Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

74.1°F

Measurement Time: Friday, September 18, 2026, 4:45 PM 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

68°F
Partly Cloudy
Partly Cloudy
73%
N 3 mph
59°F

Weather Forecast

Partly Cloudy
Tonight
52°F - Partly Cloudy
Mostly Sunny
Saturday
69°F - Mostly Sunny
Mostly Cloudy
Saturday Night
54°F - Mostly Cloudy
Showers And Thunderstorms
Sunday
69°F - Showers And Thunderstorms
Showers And Thunderstorms
Sunday Night
56°F - Showers And Thunderstorms
Rain Showers Likely
Monday
68°F - Rain Showers Likely
Slight Chance Rain Showers
Monday Night
51°F - Slight Chance Rain Showers
Slight Chance Rain Showers
Tuesday
65°F - Slight Chance Rain Showers
Mostly Cloudy
Tuesday Night
50°F - Mostly Cloudy
Partly Sunny then Slight Chance Rain Showers
Wednesday
65°F - Partly Sunny then Slight Chance Rain Showers
Chance Rain Showers
Wednesday Night
50°F - Chance Rain Showers
Chance Rain Showers
Thursday
65°F - Chance Rain Showers
Chance Rain Showers
Thursday Night
51°F - Chance Rain Showers
Chance Rain Showers
Friday
67°F - Chance Rain Showers

Astronomical

Sunrise: 6:33 AM
Sun Transit: 12:43 AM
Sunset: 6:53 PM
Daylight: 12 hrs 20 mins
Moonrise: 2:28 PM
Moon Transit: 6:44 PM
Moonset: 11:01 PM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

8:14 AM - 10:44 AM
6:14 PM - 8:44 PM

Minor Periods

12:00 AM - 12:00 AM
1:58 PM - 3:28 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:33 AM
Sun Transit: 12:43 AM
Sunset: 6:53 PM
Daylight: 12 hrs 20 mins
Moonrise: 2:28 PM
Moon Transit: 6:44 PM
Moonset: 11:01 PM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

8:14 AM - 10:44 AM
6:14 PM - 8:44 PM

Minor Periods

12:00 AM - 12:00 AM
1:58 PM - 3:28 PM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:34 AM
Sun Transit: 12:43 AM
Sunset: 6:52 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:16 PM
Moon Transit: 7:35 PM
Moonset: 12:01 AM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

9:06 AM - 11:36 AM
7:05 PM - 9:35 PM

Minor Periods

2:46 PM - 4:16 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:34 AM
Sun Transit: 12:43 AM
Sunset: 6:52 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:16 PM
Moon Transit: 7:35 PM
Moonset: 12:01 AM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

9:06 AM - 11:36 AM
7:05 PM - 9:35 PM

Minor Periods

2:46 PM - 4:16 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:35 AM
Sun Transit: 12:42 AM
Sunset: 6:50 PM
Daylight: 12 hrs 15 mins
Moonrise: 3:56 PM
Moon Transit: 8:25 PM
Moonset: 12:58 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

9:56 AM - 12:26 AM
7:55 PM - 10:25 PM

Minor Periods

3:26 PM - 4:56 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:35 AM
Sun Transit: 12:42 AM
Sunset: 6:50 PM
Daylight: 12 hrs 15 mins
Moonrise: 3:56 PM
Moon Transit: 8:25 PM
Moonset: 12:58 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

9:56 AM - 12:26 AM
7:55 PM - 10:25 PM

Minor Periods

3:26 PM - 4:56 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:36 AM
Sun Transit: 12:42 AM
Sunset: 6:48 PM
Daylight: 12 hrs 12 mins
Moonrise: 4:29 PM
Moon Transit: 9:13 PM
Moonset: 1:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

10:45 AM - 1:15 PM
8:43 PM - 11:13 PM

Minor Periods

3:59 PM - 5:29 PM
12:30 AM - 2:00 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:36 AM
Sun Transit: 12:42 AM
Sunset: 6:48 PM
Daylight: 12 hrs 12 mins
Moonrise: 4:29 PM
Moon Transit: 9:13 PM
Moonset: 1:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

10:45 AM - 1:15 PM
8:43 PM - 11:13 PM

Minor Periods

3:59 PM - 5:29 PM
12:30 AM - 2:00 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:37 AM
Sun Transit: 12:42 AM
Sunset: 6:47 PM
Daylight: 12 hrs 9 mins
Moonrise: 4:57 PM
Moon Transit: 10:00 PM
Moonset: 2:05 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

11:32 AM - 2:02 PM
12:00 AM - 12:00 AM

Minor Periods

4:27 PM - 5:57 PM
1:35 AM - 3:05 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:37 AM
Sun Transit: 12:42 AM
Sunset: 6:47 PM
Daylight: 12 hrs 9 mins
Moonrise: 4:57 PM
Moon Transit: 10:00 PM
Moonset: 2:05 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

11:32 AM - 2:02 PM
12:00 AM - 12:00 AM

Minor Periods

4:27 PM - 5:57 PM
1:35 AM - 3:05 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:38 AM
Sun Transit: 12:41 AM
Sunset: 6:45 PM
Daylight: 12 hrs 7 mins
Moonrise: 5:22 PM
Moon Transit: 10:44 PM
Moonset: 3:10 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

12:17 AM - 2:47 PM
12:00 AM - 12:00 AM

Minor Periods

4:52 PM - 6:22 PM
2:40 AM - 4:10 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:38 AM
Sun Transit: 12:41 AM
Sunset: 6:45 PM
Daylight: 12 hrs 7 mins
Moonrise: 5:22 PM
Moon Transit: 10:44 PM
Moonset: 3:10 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

12:17 AM - 2:47 PM
12:00 AM - 12:00 AM

Minor Periods

4:52 PM - 6:22 PM
2:40 AM - 4:10 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:39 AM
Sun Transit: 12:41 AM
Sunset: 6:43 PM
Daylight: 12 hrs 4 mins
Moonrise: 5:44 PM
Moon Transit: 11:28 PM
Moonset: 4:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

1:02 PM - 3:32 PM
12:00 AM - 12:00 AM

Minor Periods

5:14 PM - 6:44 PM
3:47 AM - 5:17 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:39 AM
Sun Transit: 12:41 AM
Sunset: 6:43 PM
Daylight: 12 hrs 4 mins
Moonrise: 5:44 PM
Moon Transit: 11:28 PM
Moonset: 4:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

1:02 PM - 3:32 PM
12:00 AM - 12:00 AM

Minor Periods

5:14 PM - 6:44 PM
3:47 AM - 5:17 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


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: 6:40 AM
Sun Transit: 12:41 AM
Sunset: 6:42 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:05 PM
Moon Transit: 12:00 AM
Moonset: 5:24 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:35 PM - 7:05 PM
4:54 AM - 6:24 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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