Water Temperature of the Thames River in Groton, CT

Current Water Temperature

39.0°F

Measurement Time: Wednesday, February 26, 2025, 5:30 AM EST

Temperature Locations

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Local Points of Interest

New London, CT

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Thames River

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

Elevation Above Sea Level: 10 feet / 3 meters

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 (6.0 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)
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)
Bear Tree Brook, Clayville, RI (36.6 mi)

Weather for Groton, Connecticut

Current Weather

42.1°F
Clear
Conditions: Clear
Humidity: 85%
Feels Like: 38.3°F
Wind: NNW 5.8 mph
Wind Gusts: 12.2 mph
Pressure: 29.78 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Cloudy
Wed
H: 53°F
L: 37°F
Overcast
Thu
H: 40°F
L: 35°F
Cloudy
Fri
H: 47°F
L: 36°F
Patchy rain nearby
Sat
H: 45°F
L: 39°F
Patchy rain nearby
Sun
H: 52°F
L: 47°F

Air Quality

PM2.5: 5.74 μg/m3
PM10: 6.11 μg/m3
Carbon Monoxide: 353.35 μg/m3
Nitrogen Dioxide: 5.55 μg/m3
Sulphur Dioxide: 1.67 μg/m3
Ozone: 85 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:57 AM
Sunset: 6:52 PM
Daylight: 11 hrs 48 mins
Moonrise: 5:25 PM
Moon Transit: 12:00 AM
Moonset: 6:31 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:50 PM - 4:20 PM

Minor Periods

4:55 PM - 6:25 PM
6:01 AM - 7:31 AM

Action Rating: 4 out of 5

Wednesday, March 12, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 42.8°F
Average Humidity: 61%
Chance of Rain: 0%
Wind: 13.4 mph
UV Index: 0.8

Air Quality

AQI: 1 - Good
PM2.5: 10.92 μg/m3
PM10: 12.56 μg/m3
Carbon Monoxide: 368.96 μg/m3
Nitrogen Dioxide: 13.76 μg/m3
Sulphur Dioxide: 3.38 μg/m3
Ozone: 84.88 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:57 AM
Sunset: 6:52 PM
Daylight: 11 hrs 48 mins
Moonrise: 5:25 PM
Moon Transit: 12:00 AM
Moonset: 6:31 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:50 PM - 4:20 PM

Minor Periods

4:55 PM - 6:25 PM
6:01 AM - 7:31 AM

Action Rating: 4 out of 5

Thursday, March 13, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 37.5°F
Average Humidity: 61%
Chance of Rain: 0%
Wind: 13.2 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 14.55 μg/m3
PM10: 21.56 μg/m3
Carbon Monoxide: 338.33 μg/m3
Nitrogen Dioxide: 7.6 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 93.72 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:57 AM
Sunset: 6:53 PM
Daylight: 11 hrs 50 mins
Moonrise: 6:28 PM
Moon Transit: 12:14 AM
Moonset: 6:51 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:32 PM - 5:02 PM

Minor Periods

5:58 PM - 7:28 PM
6:21 AM - 7:51 AM

Action Rating: 3 out of 5

Friday, March 14, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 40.6°F
Average Humidity: 80%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 1

Air Quality

AQI: 2 - Moderate
PM2.5: 27.18 μg/m3
PM10: 34.13 μg/m3
Carbon Monoxide: 367.63 μg/m3
Nitrogen Dioxide: 28.01 μg/m3
Sulphur Dioxide: 3.79 μg/m3
Ozone: 65 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 12:57 AM
Sunset: 6:54 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:30 PM
Moon Transit: 12:54 AM
Moonset: 7:10 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:24 AM - 2:54 AM
3:11 PM - 5:41 PM

Minor Periods

7:00 PM - 8:30 PM
6:40 AM - 8:10 AM

Action Rating: 5 out of 5

Saturday, March 15, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 43°F
Average Humidity: 94%
Chance of Rain: 88%
Wind: 9.4 mph
UV Index: 0.5

Air Quality

AQI: 2 - Moderate
PM2.5: 20.22 μg/m3
PM10: 27.78 μg/m3
Carbon Monoxide: 373.27 μg/m3
Nitrogen Dioxide: 13.18 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 75.38 μg/m3

Astronomical

Sunrise: 7:00 AM
Sun Transit: 12:57 AM
Sunset: 6:55 PM
Daylight: 11 hrs 56 mins
Moonrise: 8:31 PM
Moon Transit: 1:34 AM
Moonset: 7:28 AM
Moon Phase: Full
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

1:04 AM - 3:34 AM
3:51 PM - 6:21 PM

Minor Periods

8:01 PM - 9:31 PM
6:58 AM - 8:28 AM

Action Rating: 4 out of 5

Sunday, March 16, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 49.5°F
Average Humidity: 99%
Chance of Rain: 88%
Wind: 26.6 mph
UV Index: 0

Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:56 AM
Sunset: 6:57 PM
Daylight: 11 hrs 59 mins
Moonrise: 9:32 PM
Moon Transit: 2:13 AM
Moonset: 7:47 AM
Moon Phase: Full
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

1:43 AM - 4:13 AM
4:31 PM - 7:01 PM

Minor Periods

9:02 PM - 10:32 PM
7:17 AM - 8:47 AM

Action Rating: 5 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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