For medium rare beef Wellington, cook to 125 degrees F. u003cbr/u003eu003cbr/u003eBeef Wellington is medium rare at 135 degrees, which in our opinion, is the perfect temperature - however, that is the finished temperature for beef Wellington. Since roasts are so large, they tend to carryover cook quite a bit after removing from oven. To get perfect medium rare, you actually need to cook to 125 degrees - so it can carryover cook to 135 as it rests. u003cbr/u003eu003cbr/u003eIf you're looking for a different doneness, use the guide below: u003cbr/u003e125 degrees - medium rareu003cbr/u003e140 degrees - mediumu003cbr/u003e150 degrees - well doneu003cbr/u003e