RaceAtlas

Alcatraz Island Tides: Saturday, April 18, 2026

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

6.3 ft12:21 AM-1.1 ft6:59 AM4.8 ft1:56 PM2.1 ft6:45 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 6.3 ft at 12:21 AM, low -1.1 ft at 6:59 AM. Gate: flood 3.3 kt at 10:53 PM, ebb 2.0 kt at 4:09 AM.
Modelled current at the Golden Gate on a 3.3 kt floodThe Gate at max flood, 3.3 kt
Tide height
TimeHeight
12:21 AMHigh6.3 ft
6:59 AMLow-1.1 ft
1:56 PMHigh4.8 ft
6:45 PMLow2.1 ft
Current · Golden Gate
TimeStateSpeed
1:18 AMslack–
4:09 AMmax ebb SW (235°)2.0 kt
8:11 AMslack–
11:15 AMmax flood ENE (074°)3.2 kt
3:02 PMslack–
5:20 PMmax ebb SW (235°)1.2 kt
7:49 PMslack–
10:53 PMmax flood ENE (074°)3.3 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.