Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

35.8°F

Measurement Time: Friday, December 19, 2025, 4:45 PM 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 / 6 meters

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 (8.0 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 (27.0 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

37°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 52%
Feels Like: 25.5°F
Wind: W 24.4 mph
Wind Gusts: 34.4 mph
Pressure: 29.63 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Heavy rain
Fri
H: 57°F
L: 32°F
Partly Cloudy
Sat
H: 40°F
L: 30°F
Partly Cloudy
Sun
H: 41°F
L: 29°F
Sunny
Mon
H: 35°F
L: 24°F
Moderate rain
Tue
H: 39°F
L: 33°F

Air Quality

AQI: 1 - Good
PM2.5: 1.65 μg/m3
PM10: 1.65 μg/m3
Carbon Monoxide: 167.85 μg/m3
Nitrogen Dioxide: 3.45 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 67 μg/m3

Astronomical

Sunrise: 7:11 AM
Sun Transit: 11:46 AM
Sunset: 4:23 PM
Daylight: 9 hrs 12 mins
Moonrise: 7:11 AM
Moon Transit: 11:27 AM
Moonset: 3:42 PM
Moon Phase: New
Moon Illumination: 1.1%

Best Times for Fishing or Hunting

Major Periods

12:57 AM - 3:27 AM
10:57 AM - 1:27 PM

Minor Periods

3:12 PM - 4:42 PM
6:41 AM - 8:11 AM

Action Rating: 5 out of 5

Wind Advisory issued December 19 at 2:01PM EST until December 20 at 12:00AM EST by NWS Upton NY

Effective: Fri December 19, 2025, 2:01 PM
Expires: Sat December 20, 2025, 12:00 AM

* WHAT...West winds 15 to 25 mph with gusts up to 55 mph. Isolated wind gusts of 60 mph are possible through early this evening. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...Until midnight EST tonight. * 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.


Special Weather Statement issued December 19 at 7:27PM EST by NWS Upton NY

Effective: Fri December 19, 2025, 7:27 PM
Expires: Sat December 20, 2025, 2:00 AM

Lingering rain and snow showers continue to wet roads as colder air is filtering in to the area. There is potential for black ice to develop through the evening and overnight as temperatures fall below freezing. This may lead untreated surfaces and roads becoming slick. Motorists and pedestrians should use caution. Reduce speed, allow extra time, and be prepared for areas of slippery travel.


Wind Advisory issued December 19 at 2:01PM EST until December 20 at 12:00AM EST by NWS Upton NY

Effective: Fri December 19, 2025, 2:01 PM
Expires: Sat December 20, 2025, 12:00 AM

* WHAT...West winds 15 to 25 mph with gusts up to 55 mph. * WHERE...In Connecticut, Southern New London County. In New York, Northeast Suffolk and Southeast Suffolk Counties. * WHEN...Until midnight EST tonight. * 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 19 at 2:34PM EST until December 20 at 7:00AM EST by NWS Boston/Norton MA

Effective: Fri December 19, 2025, 2:34 PM
Expires: Sat December 20, 2025, 5:00 AM

* WHAT...West winds 15 to 25 mph with gusts up to 50 mph. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, and western Massachusetts, and northern Rhode Island. * WHEN...Until 7 AM EST Saturday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and some power outages may result. * ADDITIONAL DETAILS...Infrequent gusts up to 60 mph are possible across the high terrain of the Berkshires and the northern Worcester Hills.

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


Wind Advisory issued December 19 at 2:34PM EST until December 20 at 7:00AM EST by NWS Boston/Norton MA

Effective: Fri December 19, 2025, 2:34 PM
Expires: Sat December 20, 2025, 5:00 AM

* WHAT...West winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Portions of eastern, northeastern, and southeastern Massachusetts and northern and southern Rhode Island. * WHEN...Until 7 AM EST Saturday. * 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.
Friday, December 19, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 48.7°F
Average Humidity: 86%
Chance of Rain: 89%
Wind: 32.9 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 7.99 μg/m3
PM10: 11.12 μg/m3
Carbon Monoxide: 152.93 μg/m3
Nitrogen Dioxide: 5.62 μg/m3
Sulphur Dioxide: 2.29 μg/m3
Ozone: 78.08 μg/m3

