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

Wind Advisory issued March 15 at 2:26PM EDT until March 17 at 4:00AM EDT by NWS Upton NY

Effective: Sun March 15, 2026, 2:26 PM
Expires: Mon March 16, 2026, 6:00 AM

* WHAT...South winds 15 to 25 mph with gusts up to 50 mph expected. Isolated gusts up to 55 mph. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From 2 PM Monday to 4 AM EDT Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects.

Flood Watch issued March 15 at 2:22PM EDT until March 17 at 8:00AM EDT by NWS Upton NY

Effective: Sun March 15, 2026, 2:22 PM
Expires: Mon March 16, 2026, 6:00 AM

* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...All of southern Connecticut, including the following areas, Northern Fairfield, Northern Middlesex, Northern New Haven, Northern New London, Southern Fairfield, Southern Middlesex, Southern New Haven and Southern New London. * WHEN...From late tonight through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Flood Watch issued March 16 at 2:26AM EDT until March 17 at 8:00AM EDT by NWS Upton NY

Effective: Mon March 16, 2026, 2:26 AM
Expires: Mon March 16, 2026, 4:30 PM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of southern Connecticut, including the following areas, Northern Fairfield, Northern Middlesex, Northern New Haven, Northern New London, Southern Fairfield, Southern Middlesex, Southern New Haven and Southern New London. * WHEN...Through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Wind Advisory issued March 16 at 2:25AM EDT until March 17 at 4:00AM EDT by NWS Upton NY

Effective: Mon March 16, 2026, 2:25 AM
Expires: Mon March 16, 2026, 4:30 PM

* WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Portions of southern Connecticut, northeastern New Jersey, and southeastern New York. * WHEN...From 2 PM this afternoon to 4 AM EDT Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects.

Flood Watch issued March 15 at 12:14PM EDT until March 17 at 8:00AM EDT by NWS Boston/Norton MA

Effective: Sun March 15, 2026, 12:14 PM
Expires: Mon March 16, 2026, 5:00 AM

Heavy rain may fall on a deep primed snowpack leading to the melt increasing. Flows in rivers may increase quickly and reach critical levels. * WHAT...Flooding caused by rain and snowmelt is possible. * WHERE...Portions of northern Connecticut, including the following areas, Hartford CT, Tolland CT and Windham CT, Massachusetts, including the following areas, Barnstable MA, Central Middlesex MA, Eastern Essex MA, Eastern Franklin MA, Eastern Hampden MA, Eastern Hampshire MA, Eastern Norfolk MA, Eastern Plymouth MA, Northern Bristol MA, Northern Middlesex MA, Northern Worcester MA, Southeast Middlesex MA, Southern Bristol MA, Southern Plymouth MA, Southern Worcester MA, Suffolk MA, Western Essex MA, Western Franklin MA, Western Hampden MA, Western Hampshire MA, Western Norfolk MA and Western Plymouth MA, and Rhode Island, including the following areas, Bristol RI, Eastern Kent RI, Newport RI, Northwest Providence RI, Southeast Providence RI, Washington RI and Western Kent RI. * WHEN...From late tonight through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.