Water Temperature of the Thames River in New London, CT

Current Water Temperature

42.8°F

Measurement Time: Wednesday, December 17, 2025, 11:42 PM EST

Today's Tides

Low: December 17, 1:14 AM, 0.47 ft
 High: December 17, 7:21 AM, 2.81 ft
Low: December 17, 2:10 PM, 0.12 ft
 High: December 17, 7:48 PM, 1.97 ft

Temperature Locations

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Local Points of Interest

Riverside Park; Groton, CT

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Thames River

Station Name: New London
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 26 feet / 8 meters

Sensor Depth: -3.1 feet / -1.0 meters

Nearest Address:
United States Coast Guard Academy
New London, CT 06320
New London County

GPS Coordinates: 41.3717, -72.095525

Nearby Water Temperatures

Thames River, Groton, CT (1.7 mi)
Mystic River, Noank, CT (6.5 mi)
Mystic River, Mystic, CT (6.7 mi)
Mystic Harbor, Mystic, CT (6.8 mi)
Mystic River, Old Mystic, CT (6.9 mi)
East Branch Eightmile River, Lyme, CT (13.0 mi)
Yantic River, Norwich, CT (13.0 mi)
Eightmile River, East Haddam, CT (13.2 mi)
Connecticut River, Old Lyme, CT (13.6 mi)
Pawcatuck River, Westerly, RI (13.6 mi)
Orient Harbor, Orient, NY (19.6 mi)
Fort Pond Bay, Montauk, NY (23.4 mi)
Connecticut River, Middletown, CT (26.4 mi)
Natchaug River, Chaplin, CT (30.7 mi)
Hemlock Brook, Foster, RI (35.5 mi)

Weather for New London, Connecticut

Current Weather

37.9°F
Clear
Conditions: Clear
Humidity: 64%
Feels Like: 30.2°F
Wind: WNW 12.1 mph
Wind Gusts: 21.5 mph
Pressure: 30.14 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Wed
H: 48°F
L: 26°F
Partly Cloudy
Thu
H: 45°F
L: 31°F
Heavy rain
Fri
H: 52°F
L: 35°F
Partly Cloudy
Sat
H: 32°F
L: 25°F
Patchy rain nearby
Sun
H: 43°F
L: 28°F

Air Quality

AQI: 1 - Good
PM2.5: 2.05 μg/m3
PM10: 2.15 μg/m3
Carbon Monoxide: 175.85 μg/m3
Nitrogen Dioxide: 4.85 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 63 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 11:44 AM
Sunset: 4:21 PM
Daylight: 9 hrs 12 mins
Moonrise: 5:10 AM
Moon Transit: 9:45 AM
Moonset: 2:15 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:15 AM - 11:45 AM

Minor Periods

1:45 PM - 3:15 PM
4:40 AM - 6:10 AM

Action Rating: 2 out of 5

Wednesday, December 17, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 35.5°F
Average Humidity: 68%
Chance of Rain: 0%
Wind: 19.2 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 10.6 μg/m3
PM10: 11.72 μg/m3
Carbon Monoxide: 267.97 μg/m3
Nitrogen Dioxide: 19.95 μg/m3
Sulphur Dioxide: 8.75 μg/m3
Ozone: 50.96 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 11:44 AM
Sunset: 4:21 PM
Daylight: 9 hrs 12 mins
Moonrise: 5:10 AM
Moon Transit: 9:45 AM
Moonset: 2:15 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:15 AM - 11:45 AM

Minor Periods

1:45 PM - 3:15 PM
4:40 AM - 6:10 AM

Action Rating: 2 out of 5

Thursday, December 18, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 39.3°F
Average Humidity: 83%
Chance of Rain: 0%
Wind: 13.4 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 4.99 μg/m3
PM10: 6.22 μg/m3
Carbon Monoxide: 223.89 μg/m3
Nitrogen Dioxide: 6.51 μg/m3
Sulphur Dioxide: 2.01 μg/m3
Ozone: 66.2 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 11:45 AM
Sunset: 4:21 PM
Daylight: 9 hrs 12 mins
Moonrise: 6:12 AM
Moon Transit: 10:34 AM
Moonset: 2:54 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:07 AM - 2:37 AM
10:04 AM - 12:34 AM

Minor Periods

2:24 PM - 3:54 PM
5:42 AM - 7:12 AM

Action Rating: 4 out of 5

Friday, December 19, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 47.5°F
Average Humidity: 88%
Chance of Rain: 85%
Wind: 33.6 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 7.07 μg/m3
PM10: 10.01 μg/m3
Carbon Monoxide: 149.29 μg/m3
Nitrogen Dioxide: 3.69 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 80.68 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 11:45 AM
Sunset: 4:21 PM
Daylight: 9 hrs 12 mins
Moonrise: 7:10 AM
Moon Transit: 11:26 AM
Moonset: 3:41 PM
Moon Phase: New
Moon Illumination: 1.1%

Best Times for Fishing or Hunting

Major Periods

12:58 AM - 3:28 AM
10:56 AM - 1:26 PM

Minor Periods

3:11 PM - 4:41 PM
6:40 AM - 8:10 AM

Action Rating: 5 out of 5

Saturday, December 20, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 30.6°F
Average Humidity: 58%
Chance of Rain: 0%
Wind: 24.2 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 2.48 μg/m3
PM10: 2.69 μg/m3
Carbon Monoxide: 172.37 μg/m3
Nitrogen Dioxide: 6.45 μg/m3
Sulphur Dioxide: 2.24 μg/m3
Ozone: 70.76 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 11:46 AM
Sunset: 4:22 PM
Daylight: 9 hrs 11 mins
Moonrise: 8:02 AM
Moon Transit: 12:18 AM
Moonset: 4:37 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:50 AM - 4:20 AM
11:48 AM - 2:18 PM

Minor Periods

4:07 PM - 5:37 PM
7:32 AM - 9:02 AM

Action Rating: 5 out of 5

Sunday, December 21, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 38.9°F
Average Humidity: 65%
Chance of Rain: 81%
Wind: 22.8 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 6.33 μg/m3
PM10: 8.97 μg/m3
Carbon Monoxide: 162.62 μg/m3
Nitrogen Dioxide: 5.32 μg/m3
Sulphur Dioxide: 2.56 μg/m3
Ozone: 74.23 μg/m3

Astronomical

Sunrise: 7:11 AM
Sun Transit: 11:46 AM
Sunset: 4:22 PM
Daylight: 9 hrs 11 mins
Moonrise: 8:47 AM
Moon Transit: 1:10 PM
Moonset: 5:39 PM
Moon Phase: New
Moon Illumination: 1.5%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
12:40 AM - 3:10 PM

Minor Periods

5:09 PM - 6:39 PM
8:17 AM - 9:47 AM

Action Rating: 3 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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