RaceAtlas

Alcatraz Island Tides: Thursday, April 30, 2026

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

-0.2 ft5:50 AM4.4 ft12:28 PM1.9 ft5:26 PM5.8 ft11:43 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 5.8 ft at 11:43 PM, low -0.2 ft at 5:50 AM. Gate: flood 3.0 kt at 10:09 AM, ebb 1.8 kt at 4:17 AM.
Modelled current at the Golden Gate on a 3.0 kt floodThe Gate at max flood, 3.0 kt
Tide height
TimeHeight
5:50 AMLow-0.2 ft
12:28 PMHigh4.4 ft
5:26 PMLow1.9 ft
11:43 PMHigh5.8 ft
Current · Golden Gate
TimeStateSpeed
12:25 AMslack–
4:17 AMmax ebb SW (235°)1.8 kt
6:57 AMslack–
10:09 AMmax flood ENE (074°)3.0 kt
1:36 PMslack–
4:06 PMmax ebb SW (235°)1.2 kt
6:26 PMslack–
9:36 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.