Heights of the tides on the vertical axis are shown in feet above mean low water.

Directly below each days' graph are two lines of numbers. The upper line indicates the height of the tide (in feet) for that particular high or low water. On the lower line are the times (Pacific Summer Time) at which the particular high or low water occurs. You should bear in mind that the numbers are only approximations; the strong resonant effects of the waters of the Sea of Cortez, coupled with the significant influence of the winds, may cause any one of these highs or lows to be off by 30-45 minutes.