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Flood in Suffolk County, Massachusetts
113 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
Suffolk County, Massachusetts, has 113 flood events in the NCEI record since 1950, with at least one in 25 different years.
July is the busiest month, with 28 of the recorded events. The last 20 years account for 101 events against 12 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 6% of the 1,890 flood events recorded in Massachusetts; its 194.0 per 100 square miles compares with 24.2 statewide.
Compared with Massachusetts
| Measure | Suffolk County | Massachusetts | US |
|---|---|---|---|
| Flood events since 1950 | 113 | 1,890 | 183,559 |
| Per 100 square miles | 194.0 | 24.2 | 5.2 |
| Per 10,000 residents | 1.5 | 2.7 | 5.5 |
| Deaths recorded | 0 | 3 | 2,961 |
| Busiest month | July | July | June |
By year
Seasonality
13Feb
4Mar
6Apr
7May
2Jun
12Jul
28Aug
9Sep
12Oct
14Nov
3Dec
3
Recorded events
All 113 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 26 Jun 2024 | Flash Flood | — | — | — | — | — | County |
| 26 Jun 2024 | Flash Flood | — | — | — | — | — | County |
| 4 Apr 2024 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 10 Mar 2024 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 13 Jan 2024 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 10 Jan 2024 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 18 Aug 2023 | Flash Flood | — | — | — | — | — | County |
| 29 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 29 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 29 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 29 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 25 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 21 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 21 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 21 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 21 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 21 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 21 Jul 2023 | Flash Flood | — | — | — | — | — | County |
| 16 Jul 2023 | Flood | — | — | — | — | — | County |
| 23 Jan 2023 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 23 Jan 2023 | Flood | — | — | — | — | — | County |
| 23 Dec 2022 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 17 Jan 2022 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 2 Sep 2021 | Flash Flood | — | $5K | — | — | — | County |
| 23 Jul 2021 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 9 Jul 2021 | Flood | — | — | — | — | — | County |
| 9 Jul 2021 | Flood | — | — | — | — | — | County |
| 9 Jul 2021 | Flood | — | — | — | — | — | County |
| 2 Feb 2021 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 17 Dec 2020 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 22 Sep 2020 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 28 Jun 2020 | Flood | — | — | — | — | — | County |
| 28 Jun 2020 | Flood | — | — | — | — | — | County |
| 9 Apr 2020 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 3 Apr 2020 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 28 Oct 2019 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 7 Aug 2019 | Flood | — | — | — | — | — | County |
| 31 Jul 2019 | Flood | — | $2K | — | — | — | County |
| 31 Jul 2019 | Flood | — | $2K | — | — | — | County |
| 6 Jul 2019 | Flood | — | — | — | — | — | County |
| 29 Jun 2019 | Flood | — | $20K | — | — | — | County |
| 20 Jan 2019 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 25 Nov 2018 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 3 Nov 2018 | Flood | — | — | — | — | — | County |
| 27 Oct 2018 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 25 Sep 2018 | Flood | — | $3K | — | — | — | County |
| 18 Sep 2018 | Flash Flood | — | — | — | — | — | County |
| 12 Aug 2018 | Flood | — | $10K | — | — | — | County |
| 17 Jul 2018 | Flash Flood | — | — | — | — | — | County |
| 17 Jul 2018 | Flash Flood | — | $20K | — | — | — | County |
| 25 Jun 2018 | Flood | — | — | — | — | — | County |
| 25 Jun 2018 | Flood | — | — | — | — | — | County |
| 25 Jun 2018 | Flood | — | — | — | — | — | County |
