Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

76.6°F

Measurement Time: Monday, June 15, 2026, 3:45 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

70°F
Partly cloudy
Partly cloudy
70°F
75.3°F
93%
NW 11.6 mph
17.7 mph
71.2°F
62.8°F
0 in
75%
9 mi
1002 mbar
0.7

Five Day Weather Forecast

Moderate rain
Mon
H: 86°F
L: 63°F
Sunny
Tue
H: 71°F
L: 53°F
Patchy rain nearby
Wed
H: 69°F
L: 60°F
Patchy rain nearby
Thu
H: 78°F
L: 63°F
Moderate rain
Fri
H: 68°F
L: 60°F

Air Quality

AQI: 1 - Good
PM2.5: 3.9 μg/m3
PM10: 4.2 μg/m3
Carbon Monoxide: 122 μg/m3
Nitrogen Dioxide: 4 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 93 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 12:49 AM
Sunset: 8:25 PM
Daylight: 15 hrs 9 mins
Moonrise: 5:15 AM
Moon Transit: 1:28 PM
Moonset: 9:36 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

2:52 AM - 5:22 AM
12:58 AM - 3:28 PM

Minor Periods

9:06 PM - 10:36 PM
4:45 AM - 6:15 AM

Action Rating: 4 out of 5

Small Craft Advisory issued June 15 at 3:01AM EDT until June 15 at 6:00AM EDT by NWS Upton NY

Effective: Mon June 15, 2026, 3:01 AM
Expires: Mon June 15, 2026, 6:00 AM

* WHAT...Southwest winds 10 to 15 kt with gusts up to 25 kt, becoming NW. Seas 3 to 5 feet. * WHERE...Fire Island Inlet NY to Montauk Point NY out 20 nm. * WHEN...Until 6 AM EDT early this morning. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Monday, June 15, 2026

Weather Forecast

Moderate rain
86.4°F
62.6°F
73.2°F
65%
0.26 in
62%
0%
13 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 3.66 μg/m3
PM10: 4.46 μg/m3
Carbon Monoxide: 118.29 μg/m3
Nitrogen Dioxide: 2.52 μg/m3
Sulphur Dioxide: 0.36 μg/m3
Ozone: 90.42 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 12:49 AM
Sunset: 8:25 PM
Daylight: 15 hrs 9 mins
Moonrise: 5:15 AM
Moon Transit: 1:28 PM
Moonset: 9:36 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

2:52 AM - 5:22 AM
12:58 AM - 3:28 PM

Minor Periods

9:06 PM - 10:36 PM
4:45 AM - 6:15 AM

Action Rating: 4 out of 5

Tuesday, June 16, 2026

Weather Forecast

Sunny
71°F
53.4°F
63.5°F
58%
0 in
3%
0%
11.9 mph
8.2


Air Quality

AQI: 1 - Good
PM2.5: 5.49 μg/m3
PM10: 6.95 μg/m3
Carbon Monoxide: 117.58 μg/m3
Nitrogen Dioxide: 3.52 μg/m3
Sulphur Dioxide: 0.53 μg/m3
Ozone: 75.38 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 12:50 AM
Sunset: 8:25 PM
Daylight: 15 hrs 10 mins
Moonrise: 6:31 AM
Moon Transit: 2:33 PM
Moonset: 10:27 PM
Moon Phase: New
Moon Illumination: 1.0%

Best Times for Fishing or Hunting

Major Periods

3:59 AM - 6:29 AM
2:03 PM - 4:33 PM

Minor Periods

9:57 PM - 11:27 PM
6:01 AM - 7:31 AM

Action Rating: 3 out of 5

Wednesday, June 17, 2026

Weather Forecast

Patchy rain nearby
69.3°F
60.1°F
64.8°F
79%
0.01 in
36%
0%
12.1 mph
7.5


Air Quality

AQI: 1 - Good
PM2.5: 10.68 μg/m3
PM10: 15.25 μg/m3
Carbon Monoxide: 124.54 μg/m3
Nitrogen Dioxide: 4.04 μg/m3
Sulphur Dioxide: 0.65 μg/m3
Ozone: 88.54 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:50 AM
Sunset: 8:25 PM
Daylight: 15 hrs 10 mins
Moonrise: 7:50 AM
Moon Transit: 3:34 PM
Moonset: 11:05 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%

Best Times for Fishing or Hunting

Major Periods

5:02 AM - 7:32 AM
3:04 PM - 5:34 PM

Minor Periods

12:00 AM - 12:00 AM
7:20 AM - 8:50 AM

Action Rating: 3 out of 5

Thursday, June 18, 2026

Weather Forecast

Patchy rain nearby
78.2°F
63°F
69.3°F
88%
0.08 in
74%
0%
19.2 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 11.48 μg/m3
PM10: 16.44 μg/m3
Carbon Monoxide: 125.45 μg/m3
Nitrogen Dioxide: 2.85 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 104.67 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:50 AM
Sunset: 8:26 PM
Daylight: 15 hrs 10 mins
Moonrise: 9:10 AM
Moon Transit: 4:29 PM
Moonset: 12:05 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

5:59 AM - 8:29 AM
3:59 PM - 6:29 PM

Minor Periods

8:40 AM - 10:10 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, June 19, 2026

Weather Forecast

Moderate rain
67.7°F
60.3°F
66.5°F
92%
0.21 in
84%
0%
17.7 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 2.92 μg/m3
PM10: 3.18 μg/m3
Carbon Monoxide: 149.44 μg/m3
Nitrogen Dioxide: 3.27 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 88.33 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:50 AM
Sunset: 8:26 PM
Daylight: 15 hrs 10 mins
Moonrise: 10:25 AM
Moon Transit: 5:19 PM
Moonset: 12:36 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

6:51 AM - 9:21 AM
4:49 PM - 7:19 PM

Minor Periods

9:55 AM - 11:25 AM
12:00 AM - 12:00 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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