NOAA station analysis · local station time
San Francisco Tide Turns: How the Next 30 Days Are Structured
How many listed NOAA high and low tide turns does San Francisco have over the next 30 days?
The answer
From September 29, 2026 through October 28, 2026, San Francisco, California's largest listed NOAA turn-to-turn range is 7.773 ft (2.369 m converted) on October 28, 2026. The smallest listed range is 1.216 ft (0.371 m converted) on October 18, 2026.
Across the 30 local dates, NOAA returned 4 dates with 3 listed turns (13%), 26 dates with 4 listed turns (87%). The page preserves those returned counts; it does not add a tide event where the official response supplied none.
How this calculation works
For each local date, this page subtracts the lowest listed NOAA high/low prediction from the highest listed prediction. NOAA supplies feet relative to Mean Lower Low Water (MLLW); metres are conversions from those official feet values.
A listed prediction range is not observed water depth, launch clearance, or a safety guarantee. Wind, pressure, storms, and local conditions can make observed water different.
30-day NOAA station sequence
| Local date | Listed turns | Lowest turn | Highest turn | Computed range |
|---|---|---|---|---|
| 2026-09-29 | 4 | 20:06 · -0.223 ft | 13:30 · 6.307 ft | 6.530 ft (1.990 m) |
| 2026-09-30 | 4 | 21:00 · -0.262 ft | 14:10 · 6.326 ft | 6.588 ft (2.008 m) |
| 2026-10-01 | 4 | 22:04 · -0.188 ft | 14:58 · 6.219 ft | 6.407 ft (1.953 m) |
| 2026-10-02 | 4 | 23:17 · -0.097 ft | 15:58 · 6.014 ft | 6.111 ft (1.863 m) |
| 2026-10-03 | 3 | 11:12 · 3.543 ft | 17:11 · 5.791 ft | 2.248 ft (0.685 m) |
| 2026-10-04 | 4 | 00:34 · -0.071 ft | 18:32 · 5.646 ft | 5.717 ft (1.743 m) |
| 2026-10-05 | 4 | 01:42 · -0.090 ft | 19:49 · 5.599 ft | 5.689 ft (1.734 m) |
| 2026-10-06 | 4 | 02:38 · -0.064 ft | 20:58 · 5.584 ft | 5.648 ft (1.722 m) |
| 2026-10-07 | 4 | 03:25 · 0.075 ft | 10:19 · 5.535 ft | 5.460 ft (1.664 m) |
| 2026-10-08 | 4 | 04:06 · 0.347 ft | 10:51 · 5.778 ft | 5.431 ft (1.655 m) |
| 2026-10-09 | 4 | 17:23 · 0.448 ft | 11:22 · 5.959 ft | 5.511 ft (1.680 m) |
| 2026-10-10 | 3 | 18:03 · 0.124 ft | 11:50 · 6.063 ft | 5.939 ft (1.810 m) |
| 2026-10-11 | 4 | 18:43 · -0.062 ft | 12:18 · 6.084 ft | 6.146 ft (1.873 m) |
| 2026-10-12 | 4 | 19:21 · -0.114 ft | 12:46 · 6.028 ft | 6.142 ft (1.872 m) |
| 2026-10-13 | 4 | 20:01 · -0.048 ft | 13:14 · 5.902 ft | 5.950 ft (1.814 m) |
| 2026-10-14 | 4 | 20:45 · 0.111 ft | 13:46 · 5.717 ft | 5.606 ft (1.709 m) |
| 2026-10-15 | 4 | 21:34 · 0.319 ft | 14:24 · 5.480 ft | 5.161 ft (1.573 m) |
| 2026-10-16 | 4 | 22:32 · 0.514 ft | 15:11 · 5.212 ft | 4.698 ft (1.432 m) |
| 2026-10-17 | 4 | 23:38 · 0.631 ft | 16:10 · 4.949 ft | 4.318 ft (1.316 m) |
| 2026-10-18 | 3 | 12:25 · 3.537 ft | 17:21 · 4.753 ft | 1.216 ft (0.371 m) |
| 2026-10-19 | 4 | 00:42 · 0.653 ft | 18:35 · 4.666 ft | 4.013 ft (1.223 m) |
| 2026-10-20 | 4 | 01:35 · 0.632 ft | 08:57 · 4.710 ft | 4.078 ft (1.243 m) |
| 2026-10-21 | 4 | 02:20 · 0.644 ft | 09:23 · 4.958 ft | 4.314 ft (1.315 m) |
| 2026-10-22 | 4 | 02:58 · 0.742 ft | 09:47 · 5.251 ft | 4.509 ft (1.374 m) |
| 2026-10-23 | 4 | 16:18 · 0.864 ft | 10:12 · 5.577 ft | 4.713 ft (1.437 m) |
| 2026-10-24 | 4 | 16:55 · 0.228 ft | 10:39 · 5.913 ft | 5.685 ft (1.733 m) |
| 2026-10-25 | 3 | 17:34 · -0.342 ft | 11:07 · 6.228 ft | 6.570 ft (2.003 m) |
| 2026-10-26 | 4 | 18:17 · -0.783 ft | 11:39 · 6.487 ft | 7.270 ft (2.216 m) |
| 2026-10-27 | 4 | 19:02 · -1.044 ft | 12:15 · 6.646 ft | 7.690 ft (2.344 m) |
| 2026-10-28 | 4 | 19:52 · -1.103 ft | 12:56 · 6.670 ft | 7.773 ft (2.369 m) |
Source and reproducibility
Source: NOAA CO-OPS Tide Predictions API, station 9414290, request 2026-09-29 through 2026-10-28, MLLW, station local time, English units.