| 15 May 2018 | Flood | — | $15K | — | — | — | County |
| 2 Mar 2018 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 30 Jan 2018 | Coastal Flood | — | $20K | — | — | — | Forecast zone |
| 4 Jan 2018 | Coastal Flood | — | $500K | — | — | — | Forecast zone |
| 30 Oct 2017 | Flood | — | $15K | — | — | — | County |
| 30 Sep 2017 | Flood | — | $40K | — | — | — | County |
| 30 Sep 2017 | Flood | — | — | — | — | — | County |
| 30 Sep 2017 | Flood | — | $25K | — | — | — | County |
| 30 Sep 2017 | Flood | — | $25K | — | — | — | County |
| 14 Sep 2017 | Flood | — | $25K | — | — | — | County |
| 2 Aug 2017 | Flash Flood | — | $20K | — | — | — | County |
| 2 Aug 2017 | Flash Flood | — | $10K | — | — | — | County |
| 2 Aug 2017 | Flood | — | — | — | — | — | County |
| 2 Aug 2017 | Flood | — | — | — | — | — | County |
| 18 Jul 2017 | Flood | — | — | — | — | — | County |
| 12 Jul 2017 | Flood | — | — | — | — | — | County |
| 21 Oct 2016 | Flash Flood | — | $5K | — | — | — | County |
| 23 Jul 2016 | Flood | — | — | — | — | — | County |
| 8 Feb 2016 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 24 Jan 2016 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 28 Oct 2015 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 27 Jan 2015 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 23 Oct 2014 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 23 Oct 2014 | Flood | — | $30K | — | — | — | County |
| 13 Aug 2014 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 3 Jan 2014 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 2 Jan 2014 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 1 Sep 2013 | Flood | — | $5K | — | — | — | County |
| 23 Jul 2013 | Flash Flood | — | — | — | — | — | County |
| 7 Jun 2013 | Flood | — | — | — | — | — | County |
| 7 Mar 2013 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 9 Feb 2013 | Coastal Flood | — | $30K | — | — | — | Forecast zone |
| 29 Oct 2012 | Flood | — | $15K | — | — | — | County |
| 29 Oct 2012 | Coastal Flood | — | $3.0M | — | — | — | Forecast zone |
| 4 Jun 2012 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 3 Jun 2012 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 23 Nov 2011 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 27 Dec 2010 | Coastal Flood | — | $50K | — | — | — | Forecast zone |
| 25 Aug 2010 | Flood | — | — | — | — | — | County |
| 10 Jul 2010 | Flash Flood | — | $500K | — | — | — | County |
| 14 Mar 2010 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 14 Mar 2010 | Flood | — | $11M | — | — | — | County |
| 2 Jan 2010 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 18 Oct 2009 | Coastal Flood | — | — | — | — | — | Forecast zone |
| 13 Feb 2008 | Flood | — | $5K | — | — | — | County |
| 17 Apr 2007 | Coastal Flood | — | $10K | — | — | — | Forecast zone |
| 16 Apr 2007 | Coastal Flood | — | $5K | — | — | — | Forecast zone |
| 15 Apr 2007 | Coastal Flood | — | $5K | — | — | — | Forecast zone |
| 28 Oct 2006 | Flood | — | $8K | — | — | — | County |
| 13 May 2006 | Flood | — | — | — | — | — | County |
| 6 Jul 2005 | Flash Flood | — | $20K | — | — | — | County |
| 6 Jul 2005 | Flash Flood | — | $30K | — | — | — | County |
| 5 Mar 2001 | Flood | — | $15M | — | — | — | Forecast zone |
| 22 Apr 2000 | Flash Flood | — | — | — | — | — | County |
| 10 Sep 1999 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 1998 | Flash Flood | — | $570K | — | — | — | County |
| 21 Oct 1996 | Flash Flood | — | $10M | — | — | — | County |
| 20 Oct 1996 | Flash Flood | — | — | — | — | — | County |
| 20 Oct 1996 | Flash Flood | — | — | — | — | — | County |
| 18 Sep 1996 | Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Suffolk County had?
113 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Suffolk County?
26 Jun 2024 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Suffolk County?
The flood of 5 Mar 2001, with property damage estimated by NCEI at $15M.
How does Suffolk County compare with Massachusetts for flood?
194.0 events per 100 square miles against 24.2 statewide; the county holds 113 of the state's 1,890 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.