Better still: It is even WRITTEN "fort" (and is proncounced "for").
As long as you are referring to a MALE person, of course.
"forte" as a word all by itself in French only exists in the sense of a MUSICAL "forte" (i.e. loudness too)
As for your pronunciation, never mind if it is "for-tay" or "for-tee", but if somebody would like to point out, for example, that "spelling is not my strong point", do you actually expect him to state something that sounds like "spelling is not my fortified 19th century Far West soldier outpost"?
C'mon ...
No, seriously, except in certain female variants of the word that means "strong" in all shadings (including a strong = loud voice) the French language has no such "forte" as you imply.
I don't know about French, but my dictionary - Merriam-Webster's Collegiate - gives the first pronunciation of forte as fort. It says that for-tay is also used. My wife corrected me some years ago when I said for-tay, and I've said fort ever since. I sometimes get the feeling that people think it's pretentious or just plain wrong, but I don't care.
Here's a common one - Febuary.