Biscayne National Park - Tide Predictions (U.S. National Park Service)

Time Differences:

To determine the time of high and low tide at any location listed in this table, look at the columns headed “Time Differences” in which the hours and minutes to be added or subtracted from the time of high or low tide at the Miami Harbor Entrance are listed. A plus sign (+) indicates that the tide at the location occurs later than at the Miami Harbor Entrance and the difference should be added; a minus sign (-) indicates that it is earlier and should be subtracted. To get the current tides at Miami Harbor Entrance

Height Differences:

The height of the tide, referred to the datum of nautical charts, is obtained by means of the height ratios (indicated by an asterisk *). To obtain the height of tide at the location, multiply the height of tide at the Miami Harbor Entrance by the ratio listed. The result is normally rounded to the nearest 0.1 foot.

Location	Differences Based on Tide Predictions for Miami Harbor Entrance
	Time Differences		Height Differences
	High Water (hr min)	Low Water (hr min)	High Water (ratio)	Low Water (ratio)
Soldier Key	+0 53	+1 20	* 0.74	* 0.75
Fowey Rocks	+0 01	+0 03	* 0.97	* 0.94
Ragged Keys, Biscayne Bay	+1 07	+1 25	* 0.66	* 0.66
Boca Chita Key, Biscayne Bay	+1 24	+1 43	* 0.63	* 0.63
Sands Key, northwest point, Biscayne Bay	+1 48	+2 30	* 0.58	* 0.56
Coon Point, Elliott Key, Biscayne Bay	+2 18	+3 00	* 0.57	* 0.57
Elliott Key Harbor, Elliott Key, Biscayne Bay	+2 19	+3 04	* 0.59	* 0.56
Turkey Point, Biscayne Bay	+2 33	+3 25	* 0.65	* 0.65
Convoy Point (Park Headquarters)	+2 33	+3 25	* 0.65	* 0.65
Billys Point, Elliott Key, Biscayne Bay	+2 31	+3 24	* 0.58	* 0.56
Sea Grape Point, Elliott Key	-0 02	-0 01	* 0.92	* 0.92
Christmas Point, Elliott Key	+0 36	+0 41	* 0.73	* 0.73
Adams Key, south end, Biscayne Bay	+1 24	+1 12	* 0.61	* 0.61
Totten Key, west side, Biscayne Bay	+2 42	+3 25	* 0.50	* 0.50
East Arsenicker, Card Sound	+2 49	+3 13	* 0.36	* 0.36