Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

31.8°F

Measurement Time: Wednesday, February 25, 2026, 5:45 AM EST

Temperature Locations

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Local Points of Interest

Ferry Landing State Park

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

34.2°F
Overcast
Overcast
24.2°F
34.5°F
93%
SW 15.4 mph
21.8 mph
26.8°F
33.5°F
0.02 in
100%
8 mi
1005 mbar
0.6

Five Day Weather Forecast

Moderate snow
Wed
H: 44°F
L: 11°F
Cloudy
Thu
H: 39°F
L: 25°F
Sunny
Fri
H: 42°F
L: 25°F
Fog
Sat
H: 41°F
L: 30°F
Moderate snow
Sun
H: 34°F
L: 23°F

Air Quality

AQI: 2 - Moderate
PM2.5: 13.15 μg/m3
PM10: 14.25 μg/m3
Carbon Monoxide: 218.85 μg/m3
Nitrogen Dioxide: 14.25 μg/m3
Sulphur Dioxide: 4.05 μg/m3
Ozone: 80 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 12:02 AM
Sunset: 5:35 PM
Daylight: 11 hrs 5 mins
Moonrise: 10:59 AM
Moon Transit: 7:12 PM
Moonset: 2:21 AM
Moon Phase: First Quarter
Moon Illumination: 62.3%

Best Times for Fishing or Hunting

Major Periods

8:38 AM - 11:08 AM
6:42 PM - 9:12 PM

Minor Periods

10:29 AM - 11:59 AM
1:51 AM - 3:21 AM

Action Rating: 2 out of 5

Special Weather Statement issued February 25 at 2:09AM EST by NWS Upton NY

Effective: Wed February 25, 2026, 2:09 AM
Expires: Wed February 25, 2026, 10:00 AM

Light snow is expected to move through the region this morning, with accumulation up to an inch or two possible, particularly across southern Connecticut and the Lower Hudson Valley. The snow may briefly reduce visibilities, and coupled with areas of black ice, could result in hazardous travel conditions for the morning commute. Motorists and pedestrians are advised to use extra caution. Temperatures rise above freezing by mid to late morning.


Wednesday, February 25, 2026

Weather Forecast

Moderate snow
44.2°F
11.1°F
28.6°F
72%
0.06 in
89%
0%
17 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 9.29 μg/m3
PM10: 10.63 μg/m3
Carbon Monoxide: 225.89 μg/m3
Nitrogen Dioxide: 12.45 μg/m3
Sulphur Dioxide: 3.08 μg/m3
Ozone: 71.32 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 12:02 AM
Sunset: 5:35 PM
Daylight: 11 hrs 5 mins
Moonrise: 10:59 AM
Moon Transit: 7:12 PM
Moonset: 2:21 AM
Moon Phase: First Quarter
Moon Illumination: 62.3%

Best Times for Fishing or Hunting

Major Periods

8:38 AM - 11:08 AM
6:42 PM - 9:12 PM

Minor Periods

10:29 AM - 11:59 AM
1:51 AM - 3:21 AM

Action Rating: 2 out of 5

Thursday, February 26, 2026

Weather Forecast

Cloudy
39°F
25.2°F
34.9°F
75%
0 in
0%
0%
13.6 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 12.65 μg/m3
PM10: 13.26 μg/m3
Carbon Monoxide: 235.85 μg/m3
Nitrogen Dioxide: 16.89 μg/m3
Sulphur Dioxide: 3.86 μg/m3
Ozone: 77.84 μg/m3

Astronomical

Sunrise: 6:29 AM
Sun Transit: 12:02 AM
Sunset: 5:37 PM
Daylight: 11 hrs 8 mins
Moonrise: 12:04 AM
Moon Transit: 8:14 PM
Moonset: 3:25 AM
Moon Phase: First Quarter
Moon Illumination: 72.9%

Best Times for Fishing or Hunting

Major Periods

9:41 AM - 12:11 AM
7:44 PM - 10:14 PM

Minor Periods

11:34 AM - 1:04 PM
2:55 AM - 4:25 AM

Action Rating: 2 out of 5

Friday, February 27, 2026

Weather Forecast

Sunny
42.1°F
24.6°F
32°F
74%
0 in
0%
0%
10.5 mph
0.6


Air Quality

AQI: 2 - Moderate
PM2.5: 16.42 μg/m3
PM10: 17.71 μg/m3
Carbon Monoxide: 264.61 μg/m3
Nitrogen Dioxide: 27.41 μg/m3
Sulphur Dioxide: 3.1 μg/m3
Ozone: 57.88 μg/m3

Astronomical

Sunrise: 6:27 AM
Sun Transit: 12:02 AM
Sunset: 5:38 PM
Daylight: 11 hrs 11 mins
Moonrise: 1:17 PM
Moon Transit: 9:14 PM
Moonset: 4:18 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.3%

Best Times for Fishing or Hunting

Major Periods

10:42 AM - 1:12 PM
8:44 PM - 11:14 PM

Minor Periods

12:47 AM - 2:17 PM
3:48 AM - 5:18 AM

Action Rating: 2 out of 5

Saturday, February 28, 2026

Weather Forecast

Fog
41.4°F
30.2°F
34.8°F
96%
0 in
0%
0%
11.2 mph
0.7


Air Quality

AQI: 2 - Moderate
PM2.5: 17.54 μg/m3
PM10: 21.93 μg/m3
Carbon Monoxide: 288.53 μg/m3
Nitrogen Dioxide: 16.77 μg/m3
Sulphur Dioxide: 3.19 μg/m3
Ozone: 70.72 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 12:01 AM
Sunset: 5:39 PM
Daylight: 11 hrs 13 mins
Moonrise: 2:34 PM
Moon Transit: 10:09 PM
Moonset: 5:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

11:39 AM - 2:09 PM
12:00 AM - 12:00 AM

Minor Periods

2:04 PM - 3:34 PM
4:30 AM - 6:00 AM

Action Rating: 3 out of 5

Sunday, March 1, 2026

Weather Forecast

Moderate snow
34.4°F
22.9°F
29.8°F
76%
0.05 in
76%
19%
14.5 mph
0


Air Quality

AQI: 2 - Moderate
PM2.5: 15.58 μg/m3
PM10: 16.23 μg/m3
Carbon Monoxide: 280.1 μg/m3
Nitrogen Dioxide: 21.95 μg/m3
Sulphur Dioxide: 3.4 μg/m3
Ozone: 69 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 12:01 AM
Sunset: 5:40 PM
Daylight: 11 hrs 16 mins
Moonrise: 3:49 PM
Moon Transit: 11:00 PM
Moonset: 5:32 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

12:32 AM - 3:02 PM
12:00 AM - 12:00 AM

Minor Periods

3:19 PM - 4:49 PM
5:02 AM - 6:32 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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