Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

77.4°F

Measurement Time: Wednesday, August 26, 2026, 2:45 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

76°F

Conditions: Mostly Clear

Humidity: 74%

Wind: SW 3 mph

Dew Point: 67°F

Weather Forecast

Tonight
66°F - Mostly Cloudy

Thursday
81°F - Mostly Sunny then Slight Chance Rain Showers

Thursday Night
68°F - Showers And Thunderstorms Likely

Friday
83°F - Slight Chance Showers And Thunderstorms

Friday Night
61°F - Slight Chance Rain Showers then Partly Cloudy

Saturday
79°F - Sunny

Saturday Night
62°F - Mostly Clear

Sunday
81°F - Sunny

Sunday Night
67°F - Slight Chance Rain Showers

Monday
82°F - Mostly Sunny

Monday Night
67°F - Partly Cloudy then Slight Chance Rain Showers

Tuesday
81°F - Chance Rain Showers

Tuesday Night
67°F - Chance Rain Showers

Wednesday
80°F - Chance Rain Showers

Astronomical

Sunrise: 6:10 AM
Sun Transit: 12:51 AM
Sunset: 7:32 PM
Daylight: 13 hrs 22 mins

Moonrise: 6:56 PM
Moon Transit: 12:00 AM
Moonset: 4:20 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:39 PM - 4:09 PM

Minor Periods

6:26 PM - 7:56 PM
3:50 AM - 5:20 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:10 AM
Sun Transit: 12:51 AM
Sunset: 7:32 PM
Daylight: 13 hrs 22 mins

Moonrise: 6:56 PM
Moon Transit: 12:00 AM
Moonset: 4:20 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:39 PM - 4:09 PM

Minor Periods

6:26 PM - 7:56 PM
3:50 AM - 5:20 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:11 AM
Sun Transit: 12:50 AM
Sunset: 7:30 PM
Daylight: 13 hrs 19 mins

Moonrise: 7:19 PM
Moon Transit: 12:06 AM
Moonset: 5:26 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:24 PM - 4:54 PM

Minor Periods

6:49 PM - 8:19 PM
4:56 AM - 6:26 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:11 AM
Sun Transit: 12:50 AM
Sunset: 7:30 PM
Daylight: 13 hrs 19 mins

Moonrise: 7:19 PM
Moon Transit: 12:06 AM
Moonset: 5:26 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:24 PM - 4:54 PM

Minor Periods

6:49 PM - 8:19 PM
4:56 AM - 6:26 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:12 AM
Sun Transit: 12:50 AM
Sunset: 7:28 PM
Daylight: 13 hrs 16 mins

Moonrise: 7:41 PM
Moon Transit: 12:50 AM
Moonset: 6:33 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:20 AM - 2:50 AM
3:08 PM - 5:38 PM

Minor Periods

7:11 PM - 8:41 PM
6:03 AM - 7:33 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:12 AM
Sun Transit: 12:50 AM
Sunset: 7:28 PM
Daylight: 13 hrs 16 mins

Moonrise: 7:41 PM
Moon Transit: 12:50 AM
Moonset: 6:33 AM
Moon Phase: Full
Moon Illumination: 98.7%

Best Times for Fishing or Hunting

Major Periods

12:20 AM - 2:50 AM
3:08 PM - 5:38 PM

Minor Periods

7:11 PM - 8:41 PM
6:03 AM - 7:33 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:13 AM
Sun Transit: 12:50 AM
Sunset: 7:27 PM
Daylight: 13 hrs 14 mins

Moonrise: 8:02 PM
Moon Transit: 1:34 AM
Moonset: 7:39 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:04 AM - 3:34 AM
12:00 AM - 12:00 AM

Minor Periods

7:32 PM - 9:02 PM
7:09 AM - 8:39 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:13 AM
Sun Transit: 12:50 AM
Sunset: 7:27 PM
Daylight: 13 hrs 14 mins

Moonrise: 8:02 PM
Moon Transit: 1:34 AM
Moonset: 7:39 AM
Moon Phase: Full
Moon Illumination: 95.0%

Best Times for Fishing or Hunting

Major Periods

1:04 AM - 3:34 AM
12:00 AM - 12:00 AM

Minor Periods

7:32 PM - 9:02 PM
7:09 AM - 8:39 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:14 AM
Sun Transit: 12:49 AM
Sunset: 7:25 PM
Daylight: 13 hrs 11 mins

Moonrise: 8:24 PM
Moon Transit: 12:49 AM
Moonset: 8:48 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
12:19 AM - 2:49 AM

Minor Periods

7:54 PM - 9:24 PM
8:18 AM - 9:48 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:14 AM
Sun Transit: 12:49 AM
Sunset: 7:25 PM
Daylight: 13 hrs 11 mins

Moonrise: 8:24 PM
Moon Transit: 12:49 AM
Moonset: 8:48 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.9%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
12:19 AM - 2:49 AM

Minor Periods

7:54 PM - 9:24 PM
8:18 AM - 9:48 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:15 AM
Sun Transit: 12:49 AM
Sunset: 7:24 PM
Daylight: 13 hrs 9 mins

Moonrise: 8:48 PM
Moon Transit: 3:03 AM
Moonset: 9:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:33 AM - 5:03 AM
5:23 PM - 7:53 PM

Minor Periods

8:18 PM - 9:48 PM
9:27 AM - 10:57 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:15 AM
Sun Transit: 12:49 AM
Sunset: 7:24 PM
Daylight: 13 hrs 9 mins

Moonrise: 8:48 PM
Moon Transit: 3:03 AM
Moonset: 9:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

2:33 AM - 5:03 AM
5:23 PM - 7:53 PM

Minor Periods

8:18 PM - 9:48 PM
9:27 AM - 10:57 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:16 AM
Sun Transit: 12:49 AM
Sunset: 7:22 PM
Daylight: 13 hrs 6 mins

Moonrise: 9:16 PM
Moon Transit: 3:52 AM
Moonset: 11:10 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:22 AM - 5:52 AM
6:13 PM - 8:43 PM

Minor Periods

8:46 PM - 10:16 PM
10:40 AM - 12:10 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:16 AM
Sun Transit: 12:49 AM
Sunset: 7:22 PM
Daylight: 13 hrs 6 mins

Moonrise: 9:16 PM
Moon Transit: 3:52 AM
Moonset: 11:10 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:22 AM - 5:52 AM
6:13 PM - 8:43 PM

Minor Periods

8:46 PM - 10:16 PM
10:40 AM - 12:10 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

Conditions:

High Temperature: °F

Low Temperature: °F

Average Temperature: °F

Average Humidity: %

Precipitation: in

Chance of Rain: %

Chance of Snow: %

Maximum Wind: mph

UV Index:

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: 6:17 AM
Sun Transit: 12:49 AM
Sunset: 7:20 PM
Daylight: 13 hrs 3 mins

Moonrise: 9:51 PM
Moon Transit: 4:43 AM
Moonset: 12:25 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:13 AM - 6:43 AM
7:08 PM - 9:38 PM

Minor Periods

9:21 PM - 10:51 PM
11:55 AM - 1:25 PM

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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