Tide times are not constant! They relate the position of the moon thus you will have to
consult local marina or maybe even local newspaper, such as the Honolulu Star-Bulletin,
to obtain the tides for the time of your visit! Otherwise you might use these two web
sites, this is the tide prediction for Honolulu:
http://tbone.biol.sc.edu/tide/tideshow.cgi?site=Honolulu%2C+Oahu+%28Hawaii%29