RaceAtlas

Alcatraz Island Tides: Tuesday, December 9, 2025

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

5.1 ft3:56 AM3.0 ft8:48 AM5.6 ft2:23 PM-0.5 ft9:22 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 5.6 ft at 2:23 PM, low -0.5 ft at 9:22 PM. Gate: flood 3.0 kt at 12:57 AM, ebb 1.4 kt at 7:06 PM.
Modelled current at the Golden Gate on a 3.0 kt floodThe Gate at max flood, 3.0 kt
Tide height
TimeHeight
3:56 AMHigh5.1 ft
8:48 AMLow3.0 ft
2:23 PMHigh5.6 ft
9:22 PMLow-0.5 ft
Current · Golden Gate
TimeStateSpeed
12:57 AMmax flood ENE (074°)3.0 kt
5:06 AMslack–
7:31 AMmax ebb SW (235°)0.9 kt
9:36 AMslack–
12:27 PMmax flood ENE (074°)2.3 kt
3:46 PMslack–
7:06 PMmax ebb SW (235°)1.4 kt
10:23 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.