# Boston king tides and high water in 2023

> In 2023, NOAA's Boston tide gauge recorded water high enough for FloodRoute's model to put at least one Boston road at risk on 44 days. The highest was 13.43 ft on Monday, January 23, 2023, 1.71 ft above the tide tables, with 46 roads at risk, including Chelsea Street, William T. Morrissey Boulevard and Marginal Street.

**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 (44)

| Date | High water (Boston gauge, ft MLLW) | vs tide tables | Roads at risk | Severity | Deepest streets (model) |
|---|---|---|---|---|---|
| Jan 20, 2023 | 12.75 | +1.71 ft | 14 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jan 21, 2023 | 12.51 | +1.05 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jan 22, 2023 | 12.25 | +0.55 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jan 23, 2023 | 13.43 | +1.71 ft | 46 | Severe | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jan 26, 2023 | 12.29 | +1.96 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Feb 20, 2023 | 12.42 | +0.88 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Feb 21, 2023 | 12.54 | +0.99 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Feb 22, 2023 | 12.03 | +0.72 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 14, 2023 | 11.96 | +2.19 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 24, 2023 | 11.89 | +0.83 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 3, 2023 | 11.90 | +0.87 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 5, 2023 | 12.43 | +1.16 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 6, 2023 | 12.54 | +1.16 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 7, 2023 | 12.35 | +1.00 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 8, 2023 | 12.18 | +1.02 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 2, 2023 | 11.94 | +0.68 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 4, 2023 | 12.31 | +0.76 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 5, 2023 | 12.44 | +0.76 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 6, 2023 | 12.35 | +0.71 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 7, 2023 | 12.08 | +0.67 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 31, 2023 | 12.08 | +0.72 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 1, 2023 | 12.24 | +0.56 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 3, 2023 | 12.29 | +0.47 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 4, 2023 | 12.23 | +0.48 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 5, 2023 | 11.91 | +0.46 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 29, 2023 | 12.15 | +0.83 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 30, 2023 | 12.47 | +0.83 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 1, 2023 | 12.36 | +0.63 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 2, 2023 | 11.94 | +0.34 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 28, 2023 | 11.98 | +0.66 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 29, 2023 | 11.78 | +0.61 ft | 2 | Possible | Chelsea Street |
| Sep 30, 2023 | 12.17 | +0.70 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 1, 2023 | 12.12 | +0.60 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 2, 2023 | 11.95 | +0.61 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 28, 2023 | 12.05 | +0.68 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 29, 2023 | 12.00 | +0.48 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 30, 2023 | 12.27 | +0.84 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 31, 2023 | 11.83 | +0.69 ft | 2 | Possible | Chelsea Street |
| Nov 1, 2023 | 11.88 | +1.17 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Nov 27, 2023 | 12.13 | +0.96 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Nov 28, 2023 | 11.81 | +0.79 ft | 2 | Possible | Chelsea Street |
| Dec 18, 2023 | 12.59 | +2.30 ft | 12 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Dec 28, 2023 | 11.93 | +1.57 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Dec 29, 2023 | 11.94 | +1.79 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |

[All Boston history](https://floodroute.com/ma/boston/history.md) · [Live forecast](https://floodroute.com/ma/boston.md)

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