Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

74.8°F

Measurement Time: Thursday, September 3, 2026, 8:45 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

69°F
Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
97%
W 1 mph
68°F

Weather Forecast

Chance Showers And Thunderstorms
Overnight
67°F - Chance Showers And Thunderstorms
Slight Chance Rain Showers then Mostly Sunny
Friday
82°F - Slight Chance Rain Showers then Mostly Sunny
Mostly Clear
Friday Night
62°F - Mostly Clear
Mostly Sunny then Chance Rain Showers
Saturday
77°F - Mostly Sunny then Chance Rain Showers
Chance Rain Showers
Saturday Night
59°F - Chance Rain Showers
Mostly Sunny
Sunday
72°F - Mostly Sunny
Mostly Clear
Sunday Night
55°F - Mostly Clear
Sunny
Labor Day
76°F - Sunny
Mostly Clear
Monday Night
58°F - Mostly Clear
Sunny
Tuesday
78°F - Sunny
Partly Cloudy
Tuesday Night
59°F - Partly Cloudy
Partly Sunny
Wednesday
76°F - Partly Sunny
Chance Rain Showers
Wednesday Night
65°F - Chance Rain Showers
Chance Rain Showers
Thursday
80°F - Chance Rain Showers

Astronomical

Sunrise: 6:19 AM
Sun Transit: 12:48 AM
Sunset: 7:17 PM
Daylight: 12 hrs 58 mins
Moonrise: 11:31 PM
Moon Transit: 6:40 AM
Moonset: 2:51 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:10 AM - 8:40 AM
9:09 PM - 11:39 PM

Minor Periods

12:00 AM - 12:00 AM
2:21 PM - 3:51 PM

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: 6:19 AM
Sun Transit: 12:48 AM
Sunset: 7:17 PM
Daylight: 12 hrs 58 mins
Moonrise: 11:31 PM
Moon Transit: 6:40 AM
Moonset: 2:51 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:10 AM - 8:40 AM
9:09 PM - 11:39 PM

Minor Periods

12:00 AM - 12:00 AM
2:21 PM - 3:51 PM

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: 6:19 AM
Sun Transit: 12:48 AM
Sunset: 7:17 PM
Daylight: 12 hrs 58 mins
Moonrise: 11:31 PM
Moon Transit: 6:40 AM
Moonset: 2:51 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:10 AM - 8:40 AM
9:09 PM - 11:39 PM

Minor Periods

12:00 AM - 12:00 AM
2:21 PM - 3:51 PM

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: 6:19 AM
Sun Transit: 12:48 AM
Sunset: 7:17 PM
Daylight: 12 hrs 58 mins
Moonrise: 11:31 PM
Moon Transit: 6:40 AM
Moonset: 2:51 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:10 AM - 8:40 AM
9:09 PM - 11:39 PM

Minor Periods

12:00 AM - 12:00 AM
2:21 PM - 3:51 PM

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: 6:20 AM
Sun Transit: 12:48 AM
Sunset: 7:15 PM
Daylight: 12 hrs 55 mins
Moonrise: 12:31 AM
Moon Transit: 7:43 AM
Moonset: 3:53 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:13 AM - 9:43 AM
12:00 AM - 12:00 AM

Minor Periods

3:23 PM - 4:53 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: 6:20 AM
Sun Transit: 12:48 AM
Sunset: 7:15 PM
Daylight: 12 hrs 55 mins
Moonrise: 12:31 AM
Moon Transit: 7:43 AM
Moonset: 3:53 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:13 AM - 9:43 AM
12:00 AM - 12:00 AM

Minor Periods

3:23 PM - 4:53 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: 6:21 AM
Sun Transit: 12:47 AM
Sunset: 7:14 PM
Daylight: 12 hrs 53 mins
Moonrise: 12:39 AM
Moon Transit: 8:45 AM
Moonset: 4:45 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:15 AM - 10:45 AM
12:00 AM - 12:00 AM

Minor Periods

4:15 PM - 5:45 PM
12:09 AM - 1:39 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: 6:21 AM
Sun Transit: 12:47 AM
Sunset: 7:14 PM
Daylight: 12 hrs 53 mins
Moonrise: 12:39 AM
Moon Transit: 8:45 AM
Moonset: 4:45 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:15 AM - 10:45 AM
12:00 AM - 12:00 AM

Minor Periods

4:15 PM - 5:45 PM
12:09 AM - 1:39 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: 6:22 AM
Sun Transit: 12:47 AM
Sunset: 7:12 PM
Daylight: 12 hrs 50 mins
Moonrise: 1:54 AM
Moon Transit: 9:46 AM
Moonset: 5:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:16 AM - 11:46 AM

Minor Periods

4:56 PM - 6:26 PM
1:24 AM - 2:54 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: 6:22 AM
Sun Transit: 12:47 AM
Sunset: 7:12 PM
Daylight: 12 hrs 50 mins
Moonrise: 1:54 AM
Moon Transit: 9:46 AM
Moonset: 5:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:16 AM - 11:46 AM

Minor Periods

4:56 PM - 6:26 PM
1:24 AM - 2:54 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: 6:23 AM
Sun Transit: 12:47 AM
Sunset: 7:10 PM
Daylight: 12 hrs 47 mins
Moonrise: 3:12 AM
Moon Transit: 10:42 AM
Moonset: 5:58 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.4%

Best Times for Fishing or Hunting

Major Periods

12:11 AM - 2:41 AM
10:12 AM - 12:42 AM

Minor Periods

5:28 PM - 6:58 PM
2:42 AM - 4:12 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: 6:23 AM
Sun Transit: 12:47 AM
Sunset: 7:10 PM
Daylight: 12 hrs 47 mins
Moonrise: 3:12 AM
Moon Transit: 10:42 AM
Moonset: 5:58 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.4%

Best Times for Fishing or Hunting

Major Periods

12:11 AM - 2:41 AM
10:12 AM - 12:42 AM

Minor Periods

5:28 PM - 6:58 PM
2:42 AM - 4:12 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: 6:24 AM
Sun Transit: 12:46 AM
Sunset: 7:09 PM
Daylight: 12 hrs 45 mins
Moonrise: 4:29 AM
Moon Transit: 11:34 AM
Moonset: 6:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

1:04 AM - 3:34 AM
11:04 AM - 1:34 PM

Minor Periods

5:56 PM - 7:26 PM
3:59 AM - 5:29 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: 6:24 AM
Sun Transit: 12:46 AM
Sunset: 7:09 PM
Daylight: 12 hrs 45 mins
Moonrise: 4:29 AM
Moon Transit: 11:34 AM
Moonset: 6:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

1:04 AM - 3:34 AM
11:04 AM - 1:34 PM

Minor Periods

5:56 PM - 7:26 PM
3:59 AM - 5:29 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: 6:25 AM
Sun Transit: 12:46 AM
Sunset: 7:07 PM
Daylight: 12 hrs 42 mins
Moonrise: 5:43 AM
Moon Transit: 12:22 AM
Moonset: 6:49 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:54 AM - 4:24 AM
11:52 AM - 2:22 PM

Minor Periods

6:19 PM - 7:49 PM
5:13 AM - 6:43 AM

Action Rating: 4 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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