Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

68.0°F

Measurement Time: Wednesday, September 23, 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

56°F
Partly Cloudy
Partly Cloudy
74%
NE 15 mph
48°F

Weather Forecast

Partly Cloudy
Tonight
49°F - Partly Cloudy
Mostly Sunny
Thursday
67°F - Mostly Sunny
Mostly Cloudy
Thursday Night
50°F - Mostly Cloudy
Chance Rain Showers
Friday
65°F - Chance Rain Showers
Rain Showers Likely
Friday Night
53°F - Rain Showers Likely
Rain Showers Likely
Saturday
64°F - Rain Showers Likely
Rain Showers Likely
Saturday Night
53°F - Rain Showers Likely
Rain Showers Likely
Sunday
65°F - Rain Showers Likely
Rain Showers Likely
Sunday Night
53°F - Rain Showers Likely
Slight Chance Rain Showers
Monday
67°F - Slight Chance Rain Showers
Mostly Cloudy
Monday Night
52°F - Mostly Cloudy
Mostly Sunny
Tuesday
69°F - Mostly Sunny
Partly Cloudy
Tuesday Night
54°F - Partly Cloudy
Mostly Sunny
Wednesday
71°F - Mostly Sunny

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

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

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: 6:41 AM
Sun Transit: 12:40 AM
Sunset: 6:40 PM
Daylight: 11 hrs 59 mins
Moonrise: 6:28 PM
Moon Transit: 8:33 AM
Moonset: 6:32 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

8:03 AM - 10:33 AM
8:03 AM - 10:33 AM

Minor Periods

5:58 PM - 7:28 PM
6:02 AM - 7:32 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: 6:41 AM
Sun Transit: 12:40 AM
Sunset: 6:40 PM
Daylight: 11 hrs 59 mins
Moonrise: 6:28 PM
Moon Transit: 8:33 AM
Moonset: 6:32 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

8:03 AM - 10:33 AM
8:03 AM - 10:33 AM

Minor Periods

5:58 PM - 7:28 PM
6:02 AM - 7:32 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: 6:42 AM
Sun Transit: 12:40 AM
Sunset: 6:38 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:51 PM
Moon Transit: 12:00 AM
Moonset: 7:43 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:18 PM - 5:48 PM

Minor Periods

6:21 PM - 7:51 PM
7:13 AM - 8:43 AM

Action Rating: 4 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: 6:42 AM
Sun Transit: 12:40 AM
Sunset: 6:38 PM
Daylight: 11 hrs 56 mins
Moonrise: 6:51 PM
Moon Transit: 12:00 AM
Moonset: 7:43 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:18 PM - 5:48 PM

Minor Periods

6:21 PM - 7:51 PM
7:13 AM - 8:43 AM

Action Rating: 4 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: 6:43 AM
Sun Transit: 12:39 AM
Sunset: 6:36 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:19 PM
Moon Transit: 1:46 AM
Moonset: 8:56 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:16 AM - 3:46 AM
4:08 PM - 6:38 PM

Minor Periods

6:49 PM - 8:19 PM
8:26 AM - 9:56 AM

Action Rating: 5 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: 6:43 AM
Sun Transit: 12:39 AM
Sunset: 6:36 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:19 PM
Moon Transit: 1:46 AM
Moonset: 8:56 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:16 AM - 3:46 AM
4:08 PM - 6:38 PM

Minor Periods

6:49 PM - 8:19 PM
8:26 AM - 9:56 AM

Action Rating: 5 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: 6:44 AM
Sun Transit: 12:39 AM
Sunset: 6:35 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:52 PM
Moon Transit: 2:38 AM
Moonset: 10:12 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:08 AM - 4:38 AM
5:02 PM - 7:32 PM

Minor Periods

7:22 PM - 8:52 PM
9:42 AM - 11:12 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: 6:44 AM
Sun Transit: 12:39 AM
Sunset: 6:35 PM
Daylight: 11 hrs 50 mins
Moonrise: 7:52 PM
Moon Transit: 2:38 AM
Moonset: 10:12 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:08 AM - 4:38 AM
5:02 PM - 7:32 PM

Minor Periods

7:22 PM - 8:52 PM
9:42 AM - 11:12 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: 6:45 AM
Sun Transit: 12:39 AM
Sunset: 6:33 PM
Daylight: 11 hrs 48 mins
Moonrise: 8:34 PM
Moon Transit: 3:34 AM
Moonset: 11:29 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:04 AM - 5:34 AM
6:01 PM - 8:31 PM

Minor Periods

8:04 PM - 9:34 PM
10:59 AM - 12:29 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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