Alaska Tide Charts

High tide arrives at a different time at each station. Adak Bight reaches 3.59 ft at 10:26 am; Adugak Island reaches 3.59 ft at 10:53 am; Affleck Canal entrance reaches 11.6 ft at 2:28 pm. The table above lists the next high and the next low for all 516 Alaska stations.

Goose Creek, Knik Arm, Cook Inlet, where high and low water differ by 34.0 ft today. The smallest of the 511 Alaska stations with a range today is Applegate Cove, Chuginadak Island at 0.2 ft. Range varies along a coast because the shape of a bay or estuary amplifies or damps the same ocean tide.

Yes, at Adak Bight, Adugak Island, Affleck Canal entrance and 455 others. The lowest is -2.47 ft at 12:24 am. A minus tide is water below mean lower low water, the zero point for US predictions, and it exposes ground that is normally covered.

Not all alike. 466 are mixed semidiurnal and 50 are diurnal. Each station page classifies itself from its own predictions rather than from a regional rule, because the pattern changes along a single coast.

NOAA states roughly ten minutes on timing and half a foot on height for a reference station in ordinary weather. 257 of the 516 stations here are reference stations; the rest are subordinate, with times and heights derived from one by a published offset, so expect a little more spread. Weather is the bigger factor either way. A storm surge or a strong onshore wind can raise real water well above the prediction, which is astronomy only.