St. Augustine inlet is only dicey farther out, inside the first few markers where the shoaling is always shifting. A call to TowboatUS when approaching the sea buoy will give you up-to-date info on the best track to take.
Last time I went in, during the call I jokingly mentioned that I hoped I'd not be calling him back shortly. He said "Don't worry it's the ones that don't call ahead for info that end up in trouble".
General
rule: if you see less than 10' turn around and try a different line.