
Grill Method With A Brown Crust And Tender Center
Grilling pork loin works best with two zones: one hot side for browning and one cooler side to finish gently. This keeps the outside from burning while the center creeps up to the target.
Two-Zone Steps
- Preheat the grill with one side on high and the other on low.
- Oil the grates. Brown the loin over high heat, turning to color each side.
- Move it to the cooler side, close the lid, and cook until 140–142°F in the center.
- Rest it, then slice across the grain.
Smoke And Rub Notes
A sweet rub with brown sugar can scorch on a hot grate. If you use sugar, brown the meat fast, then finish on the cooler side. Wood chunks like apple or cherry pair well with pork loin and won’t overpower it.
Sous Vide Method For Even Doneness Edge To Edge
Sous vide is the most forgiving way to keep pork loin even from edge to center. Set the bath to your serving temperature, then finish with a quick sear for color.
Time And Temperature
- Set the bath to 140–145°F for sliceable, moist pork loin.
- Cook 2–4 hours for a typical loin roast thickness.
- Dry the surface well, then sear hard and fast in a skillet to avoid overcooking.
Use the same safety targets. Foodsafety.gov lists pork steaks, roasts, and chops at 145°F with a rest time. Sous vide makes it easier to land there without overshooting.
Resting, Carryover Heat, And Slicing So Juices Stay Put
Resting is not dead time. It’s the final step that keeps the slices moist. Heat moves from the hotter outer layers toward the center, nudging the temp up. At the same time, pressure inside the meat drops, so the juices don’t flood the board when you cut.
How Long To Rest
- Small loins and chops: 3 minutes.
- Medium roasts: 5–8 minutes.
- Large roasts: 10 minutes.
How To Slice
Cut across the grain into slices that match your use. For plates, 1/2-inch slices stay juicy. For sandwiches, 1/8- to 1/4-inch slices stack cleanly. If the loin is tied, snip and remove the twine before slicing.
Timing Guide For Oven Roasts By Weight
| Loin Weight | Oven Temp | Typical Time To 140–142°F |
|---|---|---|
| 1.5–2 lb | 375°F | 35–55 min |
| 2–3 lb | 375°F | 50–75 min |
| 3–4 lb | 375°F | 70–95 min |
| 4–5 lb | 375°F | 90–120 min |
| 5–6 lb | 375°F | 110–145 min |
| 6–7 lb | 375°F | 130–170 min |
Use the table to plan, then let the thermometer make the call. Ovens run hot, pans change airflow, and one thick end can lag behind. If you want a second reference point, the USDA also answers the question “To what temperature should I cook pork?” with 145°F for steaks, chops, and roasts, plus a rest.
Seasoning Moves That Keep Pork Loin Tender
Pork loin has little fat, so seasoning needs to pull double duty: flavor and moisture. Start with salt. A light salt rest in the fridge for a few hours dries the surface and seasons deeper than a last-minute sprinkle. If you want a sweeter crust, add sugar to the outside right before cooking so it doesn’t draw too much surface moisture.
Marinades work best when they’re simple. Skip long soaks in strong acid; the outer layer can turn soft. If you want extra insurance, brush the roast with a thin coat of mayonnaise before searing. It browns well and keeps the surface from sticking.
Fixes For Common Pork Loin Problems
It Hit 155°F And Feels Dry
Slice it thin, then spoon warm pan sauce or broth over the slices. Pair it with a moist side like mashed potatoes or rice. For leftovers, reheat gently with a splash of stock and a tight lid so the steam keeps it tender.
The Center Is 135°F And Guests Are Hungry
Don’t crank the heat and scorch the outside. Put the loin back in at 350–375°F and check every 5–8 minutes. If you’re on the grill, move it to the cooler side and close the lid.
The Outside Is Dark But The Middle Is Behind
That’s a heat balance issue. Tent the roast loosely with foil and keep cooking at a lower oven temp, or shift it away from direct flame on the grill. Next time, start with a lower oven temp and finish with a short broil if you want a darker crust.
It Tastes Bland
Salt earlier. Pork loin is thick, so it needs time. A 30–60 minute salt rest before cooking makes a difference. You can also add a simple paste of garlic, salt, pepper, and a little oil to stick herbs to the surface.
Safe Handling And Leftovers Without Guesswork
Safe cooking starts before the oven turns on. Keep raw pork cold, keep the cutting board clean, and wash hands after handling the meat. For cooking targets across meats, the safe minimum internal temperature chart on foodsafety.gov is a solid reference.
Cooling And Storing
- Cool leftover slices fast: spread them on a plate so heat escapes, then cover and refrigerate.
- Store in a sealed container for up to 3–4 days.
- Freeze slices with a bit of broth in the bag so they reheat moist.
Reheating Without Turning It Chalky
Reheat covered in a low oven (275–300°F) with a splash of broth until hot, or warm slices in a skillet with a lid. When you reheat a big batch, bring the thickest pieces up to 165°F.
Quick Checklist For A Pork Loin You’ll Want To Make Again
- Dry the surface, then salt ahead if you can.
- Use a thermometer and aim to pull at 140–142°F.
- Rest it, then slice across the grain.
- Keep sauce ready: pan drippings, broth, mustard, and a touch of acid.
- If you ever catch yourself asking, “cook pork loin at what temperature?”, stick with 145°F plus a rest and you’ll be in good shape.