RaceAtlas

Alcatraz Island Tides: Tuesday, December 30, 2025

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

2.5 ft12:42 AM6.5 ft7:17 AM-0.4 ft2:30 PM4.2 ft9:36 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 6.5 ft at 7:17 AM, low -0.4 ft at 2:30 PM. Gate: flood 2.9 kt at 4:57 AM, ebb 1.6 kt at 11:30 AM.
Modelled current at the Golden Gate on a 2.9 kt floodThe Gate at max flood, 2.9 kt
Tide height
TimeHeight
12:42 AMLow2.5 ft
7:17 AMHigh6.5 ft
2:30 PMLow-0.4 ft
9:36 PMHigh4.2 ft
Current · Golden Gate
TimeStateSpeed
1:31 AMslack–
4:57 AMmax flood ENE (074°)2.9 kt
8:29 AMslack–
11:30 AMmax ebb SW (235°)1.6 kt
3:32 PMslack–
6:49 PMmax flood ENE (074°)2.5 kt
10:29 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.