ABOUT TIDES: The Moon's gravity tugs at the Earth, causing ocean water to slosh back and forth in predictable waves called tides. We can visibly observe some of that energy dissipate at the beach, with waves rolling across coastal shallows and shoals. Most of the energy dissipates due to friction between the water and the shallow floor beneath it.
Tides are the alternating rise and fall of sea level with respect to land, as influenced by the gravitational attraction of the moon and sun. Other factors influence tides; coastline configuration, local water depth, seafloor topography, winds, and weather alter the arrival times of tides, their range, and the interval between high and low water. A tide prediction can differ from the actual sea level that will be observed as a result of the tide. Predicted tidal heights are those expected under average weather conditions. When weather conditions differ from what is considered average, corresponding differences between predicted levels and those actually observed will occur. Generally, prolonged onshore winds (wind towards the land) or a low barometric pressure can produce higher sea levels than predicted, while offshore winds (wind away from the land) and high barometric pressure can result in lower sea levels than predicted. Thus mariners, surfer and beachgoers need to take local conditions into account when considering critical activities with tide prediction information.
The primary forces that create tides can be predicted, many other factors are at work that make this information just "predictions." We do not want anyone to have a false sense of "accuracy" that leads to a flase sense of "security." Along with coastal topography, the main factor that can have a major influence in the difference in predictied times and the observed times is meteorlogical conditions. A strong and consistent wind in any direction, but especially onshore, can increase the tide height and hasten an earlier height time. Low pressure in the area can increase tide heights, while high pressure can have the opposite effect by decreasing tide heights. Many of the experts out there say that tide times are generally considered accurate if they occur within 20 minutes of the published times. While tides heights should be within 0.3 feet. To get the data for many of the tide locations in Hawaii, tide time and height corrections are applied to harmonic stations which have regular water level readings taken by automated tide stations, such as Honolulu..
While we take a lot of care to make all of the information on our site as accurate as possible, we can't guarantee the accuracy of this tide data or be held responsible for any consequences arising from its use. Do not put life or property at risk based on this data.