Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

56.8°F 13.8°C
Cold Thermal Gear Required
56.8°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Cold shock risk with rapid dexterity loss (10–15 mins). Wetsuit or drysuit strongly advised for any immersion.

Measurement Time: Wednesday, November 11, 2026, 6:45 AM EST

Temperature Locations

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Local Points of Interest

Ferry Landing State Park

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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

57°F
Sunny
Conditions: Sunny
Humidity: 49%
Feels Like: 51.6°F
Wind: NW 6.3 mph
Wind Gusts: 11.9 mph
Pressure: 29.89 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 26.3 mi
UV Index: 3.1

Five-Day Weather Forecast

Overcast
Wed
H: 58°F
L: 38°F
Moderate Rain
Thu
H: 56°F
L: 43°F
Slight Rain
Fri
H: 45°F
L: 36°F
Overcast
Sat
H: 44°F
L: 34°F
Overcast
Sun
H: 48°F
L: 35°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
2.5 μg/m³
Good
PM10
2.9 μg/m³
Good
Ozone (O3)
65 μg/m³
Photochemical
NO2
3.8 μg/m³
Nitrogen Dioxide
SO2
0.6 μg/m³
Sulfur Dioxide
CO
148 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 1m daylight
Sunrise 6:33 AM
Solar Noon 11:33 AM
Sunset 4:34 PM
Moon
New • 2%
Moonrise 9:07 AM
Transit 1:27 PM
Moonset 5:46 PM

Best Times for Fishing or Hunting

Major Periods

12:31 AM - 3:01 AM
12:57 PM - 3:27 PM

Minor Periods

8:37 AM - 10:07 AM
5:16 PM - 6:46 PM
Action Rating:
Good Action 3/5
Wednesday, November 11, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 49.1°F
Average Humidity: 63%
Chance of Rain: 4%
Wind: 6.7 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
3.7 μg/m³
Good
PM10
4.3 μg/m³
Good
Ozone (O3)
59.6 μg/m³
Photochemical
NO2
7.9 μg/m³
Nitrogen Dioxide
SO2
1 μg/m³
Sulfur Dioxide
CO
188.4 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 1m daylight
Sunrise 6:33 AM
Solar Noon 11:33 AM
Sunset 4:34 PM
Moon
New • 2%
Moonrise 9:07 AM
Transit 1:27 PM
Moonset 5:46 PM

Best Times for Fishing or Hunting

Major Periods

12:31 AM - 3:01 AM
12:57 PM - 3:27 PM

Minor Periods

8:37 AM - 10:07 AM
5:16 PM - 6:46 PM
Action Rating:
Good Action 3/5
Thursday, November 12, 2026

Weather Forecast

Conditions: Moderate Rain
Average Temperature: 48.4°F
Average Humidity: 77%
Chance of Rain: 72%
Wind: 11.9 mph
UV Index: 1.3

Air Quality

EPA Index 1 • Good
PM2.5
5.9 μg/m³
Good
PM10
8.5 μg/m³
Good
Ozone (O3)
73 μg/m³
Photochemical
NO2
2.5 μg/m³
Nitrogen Dioxide
SO2
0.6 μg/m³
Sulfur Dioxide
CO
185.5 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 58m daylight
Sunrise 6:34 AM
Solar Noon 11:33 AM
Sunset 4:33 PM
Moon
Waxing Crescent • 6%
Moonrise 10:01 AM
Transit 2:19 PM
Moonset 6:39 PM

Best Times for Fishing or Hunting

Major Periods

1:23 AM - 3:53 AM
1:49 PM - 4:19 PM

Minor Periods

9:31 AM - 11:01 AM
6:09 PM - 7:39 PM
Action Rating:
Good Action 3/5
Friday, November 13, 2026

Weather Forecast

Conditions: Slight Rain
Average Temperature: 40.8°F
Average Humidity: 91%
Chance of Rain: 82%
Wind: 17.5 mph
UV Index: 0.3

Air Quality

EPA Index 1 • Good
PM2.5
1.1 μg/m³
Good
PM10
1.2 μg/m³
Good
Ozone (O3)
66 μg/m³
Photochemical
NO2
4.1 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
138 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 56m daylight
Sunrise 6:36 AM
Solar Noon 11:33 AM
Sunset 4:32 PM
Moon
Waxing Crescent • 13%
Moonrise 10:47 AM
Transit 3:09 PM
Moonset 7:36 PM

Best Times for Fishing or Hunting

Major Periods

2:14 AM - 4:44 AM
2:39 PM - 5:09 PM

Minor Periods

10:17 AM - 11:47 AM
7:06 PM - 8:36 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 38.1°F
Average Humidity: 81%
Chance of Rain: 35%
Wind: 13.5 mph
UV Index: 2.1

Air Quality

EPA Index 1 • Good
PM2.5
1.4 μg/m³
Good
PM10
1.5 μg/m³
Good
Ozone (O3)
56.7 μg/m³
Photochemical
NO2
4 μg/m³
Nitrogen Dioxide
SO2
0.9 μg/m³
Sulfur Dioxide
CO
131.4 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 54m daylight
Sunrise 6:37 AM
Solar Noon 11:33 AM
Sunset 4:31 PM
Moon
Waxing Crescent • 21%
Moonrise 11:25 AM
Transit 3:58 PM
Moonset 8:38 PM

Best Times for Fishing or Hunting

Major Periods

3:04 AM - 5:34 AM
3:28 PM - 5:58 PM

Minor Periods

10:55 AM - 12:25 PM
8:08 PM - 9:38 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 39.6°F
Average Humidity: 74%
Chance of Rain: 0%
Wind: 13.3 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
1.4 μg/m³
Good
PM10
1.5 μg/m³
Good
Ozone (O3)
60.8 μg/m³
Photochemical
NO2
3.5 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
128.9 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 52m daylight
Sunrise 6:38 AM
Solar Noon 11:34 AM
Sunset 4:30 PM
Moon
Waxing Crescent • 31%
Moonrise 11:56 AM
Transit 4:45 PM
Moonset 9:40 PM

Best Times for Fishing or Hunting

Major Periods

3:52 AM - 6:22 AM
4:15 PM - 6:45 PM

Minor Periods

11:26 AM - 12:56 PM
9:10 PM - 10:40 PM
Action Rating:
Very Good 4/5
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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