Water Temperature of the Thames River in Groton, CT
Current Water Temperature
Measurement Time: Tuesday, February 3, 2026, 4:15 AM EST
Temperature Locations
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Local Points of Interest
New London, CTStation 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
Thames River, New London, CT (1.7 mi)Mystic River, Noank, CT (5.3 mi)
Mystic Harbor, Mystic, CT (5.9 mi)
Mystic River, Mystic, CT (6 mi)
Mystic River, Old Mystic, CT (6.5 mi)
Pawcatuck River, Westerly, RI (13.1 mi)
Connecticut River, Old Lyme, CT (13.9 mi)
East Branch Eightmile River, Lyme, CT (14.2 mi)
Eightmile River, East Haddam, CT (14.5 mi)
Yantic River, Norwich, CT (14.7 mi)
Orient Harbor, Orient, NY (18.7 mi)
Fort Pond Bay, Montauk, NY (21.7 mi)
Connecticut River, Middletown, CT (27.8 mi)
Natchaug River, Chaplin, CT (32.3 mi)
Hemlock Brook, Foster, RI (36.4 mi)
Weather for Groton, Connecticut
Current Weather

Five Day Weather Forecast

Mon
H: 33°F
L: 25°F

Tue
H: 34°F
L: 15°F

Wed
H: 36°F
L: 21°F

Thu
H: 36°F
L: 27°F

Fri
H: 33°F
L: 21°F
Air Quality
Nitrogen Dioxide: 3.85 μg/m3
Sulphur Dioxide: 2.75 μg/m3
Ozone: 90 μg/m3
Astronomical
Sun Transit: 12:01 AM
Sunset: 5:32 PM
Daylight: 11 hrs mins
Moon Transit: 5:08 PM
Moonset: 12:50 AM
Moon Phase: First Quarter
Moon Illumination: 39.8%
Best Times for Fishing or Hunting
Major Periods
6:38 AM - 9:08 AM4:38 PM - 7:08 PM
Minor Periods
8:52 AM - 10:22 AM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Blizzard Warning issued February 23 at 12:55PM EST until February 23 at 6:00PM EST by NWS Upton NY
Effective: Mon February 23, 2026, 12:55 PM
Expires: Mon February 23, 2026, 6:00 PM
* WHAT...Blizzard conditions. Additional snow accumulations up to two inches. Winds gusting as high as 55 mph. * WHERE...In Connecticut, Southern New London County. In New York, Northeast Suffolk and Southeast Suffolk Counties. * WHEN...Until 6 PM EST this evening. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Whiteout conditions are expected and will make travel treacherous and potentially life-threatening. The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages. Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. The hazardous conditions could impact the Monday evening commute. Strong winds could cause tree damage.
Travel should be restricted to emergencies only. If you must travel, have a winter survival kit with you. If you get stranded, stay with your vehicle. Check local Department of Transportation information services for the latest road conditions. A Blizzard Warning means severe winter weather conditions are expected or occurring. Falling and blowing snow with strong winds are likely. This will lead to whiteout conditions, making travel extremely dangerous. Do not travel. If you must travel, have a winter survival kit with you. If you get stranded, stay in your vehicle.
Blizzard Warning issued February 23 at 12:55PM EST until February 23 at 6:00PM EST by NWS Upton NY
Effective: Mon February 23, 2026, 12:55 PM
Expires: Mon February 23, 2026, 6:00 PM
* WHAT...Blizzard conditions. Additional snow accumulations up to two inches. Winds gusting as high as 50 mph. * WHERE...Portions of southern Connecticut and southeast New York. * WHEN...Until 6 PM EST this evening. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Whiteout conditions are expected and will make travel treacherous and potentially life-threatening. The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages. Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. The hazardous conditions could impact the Monday evening commute. Gusty winds could bring down tree branches.
Travel should be restricted to emergencies only. If you must travel, have a winter survival kit with you. If you get stranded, stay with your vehicle. Check local Department of Transportation information services for the latest road conditions. A Blizzard Warning means severe winter weather conditions are expected or occurring. Falling and blowing snow with strong winds are likely. This will lead to whiteout conditions, making travel extremely dangerous. Do not travel. If you must travel, have a winter survival kit with you. If you get stranded, stay in your vehicle.
Special Weather Statement issued February 23 at 4:53PM EST by NWS Upton NY
Effective: Mon February 23, 2026, 4:53 PM
Expires: Tue February 24, 2026, 10:00 AM
