RaceAtlas

Half Moon Bay Tides: Thursday, August 21, 2025

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

-0.8 ft4:20 AM4.6 ft10:59 AM2.5 ft3:56 PM6.4 ft9:53 PM0 ft2 ft4 ft6 ft12 AM6 AM12 PM6 PM12 AM
High 6.4 ft at 9:53 PM, low -0.8 ft at 4:20 AM. Gate: flood 3.2 kt at 9:31 AM, ebb 1.9 kt at 3:59 AM.
Modelled current at the Golden Gate on a 3.2 kt floodThe Gate at max flood, 3.2 kt
Tide height
TimeHeight
4:20 AMLow-0.8 ft
10:59 AMHigh4.6 ft
3:56 PMLow2.5 ft
9:53 PMHigh6.4 ft
Current · Golden Gate
TimeStateSpeed
3:59 AMmax ebb SW (235°)1.9 kt
6:17 AMslack–
9:31 AMmax flood ENE (074°)3.2 kt
1:11 PMslack–
3:57 PMmax ebb SW (235°)1.2 kt
5:56 PMslack–
9:04 PMmax flood ENE (074°)2.7 kt

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.