Water Temperature of the Thames River in New London, CT

Current Water Temperature

68.5°F

Measurement Time: Tuesday, September 16, 2025, 5:30 PM EDT

Today's Tides

High: September 16, 5:26 AM, 2.41 ft
 Low: September 16, 11:48 AM, 0.63 ft
High: September 16, 6:07 PM, 3.07 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

66°F
Sunny
Conditions: Sunny
Humidity: 78%
Feels Like: 66°F
Wind: ESE 12.1 mph
Wind Gusts: 15.7 mph
Pressure: 30.21 in
Precipitation: 0 in
Cloud Cover: 25%
Visibility: 9 mi
UV Index: 0.7

Five Day Weather Forecast

Partly Cloudy
Tue
H: 71°F
L: 55°F
Fog
Wed
H: 62°F
L: 58°F
Heavy rain
Thu
H: 74°F
L: 62°F
Partly Cloudy
Fri
H: 80°F
L: 62°F
Sunny
Sat
H: 67°F
L: 51°F

Air Quality

AQI: 1 - Good
PM2.5: 12.95 μg/m3
PM10: 17.58 μg/m3
Carbon Monoxide: 392.2 μg/m3
Nitrogen Dioxide: 3.89 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 90 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 12:43 AM
Sunset: 6:55 PM
Daylight: 12 hrs 25 mins
Moonrise: 12:33 AM
Moon Transit: 8:37 AM
Moonset: 4:33 PM
Moon Phase: Last Quarter
Moon Illumination: 23.8%

Best Times for Fishing or Hunting

Major Periods

8:07 AM - 10:37 AM
12:00 AM - 12:00 AM

Minor Periods

4:03 PM - 5:33 PM
12:03 AM - 1:33 AM

Action Rating: 2 out of 5

Rip Current Statement issued September 16 at 1:58AM EDT until September 16 at 8:00PM EDT by NWS Upton NY

Effective: Tue September 16, 2025, 1:58 AM
Expires: Tue September 16, 2025, 8:00 PM

* WHAT...Dangerous rip currents expected. * WHERE...Kings (Brooklyn), Southwest Suffolk, Southeast Suffolk, Southern Queens and Southern Nassau Counties. * WHEN...From 6 AM EDT this morning through this evening. * IMPACTS...Life-threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.

If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.


Rip Current Statement issued September 16 at 1:58AM EDT until September 16 at 8:00PM EDT by NWS Upton NY

Effective: Tue September 16, 2025, 1:58 AM
Expires: Tue September 16, 2025, 8:00 PM

* WHAT...Dangerous rip currents expected. * WHERE...Kings (Brooklyn), Southwest Suffolk, Southeast Suffolk, Southern Queens and Southern Nassau Counties. * WHEN...From 6 AM EDT this morning through this evening. * IMPACTS...Life-threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.

If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.
Tuesday, September 16, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 63.1°F
Average Humidity: 81%
Chance of Rain: 0%
Wind: 12.3 mph
UV Index: 1.3

Air Quality

AQI: 2 - Moderate
PM2.5: 15.81 μg/m3
PM10: 20.04 μg/m3
Carbon Monoxide: 390.87 μg/m3
Nitrogen Dioxide: 6.53 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 92.6 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 12:43 AM
Sunset: 6:55 PM
Daylight: 12 hrs 25 mins
Moonrise: 12:33 AM
Moon Transit: 8:37 AM
Moonset: 4:33 PM
Moon Phase: Last Quarter
Moon Illumination: 23.8%

Best Times for Fishing or Hunting

Major Periods

8:07 AM - 10:37 AM
12:00 AM - 12:00 AM

Minor Periods

4:03 PM - 5:33 PM
12:03 AM - 1:33 AM

Action Rating: 2 out of 5

Wednesday, September 17, 2025

Weather Forecast

Conditions: Fog
Average Temperature: 60.9°F
Average Humidity: 95%
Chance of Rain: 0%
Wind: 10.3 mph
UV Index: 1

Air Quality

AQI: 1 - Good
PM2.5: 12.7 μg/m3
PM10: 18.02 μg/m3
Carbon Monoxide: 352.91 μg/m3
Nitrogen Dioxide: 5.19 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 82.04 μg/m3

Astronomical

Sunrise: 6:31 AM
Sun Transit: 12:42 AM
Sunset: 6:54 PM
Daylight: 12 hrs 22 mins
Moonrise: 1:45 AM
Moon Transit: 9:32 AM
Moonset: 5:08 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:02 AM - 11:32 AM

Minor Periods

4:38 PM - 6:08 PM
1:15 AM - 2:45 AM

Action Rating: 2 out of 5

Thursday, September 18, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 66.5°F
Average Humidity: 91%
Chance of Rain: 85%
Wind: 7.4 mph
UV Index: 1.3

Air Quality

AQI: 1 - Good
PM2.5: 11.47 μg/m3
PM10: 16.35 μg/m3
Carbon Monoxide: 352.39 μg/m3
Nitrogen Dioxide: 7.73 μg/m3
Sulphur Dioxide: 1.62 μg/m3
Ozone: 80.68 μg/m3

Astronomical

Sunrise: 6:32 AM
Sun Transit: 12:42 AM
Sunset: 6:52 PM
Daylight: 12 hrs 20 mins
Moonrise: 2:57 AM
Moon Transit: 10:23 AM
Moonset: 5:36 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:53 AM - 12:23 AM

Minor Periods

5:06 PM - 6:36 PM
2:27 AM - 3:57 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 69.5°F
Average Humidity: 76%
Chance of Rain: 0%
Wind: 12.1 mph
UV Index: 1.4

Air Quality

AQI: 1 - Good
PM2.5: 11.98 μg/m3
PM10: 13.02 μg/m3
Carbon Monoxide: 400.41 μg/m3
Nitrogen Dioxide: 21.38 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 91.32 μg/m3

Astronomical

Sunrise: 6:33 AM
Sun Transit: 12:42 AM
Sunset: 6:50 PM
Daylight: 12 hrs 17 mins
Moonrise: 4:07 AM
Moon Transit: 11:09 AM
Moonset: 6:00 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

12:44 AM - 3:14 AM
10:39 AM - 1:09 PM

Minor Periods

5:30 PM - 7:00 PM
3:37 AM - 5:07 AM

Action Rating: 3 out of 5

Saturday, September 20, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 58.6°F
Average Humidity: 51%
Chance of Rain: 0%
Wind: 12.3 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 5.92 μg/m3
PM10: 6.26 μg/m3
Carbon Monoxide: 352.35 μg/m3
Nitrogen Dioxide: 15.55 μg/m3
Sulphur Dioxide: 2.65 μg/m3
Ozone: 73.31 μg/m3

Astronomical

Sunrise: 6:34 AM
Sun Transit: 12:41 AM
Sunset: 6:49 PM
Daylight: 12 hrs 14 mins
Moonrise: 5:13 AM
Moon Transit: 11:52 AM
Moonset: 6:20 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
11:22 AM - 1:52 PM

Minor Periods

5:50 PM - 7:20 PM
4:43 AM - 6:13 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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