Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

52.2°F 11.2°C
Cold Thermal Gear Required
52.2°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: Saturday, November 14, 2026, 7:45 PM 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)

Marine Weather for the Connecticut River in Old Lyme, CT

Marine Weather

Coastal & Marine Conditions
Open-Meteo Marine
1.7ft 0.5 m
Light Chop Gentle waves and light chop, ideal for water activities.
Wave Period 3.2s
Wave Direction 278° W
Swell Waves
0.7 ft
3.2s • 251° WSW
Wind Waves / Chop
1.5 ft
2.6s • 294° WNW
Ocean Current
0.4 mph
0.3 kn • 108° ESE
Sea Surface Temp
55.6°F
Equivalent: 13.1°C

High & Low Tide Forecast

Falling (Ebb)
Next Tide: Low 2:00 AM (-3.1 ft)
0.0 ft (MSL) Sat, Nov 14 12 AM 6 AM 12 PM 6 PM 12 AM 6 AM Sun, Nov 15 Mon, Nov 16 ▲ High 8:00 PM +0.3 ft ▼ Low 2:00 AM -3.1 ft ▲ High 9:00 AM +0.5 ft ▼ Low 3:00 PM -3.4 ft ▲ High 9:00 PM +0.2 ft ▼ Low 3:00 AM -3.2 ft NOW
High Tide Sat, Nov 14
8:00 PM
+0.3 ft (0.10 m)
Low Tide Sun, Nov 15
2:00 AM
-3.1 ft (-0.94 m)
High Tide Sun, Nov 15
9:00 AM
+0.5 ft (0.15 m)
Low Tide Sun, Nov 15
3:00 PM
-3.4 ft (-1.05 m)
Open-Meteo Tidal Model (Mean Sea Level MSL datum) • Times in station local timezone.

5-Day Marine Wave Forecast

Today
Nov 15
1.7 ft
3.2s • WNW
Mon
Nov 16
1.0 ft
2.8s • NW
Tue
Nov 17
1.2 ft
2.7s • W
Wed
Nov 18
1.4 ft
2.8s • WSW
Thu
Nov 19
1.0 ft
3.2s • WSW

Weather for Old Lyme, Connecticut

Current Weather

35.8°F
Clear
Conditions: Clear
Humidity: 82%
Feels Like: 28.9°F
Wind: NW 6.6 mph
Wind Gusts: 22.1 mph
Pressure: 29.9 in
Precipitation: 0 in
Cloud Cover: 10%
Visibility: 10.9 mi
UV Index: 0

Five-Day Weather Forecast

Overcast
Sun
H: 47°F
L: 33°F
Overcast
Mon
H: 47°F
L: 33°F
Sunny
Tue
H: 55°F
L: 35°F
Mainly Sunny
Wed
H: 59°F
L: 43°F
Overcast
Thu
H: 57°F
L: 44°F

Air Quality

EPA Index 1 • Good

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

PM2.5
0.8 μg/m³
Good
PM10
0.8 μg/m³
Good
Ozone (O3)
52 μg/m³
Photochemical
NO2
2.9 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
131 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
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 39°F
Average Humidity: 76%
Chance of Rain: 2%
Wind: 10.3 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
0.9 μg/m³
Good
PM10
0.9 μg/m³
Good
Ozone (O3)
58.2 μg/m³
Photochemical
NO2
3 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
131.6 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
Monday, November 16, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 38.8°F
Average Humidity: 79%
Chance of Rain: 1%
Wind: 9.2 mph
UV Index: 3

Air Quality

EPA Index 1 • Good
PM2.5
2.1 μg/m³
Good
PM10
2.2 μg/m³
Good
Ozone (O3)
62.3 μg/m³
Photochemical
NO2
5.9 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
146.3 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 50m daylight
Sunrise 6:39 AM
Solar Noon 11:34 AM
Sunset 4:29 PM
Moon
First Quarter • 42%
Moonrise 12:23 PM
Transit 5:29 PM
Moonset 10:44 PM

Best Times for Fishing or Hunting

Major Periods

4:37 AM - 7:07 AM
4:59 PM - 7:29 PM

Minor Periods

11:53 AM - 1:23 PM
10:14 PM - 11:44 PM
Action Rating:
Very Good 4/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 43.7°F
Average Humidity: 72%
Chance of Rain: 0%
Wind: 9.6 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
6.5 μg/m³
Good
PM10
6.6 μg/m³
Good
Ozone (O3)
49.8 μg/m³
Photochemical
NO2
11.8 μg/m³
Nitrogen Dioxide
SO2
1.3 μg/m³
Sulfur Dioxide
CO
176.9 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 48m daylight
Sunrise 6:40 AM
Solar Noon 11:34 AM
Sunset 4:29 PM
Moon
First Quarter • 54%
Moonrise 12:47 PM
Transit 6:12 PM
Moonset 11:48 PM

Best Times for Fishing or Hunting

Major Periods

5:21 AM - 7:51 AM
5:42 PM - 8:12 PM

Minor Periods

12:17 PM - 1:47 PM
11:18 PM - 12:48 AM
Action Rating:
Fair Action 2/5
Wednesday, November 18, 2026

Weather Forecast

Conditions: Mainly Sunny
Average Temperature: 48.7°F
Average Humidity: 64%
Chance of Rain: 0%
Wind: 7.7 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
9 μg/m³
Good
PM10
9.1 μg/m³
Good
Ozone (O3)
40 μg/m³
Photochemical
NO2
21.7 μg/m³
Nitrogen Dioxide
SO2
1.6 μg/m³
Sulfur Dioxide
CO
213.7 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 46m daylight
Sunrise 6:42 AM
Solar Noon 11:34 AM
Sunset 4:28 PM
Moon
First Quarter • 65%
Moonrise 1:08 PM
Transit 6:55 PM
Moonset 1:33 AM

Best Times for Fishing or Hunting

Major Periods

6:03 AM - 8:33 AM
6:25 PM - 8:55 PM

Minor Periods

1:03 AM - 2:33 AM
12:38 PM - 2:08 PM
Action Rating:
Fair Action 2/5
Thursday, November 19, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 49.8°F
Average Humidity: 63%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 3

Air Quality

EPA Index 2 • Moderate
PM2.5
11.7 μg/m³
Good
PM10
11.9 μg/m³
Good
Ozone (O3)
29 μg/m³
Photochemical
NO2
32 μg/m³
Nitrogen Dioxide
SO2
1.3 μg/m³
Sulfur Dioxide
CO
284.5 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 44m daylight
Sunrise 6:43 AM
Solar Noon 11:34 AM
Sunset 4:27 PM
Moon
Waxing Gibbous • 75%
Moonrise 1:29 PM
Transit 12:00 PM
Moonset 12:53 AM

Best Times for Fishing or Hunting

Major Periods

11:30 AM - 2:00 PM
11:55 PM - 2:25 AM

Minor Periods

12:23 AM - 1:53 AM
12:59 PM - 2:29 PM
Action Rating:
Fair Action 2/5
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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