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Atlantic Coast at Seavey Island (IN MLLW) — water level right now

York County, New Hampshire · NWS gauge SEIM1
Loading the latest reading…
–
current stage (ft)
 
11.5
minor flood stage
 
12.41
record crest
set 2022-12-23
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flood status
official NWS category
Official NOAA forecast → Full US flood map →

Flood stages at this gauge

Where the water stands right now against the four official thresholds:

action · 10
minor · 11.5
moderate · 12.5
major · 13.5
Flood stageLevel (ft)What it means
Major flood stage13.5extensive inundation and significant evacuations — a serious event
Moderate flood stage12.5some buildings and roads inundated; evacuations possible
Minor flood stage11.5low-lying roads and fields near the river start to flood
Action stage10water is approaching flood level — time to pay attention

Highest floods on record here

#Crest (ft)Datevs. minor flood stage
112.412022-12-23+0.91 above

Historic crests recorded at this gauge by the National Weather Service — the 12 highest on file.

Where this gauge is

The marker is this gauge; nearby gauges load live and are clickable.

Nearby river gauges

Lamprey River near Newmarket 11 mi away · loading… Atlantic Coast at Hampton (IN MLLW) 13 mi away · loading… Suncook River at North Chichester 34 mi away · loading… Merrimack River at Goffs Falls 38 mi away · loading… Merrimack River at Concord 41 mi away · loading… Piscataquog River at Goffstown 41 mi away · loading…

Gauge details

NWS gauge IDSEIM1
CountyYork
StateNew Hampshire
NWS forecast officeGray
River forecast centerNortheast River Forecast Center
Coordinates43.08, -70.741
Time zoneEST5EDT
Turn Around, Don't Drown. Six inches of moving water can knock you off your feet and twelve inches can float a car. Never drive around barricades or into water of unknown depth — most flood deaths happen in vehicles.

Questions about Atlantic Coast at Seavey Island (IN MLLW)

Is Atlantic Coast at Seavey Island (IN MLLW) flooding right now?

The live reading at the top of this page answers that: the gauge is compared against its official NWS flood stages every 15 minutes. Minor flooding at this gauge begins at 11.5 ft. Blue means normal, yellow is action stage, orange minor, red moderate and dark red major flooding.

What is flood stage for Atlantic Coast at Seavey Island (IN MLLW)?

major flood stage 13.5 ft, moderate flood stage 12.5 ft, minor flood stage 11.5 ft, action stage 10 ft. These are official National Weather Service thresholds set specifically for this gauge, not generic values.

What is the record flood at Atlantic Coast at Seavey Island (IN MLLW)?

The highest crest on file at this gauge is 12.41 ft, reached on 2022-12-23 — that is 0.91 ft above minor flood stage. The full list of the highest crests is in the table on this page.

Where does this data come from?

From the NOAA National Water Prediction Service, the official U.S. river gauge network — a U.S. government work in the public domain. Live stage is refreshed every 15 minutes; flood thresholds and historic crests are refreshed monthly. For life-safety decisions follow NWS Gray and local emergency management.