Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

31.8°F

Measurement Time: Tuesday, December 30, 2025, 6:45 AM EST

Temperature Locations

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Local Points of Interest

Ferry Landing State Park

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Connecticut River

Station Name: CONNECTICUT RIVER AT OLD LYME, CT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 20 feet

Nearest Address:
336 Ferry Rd
Old Lyme, CT 06371
New London County

GPS Coordinates: 41.3125983, -72.3459166

Nearby Water Temperatures

East Branch Eightmile River, Lyme, CT (8 mi)
Eightmile River, East Haddam, CT (8.9 mi)
Orient Harbor, Orient, NY (12.3 mi)
Thames River, New London, CT (13.6 mi)
Thames River, Groton, CT (13.9 mi)
Mystic River, Noank, CT (18.8 mi)
Connecticut River, Middletown, CT (19.1 mi)
Mystic Harbor, Mystic, CT (19.7 mi)
Mystic River, Mystic, CT (19.9 mi)
Mystic River, Old Mystic, CT (20.4 mi)
Yantic River, Norwich, CT (20.6 mi)
Pawcatuck River, Westerly, RI (27 mi)
Fort Pond Bay, Montauk, NY (27.2 mi)
Quinnipiac River, Wallingford, CT (27.4 mi)
New Haven Harbor, New Haven, CT (29.3 mi)

Weather for Old Lyme, Connecticut

Current Weather

31°F
Mostly cloudy
Mostly cloudy
37%
31°F
17.6°F
W 14.3 mph
33 mph
17.6°F
1002.71 millibars
17.6°F
10%
0 in
75%
10 mi
1

Five Day Weather Forecast

Partly Cloudy
Tue
H: 28°F
L: 23°F
Partly Cloudy
Wed
H: 35°F
L: 26°F
Sunny
Thu
H: 31°F
L: 21°F
Partly Cloudy
Fri
H: 29°F
L: 21°F
Partly Cloudy
Sat
H: 29°F
L: 23°F

Air Quality

AQI: 1 - Good
PM2.5: 1.75 μg/m3
PM10: 1.75 μg/m3
Carbon Monoxide: 156.85 μg/m3
Nitrogen Dioxide: 3.95 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 81 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 11:52 AM
Sunset: 4:30 PM
Daylight: 9 hrs 15 mins
Moonrise: 12:48 AM
Moon Transit: 8:26 PM
Moonset: 2:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

9:54 AM - 12:24 AM
7:56 PM - 10:26 PM

Minor Periods

12:18 AM - 1:48 PM
2:28 AM - 3:58 AM

Action Rating: 2 out of 5

Wind Advisory issued December 30 at 1:16AM EST until December 30 at 6:00PM EST by NWS Upton NY

Effective: Tue December 30, 2025, 1:16 AM
Expires: Tue December 30, 2025, 2:00 PM

* WHAT...West winds 10 to 20 mph with gusts up to 45 mph. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...Until 6 PM EST this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects.


Wind Advisory issued December 30 at 1:50AM EST until December 30 at 6:00PM EST by NWS Upton NY

Effective: Tue December 30, 2025, 1:50 AM
Expires: Tue December 30, 2025, 2:00 PM

* WHAT...West winds 15 to 25 mph with gusts 45 to 50 mph. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...Until 6 PM EST this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects.


Wind Advisory issued December 30 at 2:50AM EST until December 31 at 1:00AM EST by NWS Boston/Norton MA

Effective: Tue December 30, 2025, 2:50 AM
Expires: Tue December 30, 2025, 4:00 PM

