I regularly enter 1.5 hrs before high tide without issue. I stay along the snorkel trail early and don't venture toward either side (west span or east span) until closer to 45 min before high tide roughly. I've never had an issue with the current not being manageable. Black Friday (yesterday) I got in at 8:30 am and high tide was 10:04 am. Current was manageable and the viz gradually improved as high tide approached. I did a 2h10m dive. My longest dive currently at the bridge is 2h30m on a HP100.