Connecticut faces a sheltered estuary, not the open Atlantic — so its shore erodes slowly, on the order of 1 to 3 ft a year where it moves at all, and much of it is already walled. The real exposure is the storm surge the Sound funnels into dense shorefront towns. Here is the measured record.
Long Island Sound was left out of the USGS open-ocean assessment (Open-File Report 2010-1118), then added in the USGS National Shoreline Change release of September 2025, which computes DSAS rates along the CT shore for 1883–2016. Connecticut has no single statewide ft/yr figure — its own 2014 Shoreline Change study (CT DEEP, CT Sea Grant and UConn CLEAR) reports rates per transect, named worst at Cosey Beach and Griswold Point. For the exact rate and base flood elevation at one parcel, see the address certificate.
Is the Connecticut coast eroding?
Yes, modestly — CT DEEP characterizes change as roughly 1 to 3 ft/yr in certain areas. The Sound is a low-energy, heavily armored shore, so there is no single statewide rate and much of the coast is held by seawalls.
Does USGS measure Connecticut shoreline change?
Now it does — Long Island Sound was excluded from the 2010 open-ocean assessment, but the USGS National Shoreline Change release of September 2025 computes DSAS rates along the CT shore for 1883–2016 (long-term) and 1984–2016 (short-term).
How much will sea level rise on the Connecticut coast?
State law — Public Act 18-82 (2018) — directs planning for about 20 inches (0.5 m) of rise in the Sound by 2050, per CIRCA at UConn; NOAA's New London gauge already shows +2.93 mm/yr and Bridgeport +3.44 mm/yr.
Which Connecticut towns flood worst?
Fairfield, New Haven and Bridgeport took the brunt of Hurricane Sandy in 2012, when a ~9-ft surge exceeded the 1938 hurricane across much of the coast (state estimates: about 38,200 homes damaged).
What FEMA flood zone is the Connecticut shore in?
The immediate Sound shore and barrier beaches are mapped Zone VE (coastal high-hazard, waves ≥3 ft), backed by the broader Zone AE floodplain — confirm any parcel on FEMA's National Flood Hazard Layer.
Connecticut's coast doesn't wash away like an open-ocean barrier — it creeps back a foot or two a year and then jumps decades in a single hurricane, because the funnel shape of Long Island Sound stacks surge against the shore. The record is a century of slow loss punctuated by two benchmark storms.
This page is the Connecticut overview. The $99 Psammite certificate reads your exact address: the long-term erosion rate at your parcel, your storm-surge and FEMA exposure, the uncertainty band, and whether a licensed site review is warranted — built from the same USGS, NOAA and FEMA record.