Water Temperature of the Connecticut River in Old Lyme, CT

Current Water Temperature

55.4°F

Measurement Time: Sunday, May 24, 2026, 2:45 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

55°F
Light rain
Light rain
51.3°F
55.7°F
96%
ENE 14.1 mph
21.2 mph
53.4°F
55.3°F
0.02 in
100%
1 mi
1025 mbar
0

Five Day Weather Forecast

Moderate rain
Sun
H: 56°F
L: 49°F
Patchy rain nearby
Mon
H: 63°F
L: 56°F
Sunny
Tue
H: 69°F
L: 55°F
Sunny
Wed
H: 75°F
L: 57°F
Sunny
Thu
H: 70°F
L: 55°F

Air Quality

AQI: 1 - Good
PM2.5: 11.15 μg/m3
PM10: 18.45 μg/m3
Carbon Monoxide: 119.85 μg/m3
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 95 μg/m3

Astronomical

Sunrise: 5:23 AM
Sun Transit: 12:46 AM
Sunset: 8:10 PM
Daylight: 14 hrs 47 mins
Moonrise: 1:47 PM
Moon Transit: 8:08 PM
Moonset: 1:58 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

9:42 AM - 12:12 AM
7:38 PM - 10:08 PM

Minor Periods

1:17 PM - 2:47 PM
1:28 AM - 2:58 AM

Action Rating: 2 out of 5

High Surf Advisory issued May 24 at 2:38AM EDT until May 24 at 9:00PM EDT by NWS Upton NY

Effective: Sun May 24, 2026, 2:38 AM
Expires: Sun May 24, 2026, 8:00 PM

* WHAT...For the High Rip Current Risk, dangerous rip currents. For the High Surf Advisory, large breaking waves of 6 to 10 feet expected in the surf zone. * WHERE...Kings (Brooklyn), Southwest Suffolk, Southeast Suffolk, Southern Queens and Southern Nassau Counties. * WHEN...For the High Rip Current Risk, through Monday evening. For the High Surf Advisory, from 6 AM this morning to 9 PM EDT this evening. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Life-threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.

Inexperienced swimmers should remain out of the water due to dangerous surf conditions. If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.


Rip Current Statement issued May 24 at 2:38AM EDT until May 25 at 9:00PM EDT by NWS Upton NY

Effective: Sun May 24, 2026, 2:38 AM
Expires: Sun May 24, 2026, 8:00 PM

* WHAT...For the High Rip Current Risk, dangerous rip currents. For the High Surf Advisory, large breaking waves of 6 to 10 feet expected in the surf zone. * WHERE...Kings (Brooklyn), Southwest Suffolk, Southeast Suffolk, Southern Queens and Southern Nassau Counties. * WHEN...For the High Rip Current Risk, through Monday evening. For the High Surf Advisory, from 6 AM this morning to 9 PM EDT this evening. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Life-threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.

Inexperienced swimmers should remain out of the water due to dangerous surf conditions. If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.
Sunday, May 24, 2026

Weather Forecast

Moderate rain
55.9°F
48.9°F
53.2°F
94%
0.54 in
89%
0%
19.9 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 9.52 μg/m3
PM10: 14.75 μg/m3
Carbon Monoxide: 119.49 μg/m3
Nitrogen Dioxide: 2.28 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 88.76 μg/m3

Astronomical

Sunrise: 5:23 AM
Sun Transit: 12:46 AM
Sunset: 8:10 PM
Daylight: 14 hrs 47 mins
Moonrise: 1:47 PM
Moon Transit: 8:08 PM
Moonset: 1:58 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

9:42 AM - 12:12 AM
7:38 PM - 10:08 PM

Minor Periods

1:17 PM - 2:47 PM
1:28 AM - 2:58 AM

Action Rating: 2 out of 5

Monday, May 25, 2026

Weather Forecast

Patchy rain nearby
62.5°F
55.9°F
58.9°F
97%
0.09 in
92%
0%
9.4 mph
5.6


Air Quality

AQI: 1 - Good
PM2.5: 6.17 μg/m3
PM10: 8.81 μg/m3
Carbon Monoxide: 131.65 μg/m3
Nitrogen Dioxide: 6.82 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 61.32 μg/m3

Astronomical

Sunrise: 5:22 AM
Sun Transit: 12:46 AM
Sunset: 8:11 PM
Daylight: 14 hrs 49 mins
Moonrise: 2:52 PM
Moon Transit: 8:50 PM
Moonset: 2:19 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

10:24 AM - 12:54 AM
8:20 PM - 10:50 PM

Minor Periods

2:22 PM - 3:52 PM
1:49 AM - 3:19 AM

Action Rating: 3 out of 5

Tuesday, May 26, 2026

Weather Forecast

Sunny
68.6°F
55.3°F
61.6°F
82%
0 in
0%
0%
10.5 mph
5.3


Air Quality

AQI: 1 - Good
PM2.5: 14.56 μg/m3
PM10: 15.27 μg/m3
Carbon Monoxide: 181.93 μg/m3
Nitrogen Dioxide: 27.25 μg/m3
Sulphur Dioxide: 1.93 μg/m3
Ozone: 44.44 μg/m3

Astronomical

Sunrise: 5:22 AM
Sun Transit: 12:46 AM
Sunset: 8:12 PM
Daylight: 14 hrs 50 mins
Moonrise: 3:55 PM
Moon Transit: 9:32 PM
Moonset: 2:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

11:06 AM - 1:36 PM
9:02 PM - 11:32 PM

Minor Periods

3:25 PM - 4:55 PM
2:09 AM - 3:39 AM

Action Rating: 2 out of 5

Wednesday, May 27, 2026

Weather Forecast

Sunny
74.9°F
56.5°F
65.8°F
74%
0 in
0%
0%
11.2 mph
7.8


Air Quality

AQI: 2 - Moderate
PM2.5: 17.55 μg/m3
PM10: 18.41 μg/m3
Carbon Monoxide: 195.44 μg/m3
Nitrogen Dioxide: 18.03 μg/m3
Sulphur Dioxide: 2.81 μg/m3
Ozone: 86.52 μg/m3

Astronomical

Sunrise: 5:21 AM
Sun Transit: 12:46 AM
Sunset: 8:13 PM
Daylight: 14 hrs 52 mins
Moonrise: 4:59 PM
Moon Transit: 10:14 PM
Moonset: 3:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

11:48 AM - 2:18 PM
12:00 AM - 12:00 AM

Minor Periods

4:29 PM - 5:59 PM
2:30 AM - 4:00 AM

Action Rating: 2 out of 5

Thursday, May 28, 2026

Weather Forecast

Sunny
70.1°F
55°F
62.9°F
63%
0 in
0%
0%
15.2 mph
1.1


Air Quality

AQI: 1 - Good
PM2.5: 9.36 μg/m3
PM10: 9.9 μg/m3
Carbon Monoxide: 212.07 μg/m3
Nitrogen Dioxide: 10.73 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 73.08 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:46 AM
Sunset: 8:13 PM
Daylight: 14 hrs 53 mins
Moonrise: 6:03 PM
Moon Transit: 11:00 PM
Moonset: 3:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.7%

Best Times for Fishing or Hunting

Major Periods

12:32 AM - 3:02 PM
12:00 AM - 12:00 AM

Minor Periods

5:33 PM - 7:03 PM
2:52 AM - 4:22 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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