Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

41.4°F

Measurement Time: Thursday, March 26, 2026, 6:45 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

52°F
Sunny
Sunny
47.3°F
54.4°F
74%
SW 14.5 mph
22.6 mph
51.8°F
48.5°F
0 in
0%
6 mi
1016 mbar
3.2

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 67°F
L: 40°F
Moderate rain
Fri
H: 51°F
L: 34°F
Overcast
Sat
H: 39°F
L: 29°F
Sunny
Sun
H: 45°F
L: 26°F
Patchy rain nearby
Mon
H: 49°F
L: 38°F

Air Quality

AQI: 1 - Good
PM2.5: 10.15 μg/m3
PM10: 12.25 μg/m3
Carbon Monoxide: 184.85 μg/m3
Nitrogen Dioxide: 8.25 μg/m3
Sulphur Dioxide: 2.75 μg/m3
Ozone: 102 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 12:00 AM
Sunset: 7:08 PM
Daylight: 12 hrs 25 mins
Moonrise: 12:08 AM
Moon Transit: 8:08 PM
Moonset: 3:15 AM
Moon Phase: First Quarter
Moon Illumination: 56.4%

Best Times for Fishing or Hunting

Major Periods

9:36 AM - 12:06 AM
7:38 PM - 10:08 PM

Minor Periods

11:38 AM - 1:08 PM
2:45 AM - 4:15 AM

Action Rating: 3 out of 5

Thursday, March 26, 2026

Weather Forecast

Patchy rain nearby
66.7°F
39.7°F
50.7°F
80%
0.07 in
89%
0%
22.6 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 9.71 μg/m3
PM10: 12.76 μg/m3
Carbon Monoxide: 170.69 μg/m3
Nitrogen Dioxide: 5.64 μg/m3
Sulphur Dioxide: 2.03 μg/m3
Ozone: 102.24 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 12:00 AM
Sunset: 7:08 PM
Daylight: 12 hrs 25 mins
Moonrise: 12:08 AM
Moon Transit: 8:08 PM
Moonset: 3:15 AM
Moon Phase: First Quarter
Moon Illumination: 56.4%

Best Times for Fishing or Hunting

Major Periods

9:36 AM - 12:06 AM
7:38 PM - 10:08 PM

Minor Periods

11:38 AM - 1:08 PM
2:45 AM - 4:15 AM

Action Rating: 3 out of 5

Friday, March 27, 2026

Weather Forecast

Moderate rain
51.4°F
34.1°F
45.1°F
72%
0.22 in
78%
0%
21.9 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 11.47 μg/m3
PM10: 12.32 μg/m3
Carbon Monoxide: 209.13 μg/m3
Nitrogen Dioxide: 10.94 μg/m3
Sulphur Dioxide: 2.9 μg/m3
Ozone: 84.08 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 12:00 AM
Sunset: 7:09 PM
Daylight: 12 hrs 28 mins
Moonrise: 1:22 PM
Moon Transit: 9:04 PM
Moonset: 4:00 AM
Moon Phase: First Quarter
Moon Illumination: 67.4%

Best Times for Fishing or Hunting

Major Periods

10:34 AM - 1:04 PM
8:34 PM - 11:04 PM

Minor Periods

12:52 AM - 2:22 PM
3:30 AM - 5:00 AM

Action Rating: 2 out of 5

Saturday, March 28, 2026

Weather Forecast

Overcast
39°F
28.9°F
34.1°F
38%
0 in
0%
0%
14.3 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 6.99 μg/m3
PM10: 7.66 μg/m3
Carbon Monoxide: 204.73 μg/m3
Nitrogen Dioxide: 14.69 μg/m3
Sulphur Dioxide: 2.63 μg/m3
Ozone: 75.6 μg/m3

Astronomical

Sunrise: 6:39 AM
Sun Transit: 12:00 AM
Sunset: 7:10 PM
Daylight: 12 hrs 31 mins
Moonrise: 2:36 PM
Moon Transit: 9:55 PM
Moonset: 4:35 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 77.5%

Best Times for Fishing or Hunting

Major Periods

11:27 AM - 1:57 PM
9:25 PM - 11:55 PM

Minor Periods

2:06 PM - 3:36 PM
4:05 AM - 5:35 AM

Action Rating: 2 out of 5

Sunday, March 29, 2026

Weather Forecast

Sunny
45.3°F
25.9°F
35.2°F
46%
0 in
0%
0%
18.6 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 10.46 μg/m3
PM10: 11.52 μg/m3
Carbon Monoxide: 214.38 μg/m3
Nitrogen Dioxide: 16.57 μg/m3
Sulphur Dioxide: 4.15 μg/m3
Ozone: 71.36 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 12:00 AM
Sunset: 7:11 PM
Daylight: 12 hrs 34 mins
Moonrise: 3:47 PM
Moon Transit: 10:43 PM
Moonset: 5:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.2%

Best Times for Fishing or Hunting

Major Periods

12:15 AM - 2:45 PM
12:00 AM - 12:00 AM

Minor Periods

3:17 PM - 4:47 PM
4:32 AM - 6:02 AM

Action Rating: 2 out of 5

Monday, March 30, 2026

Weather Forecast

Patchy rain nearby
48.9°F
38.4°F
43.7°F
81%
0.05 in
84%
0%
17.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 8.93 μg/m3
PM10: 10.9 μg/m3
Carbon Monoxide: 221.93 μg/m3
Nitrogen Dioxide: 7.1 μg/m3
Sulphur Dioxide: 2.61 μg/m3
Ozone: 100.62 μg/m3

Astronomical

Sunrise: 6:36 AM
Sun Transit: 12:00 AM
Sunset: 7:12 PM
Daylight: 12 hrs 36 mins
Moonrise: 4:56 PM
Moon Transit: 11:27 PM
Moonset: 5:26 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.0%

Best Times for Fishing or Hunting

Major Periods

1:01 PM - 3:31 PM
12:00 AM - 12:00 AM

Minor Periods

4:26 PM - 5:56 PM
4:56 AM - 6:26 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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