Water Temperature of the Thames River in Groton, CT

Current Water Temperature

61.5°F

Measurement Time: Tuesday, June 9, 2026, 5:15 AM 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

71.1°F
Sunny
Sunny
71.1°F
80.4°F
79%
S 12.1 mph
21.5 mph
76.9°F
64.9°F
0 in
0%
9 mi
1008 mbar
0.2

Five Day Weather Forecast

Sunny
Sun
H: 90°F
L: 64°F
Moderate rain
Mon
H: 77°F
L: 64°F
Sunny
Tue
H: 71°F
L: 55°F
Partly Cloudy
Wed
H: 71°F
L: 61°F
Patchy rain nearby
Thu
H: 81°F
L: 64°F

Air Quality

AQI: 1 - Good
PM2.5: 11.4 μg/m3
PM10: 15.7 μg/m3
Carbon Monoxide: 120 μg/m3
Nitrogen Dioxide: 2.4 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 126 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 12:48 AM
Sunset: 8:23 PM
Daylight: 15 hrs 9 mins
Moonrise: 4:11 AM
Moon Transit: 12:19 AM
Moonset: 8:32 PM
Moon Phase: New
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

1:45 AM - 4:15 AM
11:49 AM - 2:19 PM

Minor Periods

8:02 PM - 9:32 PM
3:41 AM - 5:11 AM

Action Rating: 5 out of 5

Coastal Flood Statement issued June 14 at 3:36AM EDT until June 16 at 2:00AM EDT by NWS Boston/Norton MA

Effective: Sun June 14, 2026, 3:36 AM
Expires: Sun June 14, 2026, 6:00 PM

* WHAT...Up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways (4.4 to 7.2 feet Mean Lower Low Water) around the evening high tides. * WHERE...Washington, Southern Bristol MA, Southern Plymouth MA, Southeast Providence RI, Eastern Kent RI, Bristol RI, and Newport RI Counties. * WHEN...Through late Monday night. The evening high tide periods tonight and Monday night are of the greatest concern. * IMPACTS...Minor coastal flooding occurs along the most vulnerable shoreline locales in Newport, Portsmouth and Middletown. This includes flooding at parking lots near beaches in Newport, and a portion of Hazard Road. Minor coastal flooding also occurs on several streets in the Common Fence Point area.

Do not drive through flooded roadways.


Coastal Flood Statement issued June 14 at 1:24PM EDT until June 17 at 2:00AM EDT by NWS Boston/Norton MA

Effective: Sun June 14, 2026, 1:24 PM
Expires: Mon June 15, 2026, 12:00 PM

* WHAT...Up to one half foot of inundation above ground level in low-lying areas near shorelines and tidal waterways (4.4 to 7.2 feet Mean Lower Low Water). * WHERE...Washington, Southern Bristol MA, Southern Plymouth MA, Southeast Providence RI, Eastern Kent RI, Bristol RI, and Newport RI Counties. * WHEN...Through late Tuesday night. The high tide cycles tonight, Monday night and Tuesday night are of the most concern. * IMPACTS...Minor coastal flooding occurs along the most vulnerable shoreline locales in Newport, Portsmouth and Middletown. This includes flooding at parking lots near beaches in Newport, and a portion of Hazard Road. Minor coastal flooding also occurs on several streets in the Common Fence Point area.

Do not drive through flooded roadways.
Sunday, June 14, 2026

Weather Forecast

Sunny
90.1°F
64°F
75.9°F
63%
0 in
4%
0%
15.9 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 10.61 μg/m3
PM10: 13.57 μg/m3
Carbon Monoxide: 148.96 μg/m3
Nitrogen Dioxide: 7.21 μg/m3
Sulphur Dioxide: 0.62 μg/m3
Ozone: 91.54 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 12:48 AM
Sunset: 8:23 PM
Daylight: 15 hrs 9 mins
Moonrise: 4:11 AM
Moon Transit: 12:19 AM
Moonset: 8:32 PM
Moon Phase: New
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

1:45 AM - 4:15 AM
11:49 AM - 2:19 PM

Minor Periods

8:02 PM - 9:32 PM
3:41 AM - 5:11 AM

Action Rating: 5 out of 5

Monday, June 15, 2026

Weather Forecast

Moderate rain
76.7°F
64.2°F
70.1°F
73%
0.58 in
74%
0%
13.9 mph
9.1


Air Quality

AQI: 1 - Good
PM2.5: 4.12 μg/m3
PM10: 5.01 μg/m3
Carbon Monoxide: 119.38 μg/m3
Nitrogen Dioxide: 2.43 μg/m3
Sulphur Dioxide: 0.28 μg/m3
Ozone: 88.75 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 12:48 AM
Sunset: 8:24 PM
Daylight: 15 hrs 10 mins
Moonrise: 5:14 AM
Moon Transit: 1:26 PM
Moonset: 9:35 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

2:53 AM - 5:23 AM
12:56 AM - 3:26 PM

Minor Periods

9:05 PM - 10:35 PM
4:44 AM - 6:14 AM

Action Rating: 4 out of 5

Tuesday, June 16, 2026

Weather Forecast

Sunny
71.1°F
55.1°F
64°F
61%
0 in
4%
0%
11.9 mph
8.3


Air Quality

AQI: 1 - Good
PM2.5: 3.71 μg/m3
PM10: 4.7 μg/m3
Carbon Monoxide: 124.92 μg/m3
Nitrogen Dioxide: 3.69 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 64.75 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 12:49 AM
Sunset: 8:24 PM
Daylight: 15 hrs 10 mins
Moonrise: 6:29 AM
Moon Transit: 2:32 PM
Moonset: 10:26 PM
Moon Phase: New
Moon Illumination: 1.0%

Best Times for Fishing or Hunting

Major Periods

4:00 AM - 6:30 AM
2:02 PM - 4:32 PM

Minor Periods

9:56 PM - 11:26 PM
5:59 AM - 7:29 AM

Action Rating: 3 out of 5

Wednesday, June 17, 2026

Weather Forecast

Partly Cloudy
70.5°F
61.1°F
65.4°F
71%
0 in
17%
0%
9.8 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 9.95 μg/m3
PM10: 14.75 μg/m3
Carbon Monoxide: 124.05 μg/m3
Nitrogen Dioxide: 3.43 μg/m3
Sulphur Dioxide: 0.47 μg/m3
Ozone: 79.71 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 12:49 AM
Sunset: 8:24 PM
Daylight: 15 hrs 10 mins
Moonrise: 7:49 AM
Moon Transit: 3:33 PM
Moonset: 11:04 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%

Best Times for Fishing or Hunting

Major Periods

5:03 AM - 7:33 AM
3:03 PM - 5:33 PM

Minor Periods

12:00 AM - 12:00 AM
7:19 AM - 8:49 AM

Action Rating: 3 out of 5

Thursday, June 18, 2026

Weather Forecast

Patchy rain nearby
81.1°F
64.1°F
71.7°F
82%
0.12 in
70%
0%
19.2 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 10.37 μg/m3
PM10: 15.8 μg/m3
Carbon Monoxide: 136.11 μg/m3
Nitrogen Dioxide: 4.37 μg/m3
Sulphur Dioxide: 0.51 μg/m3
Ozone: 71.44 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 12:49 AM
Sunset: 8:25 PM
Daylight: 15 hrs 10 mins
Moonrise: 9:08 AM
Moon Transit: 4:28 PM
Moonset: 12:04 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

6:00 AM - 8:30 AM
3:58 PM - 6:28 PM

Minor Periods

8:38 AM - 10:08 AM
12:00 AM - 12:00 AM

Action Rating: 2 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