Two quotes from the web:
"When the moon is full or new, the gravitational pull of the moon and sun are combined. At these times, the high tides are very high and the low tides are very low."
"An eclipse of the Moon (or lunar eclipse) can only occur at Full Moon
Tides built up here in NYC, up to 4.8 ft in height near dawn of the 5th.
01/01/2004 Thu 03:00AM LST 4.3 H
01/02/2004 Fri 03:51AM LST 4.4 H
01/03/2004 Sat 04:41AM LST 4.5 H
01/04/2004 Sun 05:27AM LST 4.7 H
01/05/2004 Mon 06:10AM LST 4.8 H