Water Temperature of the Thames River in Groton, CT

Current Water Temperature

39.6°F

Measurement Time: Tuesday, January 6, 2026, 4:00 AM EST

Temperature Locations

View Nearby Locations     View All Connecticut Locations     View Locations Near Me

Local Points of Interest

New London, CT

Thames River

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

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

18.1°F
Clear
Clear
7.5°F
12.2°F
48%
NW 8.5 mph
17.9 mph
4.2°F
2.9°F
0 in
0%
9 mi
1015 mbar
0

Five Day Weather Forecast

Light freezing rain
Wed
H: 25°F
L: 1°F
Sunny
Thu
H: 28°F
L: 1°F
Sunny
Fri
H: 21°F
L: 8°F
Sunny
Sat
H: 24°F
L: 8°F
Blizzard
Sun
H: 24°F
L: 16°F

Air Quality

AQI: 1 - Good
PM2.5: 6.25 μg/m3
PM10: 6.35 μg/m3
Carbon Monoxide: 297.85 μg/m3
Nitrogen Dioxide: 7.85 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 67 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:01 AM
Sunset: 5:00 PM
Daylight: 9 hrs 56 mins
Moonrise: 12:08 AM
Moon Transit: 8:16 PM
Moonset: 3:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

9:44 AM - 12:14 AM
7:46 PM - 10:16 PM

Minor Periods

11:38 AM - 1:08 PM
2:47 AM - 4:17 AM

Action Rating: 2 out of 5

Wednesday, January 28, 2026

Weather Forecast

Light freezing rain
24.8°F
1.2°F
12.8°F
61%
0 in
75%
7%
15 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 9.74 μg/m3
PM10: 9.93 μg/m3
Carbon Monoxide: 255.81 μg/m3
Nitrogen Dioxide: 8.03 μg/m3
Sulphur Dioxide: 3.45 μg/m3
Ozone: 69.2 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:01 AM
Sunset: 5:00 PM
Daylight: 9 hrs 56 mins
Moonrise: 12:08 AM
Moon Transit: 8:16 PM
Moonset: 3:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

9:44 AM - 12:14 AM
7:46 PM - 10:16 PM

Minor Periods

11:38 AM - 1:08 PM
2:47 AM - 4:17 AM

Action Rating: 2 out of 5

Thursday, January 29, 2026

Weather Forecast

Sunny
28°F
1.4°F
16.1°F
58%
0 in
0%
3%
15.9 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 6.34 μg/m3
PM10: 6.38 μg/m3
Carbon Monoxide: 263.53 μg/m3
Nitrogen Dioxide: 7.78 μg/m3
Sulphur Dioxide: 2.33 μg/m3
Ozone: 67.72 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:01 AM
Sunset: 5:01 PM
Daylight: 9 hrs 59 mins
Moonrise: 1:07 PM
Moon Transit: 9:21 PM
Moonset: 4:30 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

10:48 AM - 1:18 PM
8:51 PM - 11:21 PM

Minor Periods

12:37 AM - 2:07 PM
4:00 AM - 5:30 AM

Action Rating: 2 out of 5

Friday, January 30, 2026

Weather Forecast

Sunny
20.7°F
8.1°F
14.4°F
56%
0 in
0%
0%
17.7 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 2.77 μg/m3
PM10: 2.84 μg/m3
Carbon Monoxide: 189.89 μg/m3
Nitrogen Dioxide: 3.8 μg/m3
Sulphur Dioxide: 1.41 μg/m3
Ozone: 73.08 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:01 AM
Sunset: 5:02 PM
Daylight: 10 hrs 1 mins
Moonrise: 2:18 PM
Moon Transit: 10:25 PM
Moonset: 5:32 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.4%

Best Times for Fishing or Hunting

Major Periods

11:53 AM - 2:23 PM
12:00 AM - 12:00 AM

Minor Periods

1:48 PM - 3:18 PM
5:02 AM - 6:32 AM

Action Rating: 3 out of 5

Saturday, January 31, 2026

Weather Forecast

Sunny
24.3°F
8.2°F
15.1°F
64%
0 in
0%
0%
15.2 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 3.81 μg/m3
PM10: 3.93 μg/m3
Carbon Monoxide: 202.44 μg/m3
Nitrogen Dioxide: 5.95 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 69.64 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 12:01 AM
Sunset: 5:03 PM
Daylight: 10 hrs 3 mins
Moonrise: 3:35 PM
Moon Transit: 11:25 PM
Moonset: 6:23 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.9%

Best Times for Fishing or Hunting

Major Periods

12:54 AM - 3:24 PM
12:00 AM - 12:00 AM

Minor Periods

3:05 PM - 4:35 PM
5:53 AM - 7:23 AM

Action Rating: 4 out of 5

Sunday, February 1, 2026

Weather Forecast

Blizzard
24.4°F
16°F
20.5°F
86%
0.29 in
68%
63%
27.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 5.44 μg/m3
PM10: 5.85 μg/m3
Carbon Monoxide: 213.7 μg/m3
Nitrogen Dioxide: 10.39 μg/m3
Sulphur Dioxide: 2.24 μg/m3
Ozone: 61.54 μg/m3

Astronomical

Sunrise: 7:00 AM
Sun Transit: 12:01 AM
Sunset: 5:05 PM
Daylight: 10 hrs 5 mins
Moonrise: 4:54 PM
Moon Transit: 12:00 AM
Moonset: 7:01 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:51 PM - 4:21 PM

Minor Periods

4:24 PM - 5:54 PM
6:31 AM - 8:01 AM

Action Rating: 4 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.

Webcams Near Groton, CT

Sponsored Content