Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

56.5°F

Measurement Time: Monday, May 4, 2026, 6:45 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

60.1°F
Sunny
Sunny
60.1°F
65.8°F
49%
WSW 16.1 mph
22.2 mph
65.4°F
37.1°F
0 in
0%
6 mi
1014 mbar
5.1

Five Day Weather Forecast

Sunny
Mon
H: 73°F
L: 40°F
Sunny
Tue
H: 64°F
L: 49°F
Moderate rain
Wed
H: 59°F
L: 54°F
Patchy rain nearby
Thu
H: 59°F
L: 50°F
Patchy rain nearby
Fri
H: 59°F
L: 43°F

Air Quality

AQI: 1 - Good
PM2.5: 8.65 μg/m3
PM10: 11.35 μg/m3
Carbon Monoxide: 154.85 μg/m3
Nitrogen Dioxide: 5.15 μg/m3
Sulphur Dioxide: 2.55 μg/m3
Ozone: 130 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:46 AM
Sunset: 7:50 PM
Daylight: 14 hrs 7 mins
Moonrise: 11:14 PM
Moon Transit: 2:39 AM
Moonset: 6:59 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%

Best Times for Fishing or Hunting

Major Periods

2:09 AM - 4:39 AM
5:01 PM - 7:31 PM

Minor Periods

12:00 AM - 12:00 AM
6:29 AM - 7:59 AM

Action Rating: 3 out of 5

Special Weather Statement issued May 3 at 1:31PM EDT by NWS Upton NY

Effective: Sun May 3, 2026, 1:31 PM
Expires: Mon May 4, 2026, 8:00 PM

The combination of drying fine fuels, southwest wind gusts between 25 and 30 mph, and relative humidity values between 25 and 35 percent will contribute to an elevated risk of fire spread for southern Connecticut Late Monday morning into early Monday evening. This forecast considers meteorological, fuel, and land conditions and has been developed in coordination with state fire and land management officials.


Special Weather Statement issued May 3 at 10:02PM EDT by NWS Upton NY

Effective: Sun May 3, 2026, 10:02 PM
Expires: Mon May 4, 2026, 10:00 PM

The combination of drying fine fuels, southwest wind gusts between 25 and 30 mph, and relative humidity values between 25 and 35 percent will contribute to an elevated risk of fire spread for southern Connecticut Late Monday morning into early Monday evening. This forecast considers meteorological, fuel, and land conditions and has been developed in coordination with state fire and land management officials.


Special Weather Statement issued May 4 at 6:08AM EDT by NWS Boston/Norton MA

Effective: Mon May 4, 2026, 6:08 AM
Expires: Mon May 4, 2026, 7:00 PM

..ELEVATED FIRE WEATHER POTENTIAL TODAY IN SOUTHERN NEW ENGLAND... The combination of southwest winds gusting to 30 to 35 mph, relative humidity as low as 25 to 35 percent, and a lack of significant rainfall over the past few days will lead to an elevated fire weather potential today.


Special Weather Statement issued May 3 at 1:31PM EDT by NWS Upton NY

Effective: Sun May 3, 2026, 1:31 PM
Expires: Mon May 4, 2026, 8:00 PM

Through this evening, the combination of drying fine fuels, northwest wind gusts between 25 and 35 mph, and relative humidity values between 20 and 30 percent will contribute to an elevated risk of fire spread for the Lower Hudson Valley, New York City and Long Island. Late Monday morning into early Monday evening, the combination of drying fine fuels, southwest wind gusts between 25 and 30 mph, and relative humidity values between 25 and 35 percent will contribute to an elevated risk of fire spread for the Lower Hudson Valley, New York City and northern and western portions of Long Island. This forecast considers meteorological, fuel, and land conditions and has been developed in coordination with state fire and land management officials. As a reminder, the annual statewide burn ban remains in effect until May 14. No burn permits are issued. Use extra caution if handling any potential ignition sources such as machinery or matches and ensure to properly extinguish or dispose of cigarette butts. Please refer to the New York State Department of Environmental Conservation website for more information on burn restrictions.


Special Weather Statement issued May 3 at 10:02PM EDT by NWS Upton NY

Effective: Sun May 3, 2026, 10:02 PM
Expires: Mon May 4, 2026, 10:00 PM

Late Monday morning into early Monday evening, the combination of drying fine fuels, southwest wind gusts between 25 and 30 mph, and relative humidity values between 25 and 35 percent will contribute to an elevated risk of fire spread for the Lower Hudson Valley, New York City and northern and western portions of Long Island. This forecast considers meteorological, fuel, and land conditions and has been developed in coordination with state fire and land management officials. As a reminder, the annual statewide burn ban remains in effect until May 14. No burn permits are issued. Use extra caution if handling any potential ignition sources such as machinery or matches and ensure to properly extinguish or dispose of cigarette butts. Please refer to the New York State Department of Environmental Conservation website for more information on burn restrictions.


