# Greenbrae, CA king tide and flood history since 1996

> Since 1996, NOAA's San Francisco tide gauge has recorded water high enough for FloodRoute's model to put at least one Greenbrae road at risk on 948 days, about 31 a year. The highest water was 8.38 ft on Friday, February 6, 1998, 2.21 ft above the tide tables; at that level the model estimates 47 Greenbrae roads were at risk, including Irwin Street, Fifer Avenue and Lucky Drive. Those days have become more common: about 24 a year in 1996–2005, versus 41 a year in 2016–2025.

**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.

- Gauge: NOAA 9414290 (San Francisco), verified data Jan 1, 1996 – Sep 30, 2026
- Tide tables: NOAA 9414806 (Sausalito)
- Live forecast: [Greenbrae flood forecast](https://floodroute.com/ca/greenbrae.md)

## The biggest days

| Date | High water (San Francisco gauge, ft MLLW) | vs tide tables | Roads at risk | Severity | Deepest streets (model) |
|---|---|---|---|---|---|
| Feb 6, 1998 | 8.38 | +2.21 ft | 47 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Jan 3, 2026 | 8.38 | +1.25 ft | 47 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Jan 8, 2005 | 8.14 | +1.22 ft | 41 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Dec 24, 2003 | 8.12 | +1.01 ft | 41 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Dec 14, 2024 | 8.12 | +1.05 ft | 41 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Dec 31, 2005 | 8.09 | +1.13 ft | 41 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Jan 2, 2026 | 8.09 | +0.92 ft | 41 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Jan 10, 2001 | 8.07 | +0.96 ft | 40 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Jan 7, 2005 | 8.02 | +1.40 ft | 40 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Jan 1, 2006 | 8.00 | +1.10 ft | 40 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Feb 3, 1998 | 7.98 | +2.02 ft | 40 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |
| Jan 4, 2026 | 7.94 | +1.02 ft | 39 | Severe | Irwin Street, Fifer Avenue, Lucky Drive |

## Most recent days

| Date | High water (San Francisco gauge, ft MLLW) | vs tide tables | Roads at risk | Severity | Deepest streets (model) |
|---|---|---|---|---|---|
| Sep 30, 2026 | 7.19 | +0.86 ft | 19 | Severe | Fifer Avenue, Lucky Drive, Redwood Highway |
| Sep 29, 2026 | 7.11 | +0.80 ft | 11 | Severe | Fifer Avenue, Lucky Drive, Doherty Drive |
| Sep 28, 2026 | 6.77 | +0.59 ft | 7 | Severe | Fifer Avenue, Lucky Drive, Doherty Drive |
| Sep 9, 2026 | 6.99 | +0.71 ft | 10 | Severe | Fifer Avenue, Lucky Drive, Doherty Drive |
| Sep 8, 2026 | 7.05 | +0.66 ft | 10 | Severe | Fifer Avenue, Lucky Drive, Doherty Drive |
| Sep 7, 2026 | 6.98 | +0.62 ft | 10 | Severe | Fifer Avenue, Lucky Drive, Doherty Drive |
| Aug 14, 2026 | 6.90 | +0.53 ft | 7 | Severe | Fifer Avenue, Lucky Drive, Doherty Drive |
| Aug 12, 2026 | 7.37 | +0.63 ft | 22 | Severe | Fifer Avenue, Lucky Drive, Redwood Highway |
| Aug 11, 2026 | 7.47 | +0.52 ft | 22 | Severe | Fifer Avenue, Lucky Drive, Redwood Highway |
| Aug 10, 2026 | 7.46 | +0.50 ft | 22 | Severe | Fifer Avenue, Lucky Drive, Redwood Highway |

