Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

76.6°F

Measurement Time: Tuesday, August 4, 2026, 7:45 AM EDT

Temperature Locations

View Nearby Locations     View All Connecticut Locations     View Locations Near Me

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

82.8°F
Sunny
Sunny
86.7°F
87.1°F
65%
WSW 4.3 mph
5.5 mph
82.8°F
69.8°F
0 in
1%
6 mi
1019 mbar
6.7

Five Day Weather Forecast

Sunny
Tue
H: 85°F
L: 63°F
Partly Cloudy
Wed
H: 80°F
L: 64°F
Partly Cloudy
Thu
H: 83°F
L: 71°F
Sunny
Fri
H: 85°F
L: 71°F
Sunny
Sat
H: 83°F
L: 71°F

Air Quality

AQI: 1 - Good
PM2.5: 11.6 μg/m3
PM10: 11.8 μg/m3
Carbon Monoxide: 123 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 113 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 12:55 AM
Sunset: 8:03 PM
Daylight: 14 hrs 15 mins
Moonrise: 10:43 PM
Moon Transit: 5:05 AM
Moonset: 12:06 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

4:35 AM - 7:05 AM
7:25 PM - 9:55 PM

Minor Periods

10:13 PM - 11:43 PM
11:36 AM - 1:06 PM

Action Rating: 2 out of 5

Small Craft Advisory issued August 3 at 8:28PM EDT until August 4 at 11:00AM EDT by NWS Upton NY

Effective: Mon August 3, 2026, 8:28 PM
Expires: Tue August 4, 2026, 9:30 AM

* WHAT...North winds 5 to 15 kt with gusts up to 25 kt and seas 5 to 8 feet. * WHERE...Fire Island Inlet NY to Montauk Point NY out 20 nm. * WHEN...Until 11 AM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued August 4 at 3:05AM EDT until August 4 at 2:00PM EDT by NWS Upton NY

Effective: Tue August 4, 2026, 3:05 AM
Expires: Tue August 4, 2026, 2:00 PM

* WHAT...Seas 4 to 6 ft. * WHERE...Moriches Inlet NY to Montauk Point NY out 20 NM. * WHEN...Until 2 PM EDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Tuesday, August 4, 2026

Weather Forecast

Sunny
84.7°F
63°F
72.6°F
77%
0 in
8%
0%
8.5 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 9.33 μg/m3
PM10: 9.75 μg/m3
Carbon Monoxide: 137.92 μg/m3
Nitrogen Dioxide: 5.17 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 91.33 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 12:55 AM
Sunset: 8:03 PM
Daylight: 14 hrs 15 mins
Moonrise: 10:43 PM
Moon Transit: 5:05 AM
Moonset: 12:06 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

4:35 AM - 7:05 AM
7:25 PM - 9:55 PM

Minor Periods

10:13 PM - 11:43 PM
11:36 AM - 1:06 PM

Action Rating: 2 out of 5

Wednesday, August 5, 2026

Weather Forecast

Partly Cloudy
80.2°F
63.7°F
72.3°F
70%
0 in
8%
0%
8.9 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 10.78 μg/m3
PM10: 12.46 μg/m3
Carbon Monoxide: 154.96 μg/m3
Nitrogen Dioxide: 10.19 μg/m3
Sulphur Dioxide: 1.01 μg/m3
Ozone: 70.33 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 12:55 AM
Sunset: 8:02 PM
Daylight: 14 hrs 13 mins
Moonrise: 11:13 PM
Moon Transit: 5:54 AM
Moonset: 1:19 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

5:24 AM - 7:54 AM
8:16 PM - 10:46 PM

Minor Periods

12:00 AM - 12:00 AM
12:49 AM - 2:19 PM

Action Rating: 4 out of 5

Thursday, August 6, 2026

Weather Forecast

Partly Cloudy
83.2°F
71.2°F
75.9°F
87%
0.08 in
70%
0%
11.2 mph
9.1


Air Quality

AQI: 1 - Good
PM2.5: 6.5 μg/m3
PM10: 9.45 μg/m3
Carbon Monoxide: 114.17 μg/m3
Nitrogen Dioxide: 3.83 μg/m3
Sulphur Dioxide: 0.63 μg/m3
Ozone: 69 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 12:55 AM
Sunset: 8:00 PM
Daylight: 14 hrs 11 mins
Moonrise: 12:13 AM
Moon Transit: 6:47 AM
Moonset: 2:35 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

6:17 AM - 8:47 AM
9:13 PM - 11:43 PM

Minor Periods

2:05 PM - 3:35 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, August 7, 2026

Weather Forecast

Sunny
85.4°F
71.4°F
77.5°F
80%
0 in
12%
0%
11 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 9.87 μg/m3
PM10: 11.34 μg/m3
Carbon Monoxide: 173.7 μg/m3
Nitrogen Dioxide: 8.94 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 110.46 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 12:55 AM
Sunset: 7:59 PM
Daylight: 14 hrs 9 mins
Moonrise: 12:51 AM
Moon Transit: 7:46 AM
Moonset: 3:50 PM
Moon Phase: Last Quarter
Moon Illumination: 22.2%

Best Times for Fishing or Hunting

Major Periods

7:16 AM - 9:46 AM
12:00 AM - 12:00 AM

Minor Periods

3:20 PM - 4:50 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, August 8, 2026

Weather Forecast

Sunny
83.2°F
71°F
76.4°F
80%
0.08 in
60%
0%
9.4 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 12.48 μg/m3
PM10: 13.11 μg/m3
Carbon Monoxide: 299.56 μg/m3
Nitrogen Dioxide: 11.81 μg/m3
Sulphur Dioxide: 1.96 μg/m3
Ozone: 86.78 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 12:55 AM
Sunset: 7:58 PM
Daylight: 14 hrs 6 mins
Moonrise: 12:40 AM
Moon Transit: 8:48 AM
Moonset: 5:01 PM
Moon Phase: Waning Crescent
Moon Illumination: 13.6%

Best Times for Fishing or Hunting

Major Periods

8:18 AM - 10:48 AM
12:00 AM - 12:00 AM

Minor Periods

4:31 PM - 6:01 PM
12:10 AM - 1:40 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.

Webcams Near Old Lyme, CT

Sponsored Content