# Boston king tides and high water in 2018

> In 2018, NOAA's Boston tide gauge recorded water high enough for FloodRoute's model to put at least one Boston road at risk on 60 days. The highest was 15.16 ft on Thursday, January 4, 2018, 3.33 ft above the tide tables, with 129 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 (60)

| Date | High water (Boston gauge, ft MLLW) | vs tide tables | Roads at risk | Severity | Deepest streets (model) |
|---|---|---|---|---|---|
| Jan 1, 2018 | 11.93 | +0.18 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jan 2, 2018 | 11.99 | −0.01 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jan 3, 2018 | 12.14 | +0.11 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jan 4, 2018 | 15.16 | +3.33 ft | 129 | Severe | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jan 30, 2018 | 13.24 | +1.78 ft | 32 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Feb 1, 2018 | 12.52 | +0.75 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Feb 2, 2018 | 12.11 | +0.51 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 1, 2018 | 12.43 | +1.11 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 2, 2018 | 14.63 | +3.25 ft | 115 | Severe | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 3, 2018 | 13.91 | +2.68 ft | 81 | Severe | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 4, 2018 | 13.03 | +2.30 ft | 27 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 5, 2018 | 12.86 | +2.28 ft | 22 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 6, 2018 | 12.45 | +2.15 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 7, 2018 | 11.79 | +1.88 ft | 2 | Possible | Chelsea Street |
| Mar 8, 2018 | 12.44 | +2.95 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 13, 2018 | 11.85 | +2.76 ft | 2 | Possible | Chelsea Street |
| Mar 22, 2018 | 12.67 | +2.16 ft | 14 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Mar 30, 2018 | 12.07 | +1.22 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Apr 16, 2018 | 11.87 | +1.53 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Apr 17, 2018 | 12.05 | +1.18 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Apr 18, 2018 | 12.04 | +0.95 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Apr 19, 2018 | 12.09 | +0.91 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Apr 20, 2018 | 11.77 | +0.67 ft | 2 | Possible | Chelsea Street |
| May 17, 2018 | 12.19 | +0.50 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| May 18, 2018 | 12.14 | +0.42 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 13, 2018 | 12.36 | +0.50 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 15, 2018 | 12.90 | +0.87 ft | 22 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 16, 2018 | 12.47 | +0.45 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 17, 2018 | 12.24 | +0.44 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jun 18, 2018 | 11.84 | +0.41 ft | 2 | Possible | Chelsea Street |
| Jul 11, 2018 | 11.99 | +0.37 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 12, 2018 | 12.32 | +0.35 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 14, 2018 | 12.44 | +0.32 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 15, 2018 | 12.37 | +0.28 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 16, 2018 | 12.33 | +0.47 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Jul 17, 2018 | 11.90 | +0.46 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 9, 2018 | 12.17 | +0.64 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 10, 2018 | 12.41 | +0.56 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 12, 2018 | 12.56 | +0.55 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 13, 2018 | 12.38 | +0.44 ft | 8 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 14, 2018 | 12.21 | +0.52 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Aug 15, 2018 | 11.78 | +0.54 ft | 2 | Possible | Chelsea Street |
| Sep 7, 2018 | 11.87 | +0.60 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 8, 2018 | 12.11 | +0.55 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 9, 2018 | 12.52 | +0.85 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 10, 2018 | 11.94 | +0.83 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Sep 11, 2018 | 12.31 | +0.72 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 7, 2018 | 11.80 | +0.72 ft | 2 | Possible | Chelsea Street |
| Oct 11, 2018 | 12.32 | +1.19 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 12, 2018 | 12.05 | +1.22 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 27, 2018 | 12.53 | +1.50 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Oct 28, 2018 | 11.83 | +0.82 ft | 2 | Possible | Chelsea Street |
| Nov 25, 2018 | 13.01 | +1.53 ft | 27 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Nov 26, 2018 | 12.54 | +1.14 ft | 10 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Nov 27, 2018 | 12.35 | +1.18 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Nov 28, 2018 | 12.17 | +1.37 ft | 5 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Dec 21, 2018 | 12.04 | +1.10 ft | 4 | Possible | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Dec 22, 2018 | 12.60 | +1.22 ft | 12 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Dec 24, 2018 | 12.36 | +0.58 ft | 6 | Likely | Chelsea Street, William T. Morrissey Boulevard, Marginal Street |
| Dec 25, 2018 | 12.04 | +0.36 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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