Generally the entry at all sites is good at higher tides. 

Sites that have shallow entry and require some walking during low tide are: Aipelu Beach, Christo Rei, Black Rock, and Secret Spot

Dili Rock, Bubble Beach and K41 have better visibility when the tide is lower as sand is stirred up less.

Black Rock has tricky currents but generally, 2 hours before high tide, the currents are not as strong.