RaceAtlas

Alcatraz Island Tides: Thursday, December 17, 2026

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

5.3 ft5:45 AM2.0 ft12:15 PM3.7 ft5:43 PM1.5 ft11:22 PM2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 5.3 ft at 5:45 AM, low 1.5 ft at 11:22 PM. Gate: flood 2.7 kt at 2:40 AM, ebb 1.1 kt at 9:58 AM.
Modelled current at the Golden Gate on a 2.7 kt floodThe Gate at max flood, 2.7 kt
Tide height
TimeHeight
5:45 AMHigh5.3 ft
12:15 PMLow2.0 ft
5:43 PMHigh3.7 ft
11:22 PMLow1.5 ft
Current · Golden Gate
TimeStateSpeed
2:40 AMmax flood ENE (074°)2.7 kt
7:07 AMslack–
9:58 AMmax ebb SW (235°)1.1 kt
12:56 PMslack–
3:49 PMmax flood ENE (074°)1.5 kt
7:41 PMslack–
9:47 PMmax ebb SW (235°)0.7 kt
11:48 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.