# Mill Valley king tides and high water in 2021

> In 2021, NOAA's San Francisco tide gauge recorded water high enough for FloodRoute's model to put at least one Mill Valley road at risk on 55 days. The highest was 7.45 ft on Saturday, December 4, 2021, 0.32 ft above the tide tables, with 10 roads at risk, including Ryan Avenue, Plymouth Avenue and Park Terrace.

**Estimates, not records of actual flooding.** Each day is NOAA's verified high water at the tide gauge, run through FloodRoute's flood model on today's roads and elevations, in dry weather. Drains, levees, tide gates, rain, road changes and elevation error all mean real conditions differed. Not for property, real-estate, insurance, lending, engineering or legal decisions.

## Every day with roads at risk (55)

| Date | High water (San Francisco gauge, ft MLLW) | vs tide tables | Roads at risk | Severity | Deepest streets (model) |
|---|---|---|---|---|---|
| Jan 10, 2021 | 6.74 | −0.10 ft | 1 | Possible | Sycamore Avenue |
| Jan 11, 2021 | 6.83 | −0.12 ft | 1 | Possible | Sycamore Avenue |
| Jan 12, 2021 | 6.99 | +0.05 ft | 1 | Possible | Sycamore Avenue |
| Jan 13, 2021 | 6.68 | −0.11 ft | 1 | Possible | Sycamore Avenue |
| Jan 27, 2021 | 6.90 | +0.56 ft | 1 | Possible | Sycamore Avenue |
| Jan 28, 2021 | 7.08 | +0.66 ft | 1 | Possible | Sycamore Avenue |
| Jan 29, 2021 | 6.86 | +0.47 ft | 1 | Possible | Sycamore Avenue |
| Feb 8, 2021 | 6.67 | +0.19 ft | 1 | Possible | Sycamore Avenue |
| Feb 9, 2021 | 6.75 | +0.21 ft | 1 | Possible | Sycamore Avenue |
| Feb 10, 2021 | 6.61 | +0.10 ft | 1 | Possible | Sycamore Avenue |
| Apr 26, 2021 | 6.67 | +0.41 ft | 1 | Possible | Sycamore Avenue |
| Apr 28, 2021 | 6.68 | +0.22 ft | 1 | Possible | Sycamore Avenue |
| Apr 29, 2021 | 6.68 | +0.18 ft | 1 | Possible | Sycamore Avenue |
| May 24, 2021 | 6.63 | +0.11 ft | 1 | Possible | Sycamore Avenue |
| May 25, 2021 | 6.94 | +0.17 ft | 1 | Possible | Sycamore Avenue |
| May 26, 2021 | 6.98 | +0.12 ft | 1 | Possible | Sycamore Avenue |
| May 28, 2021 | 6.94 | +0.17 ft | 1 | Possible | Sycamore Avenue |
| May 29, 2021 | 6.76 | +0.26 ft | 1 | Possible | Sycamore Avenue |
| Jun 20, 2021 | 6.64 | +0.35 ft | 1 | Possible | Sycamore Avenue |
| Jun 21, 2021 | 6.96 | +0.30 ft | 1 | Possible | Sycamore Avenue |
| Jun 22, 2021 | 7.28 | +0.34 ft | 9 | Likely | Ryan Avenue, Plymouth Avenue, Park Terrace |
| Jun 23, 2021 | 7.35 | +0.27 ft | 9 | Likely | Ryan Avenue, Plymouth Avenue, Park Terrace |
| Jun 24, 2021 | 7.35 | +0.29 ft | 9 | Likely | Ryan Avenue, Plymouth Avenue, Park Terrace |
| Jun 26, 2021 | 7.22 | +0.33 ft | 9 | Likely | Ryan Avenue, Plymouth Avenue, Park Terrace |
| Jun 27, 2021 | 6.83 | +0.27 ft | 1 | Possible | Sycamore Avenue |
| Jul 19, 2021 | 6.71 | +0.13 ft | 1 | Possible | Sycamore Avenue |
