Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

38.8°F

Measurement Time: Wednesday, March 11, 2026, 8:45 AM EDT

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

55°F
Mist
Mist
52.6°F
53.4°F
69%
SE 8.9 mph
18.7 mph
50.9°F
51.6°F
0 in
0%
9 mi
1015 mbar
2.5

Five Day Weather Forecast

Patchy rain nearby
Wed
H: 57°F
L: 43°F
Patchy rain nearby
Thu
H: 50°F
L: 32°F
Partly Cloudy
Fri
H: 39°F
L: 31°F
Partly Cloudy
Sat
H: 49°F
L: 32°F
Patchy rain nearby
Sun
H: 36°F
L: 30°F

Air Quality

AQI: 1 - Good
PM2.5: 8.45 μg/m3
PM10: 11.05 μg/m3
Carbon Monoxide: 181.85 μg/m3
Nitrogen Dioxide: 7.25 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 83 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:00 PM
Sunset: 6:52 PM
Daylight: 11 hrs 44 mins
Moonrise: 2:39 AM
Moon Transit: 6:54 AM
Moonset: 11:09 AM
Moon Phase: Last Quarter
Moon Illumination: 36.0%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
9:16 PM - 11:46 PM

Minor Periods

10:39 AM - 12:09 AM
2:09 AM - 3:39 AM

Action Rating: 2 out of 5

Wednesday, March 11, 2026

Weather Forecast

Patchy rain nearby
56.5°F
43.2°F
49.7°F
91%
0.01 in
67%
0%
12.3 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 12.62 μg/m3
PM10: 15.69 μg/m3
Carbon Monoxide: 202.13 μg/m3
Nitrogen Dioxide: 11.26 μg/m3
Sulphur Dioxide: 2.01 μg/m3
Ozone: 76.68 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:00 PM
Sunset: 6:52 PM
Daylight: 11 hrs 44 mins
Moonrise: 2:39 AM
Moon Transit: 6:54 AM
Moonset: 11:09 AM
Moon Phase: Last Quarter
Moon Illumination: 36.0%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
9:16 PM - 11:46 PM

Minor Periods

10:39 AM - 12:09 AM
2:09 AM - 3:39 AM

Action Rating: 2 out of 5

Thursday, March 12, 2026

Weather Forecast

Patchy rain nearby
49.6°F
31.6°F
43.1°F
76%
0.03 in
61%
0%
17 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 7.09 μg/m3
PM10: 8.42 μg/m3
Carbon Monoxide: 164.45 μg/m3
Nitrogen Dioxide: 7.04 μg/m3
Sulphur Dioxide: 1.96 μg/m3
Ozone: 79.88 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 1:00 PM
Sunset: 6:53 PM
Daylight: 11 hrs 47 mins
Moonrise: 3:31 AM
Moon Transit: 7:46 AM
Moonset: 12:03 AM
Moon Phase: Last Quarter
Moon Illumination: 25.6%

Best Times for Fishing or Hunting

Major Periods

7:16 AM - 9:46 AM
12:00 AM - 12:00 AM

Minor Periods

11:33 AM - 1:03 PM
3:01 AM - 4:31 AM

Action Rating: 3 out of 5

Friday, March 13, 2026

Weather Forecast

Partly Cloudy
38.7°F
30.9°F
35.1°F
58%
0 in
0%
0%
23.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 5.56 μg/m3
PM10: 6.71 μg/m3
Carbon Monoxide: 172.49 μg/m3
Nitrogen Dioxide: 7.71 μg/m3
Sulphur Dioxide: 2.28 μg/m3
Ozone: 81.8 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:58 AM
Sunset: 6:54 PM
Daylight: 11 hrs 50 mins
Moonrise: 4:16 AM
Moon Transit: 8:38 AM
Moonset: 1:04 PM
Moon Phase: Waning Crescent
Moon Illumination: 16.4%

Best Times for Fishing or Hunting

Major Periods

8:08 AM - 10:38 AM
12:00 AM - 12:00 AM

Minor Periods

12:34 AM - 2:04 PM
3:46 AM - 5:16 AM

Action Rating: 2 out of 5

Saturday, March 14, 2026

Weather Forecast

Partly Cloudy
48.7°F
31.9°F
40.5°F
65%
0 in
0%
0%
26.4 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 4.23 μg/m3
PM10: 5.21 μg/m3
Carbon Monoxide: 165.71 μg/m3
Nitrogen Dioxide: 4.77 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 97.32 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:58 AM
Sunset: 6:55 PM
Daylight: 11 hrs 53 mins
Moonrise: 4:54 AM
Moon Transit: 9:28 AM
Moonset: 2:10 PM
Moon Phase: Waning Crescent
Moon Illumination: 8.9%

Best Times for Fishing or Hunting

Major Periods

8:58 AM - 11:28 AM
12:00 AM - 12:00 AM

Minor Periods

1:40 PM - 3:10 PM
4:24 AM - 5:54 AM

Action Rating: 2 out of 5

Sunday, March 15, 2026

Weather Forecast

Patchy rain nearby
35.9°F
29.7°F
33.8°F
63%
0.09 in
89%
8%
18.3 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 3.93 μg/m3
PM10: 4.39 μg/m3
Carbon Monoxide: 188.4 μg/m3
Nitrogen Dioxide: 6.39 μg/m3
Sulphur Dioxide: 2.35 μg/m3
Ozone: 87.69 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 12:58 AM
Sunset: 6:56 PM
Daylight: 11 hrs 55 mins
Moonrise: 5:25 AM
Moon Transit: 10:17 AM
Moonset: 3:18 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:47 AM - 12:17 AM

Minor Periods

2:48 PM - 4:18 PM
4:55 AM - 6:25 AM

Action Rating: 2 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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