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
45°F

Sunny
39.5°F
49.6°F
40%
SSW 10.7 mph
12.3 mph
45.7°F
21.3°F
0 in
25%
9 mi
1026 mbar
2.7
Five Day Weather Forecast

Tue
H: 50°F
L: 31°F

Wed
H: 44°F
L: 37°F

Thu
H: 59°F
L: 38°F

Fri
H: 58°F
L: 39°F

Sat
H: 51°F
L: 39°F
Air Quality
AQI:
1 - Good
PM2.5:
7.35 μg/m3
PM10:
8.05 μg/m3
Carbon Monoxide: 180.85 μg/m3
Nitrogen Dioxide: 6.05 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 101 μg/m3
Nitrogen Dioxide: 6.05 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 101 μg/m3
Astronomical
Sunrise: 5:59 AM
Sun Transit: 12:46 AM
Sunset: 7:35 PM
Daylight: 13 hrs 36 mins
Sun Transit: 12:46 AM
Sunset: 7:35 PM
Daylight: 13 hrs 36 mins
Moonrise: 8:46 AM
Moon Transit: 4:58 PM
Moonset: 12:07 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%
Moon Transit: 4:58 PM
Moonset: 12:07 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%
Best Times for Fishing or Hunting
Major Periods
6:27 AM - 8:57 AM4:28 PM - 6:58 PM
Minor Periods
8:16 AM - 9:46 AM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Tuesday, April 21, 2026
Weather Forecast
Sunny
50.4°F
30.6°F
41.1°F
49%
0 in
0%
0%
10.7 mph
6
Air Quality
AQI:
1 - Good
PM2.5:
5.77 μg/m3
PM10:
6.41 μg/m3
Carbon Monoxide: 180.69 μg/m3
Nitrogen Dioxide: 4.85 μg/m3
Sulphur Dioxide: 2.19 μg/m3
Ozone: 89.84 μg/m3
Nitrogen Dioxide: 4.85 μg/m3
Sulphur Dioxide: 2.19 μg/m3
Ozone: 89.84 μg/m3
Astronomical
Sunrise: 5:59 AM
Sun Transit: 12:46 AM
Sunset: 7:35 PM
Daylight: 13 hrs 36 mins
Sun Transit: 12:46 AM
Sunset: 7:35 PM
Daylight: 13 hrs 36 mins
Moonrise: 8:46 AM
Moon Transit: 4:58 PM
Moonset: 12:07 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%
Moon Transit: 4:58 PM
Moonset: 12:07 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%
Best Times for Fishing or Hunting
Major Periods
6:27 AM - 8:57 AM4:28 PM - 6:58 PM
Minor Periods
8:16 AM - 9:46 AM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
Wednesday, April 22, 2026
Weather Forecast
Moderate rain
44°F
36.8°F
40.4°F
89%
0.24 in
91%
0%
11.6 mph
0.7
Air Quality
AQI:
1 - Good
PM2.5:
10.65 μg/m3
PM10:
14.25 μg/m3
Carbon Monoxide: 161.37 μg/m3
Nitrogen Dioxide: 4.14 μg/m3
Sulphur Dioxide: 2.11 μg/m3
Ozone: 103.28 μg/m3
Nitrogen Dioxide: 4.14 μg/m3
Sulphur Dioxide: 2.11 μg/m3
Ozone: 103.28 μg/m3
Astronomical
Sunrise: 5:58 AM
Sun Transit: 12:46 AM
Sunset: 7:36 PM
Daylight: 13 hrs 38 mins
Sun Transit: 12:46 AM
Sunset: 7:36 PM
Daylight: 13 hrs 38 mins
Moonrise: 9:56 AM
Moon Transit: 6:01 PM
Moonset: 1:09 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%
Moon Transit: 6:01 PM
Moonset: 1:09 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%
Best Times for Fishing or Hunting
Major Periods
7:31 AM - 10:01 AM5:31 PM - 8:01 PM
Minor Periods
9:26 AM - 10:56 AM12:39 AM - 2:09 AM
Action Rating: 3 out of 5
Thursday, April 23, 2026
Weather Forecast
Patchy rain nearby
58.6°F
37.5°F
47.6°F
74%
0 in
0%
0%
13 mph
5.1
Air Quality
AQI:
1 - Good
PM2.5:
11.71 μg/m3
PM10:
15.43 μg/m3
Carbon Monoxide: 158.53 μg/m3
Nitrogen Dioxide: 5.59 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 91.2 μg/m3
Nitrogen Dioxide: 5.59 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 91.2 μg/m3
Astronomical
Sunrise: 5:56 AM
Sun Transit: 12:46 AM
Sunset: 7:37 PM
Daylight: 13 hrs 41 mins
Sun Transit: 12:46 AM
Sunset: 7:37 PM
Daylight: 13 hrs 41 mins
Moonrise: 11:10 AM
Moon Transit: 7:00 PM
Moonset: 1:58 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%
Moon Transit: 7:00 PM
Moonset: 1:58 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%
Best Times for Fishing or Hunting
Major Periods
8:31 AM - 11:01 AM6:30 PM - 9:00 PM
Minor Periods
10:40 AM - 12:10 AM1:28 AM - 2:58 AM
Action Rating: 2 out of 5
Friday, April 24, 2026
Weather Forecast
Sunny
57.5°F
38.8°F
47.5°F
58%
0 in
0%
0%
9.6 mph
6
Air Quality
AQI:
1 - Good
PM2.5:
4.19 μg/m3
PM10:
4.87 μg/m3
Carbon Monoxide: 180.2 μg/m3
Nitrogen Dioxide: 7.56 μg/m3
Sulphur Dioxide: 2.1 μg/m3
Ozone: 83.4 μg/m3
Nitrogen Dioxide: 7.56 μg/m3
Sulphur Dioxide: 2.1 μg/m3
Ozone: 83.4 μg/m3
Astronomical
Sunrise: 5:55 AM
Sun Transit: 12:45 AM
Sunset: 7:38 PM
Daylight: 13 hrs 43 mins
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%
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 AM7:22 PM - 9:52 PM
Minor Periods
11:56 AM - 1:26 PM2:06 AM - 3:36 AM
Action Rating: 3 out of 5
Saturday, April 25, 2026
Weather Forecast
Overcast
51.4°F
39°F
44.3°F
73%
0 in
0%
0%
10.1 mph
0.8
Air Quality
AQI:
1 - Good
PM2.5:
10.72 μg/m3
PM10:
13.51 μg/m3
Carbon Monoxide: 221.49 μg/m3
Nitrogen Dioxide: 14.35 μg/m3
Sulphur Dioxide: 2.5 μg/m3
Ozone: 70.77 μg/m3
Nitrogen Dioxide: 14.35 μg/m3
Sulphur Dioxide: 2.5 μg/m3
Ozone: 70.77 μg/m3
Astronomical
Sunrise: 5:53 AM
Sun Transit: 12:45 AM
Sunset: 7:39 PM
Daylight: 13 hrs 46 mins
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%
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 AM8:10 PM - 10:40 PM
Minor Periods
1:07 PM - 2:37 PM2:35 AM - 4:05 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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