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Hydrograph River at a Glance Download
Atlantic Coast at Gloucester (IN MLLW) Tide Height (ft)Forecast: 3.6 ft 8:00PM May 16, 2022Forecast: 6.1 ft 9:00PM May 16, 2022Forecast: 8.8 ft 10:00PM May 16, 2022Forecast: 10.9 ft 11:00PM May 16, 2022Highest Forecast: 12 ft 12:00AM May 17, 2022Forecast: 11.6 ft 1:00AM May 17, 2022Forecast: 10 ft 2:00AM May 17, 2022Forecast: 7.5 ft 3:00AM May 17, 2022Forecast: 4.4 ft 4:00AM May 17, 2022Forecast: 1.5 ft 5:00AM May 17, 2022Forecast: -0.5 ft 6:00AM May 17, 2022Forecast: -0.8 ft 7:00AM May 17, 2022Forecast: 0.6 ft 8:00AM May 17, 2022Forecast: 3 ft 9:00AM May 17, 2022Forecast: 5.5 ft 10:00AM May 17, 2022Forecast: 8.1 ft 11:00AM May 17, 2022Forecast: 9.9 ft 12:00PM May 17, 2022Forecast: 10.5 ft 1:00PM May 17, 2022Forecast: 9.8 ft 2:00PM May 17, 2022Forecast: 8 ft 3:00PM May 17, 2022Forecast: 5.6 ft 4:00PM May 17, 2022Forecast: 3.2 ft 5:00PM May 17, 2022Forecast: 1.2 ft 6:00PM May 17, 2022Forecast: 0.6 ft 7:00PM May 17, 2022Forecast: 1.7 ft 8:00PM May 17, 2022Forecast: 3.9 ft 9:00PM May 17, 2022Forecast: 6.5 ft 10:00PM May 17, 2022Forecast: 9 ft 11:00PM May 17, 2022Forecast: 10.9 ft 12:00AM May 18, 2022Forecast: 11.7 ft 1:00AM May 18, 2022Forecast: 11 ft 2:00AM May 18, 2022Forecast: 9.1 ft 3:00AM May 18, 2022Forecast: 6.4 ft 4:00AM May 18, 2022Forecast: 3.6 ft 5:00AM May 18, 2022Forecast: 0.9 ft 6:00AM May 18, 2022Forecast: -0.8 ft 7:00AM May 18, 2022Forecast: -1 ft 8:00AM May 18, 2022Forecast: 0.8 ft 9:00AM May 18, 2022Forecast: 3.1 ft 10:00AM May 18, 2022Forecast: 5.7 ft 11:00AM May 18, 2022Forecast: 8.2 ft 12:00PM May 18, 2022Forecast: 9.8 ft 1:00PM May 18, 2022Forecast: 10.2 ft 2:00PM May 18, 2022Forecast: 9.3 ft 3:00PM May 18, 2022Forecast: 7.4 ft 4:00PM May 18, 2022Forecast: 5.1 ft 5:00PM May 18, 2022Forecast: 2.8 ft 6:00PM May 18, 2022Forecast: 1.1 ft 7:00PM May 18, 2022Forecast: 0.7 ft 8:00PM May 18, 2022Forecast: 2 ft 9:00PM May 18, 2022Forecast: 4.3 ft 10:00PM May 18, 2022Forecast: 6.9 ft 11:00PM May 18, 2022Forecast: 9.3 ft 12:00AM May 19, 2022Forecast: 11.1 ft 1:00AM May 19, 2022Forecast: 11.7 ft 2:00AM May 19, 2022Forecast: 11 ft 3:00AM May 19, 2022Forecast: 9 ft 4:00AM May 19, 2022Forecast: 6.3 ft 5:00AM May 19, 2022Forecast: 3.5 ft 6:00AM May 19, 2022Forecast: 1 ft 7:00AM May 19, 2022Forecast: -0.6 ft 8:00AM May 19, 2022Forecast: -0.3 ft 9:00AM May 19, 2022Forecast: 1.4 ft 10:00AM May 19, 2022Forecast: 3.6 ft 11:00AM May 19, 2022Forecast: 6.1 ft 12:00PM May 19, 2022Forecast: 8.3 ft 1:00PM May 19, 2022Forecast: 9.8 ft 2:00PM May 19, 2022GLCM3(plotting HMIRP) Graph Created (7:15PM May 16, 2022)Forecast (issued 4:11PM May 16)Flood Stage is 11.5 ft
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Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Please refer to our Coastal Hazard Message for specific information regarding Coastal Flood Watches, Warnings and Advisories. Actual impacts from any coastal flooding event may vary due to factors such as rainfall, wave action, and the number of tide cycles during which there is an onshore flow. During tropical cyclones, please refer here for additional storm surge information.

NOTE: During a Tropical Storm or Hurricane Watch or Warning, inundation mapping provided by the National Hurricane Center (go to the web site and select the storm of interest) reflects a reasonable worst case scenario. The forecast above is the total water forecast that is most likely to occur.

NOTE: Forecasts for the Atlantic Coast at Gloucester (IN MLLW) are issued routinely year-round.

Vertical Datum references a tidal datum...for more information see Tides and Currents .

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Flood Categories (in feet)
Major Flood Stage: 15
Moderate Flood Stage: 13
Flood Stage: 11.5
Action Stage: 11
Low Stage (in feet): -9999

Historic Crests
(1) 13.13 ft on 01/04/2018
(2) 12.53 ft on 03/02/2018
(3) 12.01 ft on 03/03/2018
(4) 11.93 ft on 07/24/2013
(5) 11.80 ft on 07/23/2013
(6) 11.62 ft on 11/25/2018
(7) 11.59 ft on 03/22/2019
(8) 11.57 ft on 01/20/2019
(9) 11.55 ft on 06/25/2013
(10) 11.52 ft on 03/31/2014
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 11.59 ft on 03/22/2019
(2) 11.57 ft on 01/20/2019
(3) 11.62 ft on 11/25/2018
(4) 12.01 ft on 03/03/2018
(5) 12.53 ft on 03/02/2018
(6) 13.13 ft on 01/04/2018
(7) 11.52 ft on 03/31/2014
(8) 11.93 ft on 07/24/2013
(9) 11.80 ft on 07/23/2013
(10) 11.50 ft on 07/22/2013
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to

Zoom Level:15
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
14 Widespread flooding of low lying coastal areas is expected from Marblehead through Gloucester northward to Salibury. Large surf and high tides will result in significant beach erosion. Evacuations of vulnerable coastal roads is likely along with numerous road closures. Significant structural damage to propery is possible. People in flood prone areas must take action now to protect life and property.
13 Significant flooding of low lying coastal locations is expected from Revere and Winthrop southward through Hull. Road closures and some evacuations of coastal sections is likely. Large swells and wave action will produce significant beach erosion.
12.5 Coastal flooding is expected along the North Shore from Marblehead northward along the coast to Newburyport. The combination of high tides and large swells will result in flooding of some immediate coastal roads and some road closures are anticipated.
12 Coastal flooding is expected along the north shore from Gloucester to Newburyport. Waves action will cause flooding on some coastal roads around the time of high tide.
11.5 Minor coastal flooding is expected along the North Shore from Gloucester to Newburyport. Waves action will likely cause some washover onto coastal roads around the time of high tide.
About This Location Collapse

Latitude: 42.610278° N, Longitude: 70.660556° W, Horizontal Datum: Other

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 11.5 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available 11.5 MLLW (Mean Lower Low Water)
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
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Boston / Norton Weather Forecast Office
46 Commerce Way
Norton, MA 02766
(508) 622-3250
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