Water Temperature of the Thames River in Groton, CT

Current Water Temperature

50.0°F

Measurement Time: Saturday, May 2, 2026, 11:45 PM EDT

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

49.8°F
Patchy rain nearby
Patchy rain nearby
43°F
49.8°F
75%
N 30.6 mph
38.2 mph
43°F
42.7°F
0 in
70%
6 mi
1010 mbar
4.6

Five Day Weather Forecast

Patchy rain nearby
Sat
H: 53°F
L: 44°F
Patchy rain nearby
Sun
H: 68°F
L: 43°F
Patchy rain nearby
Mon
H: 65°F
L: 49°F
Patchy rain nearby
Tue
H: 64°F
L: 44°F
Patchy rain nearby
Wed
H: 67°F
L: 52°F

Air Quality

AQI: 1 - Good
PM2.5: 1.65 μg/m3
PM10: 1.65 μg/m3
Carbon Monoxide: 126.85 μg/m3
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:45 AM
Sunset: 8:14 PM
Daylight: 14 hrs 56 mins
Moonrise: 8:09 PM
Moon Transit: 12:00 AM
Moonset: 4:19 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

7:39 PM - 9:09 PM
3:49 AM - 5:19 AM

Action Rating: 4 out of 5

Wind Advisory issued May 30 at 2:52AM EDT until May 30 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Sat May 30, 2026, 2:52 AM
Expires: Sat May 30, 2026, 8:00 PM

* WHAT...North winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Portions of central, eastern, northeastern, and southeastern Massachusetts and northern and southern Rhode Island. * WHEN...From 8 AM this morning to 8 PM EDT this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and some power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
Saturday, May 30, 2026

Weather Forecast

Patchy rain nearby
53.1°F
43.7°F
51.7°F
72%
0.05 in
89%
0%
30.6 mph
4.8


Air Quality

AQI: 1 - Good
PM2.5: 4.14 μg/m3
PM10: 4.98 μg/m3
Carbon Monoxide: 139.39 μg/m3
Nitrogen Dioxide: 3.15 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 81.75 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:45 AM
Sunset: 8:14 PM
Daylight: 14 hrs 56 mins
Moonrise: 8:09 PM
Moon Transit: 12:00 AM
Moonset: 4:19 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

7:39 PM - 9:09 PM
3:49 AM - 5:19 AM

Action Rating: 4 out of 5

Sunday, May 31, 2026

Weather Forecast

Patchy rain nearby
67.7°F
42.8°F
56°F
65%
0.01 in
82%
0%
10.5 mph
7.3


Air Quality

AQI: 1 - Good
PM2.5: 5.06 μg/m3
PM10: 6.28 μg/m3
Carbon Monoxide: 119.55 μg/m3
Nitrogen Dioxide: 3.07 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 81.29 μg/m3

Astronomical

Sunrise: 5:18 AM
Sun Transit: 12:46 AM
Sunset: 8:15 PM
Daylight: 14 hrs 57 mins
Moonrise: 9:07 PM
Moon Transit: 12:34 AM
Moonset: 4:56 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:04 AM - 2:34 AM
2:57 PM - 5:27 PM

Minor Periods

8:37 PM - 10:07 PM
4:26 AM - 5:56 AM

Action Rating: 4 out of 5

Monday, June 1, 2026

Weather Forecast

Patchy rain nearby
64.5°F
48.9°F
57.8°F
76%
0.1 in
89%
0%
12.3 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 10.58 μg/m3
PM10: 14.33 μg/m3
Carbon Monoxide: 133.72 μg/m3
Nitrogen Dioxide: 4.76 μg/m3
Sulphur Dioxide: 0.58 μg/m3
Ozone: 92.08 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:46 AM
Sunset: 8:16 PM
Daylight: 14 hrs 59 mins
Moonrise: 10:00 PM
Moon Transit: 1:25 AM
Moonset: 5:42 AM
Moon Phase: Full
Moon Illumination: 96.8%

Best Times for Fishing or Hunting

Major Periods

12:55 AM - 3:25 AM
3:49 PM - 6:19 PM

Minor Periods

9:30 PM - 11:00 PM
5:12 AM - 6:42 AM

Action Rating: 4 out of 5

Tuesday, June 2, 2026

Weather Forecast

Patchy rain nearby
64.2°F
44.3°F
56.2°F
77%
0.07 in
89%
0%
21.9 mph
6.8


Air Quality

AQI: 1 - Good
PM2.5: 11.42 μg/m3
PM10: 15.62 μg/m3
Carbon Monoxide: 148.93 μg/m3
Nitrogen Dioxide: 4.52 μg/m3
Sulphur Dioxide: 0.65 μg/m3
Ozone: 85.5 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:46 AM
Sunset: 8:16 PM
Daylight: 15 hrs mins
Moonrise: 10:45 PM
Moon Transit: 2:16 AM
Moonset: 6:35 AM
Moon Phase: Full
Moon Illumination: 91.7%

Best Times for Fishing or Hunting

Major Periods

1:46 AM - 4:16 AM
4:40 PM - 7:10 PM

Minor Periods

10:15 PM - 11:45 PM
6:05 AM - 7:35 AM

Action Rating: 3 out of 5

Wednesday, June 3, 2026

Weather Forecast

Patchy rain nearby
66.6°F
51.9°F
57.7°F
73%
0.07 in
74%
0%
13.4 mph
1.3


Air Quality

AQI: 1 - Good
PM2.5: 8.41 μg/m3
PM10: 12.23 μg/m3
Carbon Monoxide: 116.78 μg/m3
Nitrogen Dioxide: 2.12 μg/m3
Sulphur Dioxide: 0.62 μg/m3
Ozone: 86.44 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:46 AM
Sunset: 8:17 PM
Daylight: 15 hrs 1 mins
Moonrise: 11:21 PM
Moon Transit: 3:07 AM
Moonset: 7:34 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.4%

Best Times for Fishing or Hunting

Major Periods

2:37 AM - 5:07 AM
5:30 PM - 8:00 PM

Minor Periods

12:00 AM - 12:00 AM
7:04 AM - 8:34 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