Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

54.3°F 12.4°C
Cold Thermal Gear Required
54.3°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: Friday, November 13, 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
1.6ft 0.5 m
Light Chop Gentle waves and light chop, ideal for water activities.
Wave Period 3.8s
Wave Direction 58° ENE
Swell Waves
0.9 ft
4.4s • 95° E
Wind Waves / Chop
1.2 ft
2.4s • 356° N
Ocean Current
0.8 mph
0.7 kn • 98° E
Sea Surface Temp
56.3°F
Equivalent: 13.5°C

High & Low Tide Forecast

Rising (Flood)
Next Tide: Low 1:00 AM (-2.6 ft)
0.0 ft (MSL) Fri, Nov 13 12 AM 6 AM 12 PM 6 PM 12 AM 6 AM Sat, Nov 14 Sun, Nov 15 ▼ Low 1:00 AM -2.6 ft ▲ High 8:00 AM +1.3 ft ▼ Low 2:00 PM -3.3 ft ▲ High 8:00 PM +0.3 ft ▼ Low 2:00 AM -3.1 ft NOW
Low Tide Sat, Nov 14
1:00 AM
-2.6 ft (-0.79 m)
High Tide Sat, Nov 14
8:00 AM
+1.3 ft (0.40 m)
Low Tide Sat, Nov 14
2:00 PM
-3.3 ft (-1.02 m)
High Tide Sat, Nov 14
8:00 PM
+0.3 ft (0.08 m)
Open-Meteo Tidal Model (Mean Sea Level MSL datum) • Times in station local timezone.

5-Day Marine Wave Forecast

Today
Nov 14
1.9 ft
3.8s • NNE
Sun
Nov 15
1.8 ft
3.3s • WNW
Mon
Nov 16
1.0 ft
2.8s • NW
Tue
Nov 17
1.2 ft
2.8s • W
Wed
Nov 18
1.2 ft
2.8s • W

Weather for Old Lyme, Connecticut

Current Weather

33.4°F
Clear
Conditions: Clear
Humidity: 80%
Feels Like: 27°F
Wind: N 5.2 mph
Wind Gusts: 21.5 mph
Pressure: 29.68 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 11.6 mi
UV Index: 0

Five-Day Weather Forecast

Overcast
Sat
H: 44°F
L: 32°F
Mainly Sunny
Sun
H: 47°F
L: 33°F
Sunny
Mon
H: 50°F
L: 35°F
Sunny
Tue
H: 54°F
L: 34°F
Mainly Sunny
Wed
H: 58°F
L: 42°F

Air Quality

EPA Index 1 • Good

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

PM2.5
5.5 μg/m³
Good
PM10
5.5 μg/m³
Good
Ozone (O3)
50 μg/m³
Photochemical
NO2
6 μg/m³
Nitrogen Dioxide
SO2
1.3 μg/m³
Sulfur Dioxide
CO
150 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
Saturday, November 14, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 37.4°F
Average Humidity: 77%
Chance of Rain: 5%
Wind: 9 mph
UV Index: 3.2

Air Quality

EPA Index 1 • Good
PM2.5
3.2 μg/m³
Good
PM10
3.2 μg/m³
Good
Ozone (O3)
54.5 μg/m³
Photochemical
NO2
4.6 μg/m³
Nitrogen Dioxide
SO2
0.7 μg/m³
Sulfur Dioxide
CO
139.2 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: Mainly Sunny
Average Temperature: 38.7°F
Average Humidity: 76%
Chance of Rain: 3%
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)
59.2 μg/m³
Photochemical
NO2
3 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
127 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: Sunny
Average Temperature: 40.8°F
Average Humidity: 73%
Chance of Rain: 0%
Wind: 9.8 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
2 μg/m³
Good
PM10
2.1 μg/m³
Good
Ozone (O3)
64 μg/m³
Photochemical
NO2
5.4 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
142.3 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: 42.8°F
Average Humidity: 74%
Chance of Rain: 0%
Wind: 9.4 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
5.2 μg/m³
Good
PM10
5.4 μg/m³
Good
Ozone (O3)
56 μg/m³
Photochemical
NO2
11.2 μg/m³
Nitrogen Dioxide
SO2
1.1 μg/m³
Sulfur Dioxide
CO
186.4 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°F
Average Humidity: 66%
Chance of Rain: 0%
Wind: 8.3 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
8.3 μg/m³
Good
PM10
8.4 μg/m³
Good
Ozone (O3)
40.6 μg/m³
Photochemical
NO2
15.3 μg/m³
Nitrogen Dioxide
SO2
1.3 μg/m³
Sulfur Dioxide
CO
219.9 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
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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