RaceAtlas

Alcatraz Island Tides: Tuesday, December 21, 2021

Tide heights at Alcatraz Island with the flood, ebb and slack schedule at the Golden Gate.

4.7 ft2:07 AM3.4 ft6:23 AM5.9 ft12:06 PM-0.5 ft7:11 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 5.9 ft at 12:06 PM, low -0.5 ft at 7:11 PM. Gate: flood 2.6 kt at 11:53 PM, ebb 1.5 kt at 4:31 PM.
Modelled current at the Golden Gate on a 2.6 kt floodThe Gate at max flood, 2.6 kt
Tide height
TimeHeight
2:07 AMHigh4.7 ft
6:23 AMLow3.4 ft
12:06 PMHigh5.9 ft
7:11 PMLow-0.5 ft
Current · Golden Gate
TimeStateSpeed
3:42 AMslack–
5:28 AMmax ebb SW (235°)0.5 kt
7:13 AMslack–
10:15 AMmax flood ENE (074°)2.3 kt
1:24 PMslack–
4:31 PMmax ebb SW (235°)1.5 kt
8:28 PMslack–
11:53 PMmax flood ENE (074°)2.6 kt

Not for navigation. These are harmonic predictions, not live measurements. Tide heights: station 9414792 (Alcatraz Island). Currents: station SFB1203 (San Francisco Bay Entrance, Golden Gate). · RaceAtlas, the SF Bay current atlas.