Station Name: THAMES R AT GROTON, CT.
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 10 feet

Nearest Address:
515 Thames St
Groton, CT 06340
New London County

GPS Coordinates: 41.34870948, -72.0820204

Nearby Water Temperatures

Winter Storm Warning issued January 25 at 8:44PM EST until January 26 at 1:00PM EST by NWS Upton NY

Effective: Sun January 25, 2026, 8:44 PM
Expires: Mon January 26, 2026, 6:00 AM

* WHAT...Mainly snow, but a mix of sleet and snow mainly near the Connecticut coast and parts of the Lower Hudson Valley. Light freezing rain or drizzle possible late tonight. Additional snow accumulations between 1 and 3 inches and ice accumulations around a light glaze. Winds gusting as high as 35 mph. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...Until 1 PM EST Monday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Visibilities may briefly drop below 1/4 mile due to falling and blowing snow. * ADDITIONAL DETAILS...Snow showers will still be possible through Monday morning with little potential additional accumulation. Hazardous road conditions are anticipated regardless.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Check local Department of Transportation information services for the latest road conditions.

Special Weather Statement issued January 26 at 2:01AM EST by NWS Upton NY

Effective: Mon January 26, 2026, 2:01 AM
Expires: Mon January 26, 2026, 10:00 AM

Although the accumulating snow has ended, roadways and walkways will remain icy and slippery with some occasional light snow and flurries through this morning. Some locations have received spotty light freezing drizzle as well. Exercise caution if traveling or being outdoors as temperatures will remain well below freezing.

Winter Storm Warning issued January 25 at 12:41PM EST until January 26 at 8:00PM EST by NWS Boston/Norton MA

Effective: Sun January 25, 2026, 12:41 PM
Expires: Mon January 26, 2026, 7:00 AM

* WHAT...Heavy snow expected. Total snow accumulations between 12 and 20 inches. Localized higher amounts of 20 to 24 inches across northeast and western Massachusetts are possible. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern and southern Rhode Island. * WHEN...Until 8 PM EST Monday. * IMPACTS...Travel will be difficult due to low visibility and snow covered roads.

Consider delaying all travel during the storm. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency.

Winter Storm Warning issued January 25 at 12:41PM EST until January 26 at 8:00PM EST by NWS Boston/Norton MA

Effective: Sun January 25, 2026, 12:41 PM
Expires: Mon January 26, 2026, 7:00 AM

* WHAT...Heavy snow expected. Total snow and sleet accumulations between 7 and 12 inches. Winds gusting as high as 35 mph. * WHERE...In Massachusetts, Dukes MA and Nantucket MA Counties. In Rhode Island, Block Island RI. * WHEN...Until 8 PM EST Monday. * IMPACTS...Travel will be difficult due to low visibility and snow covered roads.

Consider delaying all travel during the storm. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency.

Winter Storm Warning issued January 26 at 2:01AM EST until January 26 at 8:00PM EST by NWS Boston/Norton MA

Effective: Mon January 26, 2026, 2:01 AM
Expires: Mon January 26, 2026, 5:00 PM

* WHAT...Heavy snow. Additional snow accumulations 1-5 inches. The highest amounts are expected along the immediate northeastern coastline. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern and southern Rhode Island. * WHEN...Until 8 PM EST this evening. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Persons should consider delaying all travel. Motorists should use extreme caution if travel is absolutely necessary.