RaceAtlas

Alcatraz Island Tides: Friday, December 31, 2021

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

2.6 ft2:29 AM6.9 ft8:51 AM-1.2 ft3:54 PM4.8 ft11:08 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 6.9 ft at 8:51 AM, low -1.2 ft at 3:54 PM. Gate: flood 3.1 kt at 6:40 AM, ebb 1.8 kt at 12:53 PM.
Modelled current at the Golden Gate on a 3.1 kt floodThe Gate at max flood, 3.1 kt
Tide height
TimeHeight
2:29 AMLow2.6 ft
8:51 AMHigh6.9 ft
3:54 PMLow-1.2 ft
11:08 PMHigh4.8 ft
Current · Golden Gate
TimeStateSpeed
1:20 AMmax ebb SW (235°)0.9 kt
3:30 AMslack–
6:40 AMmax flood ENE (074°)3.1 kt
9:57 AMslack–
12:53 PMmax ebb SW (235°)1.8 kt
5:06 PMslack–
8:24 PMmax flood ENE (074°)2.9 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.