## Days with roads at risk, by year

| Year | Days | Highest water at the gauge (ft) | Most roads at risk | Record |
|---|---|---|---|---|
| [1996](https://floodroute.com/ca/greenbrae/history/1996.md) | 17 | 7.53 | 25 | full |
| [1997](https://floodroute.com/ca/greenbrae/history/1997.md) | 37 | 7.70 | 28 | full |
| [1998](https://floodroute.com/ca/greenbrae/history/1998.md) | 37 | 8.38 | 47 | full |
| [1999](https://floodroute.com/ca/greenbrae/history/1999.md) | 7 | 7.19 | 19 | full |
| [2000](https://floodroute.com/ca/greenbrae/history/2000.md) | 16 | 7.24 | 19 | full |
| [2001](https://floodroute.com/ca/greenbrae/history/2001.md) | 21 | 8.07 | 40 | full |
| [2002](https://floodroute.com/ca/greenbrae/history/2002.md) | 26 | 7.46 | 25 | full |
| [2003](https://floodroute.com/ca/greenbrae/history/2003.md) | 20 | 8.12 | 41 | full |
| [2004](https://floodroute.com/ca/greenbrae/history/2004.md) | 31 | 7.41 | 22 | full |
| [2005](https://floodroute.com/ca/greenbrae/history/2005.md) | 27 | 8.14 | 41 | full |
| [2006](https://floodroute.com/ca/greenbrae/history/2006.md) | 35 | 8.00 | 40 | full |
| [2007](https://floodroute.com/ca/greenbrae/history/2007.md) | 14 | 7.10 | 11 | full |
| [2008](https://floodroute.com/ca/greenbrae/history/2008.md) | 24 | 7.40 | 22 | full |
| [2009](https://floodroute.com/ca/greenbrae/history/2009.md) | 30 | 7.42 | 22 | full |
| [2010](https://floodroute.com/ca/greenbrae/history/2010.md) | 30 | 7.62 | 25 | full |
| [2011](https://floodroute.com/ca/greenbrae/history/2011.md) | 30 | 7.67 | 28 | full |
| [2012](https://floodroute.com/ca/greenbrae/history/2012.md) | 25 | 7.63 | 25 | full |
| [2013](https://floodroute.com/ca/greenbrae/history/2013.md) | 15 | 7.28 | 21 | full |
| [2014](https://floodroute.com/ca/greenbrae/history/2014.md) | 35 | 7.77 | 34 | full |
| [2015](https://floodroute.com/ca/greenbrae/history/2015.md) | 46 | 7.58 | 25 | full |
| [2016](https://floodroute.com/ca/greenbrae/history/2016.md) | 38 | 7.56 | 25 | full |
| [2017](https://floodroute.com/ca/greenbrae/history/2017.md) | 38 | 7.64 | 25 | full |
| [2018](https://floodroute.com/ca/greenbrae/history/2018.md) | 37 | 7.49 | 25 | full |
| [2019](https://floodroute.com/ca/greenbrae/history/2019.md) | 46 | 7.54 | 25 | full |
| [2020](https://floodroute.com/ca/greenbrae/history/2020.md) | 25 | 7.27 | 21 | full |
| [2021](https://floodroute.com/ca/greenbrae/history/2021.md) | 36 | 7.45 | 22 | full |
| [2022](https://floodroute.com/ca/greenbrae/history/2022.md) | 38 | 7.54 | 25 | full |
| [2023](https://floodroute.com/ca/greenbrae/history/2023.md) | 71 | 7.66 | 28 | full |
| [2024](https://floodroute.com/ca/greenbrae/history/2024.md) | 15 | 8.12 | 41 | partial |
| [2025](https://floodroute.com/ca/greenbrae/history/2025.md) | 39 | 7.60 | 25 | full |
| [2026](https://floodroute.com/ca/greenbrae/history/2026.md) | 42 | 8.38 | 47 | partial |

## Method

For every day since 1996 we take NOAA's verified highest observed water at the tide gauge, adjust it to the town's prediction station exactly as the live forecast does (the gauge's departure from the tide tables, minus the departure already built into our calibration), and run FloodRoute's flood model on today's road network and street elevations. A day counts when at least one road in the town is at or below that water level by the model's rules. Rain is not included, so wet days were likely worse.

Data: [CSV](https://floodroute.com/data/history/ca/greenbrae.csv) · [JSON](https://floodroute.com/data/history/ca/greenbrae.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)

## Frequently asked questions

### How often do roads flood at high tide in Greenbrae?

By FloodRoute's estimate, at least one Greenbrae road was at risk on 948 days between 1996 and Sep 30, 2026, about 31 a year. Those days have become more common: about 24 a year in 1996–2005, versus 41 a year in 2016–2025. Most of those days are shallow water on a few low streets; the [biggest days](https://floodroute.com/ca/greenbrae/history) put dozens of roads at risk.

### What was the highest tide in Greenbrae since 1996?

Friday, February 6, 1998: NOAA's San Francisco tide gauge recorded 8.38 ft (MLLW), 2.21 ft above the tide tables. At that level FloodRoute's model estimates 47 Greenbrae roads were at risk, including Irwin Street, Fifer Avenue and Lucky Drive.

### When did a high tide last put Greenbrae roads at risk?

The most recent day in the verified record is Wednesday, September 30, 2026: 7.19 ft at the San Francisco gauge, 19 roads at risk. NOAA verifies data with a lag of a month or two; the [live forecast](https://floodroute.com/ca/greenbrae) covers today and the weeks ahead.

### Is this a record of actual flooding in Greenbrae?

No. 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. Neighbor flood reports in the FloodRoute app are the ground truth we use to check and improve the model.

### Can I use this data?

Yes. Download it as [CSV](https://floodroute.com/data/history/ca/greenbrae.csv) or [JSON](https://floodroute.com/data/history/ca/greenbrae.json) under the Open Database License (ODbL) 1.0, with attribution to FloodRoute (floodroute.com), © OpenStreetMap contributors, NOAA CO-OPS. Please describe it as estimates, never as observed flooding. More on the [open data page](https://floodroute.com/data).

**Forecasts are estimates, not guarantees.** Never drive or walk through flood water: according to the National Weather Service, a foot of moving water can carry away most cars. Turn around, don’t drown. Always follow local authorities and official warnings.

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

FloodRoute provides estimates only. Never drive or walk through flood water. © Axiomic, LLC · contact@axiomic.ai