* WHAT...West winds 10 to 20 mph with gusts up to 50 mph. * WHERE...Portions of northern Connecticut, all of Massachusetts except for the east slopes of the Berkshires and Northern Worcester County, and Rhode Island. * WHEN...Until 1 AM EST Wednesday. * 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.
Tuesday, December 30, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 26.1°F
Average Humidity: 52%
Chance of Rain: 0%
Wind: 24.4 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.7 μg/m3
PM10: 1.71 μg/m3
Carbon Monoxide: 171.69 μg/m3
Nitrogen Dioxide: 3.88 μg/m3
Sulphur Dioxide: 1.91 μg/m3
Ozone: 72.72 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 11:52 AM
Sunset: 4:30 PM
Daylight: 9 hrs 15 mins
Moonrise: 12:48 AM
Moon Transit: 8:26 PM
Moonset: 2:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

9:54 AM - 12:24 AM
7:56 PM - 10:26 PM

Minor Periods

12:18 AM - 1:48 PM
2:28 AM - 3:58 AM

Action Rating: 2 out of 5

Wednesday, December 31, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 29°F
Average Humidity: 64%
Chance of Rain: 0%
Wind: 19.7 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 2.73 μg/m3
PM10: 2.78 μg/m3
Carbon Monoxide: 170.77 μg/m3
Nitrogen Dioxide: 6.77 μg/m3
Sulphur Dioxide: 3.38 μg/m3
Ozone: 75.24 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 11:52 AM
Sunset: 4:30 PM
Daylight: 9 hrs 15 mins
Moonrise: 1:29 PM
Moon Transit: 9:28 PM
Moonset: 4:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%

Best Times for Fishing or Hunting

Major Periods

10:54 AM - 1:24 PM
8:58 PM - 11:28 PM

Minor Periods

12:59 AM - 2:29 PM
3:49 AM - 5:19 AM

Action Rating: 2 out of 5

Thursday, January 1, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 26.9°F
Average Humidity: 52%
Chance of Rain: 0%
Wind: 19.5 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 6.01 μg/m3
PM10: 6.08 μg/m3
Carbon Monoxide: 200.29 μg/m3
Nitrogen Dioxide: 13.53 μg/m3
Sulphur Dioxide: 7.14 μg/m3
Ozone: 55.76 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 11:53 AM
Sunset: 4:31 PM
Daylight: 9 hrs 16 mins
Moonrise: 2:23 PM
Moon Transit: 10:35 PM
Moonset: 5:37 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.0%

Best Times for Fishing or Hunting

Major Periods

11:59 AM - 2:29 PM
12:00 AM - 12:00 AM

Minor Periods

1:53 PM - 3:23 PM
5:07 AM - 6:37 AM

Action Rating: 2 out of 5

Friday, January 2, 2026

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 24.7°F
Average Humidity: 60%
Chance of Rain: 0%
Wind: 13.9 mph
UV Index: 2

Air Quality

AQI: 1 - Good
PM2.5: 4.08 μg/m3
PM10: 4.18 μg/m3
Carbon Monoxide: 209.9 μg/m3
Nitrogen Dioxide: 7.28 μg/m3
Sulphur Dioxide: 2.55 μg/m3
Ozone: 73.04 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 11:53 AM
Sunset: 4:32 PM
Daylight: 9 hrs 17 mins
Moonrise: 3:29 PM
Moon Transit: 11:41 PM
Moonset: 6:49 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

1:06 PM - 3:36 PM
12:00 AM - 12:00 AM

Minor Periods

2:59 PM - 4:29 PM
6:19 AM - 7:49 AM

Action Rating: 4 out of 5

Saturday, January 3, 2026

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 26.7°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 10.7 mph
UV Index: 2

Air Quality

AQI: 1 - Good
PM2.5: 10.05 μg/m3
PM10: 10.12 μg/m3
Carbon Monoxide: 227.71 μg/m3
Nitrogen Dioxide: 20.55 μg/m3
Sulphur Dioxide: 10.13 μg/m3
Ozone: 49.46 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 11:54 AM
Sunset: 4:33 PM
Daylight: 9 hrs 18 mins
Moonrise: 4:46 PM
Moon Transit: 12:00 AM
Moonset: 7:47 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:11 PM - 4:41 PM

Minor Periods

4:16 PM - 5:46 PM
7:17 AM - 8:47 AM

Action Rating: 6 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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