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

36°F
Mist
Mist
34.9°F
36.9°F
96%
NNW 2.2 mph
4.2 mph
32.9°F
36.1°F
0.05 in
100%
1 mi
1003 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Wed
H: 45°F
L: 34°F
Sunny
Thu
H: 44°F
L: 33°F
Patchy rain nearby
Fri
H: 42°F
L: 32°F
Moderate rain
Sat
H: 46°F
L: 40°F
Moderate rain
Sun
H: 46°F
L: 39°F

Air Quality

AQI: 1 - Good
PM2.5: 17.85 μg/m3
PM10: 18.15 μg/m3
Carbon Monoxide: 303.85 μg/m3
Nitrogen Dioxide: 27.25 μg/m3
Sulphur Dioxide: 6.55 μg/m3
Ozone: 26 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 11:54 AM
Sunset: 4:35 PM
Daylight: 9 hrs 21 mins
Moonrise: 9:41 PM
Moon Transit: 3:21 AM
Moonset: 9:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

2:51 AM - 5:21 AM
5:42 PM - 8:12 PM

Minor Periods

9:11 PM - 10:41 PM
9:27 AM - 10:57 AM

Action Rating: 2 out of 5

Winter Weather Advisory issued January 6 at 1:01PM EST until January 7 at 7:00AM EST by NWS Upton NY

Effective: Tue January 6, 2026, 1:01 PM
Expires: Wed January 7, 2026, 7:00 AM

* WHAT...Freezing rain expected. Ice accumulation around a light glaze. * WHERE...Portions of southern Connecticut and southeast New York. * WHEN...From 7 PM this evening to 7 AM EST Wednesday. * IMPACTS...Slippery sidewalks, roads and bridges are possible.

Slow down and use caution while traveling. Check local Department of Transportation information services for the latest road conditions.


Winter Weather Advisory issued January 7 at 12:32AM EST until January 7 at 10:00AM EST by NWS Boston/Norton MA

Effective: Wed January 7, 2026, 12:32 AM
Expires: Wed January 7, 2026, 10:00 AM

* WHAT...Freezing rain. Additional ice accumulations around one tenth of an inch across interior areas of southern New England, while a trace of ice along the coastal plain and I-95 corridor. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern Rhode Island. * WHEN...Until 10 AM EST this morning. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Difficult travel conditions are possible. The hazardous conditions could impact the Wednesday morning commute.

Slow down and use caution while traveling. Prepare for possible power outages.
Wednesday, January 7, 2026

Weather Forecast

Patchy rain nearby
44.8°F
33.7°F
38.3°F
91%
0.13 in
86%
0%
14.8 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 12.34 μg/m3
PM10: 14.99 μg/m3
Carbon Monoxide: 269.65 μg/m3
Nitrogen Dioxide: 12.4 μg/m3
Sulphur Dioxide: 3.68 μg/m3
Ozone: 47.84 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 11:54 AM
Sunset: 4:35 PM
Daylight: 9 hrs 21 mins
Moonrise: 9:41 PM
Moon Transit: 3:21 AM
Moonset: 9:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

2:51 AM - 5:21 AM
5:42 PM - 8:12 PM

Minor Periods

9:11 PM - 10:41 PM
9:27 AM - 10:57 AM

Action Rating: 2 out of 5

Thursday, January 8, 2026

Weather Forecast

Sunny
43.9°F
32.5°F
37°F
82%
0 in
0%
0%
11.4 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 4.59 μg/m3
PM10: 4.63 μg/m3
Carbon Monoxide: 275.85 μg/m3
Nitrogen Dioxide: 13.33 μg/m3
Sulphur Dioxide: 3.35 μg/m3
Ozone: 41.6 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 11:54 AM
Sunset: 4:36 PM
Daylight: 9 hrs 23 mins
Moonrise: 10:47 PM
Moon Transit: 4:05 AM
Moonset: 10:18 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

3:35 AM - 6:05 AM
6:24 PM - 8:54 PM

Minor Periods

10:17 PM - 11:47 PM
9:48 AM - 11:18 AM

Action Rating: 2 out of 5

Friday, January 9, 2026

Weather Forecast

Patchy rain nearby
41.8°F
32°F
38°F
98%
0.17 in
75%
0%
17.9 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 11.64 μg/m3
PM10: 13.99 μg/m3
Carbon Monoxide: 290.13 μg/m3
Nitrogen Dioxide: 29.03 μg/m3
Sulphur Dioxide: 3.19 μg/m3
Ozone: 32.92 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:55 AM
Sunset: 4:37 PM
Daylight: 9 hrs 24 mins
Moonrise: 11:50 PM
Moon Transit: 4:47 AM
Moonset: 10:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 57.8%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
7:06 PM - 9:36 PM

Minor Periods

12:00 AM - 12:00 AM
10:07 AM - 11:37 AM

Action Rating: 3 out of 5

Saturday, January 10, 2026

Weather Forecast

Moderate rain
45.5°F
39.5°F
43.4°F
98%
0.72 in
89%
0%
17.2 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 8.93 μg/m3
PM10: 10.17 μg/m3
Carbon Monoxide: 246.11 μg/m3
Nitrogen Dioxide: 13.69 μg/m3
Sulphur Dioxide: 3.27 μg/m3
Ozone: 49 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:55 AM
Sunset: 4:38 PM
Daylight: 9 hrs 25 mins
Moonrise: 12:50 AM
Moon Transit: 5:28 AM
Moonset: 10:57 AM
Moon Phase: Last Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

4:58 AM - 7:28 AM
7:47 PM - 10:17 PM

Minor Periods

10:27 AM - 11:57 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Sunday, January 11, 2026

Weather Forecast

Moderate rain
46.3°F
38.5°F
42.2°F
98%
0.48 in
76%
0%
14.8 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 5.83 μg/m3
PM10: 7.58 μg/m3
Carbon Monoxide: 181.33 μg/m3
Nitrogen Dioxide: 5.63 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 64.38 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:55 AM
Sunset: 4:39 PM
Daylight: 9 hrs 26 mins
Moonrise: 12:53 AM
Moon Transit: 6:10 AM
Moonset: 11:19 AM
Moon Phase: Last Quarter
Moon Illumination: 35.3%

Best Times for Fishing or Hunting

Major Periods

5:40 AM - 8:10 AM
8:30 PM - 11:00 PM

Minor Periods

10:49 AM - 12:19 AM
12:23 AM - 1:53 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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