Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

55.6°F

Measurement Time: Friday, October 31, 2025, 10:45 AM EDT

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

53.8°F
Overcast
Conditions: Overcast
Humidity: 50%
Feels Like: 47.5°F
Wind: W 27.1 mph
Wind Gusts: 32 mph
Pressure: 29.29 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0.7

Five Day Weather Forecast

Heavy rain
Fri
H: 57°F
L: 46°F
Partly Cloudy
Sat
H: 55°F
L: 43°F
Sunny
Sun
H: 52°F
L: 39°F
Sunny
Mon
H: 55°F
L: 39°F
Moderate rain
Tue
H: 62°F
L: 50°F

Air Quality

PM2.5: 2.55 μg/m3
PM10: 2.55 μg/m3
Carbon Monoxide: 152.85 μg/m3
Nitrogen Dioxide: 5.45 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 77 μg/m3

Astronomical

Sunrise: 7:20 AM
Sun Transit: 12:33 AM
Sunset: 5:45 PM
Daylight: 10 hrs 26 mins
Moonrise: 3:14 PM
Moon Transit: 8:44 PM
Moonset: 1:14 AM
Moon Phase: First Quarter
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

10:16 AM - 12:46 AM
8:14 PM - 10:44 PM

Minor Periods

2:44 PM - 4:14 PM
12:44 AM - 2:14 AM

Action Rating: 2 out of 5

Wind Advisory issued October 31 at 2:40AM EDT until November 1 at 12:00AM EDT by NWS Upton NY

Effective: Fri October 31, 2025, 2:40 AM
Expires: Fri October 31, 2025, 4:30 PM

* WHAT...West winds 20 to 30 mph with gusts up to 45 mph expected. Isolated gusts of 45 to 50 mph are possible. * WHERE...Southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From noon today to midnight EDT tonight. * IMPACTS...Gusty winds will blow around Halloween decorations and other 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 October 31 at 12:41AM EDT until November 1 at 5:00AM EDT by NWS Boston/Norton MA

Effective: Fri October 31, 2025, 12:41 AM
Expires: Fri October 31, 2025, 7:00 PM

* WHAT...West winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Western and central Massachusetts and Northern Connecticut. * WHEN...From 2 PM this afternoon to 5 AM EDT 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. Secure outdoor objects.


Wind Advisory issued October 31 at 12:41AM EDT until November 1 at 5:00AM EDT by NWS Boston/Norton MA

Effective: Fri October 31, 2025, 12:41 AM
Expires: Fri October 31, 2025, 7:00 PM

* WHAT...West winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Cape Cod, Martha's Vineyard, Nantucket and Block Island. * WHEN...From 2 PM this afternoon to 5 AM EDT 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.


Wind Advisory issued October 31 at 12:41AM EDT until November 1 at 5:00AM EDT by NWS Boston/Norton MA

Effective: Fri October 31, 2025, 12:41 AM
Expires: Fri October 31, 2025, 7:00 PM

* WHAT...West winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Eastern and southeastern Massachusetts, as well as all of Rhode Island excluding Block Island. * WHEN...From 2 PM this afternoon to 5 AM EDT 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. Secure outdoor objects.


Friday, October 31, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 52.7°F
Average Humidity: 82%
Chance of Rain: 84%
Wind: 27.1 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 4.05 μg/m3
PM10: 4.81 μg/m3
Carbon Monoxide: 165.17 μg/m3
Nitrogen Dioxide: 6.52 μg/m3
Sulphur Dioxide: 2.86 μg/m3
Ozone: 67.92 μg/m3

Astronomical

Sunrise: 7:20 AM
Sun Transit: 12:33 AM
Sunset: 5:45 PM
Daylight: 10 hrs 26 mins
Moonrise: 3:14 PM
Moon Transit: 8:44 PM
Moonset: 1:14 AM
Moon Phase: First Quarter
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

10:16 AM - 12:46 AM
8:14 PM - 10:44 PM

Minor Periods

2:44 PM - 4:14 PM
12:44 AM - 2:14 AM

Action Rating: 2 out of 5

Saturday, November 1, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 49.1°F
Average Humidity: 61%
Chance of Rain: 0%
Wind: 27.1 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 2.23 μg/m3
PM10: 2.26 μg/m3
Carbon Monoxide: 151.45 μg/m3
Nitrogen Dioxide: 4.02 μg/m3
Sulphur Dioxide: 1.58 μg/m3
Ozone: 73.16 μg/m3

Astronomical

Sunrise: 7:21 AM
Sun Transit: 12:32 AM
Sunset: 5:44 PM
Daylight: 10 hrs 23 mins
Moonrise: 3:37 PM
Moon Transit: 9:31 PM
Moonset: 2:26 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 83.4%

Best Times for Fishing or Hunting

Major Periods

11:03 AM - 1:33 PM
9:01 PM - 11:31 PM

Minor Periods

3:07 PM - 4:37 PM
1:56 AM - 3:26 AM

Action Rating: 2 out of 5

Sunday, November 2, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 43.5°F
Average Humidity: 63%
Chance of Rain: 0%
Wind: 13 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 3.16 μg/m3
PM10: 3.18 μg/m3
Carbon Monoxide: 178.54 μg/m3
Nitrogen Dioxide: 6.56 μg/m3
Sulphur Dioxide: 1.83 μg/m3
Ozone: 57.38 μg/m3

Astronomical

Sunrise: 7:22 AM
Sun Transit: 12:32 AM
Sunset: 5:43 PM
Daylight: 10 hrs 21 mins
Moonrise: 4:00 PM
Moon Transit: 12:31 AM
Moonset: 3:38 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.9%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 PM
12:01 AM - 2:31 PM

Minor Periods

3:30 PM - 5:00 PM
3:08 AM - 4:38 AM

Action Rating: 2 out of 5

Monday, November 3, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 47.9°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 12.1 mph
UV Index: 3

Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:23 AM
Sun Transit: 12:32 AM
Sunset: 5:42 PM
Daylight: 10 hrs 18 mins
Moonrise: 4:25 PM
Moon Transit: 11:10 PM
Moonset: 4:54 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.3%

Best Times for Fishing or Hunting

Major Periods

12:41 AM - 3:11 PM
12:00 AM - 12:00 AM

Minor Periods

3:55 PM - 5:25 PM
4:24 AM - 5:54 AM

Action Rating: 3 out of 5

Tuesday, November 4, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 57.3°F
Average Humidity: 90%
Chance of Rain: 81%
Wind: 22.1 mph
UV Index: 3

Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:32 AM
Sunset: 5:40 PM
Daylight: 10 hrs 16 mins
Moonrise: 4:52 PM
Moon Transit: 12:00 AM
Moonset: 6:13 AM
Moon Phase: Full
Moon Illumination: 99.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:34 PM - 4:04 PM

Minor Periods

4:22 PM - 5:52 PM
5:43 AM - 7:13 AM

Action Rating: 5 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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