Astronomical

Sunrise: 7:11 AM
Sun Transit: 11:46 AM
Sunset: 4:23 PM
Daylight: 9 hrs 12 mins
Moonrise: 7:11 AM
Moon Transit: 11:27 AM
Moonset: 3:42 PM
Moon Phase: New
Moon Illumination: 1.1%

Best Times for Fishing or Hunting

Major Periods

12:57 AM - 3:27 AM
10:57 AM - 1:27 PM

Minor Periods

3:12 PM - 4:42 PM
6:41 AM - 8:11 AM

Action Rating: 5 out of 5

Saturday, December 20, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 33.4°F
Average Humidity: 64%
Chance of Rain: 0%
Wind: 24.6 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 2.81 μg/m3
PM10: 2.91 μg/m3
Carbon Monoxide: 180.41 μg/m3
Nitrogen Dioxide: 8.43 μg/m3
Sulphur Dioxide: 2.91 μg/m3
Ozone: 66.4 μg/m3

Astronomical

Sunrise: 7:11 AM
Sun Transit: 11:47 AM
Sunset: 4:23 PM
Daylight: 9 hrs 12 mins
Moonrise: 8:03 AM
Moon Transit: 12:19 AM
Moonset: 4:38 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

4:08 PM - 5:38 PM
7:33 AM - 9:03 AM

Action Rating: 5 out of 5

Sunday, December 21, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 37.4°F
Average Humidity: 68%
Chance of Rain: 0%
Wind: 19.2 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 6.16 μg/m3
PM10: 7.22 μg/m3
Carbon Monoxide: 188.93 μg/m3
Nitrogen Dioxide: 11.03 μg/m3
Sulphur Dioxide: 4.57 μg/m3
Ozone: 60.92 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 11:47 AM
Sunset: 4:24 PM
Daylight: 9 hrs 12 mins
Moonrise: 8:47 AM
Moon Transit: 1:11 PM
Moonset: 5:40 PM
Moon Phase: New
Moon Illumination: 1.5%

Best Times for Fishing or Hunting

Major Periods

2:42 AM - 5:12 AM
12:41 AM - 3:11 PM

Minor Periods

5:10 PM - 6:40 PM
8:17 AM - 9:47 AM

Action Rating: 3 out of 5

Monday, December 22, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 29.3°F
Average Humidity: 46%
Chance of Rain: 0%
Wind: 19.9 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 2.2 μg/m3
PM10: 2.32 μg/m3
Carbon Monoxide: 154.84 μg/m3
Nitrogen Dioxide: 4.65 μg/m3
Sulphur Dioxide: 1.78 μg/m3
Ozone: 72.8 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 11:48 AM
Sunset: 4:24 PM
Daylight: 9 hrs 12 mins
Moonrise: 9:23 AM
Moon Transit: 2:01 PM
Moonset: 6:46 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.5%

Best Times for Fishing or Hunting

Major Periods

3:32 AM - 6:02 AM
1:31 PM - 4:01 PM

Minor Periods

6:16 PM - 7:46 PM
8:53 AM - 10:23 AM

Action Rating: 3 out of 5

Tuesday, December 23, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 36.3°F
Average Humidity: 86%
Chance of Rain: 72%
Wind: 16.8 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 9.73 μg/m3
PM10: 10.13 μg/m3
Carbon Monoxide: 226.9 μg/m3
Nitrogen Dioxide: 29.77 μg/m3
Sulphur Dioxide: 7.79 μg/m3
Ozone: 34.62 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:48 AM
Sunset: 4:25 PM
Daylight: 9 hrs 12 mins
Moonrise: 9:54 AM
Moon Transit: 2:49 PM
Moonset: 7:53 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.7%

Best Times for Fishing or Hunting

Major Periods

4:21 AM - 6:51 AM
2:19 PM - 4:49 PM

Minor Periods

7:23 PM - 8:53 PM
9:24 AM - 10:54 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.

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