RaceAtlas

Half Moon Bay Tides: Tuesday, April 21, 2026

Tide heights at Half Moon Bay with the flood, ebb and slack schedule at the Golden Gate.

6.1 ft1:13 AM-1.1 ft8:47 AM3.8 ft3:53 PM2.9 ft7:59 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 6.1 ft at 1:13 AM, low -1.1 ft at 8:47 AM. Gate: flood 3.0 kt at 12:31 AM, ebb 1.7 kt at 6:21 AM.
Modelled current at the Golden Gate on a 3.0 kt floodThe Gate at max flood, 3.0 kt
Tide height
TimeHeight
1:13 AMHigh6.1 ft
8:47 AMLow-1.1 ft
3:53 PMHigh3.8 ft
7:59 PMLow2.9 ft
Current · Golden Gate
TimeStateSpeed
12:31 AMmax flood ENE (074°)3.0 kt
3:32 AMslack–
6:21 AMmax ebb SW (235°)1.7 kt
10:47 AMslack–
1:58 PMmax flood ENE (074°)2.7 kt
6:14 PMslack–
8:13 PMmax ebb SW (235°)0.7 kt
10:14 PMslack–

Not for navigation. These are harmonic predictions, not live measurements. Tide heights: station 9414131 (Half Moon Bay). Currents: station SFB1203 (San Francisco Bay Entrance, Golden Gate). · RaceAtlas, the SF Bay current atlas.