RaceAtlas

Alcatraz Island Tides: Monday, December 21, 2026

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

2.9 ft2:04 AM6.7 ft8:23 AM-0.9 ft3:36 PM4.6 ft10:53 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 6.7 ft at 8:23 AM, low -0.9 ft at 3:36 PM. Gate: flood 2.9 kt at 6:11 AM, ebb 1.7 kt at 12:27 PM.
Modelled current at the Golden Gate on a 2.9 kt floodThe Gate at max flood, 2.9 kt
Tide height
TimeHeight
2:04 AMLow2.9 ft
8:23 AMHigh6.7 ft
3:36 PMLow-0.9 ft
10:53 PMHigh4.6 ft
Current · Golden Gate
TimeStateSpeed
12:44 AMmax ebb SW (235°)0.7 kt
2:50 AMslack–
6:11 AMmax flood ENE (074°)2.9 kt
9:33 AMslack–
12:27 PMmax ebb SW (235°)1.7 kt
4:43 PMslack–
8:03 PMmax flood ENE (074°)2.7 kt
11:49 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.