It's probably safe to drink. Whether or not it is good depends. The chief dangers are oxidation, which will cause a lingering burn on the back of your throat, or the growth of acetic acid bacteria, which will make it taste like vinegar.
If it is sitting on lees, I would rack it off the lees rather than straining it. Straining it introduces more oxygen, which is bad at this point.
Take a sample and mix in a little sugar. See how it tastes. If it tastes good, stabilize and backsweeten, and bottle it.