Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

68.9°F

Measurement Time: Friday, June 5, 2026, 6:45 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

64°F
Clear
Clear
64°F
68.5°F
75%
WSW 4.7 mph
9.9 mph
68.2°F
52°F
0 in
0%
9 mi
1014 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 92°F
L: 58°F
Moderate rain
Sat
H: 88°F
L: 59°F
Patchy rain nearby
Sun
H: 76°F
L: 62°F
Sunny
Mon
H: 71°F
L: 55°F
Sunny
Tue
H: 74°F
L: 54°F

Air Quality

AQI: 1 - Good
PM2.5: 26.3 μg/m3
PM10: 31.3 μg/m3
Carbon Monoxide: 169 μg/m3
Nitrogen Dioxide: 4.7 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 161 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:47 AM
Sunset: 8:19 PM
Daylight: 15 hrs 3 mins
Moonrise: 12:53 AM
Moon Transit: 4:44 AM
Moonset: 9:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.0%

Best Times for Fishing or Hunting

Major Periods

4:14 AM - 6:44 AM
7:02 PM - 9:32 PM

Minor Periods

9:12 AM - 10:42 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Air Quality Alert issued June 5 at 3:42AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri June 5, 2026, 3:42 AM
Expires: Fri June 5, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Southern Fairfield, Southern New Haven, Southern Middlesex, Southern New London. from 11 AM to 11 PM EDT Friday. An Air Quality Action Day means that Ground Level Ozone within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued June 4 at 3:15PM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Thu June 4, 2026, 3:15 PM
Expires: Fri June 5, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Southern Fairfield, Southern New Haven, Southern Middlesex, Southern New London. from 11 AM to 11 PM EDT Friday. An Air Quality Action Day means that Ground Level Ozone within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued June 5 at 3:41PM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri June 5, 2026, 3:41 PM
Expires: Fri June 5, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Northern Fairfield, Northern New Haven, Northern Middlesex, Northern New London. from 11 AM to 11 PM EDT Saturday. An Air Quality Action Day means that Ground Level Ozone within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued June 5 at 3:41PM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri June 5, 2026, 3:41 PM
Expires: Fri June 5, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Southern Fairfield, Southern New Haven, Southern Middlesex, Southern New London. until 11 PM EDT this evening, and from 11 AM to 11 PM EDT Saturday. An Air Quality Action Day means that Ground Level Ozone within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued June 5 at 3:30PM EDT by NWS Boston/Norton MA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri June 5, 2026, 3:30 PM
Expires: Sat June 6, 2026, 3:30 PM

The Rhode Island Department of Environmental Management has issued an Air Quality Alert Day for Ground Level Ozone, from 11 AM to 11 PM EDT Saturday. An Air Quality Alert day means that Ground Level Ozone concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Rhode Island Department of Environmental Management website at: https://dem.ri.gov/


Friday, June 5, 2026

Weather Forecast

Sunny
92.1°F
57.7°F
74.3°F
48%
0 in
0%
0%
9.8 mph
8.8


Air Quality

AQI: 1 - Good
PM2.5: 13.57 μg/m3
PM10: 16.55 μg/m3
Carbon Monoxide: 157.67 μg/m3
Nitrogen Dioxide: 12.84 μg/m3
Sulphur Dioxide: 1.16 μg/m3
Ozone: 112.08 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:47 AM
Sunset: 8:19 PM
Daylight: 15 hrs 3 mins
Moonrise: 12:53 AM
Moon Transit: 4:44 AM
Moonset: 9:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.0%

Best Times for Fishing or Hunting

Major Periods

4:14 AM - 6:44 AM
7:02 PM - 9:32 PM

Minor Periods

9:12 AM - 10:42 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, June 6, 2026

Weather Forecast

Moderate rain
88.3°F
58.8°F
70°F
67%
0.27 in
73%
0%
16.3 mph
8.6


Air Quality

AQI: 2 - Moderate
PM2.5: 19.84 μg/m3
PM10: 24.55 μg/m3
Carbon Monoxide: 160.08 μg/m3
Nitrogen Dioxide: 6.56 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 135.38 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 12:48 AM
Sunset: 8:20 PM
Daylight: 15 hrs 4 mins
Moonrise: 12:20 AM
Moon Transit: 5:29 AM
Moonset: 10:48 AM
Moon Phase: Last Quarter
Moon Illumination: 53.9%

Best Times for Fishing or Hunting

Major Periods

4:59 AM - 7:29 AM
7:46 PM - 10:16 PM

Minor Periods

10:18 AM - 11:48 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Sunday, June 7, 2026

Weather Forecast

Patchy rain nearby
76.1°F
61.5°F
67.7°F
75%
0.13 in
73%
0%
16.3 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 3.55 μg/m3
PM10: 4.04 μg/m3
Carbon Monoxide: 137.38 μg/m3
Nitrogen Dioxide: 4.88 μg/m3
Sulphur Dioxide: 0.49 μg/m3
Ozone: 91.46 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:48 AM
Sunset: 8:21 PM
Daylight: 15 hrs 4 mins
Moonrise: 12:43 AM
Moon Transit: 6:12 AM
Moonset: 11:53 AM
Moon Phase: Last Quarter
Moon Illumination: 42.6%

Best Times for Fishing or Hunting

Major Periods

5:42 AM - 8:12 AM
8:30 PM - 11:00 PM

Minor Periods

11:23 AM - 12:53 AM
12:13 AM - 1:43 AM

Action Rating: 4 out of 5

Monday, June 8, 2026

Weather Forecast

Sunny
71°F
54.5°F
61.6°F
60%
0 in
1%
0%
15 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 3.84 μg/m3
PM10: 4.65 μg/m3
Carbon Monoxide: 123.21 μg/m3
Nitrogen Dioxide: 4.72 μg/m3
Sulphur Dioxide: 0.45 μg/m3
Ozone: 81.13 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:48 AM
Sunset: 8:21 PM
Daylight: 15 hrs 5 mins
Moonrise: 1:04 AM
Moon Transit: 6:56 AM
Moonset: 12:59 AM
Moon Phase: Last Quarter
Moon Illumination: 31.6%

Best Times for Fishing or Hunting

Major Periods

6:26 AM - 8:56 AM
9:13 PM - 11:43 PM

Minor Periods

12:29 AM - 1:59 PM
12:34 AM - 2:04 AM

Action Rating: 2 out of 5

Tuesday, June 9, 2026

Weather Forecast

Sunny
74.2°F
53.6°F
63.6°F
69%
0 in
1%
0%
10.7 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 7.53 μg/m3
PM10: 10.68 μg/m3
Carbon Monoxide: 122.01 μg/m3
Nitrogen Dioxide: 5.61 μg/m3
Sulphur Dioxide: 0.73 μg/m3
Ozone: 76 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 12:48 AM
Sunset: 8:22 PM
Daylight: 15 hrs 6 mins
Moonrise: 1:25 AM
Moon Transit: 6:27 AM
Moonset: 2:08 PM
Moon Phase: Last Quarter
Moon Illumination: 21.6%

Best Times for Fishing or Hunting

Major Periods

5:57 AM - 8:27 AM
5:57 AM - 8:27 AM

Minor Periods

1:38 PM - 3:08 PM
12:55 AM - 2:25 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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