**Black Ice and Blowing Snow Tonight** Black ice will be possible across the region tonight, especially on any untreated surfaces. Gusty winds may also result in localized reduced visibilities due to blowing snow through Tuesday morning. Take caution if traveling, especially on the Tuesday morning commute.
Blizzard Warning issued February 23 at 12:55PM EST until February 23 at 6:00PM EST by NWS Upton NY
Effective: Mon February 23, 2026, 12:55 PM
Expires: Mon February 23, 2026, 6:00 PM
* WHAT...Blizzard conditions. Additional snow accumulations up to two inches. Winds gusting as high as 45 mph. * WHERE...Portions of southern Connecticut and southeast New York. * WHEN...Until 6 PM EST this evening. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Whiteout conditions are expected and will make travel treacherous and potentially life-threatening. The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages. Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. The hazardous conditions could impact the Monday evening commute. Gusty winds could bring down tree branches.
Travel should be restricted to emergencies only. If you must travel, have a winter survival kit with you. If you get stranded, stay with your vehicle. Check local Department of Transportation information services for the latest road conditions. A Blizzard Warning means severe winter weather conditions are expected or occurring. Falling and blowing snow with strong winds are likely. This will lead to whiteout conditions, making travel extremely dangerous. Do not travel. If you must travel, have a winter survival kit with you. If you get stranded, stay in your vehicle.
Blizzard Warning issued February 23 at 3:13AM EST until February 24 at 7:00AM EST by NWS Boston/Norton MA
Effective: Mon February 23, 2026, 3:13 AM
Expires: Mon February 23, 2026, 4:15 PM
* WHAT...Blizzard conditions. Additional snow accumulations between 14 and 21 inches. Winds gusting as high as 75 mph. * WHERE...Portions of eastern and southeastern Massachusetts and Rhode Island. * WHEN...Until 7 AM EST Tuesday. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages. Whiteout conditions are expected and will make travel treacherous and potentially life-threatening. Travel could be very difficult to impossible. Areas of blowing snow could significantly reduce visibility. The hazardous conditions could impact the Monday morning and evening commutes. Very strong winds could cause extensive tree damage.
Travel should be restricted to emergencies only. If you must travel, have a winter survival kit with you. If you get stranded, stay with your vehicle.
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.73 μg/m3
Sulphur Dioxide: 1.92 μg/m3
Ozone: 87.52 μg/m3
Astronomical
Sun Transit: 12:01 AM
Sunset: 5:32 PM
Daylight: 11 hrs mins
Moon Transit: 5:08 PM
Moonset: 12:50 AM
Moon Phase: First Quarter
Moon Illumination: 39.8%
Best Times for Fishing or Hunting
Major Periods
6:38 AM - 9:08 AM4:38 PM - 7:08 PM
Minor Periods
8:52 AM - 10:22 AM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 4.03 μg/m3
Sulphur Dioxide: 2.1 μg/m3
Ozone: 83.8 μg/m3
Astronomical
Sun Transit: 12:01 AM
Sunset: 5:33 PM
Daylight: 11 hrs 2 mins
Moon Transit: 6:08 PM
Moonset: 1:07 AM
Moon Phase: First Quarter
Moon Illumination: 51.1%
Best Times for Fishing or Hunting
Major Periods
7:37 AM - 10:07 AM5:38 PM - 8:08 PM
Minor Periods
9:34 AM - 11:04 AM12:37 AM - 2:07 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 8.28 μg/m3
Sulphur Dioxide: 2.81 μg/m3
Ozone: 76.56 μg/m3
Astronomical
Sun Transit: 12:01 AM
Sunset: 5:34 PM
Daylight: 11 hrs 5 mins
Moon Transit: 7:11 PM
Moonset: 2:20 AM
Moon Phase: First Quarter
Moon Illumination: 62.3%
Best Times for Fishing or Hunting
Major Periods
8:39 AM - 11:09 AM6:41 PM - 9:11 PM
Minor Periods
10:28 AM - 11:58 AM1:50 AM - 3:20 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 11.13 μg/m3
Sulphur Dioxide: 2.5 μg/m3
Ozone: 73.12 μg/m3
Astronomical
Sun Transit: 12:01 AM
Sunset: 5:35 PM
Daylight: 11 hrs 8 mins
Moon Transit: 8:13 PM
Moonset: 3:24 AM
Moon Phase: First Quarter
Moon Illumination: 72.9%
Best Times for Fishing or Hunting
Major Periods
9:42 AM - 12:12 AM7:43 PM - 10:13 PM
Minor Periods
11:33 AM - 1:03 PM2:54 AM - 4:24 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.22 μg/m3
Sulphur Dioxide: 1.7 μg/m3
Ozone: 84.69 μg/m3
Astronomical
Sun Transit: 12:01 AM
Sunset: 5:37 PM
Daylight: 11 hrs 11 mins
Moon Transit: 9:13 PM
Moonset: 4:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.3%
Best Times for Fishing or Hunting
Major Periods
10:43 AM - 1:13 PM8:43 PM - 11:13 PM
Minor Periods
12:46 AM - 2:16 PM3:47 AM - 5:17 AM
Action Rating: 2 out of 5
