Water Temperature of the Mystic River in Old Mystic, CT
Current Water Temperature
Measurement Time: Wednesday, April 5, 2023, 10:42 AM EDT
Temperature Locations
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Station Name: MYSTIC RIVER US RTE I95 BRIDGE NEAR OLD MYSTIC, CT
Data Source: Water Data - usgc.gov
Elevation Above Sea Level: 0 feet / 0 meters
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

Humidity: 62%
Feels Like: 38°F
Wind: NNW 11.9 mph
Wind Gusts: 18.6 mph
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast

Fri
H: 65°F
L: 42°F

Sat
H: 61°F
L: 46°F

Sun
H: 64°F
L: 58°F

Mon
H: 65°F
L: 55°F

Tue
H: 63°F
L: 50°F
Air Quality
Nitrogen Dioxide: 3.55 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 57 μg/m3
Astronomical
Sun Transit: 12:33 AM
Sunset: 6:03 PM
Daylight: 11 hrs 1 mins
Moon Transit: 9:51 AM
Moonset: 4:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 11.3%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM9:21 AM - 11:51 AM
Minor Periods
3:56 PM - 5:26 PM2:35 AM - 4:05 AM
Action Rating: 2 out of 5
Frost Advisory issued October 17 at 1:44AM EDT until October 18 at 9:00AM EDT by NWS Upton NY
Effective: Fri October 17, 2025, 1:44 AM
Expires: Fri October 17, 2025, 2:45 PM
* WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...In Connecticut, Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. In New Jersey, Western Passaic County. In New York, Northern Westchester, Orange, Putnam, and Rockland Counties. * WHEN...From 11 PM this evening to 9 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.
Weather Forecast
Average Temperature: 52.8°F
Average Humidity: 57%
Wind: 14.8 mph
UV Index: 0.7
Air Quality
Nitrogen Dioxide: 3.47 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 67.96 μg/m3
Astronomical
Sun Transit: 12:33 AM
Sunset: 6:03 PM
Daylight: 11 hrs 1 mins
Moon Transit: 9:51 AM
Moonset: 4:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 11.3%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM9:21 AM - 11:51 AM
Minor Periods
3:56 PM - 5:26 PM2:35 AM - 4:05 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 54.1°F
Average Humidity: 62%
Wind: 8.7 mph
UV Index: 0.8
Air Quality
Nitrogen Dioxide: 6.71 μg/m3
Sulphur Dioxide: 2.06 μg/m3
Ozone: 62.24 μg/m3
Astronomical
Sun Transit: 12:32 AM
Sunset: 6:02 PM
Daylight: 10 hrs 59 mins
Moon Transit: 10:32 AM
Moonset: 4:45 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.2%
Best Times for Fishing or Hunting
Major Periods
12:10 AM - 2:40 AM10:02 AM - 12:32 AM
Minor Periods
4:15 PM - 5:45 PM3:39 AM - 5:09 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 61.5°F
Average Humidity: 76%
Wind: 16.3 mph
UV Index: 0.8
Air Quality
Nitrogen Dioxide: 3.85 μg/m3
Sulphur Dioxide: 2.31 μg/m3
Ozone: 89.84 μg/m3
Astronomical
Sun Transit: 12:32 AM
Sunset: 6:00 PM
Daylight: 10 hrs 56 mins
Moon Transit: 11:12 AM
Moonset: 5:03 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.3%
Best Times for Fishing or Hunting
Major Periods
12:50 AM - 3:20 AM10:42 AM - 1:12 PM
Minor Periods
4:33 PM - 6:03 PM4:41 AM - 6:11 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 61.8°F
Average Humidity: 85%
Wind: 23.9 mph
UV Index: 0.5
Air Quality
Nitrogen Dioxide: 4.89 μg/m3
Sulphur Dioxide: 2.59 μg/m3
Ozone: 81.8 μg/m3
Astronomical
Sun Transit: 12:32 AM
Sunset: 5:59 PM
Daylight: 10 hrs 53 mins
Moon Transit: 11:53 AM
Moonset: 5:23 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%
Best Times for Fishing or Hunting
Major Periods
1:31 AM - 4:01 AM11:23 AM - 1:53 PM
Minor Periods
4:53 PM - 6:23 PM5:44 AM - 7:14 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 56.9°F
Average Humidity: 69%
Wind: 15.2 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 8.62 μg/m3
Sulphur Dioxide: 2.83 μg/m3
Ozone: 68.08 μg/m3
Astronomical
Sun Transit: 12:32 AM
Sunset: 5:57 PM
Daylight: 10 hrs 51 mins
Moon Transit: 12:34 AM
Moonset: 5:44 PM
Moon Phase: New
Moon Illumination: 1.2%
Best Times for Fishing or Hunting
Major Periods
2:12 AM - 4:42 AM12:04 AM - 2:34 PM
Minor Periods
5:14 PM - 6:44 PM6:46 AM - 8:16 AM
Action Rating: 4 out of 5