Water Temperature of the Mystic River in Old Mystic, CT

Current Water Temperature

54.5°F

Measurement Time: Wednesday, April 5, 2023, 10:36 AM EDT

Temperature Locations

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Mystic River

Station Name: MYSTIC RIVER US RTE I95 BRIDGE NEAR OLD MYSTIC, CT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet

Nearest Address:
3 Whitehall Lndg
Old Mystic, CT 06355
New London County

GPS Coordinates: 41.37782778, -71.9631806

Nearby Water Temperatures

Mystic River, Mystic, CT (1.1 mi)
Mystic Harbor, Mystic, CT (2.2 mi)
Mystic River, Noank, CT (3.6 mi)
Thames River, Groton, CT (6.5 mi)
Pawcatuck River, Westerly, RI (6.8 mi)
Thames River, New London, CT (6.9 mi)
Yantic River, Norwich, CT (14.9 mi)
East Branch Eightmile River, Lyme, CT (19.6 mi)
Eightmile River, East Haddam, CT (19.6 mi)
Connecticut River, Old Lyme, CT (20.4 mi)
Fort Pond Bay, Montauk, NY (22.8 mi)
Orient Harbor, Orient, NY (24.4 mi)
Natchaug River, Chaplin, CT (31.2 mi)
Hemlock Brook, Foster, RI (31.6 mi)
Wilbur Hollow Brook, Clayville, RI (31.6 mi)

Weather for Old Mystic, Connecticut

Current Weather

48°F
Sunny
Sunny
44.3°F
49.6°F
63%
SSE 8.1 mph
12.3 mph
46.6°F
39.7°F
0 in
0%
9 mi
1012 mbar
0.1

Five Day Weather Forecast

Sunny
Fri
H: 64°F
L: 40°F
Patchy rain nearby
Sat
H: 51°F
L: 36°F
Moderate rain
Sun
H: 45°F
L: 40°F
Overcast
Mon
H: 58°F
L: 40°F
Partly Cloudy
Tue
H: 62°F
L: 39°F

Air Quality

AQI: 1 - Good
PM2.5: 7.95 μg/m3
PM10: 9.95 μg/m3
Carbon Monoxide: 203.85 μg/m3
Nitrogen Dioxide: 13.05 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 71 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 12:45 AM
Sunset: 7:38 PM
Daylight: 13 hrs 43 mins
Moonrise: 12:26 AM
Moon Transit: 7:52 PM
Moonset: 2:36 AM
Moon Phase: First Quarter
Moon Illumination: 50.4%

Best Times for Fishing or Hunting

Major Periods

9:25 AM - 11:55 AM
7:22 PM - 9:52 PM

Minor Periods

11:56 AM - 1:26 PM
2:06 AM - 3:36 AM

Action Rating: 3 out of 5

Frost Advisory issued April 24 at 2:15PM EDT until April 25 at 8:00AM EDT by NWS Upton NY

Effective: Fri April 24, 2026, 2:15 PM
Expires: Sat April 25, 2026, 3:30 AM

* WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. * WHEN...From midnight tonight to 8 AM EDT Saturday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.
Friday, April 24, 2026

Weather Forecast

Sunny
64°F
39.9°F
50.6°F
50%
0 in
0%
0%
8.3 mph
6.1


Air Quality

AQI: 1 - Good
PM2.5: 4.07 μg/m3
PM10: 4.85 μg/m3
Carbon Monoxide: 170.93 μg/m3
Nitrogen Dioxide: 7.23 μg/m3
Sulphur Dioxide: 1.67 μg/m3
Ozone: 80.64 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 12:45 AM
Sunset: 7:38 PM
Daylight: 13 hrs 43 mins
Moonrise: 12:26 AM
Moon Transit: 7:52 PM
Moonset: 2:36 AM
Moon Phase: First Quarter
Moon Illumination: 50.4%

