RaceAtlas

Alcatraz Island Tides: Wednesday, April 21, 2021

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

3.0 ft1:50 AM4.6 ft7:01 AM-0.0 ft2:04 PM4.6 ft9:28 PM0 ft2 ft4 ft12 AM6 AM12 PM6 PM12 AM
High 4.6 ft at 7:01 AM, low -0.0 ft at 2:04 PM. Gate: flood 2.4 kt at 6:32 PM, ebb 1.1 kt at 11:35 AM.
Modelled current at the Golden Gate on a 2.4 kt floodThe Gate at max flood, 2.4 kt
Tide height
TimeHeight
1:50 AMLow3.0 ft
7:01 AMHigh4.6 ft
2:04 PMLow-0.0 ft
9:28 PMHigh4.6 ft
Current · Golden Gate
TimeStateSpeed
12:02 AMmax ebb SW (235°)0.5 kt
1:56 AMslack–
4:54 AMmax flood ENE (074°)1.6 kt
8:33 AMslack–
11:35 AMmax ebb SW (235°)1.1 kt
2:49 PMslack–
6:32 PMmax flood ENE (074°)2.4 kt
10:49 PMslack–

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.