| Jul 20, 2021 | 6.91 | +0.07 ft | 1 | Possible | Sycamore Avenue |
| Jul 21, 2021 | 7.15 | +0.14 ft | 1 | Likely | Sycamore Avenue |
| Jul 22, 2021 | 7.12 | +0.04 ft | 1 | Likely | Sycamore Avenue |
| Jul 23, 2021 | 7.13 | +0.12 ft | 1 | Likely | Sycamore Avenue |
| Jul 25, 2021 | 6.94 | +0.15 ft | 1 | Possible | Sycamore Avenue |
| Jul 26, 2021 | 6.62 | +0.19 ft | 1 | Possible | Sycamore Avenue |
| Aug 17, 2021 | 6.80 | +0.33 ft | 1 | Possible | Sycamore Avenue |
| Aug 18, 2021 | 6.90 | +0.29 ft | 1 | Possible | Sycamore Avenue |
| Aug 19, 2021 | 7.00 | +0.28 ft | 1 | Possible | Sycamore Avenue |
| Aug 20, 2021 | 7.19 | +0.45 ft | 9 | Likely | Ryan Avenue, Plymouth Avenue, Park Terrace |
| Aug 21, 2021 | 7.15 | +0.51 ft | 1 | Likely | Sycamore Avenue |
| Aug 23, 2021 | 6.93 | +0.54 ft | 1 | Possible | Sycamore Avenue |
| Oct 8, 2021 | 6.60 | +0.25 ft | 1 | Possible | Sycamore Avenue |
| Oct 24, 2021 | 6.82 | +1.27 ft | 1 | Possible | Sycamore Avenue |
| Nov 4, 2021 | 6.69 | +0.20 ft | 1 | Possible | Sycamore Avenue |
| Nov 5, 2021 | 6.93 | +0.21 ft | 1 | Possible | Sycamore Avenue |
| Nov 6, 2021 | 6.97 | +0.16 ft | 1 | Possible | Sycamore Avenue |
| Nov 7, 2021 | 6.75 | +0.03 ft | 1 | Possible | Sycamore Avenue |
| Nov 8, 2021 | 6.72 | +0.27 ft | 1 | Possible | Sycamore Avenue |
| Dec 2, 2021 | 7.01 | +0.32 ft | 1 | Possible | Sycamore Avenue |
| Dec 3, 2021 | 7.38 | +0.41 ft | 9 | Likely | Ryan Avenue, Plymouth Avenue, Park Terrace |
| Dec 4, 2021 | 7.45 | +0.32 ft | 10 | Likely | Ryan Avenue, Plymouth Avenue, Park Terrace |
| Dec 5, 2021 | 7.22 | +0.11 ft | 9 | Likely | Ryan Avenue, Plymouth Avenue, Park Terrace |
| Dec 6, 2021 | 7.07 | +0.16 ft | 1 | Possible | Sycamore Avenue |
| Dec 7, 2021 | 6.74 | +0.23 ft | 1 | Possible | Sycamore Avenue |
| Dec 13, 2021 | 6.62 | +0.83 ft | 1 | Possible | Sycamore Avenue |
| Dec 29, 2021 | 6.89 | +0.68 ft | 1 | Possible | Sycamore Avenue |
| Dec 30, 2021 | 7.12 | +0.52 ft | 1 | Likely | Sycamore Avenue |
| Dec 31, 2021 | 7.40 | +0.46 ft | 9 | Likely | Ryan Avenue, Plymouth Avenue, Park Terrace |

[All Mill Valley history](https://floodroute.com/ca/mill-valley/history.md) · [Live forecast](https://floodroute.com/ca/mill-valley.md)

Data: [CSV](https://floodroute.com/data/history/ca/mill-valley.csv) · [JSON](https://floodroute.com/data/history/ca/mill-valley.json) · Open Database License (ODbL) 1.0 (https://opendatacommons.org/licenses/odbl/1-0/) · Credit: FloodRoute (floodroute.com), © OpenStreetMap contributors, NOAA CO-OPS · [All towns](https://floodroute.com/data.md)

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Web version: https://floodroute.com/ca/mill-valley/history/2021 · Site index for AI agents: https://floodroute.com/llms.txt · Every page is available as Markdown: add `.md` to its URL.

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