Best Times for Fishing or Hunting

Major Periods

9:25 AM - 11:55 AM
7:22 PM - 9:52 PM

Minor Periods

11:56 AM - 1:26 PM
2:06 AM - 3:36 AM

Action Rating: 3 out of 5

Saturday, April 25, 2026

Weather Forecast

Patchy rain nearby
51.2°F
35.6°F
43.4°F
69%
0.01 in
83%
0%
7.6 mph
4.6


Air Quality

AQI: 1 - Good
PM2.5: 6.3 μg/m3
PM10: 7.48 μg/m3
Carbon Monoxide: 177.61 μg/m3
Nitrogen Dioxide: 9.42 μg/m3
Sulphur Dioxide: 2.22 μg/m3
Ozone: 69.36 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 12:45 AM
Sunset: 7:39 PM
Daylight: 13 hrs 46 mins
Moonrise: 1:37 PM
Moon Transit: 8:40 PM
Moonset: 3:05 AM
Moon Phase: First Quarter
Moon Illumination: 61.6%

Best Times for Fishing or Hunting

Major Periods

10:15 AM - 12:45 AM
8:10 PM - 10:40 PM

Minor Periods

1:07 PM - 2:37 PM
2:35 AM - 4:05 AM

Action Rating: 2 out of 5

Sunday, April 26, 2026

Weather Forecast

Moderate rain
45°F
40.4°F
42.5°F
88%
0.34 in
86%
0%
9.4 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 4.23 μg/m3
PM10: 5.08 μg/m3
Carbon Monoxide: 158.85 μg/m3
Nitrogen Dioxide: 6.85 μg/m3
Sulphur Dioxide: 2 μg/m3
Ozone: 74.52 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 12:45 AM
Sunset: 7:40 PM
Daylight: 13 hrs 48 mins
Moonrise: 2:46 PM
Moon Transit: 9:24 PM
Moonset: 3:30 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%

Best Times for Fishing or Hunting

Major Periods

11:01 AM - 1:31 PM
8:54 PM - 11:24 PM

Minor Periods

2:16 PM - 3:46 PM
3:00 AM - 4:30 AM

Action Rating: 2 out of 5

Monday, April 27, 2026

Weather Forecast

Overcast
57.6°F
40.4°F
47.6°F
72%
0 in
0%
0%
14.8 mph
5.9


Air Quality

AQI: 1 - Good
PM2.5: 4.22 μg/m3
PM10: 4.91 μg/m3
Carbon Monoxide: 156.11 μg/m3
Nitrogen Dioxide: 7.87 μg/m3
Sulphur Dioxide: 2.47 μg/m3
Ozone: 80.36 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 12:45 AM
Sunset: 7:41 PM
Daylight: 13 hrs 51 mins
Moonrise: 3:52 PM
Moon Transit: 10:07 PM
Moonset: 3:51 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.8%

Best Times for Fishing or Hunting

Major Periods

11:44 AM - 2:14 PM
12:00 AM - 12:00 AM

Minor Periods

3:22 PM - 4:52 PM
3:21 AM - 4:51 AM

Action Rating: 2 out of 5

Tuesday, April 28, 2026

Weather Forecast

Partly Cloudy
62°F
38.5°F
50°F
68%
0 in
0%
0%
13.9 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 6.13 μg/m3
PM10: 7.65 μg/m3
Carbon Monoxide: 175.87 μg/m3
Nitrogen Dioxide: 11.57 μg/m3
Sulphur Dioxide: 3.05 μg/m3
Ozone: 64.15 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 12:45 AM
Sunset: 7:42 PM
Daylight: 13 hrs 53 mins
Moonrise: 4:57 PM
Moon Transit: 10:49 PM
Moonset: 4:12 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 89.6%

Best Times for Fishing or Hunting

Major Periods

12:26 AM - 2:56 PM
12:00 AM - 12:00 AM

Minor Periods

4:27 PM - 5:57 PM
3:42 AM - 5:12 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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