Ocean Clocks Tide and Time Clocks offer a unique design and perspective on local high tide and low tide information.

Ocean Clocks localized design focuses on displaying the high tide, low tide relationships in a local area. Much like a local tide chart, or tide table, Ocean Clocks tide and time clocks display this information graphically - by displaying the relative tide at points along a specific coastal region.

For example, our Cape Cod tide time clock displays high and low tide at 20 points in the Massachusetts coastal area - making sense of the high/low tide relationship between these points, in an easy to use format on the clock dial.

To further localize the clock, the dial contains an authentic nautical chart specific to the area displayed. This combination creates the most unique tide clock available anywhere.

How Ocean Clocks Tide Clocks work:

The moon has the major influence that causes the tidal changes to advance every day. The position of the sun and local land masses also has some affect on our tides. The time it takes for the moon to orbit the earth is approximately 24hrs, 50mins and it is this time that we have geared into the mechanism to operate the Blue Tide Hand in the movement.

The blue tide hand will track the moon's orbit and so we are able to approximately predict the tides. The tide time differences between all of the ports have been calculated to predict the high tides before and after the major port in your region. This information can generally be found in your daily newspaper or in local tide tables but we have worked it out for you and display this information on our clock faces together with a Nautical Chart of your region.

Ocean Clocks Tide Clock accuracy:

The moon and sun create some gravitational affect on tide, as does heavy weather. In Semi-Diurnal regions (Areas of approximately two equal tides) the tide times indicated will normally be accurate to approximately plus or minus 45 minutes, as these influences take effect (90 Mins for Puget Sound, WA.).

The accuracy is also influenced by the actual moment you set the tide hand (blue hand on the dial). Check the tide time at various intervals and if you find the times greater than one hour before or after the correct time, adjust the tide hand to give you an equal oscillation. One interim adjustment is all that may be required and your tide times will keep within this tolerance band. Setting the tide hand on the first day of a full or new moon will center the tide time for the major port in the middle of the tolerance band.

(Note: Ocean Clocks are not to be used for navigation, merely for tidal prediction or approximation. No responsibility is taken for use other than intended.)

Setting Instructions for Ocean Clocks Tide Clocks:

Your clock will be most accurate when set on the day after Full or New Moon. Remove the battery. Adjustment should be done in a clockwise direction only. Set time hands to correspond to the time of the previous high tide for the main Port then turn the tide-adjusting wheel only so that the blue hand is set to that main Port. Using the time adjustment only, re-set clockwise to the current time, you will see that the tide hand will move accordingly. Replace the battery. For daylight saving, adjust the time then re-set the tide hand back to its original position.