Monday, May 4, 2026

Weather Forecast

Sunny
72.7°F
40.1°F
55.9°F
53%
0 in
0%
0%
17.9 mph
6.5


Air Quality

AQI: 1 - Good
PM2.5: 7.39 μg/m3
PM10: 8.66 μg/m3
Carbon Monoxide: 182.37 μg/m3
Nitrogen Dioxide: 9.92 μg/m3
Sulphur Dioxide: 3.74 μg/m3
Ozone: 95 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:46 AM
Sunset: 7:50 PM
Daylight: 14 hrs 7 mins
Moonrise: 11:14 PM
Moon Transit: 2:39 AM
Moonset: 6:59 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%

Best Times for Fishing or Hunting

Major Periods

2:09 AM - 4:39 AM
5:01 PM - 7:31 PM

Minor Periods

12:00 AM - 12:00 AM
6:29 AM - 7:59 AM

Action Rating: 3 out of 5

Tuesday, May 5, 2026

Weather Forecast

Sunny
64.2°F
49.1°F
56.7°F
77%
0 in
0%
0%
21.5 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 9.54 μg/m3
PM10: 13.1 μg/m3
Carbon Monoxide: 158.05 μg/m3
Nitrogen Dioxide: 3.75 μg/m3
Sulphur Dioxide: 1.73 μg/m3
Ozone: 124.44 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 12:46 AM
Sunset: 7:51 PM
Daylight: 14 hrs 10 mins
Moonrise: 12:14 AM
Moon Transit: 3:30 AM
Moonset: 7:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.8%

Best Times for Fishing or Hunting

Major Periods

3:00 AM - 5:30 AM
5:52 PM - 8:22 PM

Minor Periods

7:17 AM - 8:47 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, May 6, 2026

Weather Forecast

Moderate rain
58.6°F
53.8°F
55.3°F
90%
0.58 in
87%
0%
19.5 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 10.29 μg/m3
PM10: 15.06 μg/m3
Carbon Monoxide: 138.45 μg/m3
Nitrogen Dioxide: 3.22 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 114.64 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 12:46 AM
Sunset: 7:52 PM
Daylight: 14 hrs 12 mins
Moonrise: 12:05 AM
Moon Transit: 4:22 AM
Moonset: 8:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.0%

Best Times for Fishing or Hunting

Major Periods

3:52 AM - 6:22 AM
6:43 PM - 9:13 PM

Minor Periods

8:12 AM - 9:42 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, May 7, 2026

Weather Forecast

Patchy rain nearby
58.9°F
50.4°F
53.1°F
88%
0.17 in
89%
0%
15.2 mph
2.9


Air Quality

AQI: 1 - Good
PM2.5: 7.53 μg/m3
PM10: 9.27 μg/m3
Carbon Monoxide: 157.52 μg/m3
Nitrogen Dioxide: 10.37 μg/m3
Sulphur Dioxide: 1.9 μg/m3
Ozone: 80.92 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 12:45 AM
Sunset: 7:53 PM
Daylight: 14 hrs 14 mins
Moonrise: 12:47 AM
Moon Transit: 5:12 AM
Moonset: 9:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%

Best Times for Fishing or Hunting

Major Periods

4:42 AM - 7:12 AM
7:33 PM - 10:03 PM

Minor Periods

9:12 AM - 10:42 AM
12:17 AM - 1:47 AM

Action Rating: 3 out of 5

Friday, May 8, 2026

Weather Forecast

Patchy rain nearby
58.5°F
42.8°F
50.8°F
62%
0.09 in
67%
0%
19.7 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 5.1 μg/m3
PM10: 5.33 μg/m3
Carbon Monoxide: 180.93 μg/m3
Nitrogen Dioxide: 10.4 μg/m3
Sulphur Dioxide: 2.07 μg/m3
Ozone: 68.54 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 12:45 AM
Sunset: 7:54 PM
Daylight: 14 hrs 16 mins
Moonrise: 1:22 AM
Moon Transit: 6:01 AM
Moonset: 10:47 AM
Moon Phase: Last Quarter
Moon Illumination: 47.9%

Best Times for Fishing or Hunting

Major Periods

5:31 AM - 8:01 AM
8:20 PM - 10:50 PM

Minor Periods

10:17 AM - 11:47 AM
12:52 AM - 2:22 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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