Water Temperature of the Mystic River in Old Mystic, CT

Current Water Temperature

54.5°F

Measurement Time: Wednesday, April 5, 2023, 10:42 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

12°F
Sunny
Sunny
-6.5°F
13.1°F
55%
N 20.6 mph
25.2 mph
-2.8°F
1.7°F
0 in
0%
9 mi
1008 mbar
1.3

Five Day Weather Forecast

Sunny
Sun
H: 29°F
L: 9°F
Overcast
Mon
H: 29°F
L: 12°F
Sunny
Tue
H: 30°F
L: 16°F
Overcast
Wed
H: 30°F
L: 14°F
Light freezing rain
Thu
H: 27°F
L: 10°F

Air Quality

AQI: 1 - Good
PM2.5: 3.75 μg/m3
PM10: 4.35 μg/m3
Carbon Monoxide: 174.85 μg/m3
Nitrogen Dioxide: 6.15 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 79 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:01 AM
Sunset: 5:04 PM
Daylight: 10 hrs 5 mins
Moonrise: 4:53 PM
Moon Transit: 12:00 AM
Moonset: 7:01 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:52 PM - 4:22 PM

Minor Periods

4:23 PM - 5:53 PM
6:31 AM - 8:01 AM

Action Rating: 4 out of 5

Cold Weather Advisory issued February 1 at 1:14AM EST until February 1 at 10:00AM EST by NWS Upton NY

Effective: Sun February 1, 2026, 1:14 AM
Expires: Sun February 1, 2026, 10:00 AM

* WHAT...Very cold wind chills as low as 10 to 15 below. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...Until 10 AM EST this morning. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued February 1 at 1:56AM EST until February 1 at 10:00AM EST by NWS Boston/Norton MA

Effective: Sun February 1, 2026, 1:56 AM
Expires: Sun February 1, 2026, 10:00 AM

* WHAT...Very cold wind chills as low as 15 below. * WHERE...Northern Connecticut and portions of western Massachusetts. * WHEN...Until 10 AM EST this morning. * IMPACTS...The cold wind chills as low as 15 below zero could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.
Sunday, February 1, 2026

Weather Forecast

Sunny
29.1°F
9.3°F
16.4°F
67%
0 in
0%
0%
21 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 4.73 μg/m3
PM10: 5.29 μg/m3
Carbon Monoxide: 190.97 μg/m3
Nitrogen Dioxide: 7.38 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 71.04 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:01 AM
Sunset: 5:04 PM
Daylight: 10 hrs 5 mins
Moonrise: 4:53 PM
Moon Transit: 12:00 AM
Moonset: 7:01 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:52 PM - 4:22 PM

Minor Periods

4:23 PM - 5:53 PM
6:31 AM - 8:01 AM

Action Rating: 4 out of 5

Monday, February 2, 2026

Weather Forecast

Overcast
28.8°F
12°F
19.4°F
62%
0 in
0%
0%
11.6 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 4.86 μg/m3
PM10: 5.27 μg/m3
Carbon Monoxide: 188.49 μg/m3
Nitrogen Dioxide: 6.87 μg/m3
Sulphur Dioxide: 2.07 μg/m3
Ozone: 80.52 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:01 AM
Sunset: 5:05 PM
Daylight: 10 hrs 7 mins
Moonrise: 6:09 PM
Moon Transit: 12:19 AM
Moonset: 7:31 AM
Moon Phase: Full
Moon Illumination: 99.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:44 PM - 5:14 PM

Minor Periods

5:39 PM - 7:09 PM
7:01 AM - 8:31 AM

Action Rating: 5 out of 5

Tuesday, February 3, 2026

Weather Forecast

Sunny
30.2°F
15.6°F
23.9°F
70%
0 in
0%
0%
11.2 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 6.91 μg/m3
PM10: 7.1 μg/m3
Carbon Monoxide: 228.69 μg/m3
Nitrogen Dioxide: 10.41 μg/m3
Sulphur Dioxide: 2.67 μg/m3
Ozone: 72.64 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:01 AM
Sunset: 5:07 PM
Daylight: 10 hrs 9 mins
Moonrise: 7:20 PM
Moon Transit: 1:09 AM
Moonset: 7:57 AM
Moon Phase: Full
Moon Illumination: 96.3%

Best Times for Fishing or Hunting

Major Periods

12:39 AM - 3:09 AM
3:32 PM - 6:02 PM

Minor Periods

6:50 PM - 8:20 PM
7:27 AM - 8:57 AM

Action Rating: 4 out of 5

Wednesday, February 4, 2026

Weather Forecast

Overcast
30.1°F
14.3°F
25°F
76%
0 in
0%
0%
11.6 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 11.47 μg/m3
PM10: 11.49 μg/m3
Carbon Monoxide: 272.42 μg/m3
Nitrogen Dioxide: 23.47 μg/m3
Sulphur Dioxide: 4.57 μg/m3
Ozone: 49.72 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 12:01 AM
Sunset: 5:08 PM
Daylight: 10 hrs 12 mins
Moonrise: 8:28 PM
Moon Transit: 1:55 AM
Moonset: 8:19 AM
Moon Phase: Full
Moon Illumination: 90.9%

Best Times for Fishing or Hunting

Major Periods

1:25 AM - 3:55 AM
4:16 PM - 6:46 PM

Minor Periods

7:58 PM - 9:28 PM
7:49 AM - 9:19 AM

Action Rating: 3 out of 5

Thursday, February 5, 2026

Weather Forecast

Light freezing rain
27.2°F
10.3°F
18.5°F
81%
0.01 in
62%
16%
14.8 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.09 μg/m3
PM10: 3.09 μg/m3
Carbon Monoxide: 211.57 μg/m3
Nitrogen Dioxide: 5.74 μg/m3
Sulphur Dioxide: 1.7 μg/m3
Ozone: 67.77 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:01 AM
Sunset: 5:09 PM
Daylight: 10 hrs 14 mins
Moonrise: 9:34 PM
Moon Transit: 2:39 AM
Moonset: 8:40 AM
Moon Phase: Waning Gibbous
Moon Illumination: 83.4%

Best Times for Fishing or Hunting

Major Periods

2:09 AM - 4:39 AM
4:59 PM - 7:29 PM

Minor Periods

9:04 PM - 10:34 PM
8:10 AM - 9:40 AM

Action Rating: 3 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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