Factual error: The scene where the Japanese planes are taking off from their carriers shows a mix of aircraft in motion, mainly reproductions of the Zero, Kate, and Val aircraft that were used. In the actual event, the Zeros always left first as they needed the least space, and the heavier planes last. This is not the case in the film.
Factual error: The radar installation at Opana Point on Oahu was a newly developed Westinghouse type scr-270. This is not the one shown in the movie, which is of more recent vintage.
Factual error: When the female civilian pilot is teaching a student, they are shown flying in a Boeing Stearman biplane. The actual plane in that event was an Interstate Cadet S-1A, a high wing monoplane. The instructor was Cornelia Fort who later became the second WASP. She was killed 21 March 1943 while ferrying an aircraft, becoming the first female pilot killed in WW2.
Factual error: At least twice in the movie you can see across the harbor a ship with the number 1048 on its bow. That ship is the USS Sample, which wasn't commissioned until 1968.
Continuity mistake: When Admiral Kimmel is chatting with the naval officer and General Short about how to counter a Japanese attack, you will see a table in the background near the window that is set up with the leaves fully extended and chairs in front and at both ends. When the camera pans to the window towards the end of the scene, the table has been compacted and the chairs moved.