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

32.2°F
Patchy light snow
Patchy light snow
21.3°F
30.7°F
100%
N 16.6 mph
25.1 mph
19.3°F
29.9°F
0.07 in
100%
0 mi
1009 mbar
0

Five Day Weather Forecast

Moderate rain
Sun
H: 37°F
L: 31°F
Blizzard
Mon
H: 30°F
L: 25°F
Light freezing rain
Tue
H: 25°F
L: 16°F
Partly Cloudy
Wed
H: 16°F
L: 7°F
Heavy snow
Thu
H: 27°F
L: 14°F

Air Quality

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 11:58 AM
Sunset: 4:47 PM
Daylight: 9 hrs 37 mins
Moonrise: 7:23 AM
Moon Transit: 11:55 AM
Moonset: 4:34 PM
Moon Phase: New
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
11:25 AM - 1:55 PM

Minor Periods

4:04 PM - 5:34 PM
6:53 AM - 8:23 AM

Action Rating: 4 out of 5

Winter Weather Advisory issued January 18 at 5:17AM EST until January 19 at 4:00AM EST by NWS Upton NY

Effective: Sun January 18, 2026, 5:17 AM
Expires: Sun January 18, 2026, 7:00 PM

* WHAT...Snow expected. Total snow accumulations between 3 and 5 inches. Isolated amounts up to 7 inches are possible in northern New London and northern Middlesex Counties. * WHERE...Portions of southern Connecticut and southeast New York. * WHEN...Until 4 AM EST Monday. * IMPACTS...Plan on slippery road conditions. * ADDITIONAL DETAILS...Precipitation may start off as a rain/snow mix at the coast. By late this afternoon all snow is expected. The bulk of the accumulation is expected to be after 5 pm today.

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


Winter Weather Advisory issued January 18 at 1:01PM EST until January 19 at 4:00AM EST by NWS Upton NY

Effective: Sun January 18, 2026, 1:01 PM
Expires: Mon January 19, 2026, 4:00 AM

* WHAT...Snow. Total snow accumulations between 3 and 5 inches. * WHERE...Portions of southern Connecticut and southeastern New York. * WHEN...Until 4 AM EST Monday. * IMPACTS...Plan on slippery road conditions.

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


Winter Weather Advisory issued January 18 at 1:17PM EST until January 19 at 7:00AM EST by NWS Boston/Norton MA

Effective: Sun January 18, 2026, 1:17 PM
Expires: Mon January 19, 2026, 7:00 AM

* WHAT...Snow. Additional snow accumulations between 2 and 5 inches. * WHERE...Portions of southeastern Massachusetts and Rhode Island. * WHEN...Until 7 AM EST Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Monday morning commute.

Slow down and use caution while traveling.


Winter Weather Advisory issued January 18 at 1:17PM EST until January 19 at 7:00AM EST by NWS Boston/Norton MA

Effective: Sun January 18, 2026, 1:17 PM
Expires: Mon January 19, 2026, 7:00 AM

* WHAT...Snow. Additional snow accumulations between 2 and 4 inches. * WHERE...Portions of central and northern Connecticut. * WHEN...Until 7 AM EST Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Monday morning commute.

Slow down and use caution while traveling.
Sunday, January 18, 2026

Weather Forecast

Moderate rain
36.5°F
30.5°F
33.9°F
85%
0.42 in
87%
21%
19 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 9.3 μg/m3
PM10: 11.47 μg/m3
Carbon Monoxide: 204.72 μg/m3
Nitrogen Dioxide: 12.03 μg/m3
Sulphur Dioxide: 5.84 μg/m3
Ozone: 51.77 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 11:58 AM
Sunset: 4:47 PM
Daylight: 9 hrs 37 mins
Moonrise: 7:23 AM
Moon Transit: 11:55 AM
Moonset: 4:34 PM
Moon Phase: New
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
11:25 AM - 1:55 PM

Minor Periods

4:04 PM - 5:34 PM
6:53 AM - 8:23 AM

Action Rating: 4 out of 5

Monday, January 19, 2026

Weather Forecast

Blizzard
30.2°F
25.2°F
27.8°F
86%
1.16 in
86%
50%
28.9 mph
0


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 11:58 AM
Sunset: 4:48 PM
Daylight: 9 hrs 39 mins
Moonrise: 7:55 AM
Moon Transit: 12:44 AM
Moonset: 5:42 PM
Moon Phase: New
Moon Illumination: 0.4%

Best Times for Fishing or Hunting

Major Periods

2:19 AM - 4:49 AM
12:14 AM - 2:44 PM

Minor Periods

5:12 PM - 6:42 PM
7:25 AM - 8:55 AM

Action Rating: 5 out of 5

Tuesday, January 20, 2026

Weather Forecast

Light freezing rain
25.3°F
16.1°F
22.1°F
74%
0.02 in
65%
37%
19.2 mph
1


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 11:58 AM
Sunset: 4:49 PM
Daylight: 9 hrs 41 mins
Moonrise: 8:23 AM
Moon Transit: 1:32 PM
Moonset: 6:51 PM
Moon Phase: New
Moon Illumination: 3.1%

Best Times for Fishing or Hunting

Major Periods

3:07 AM - 5:37 AM
1:02 PM - 3:32 PM

Minor Periods

6:21 PM - 7:51 PM
7:53 AM - 9:23 AM

Action Rating: 3 out of 5

Wednesday, January 21, 2026

Weather Forecast

Partly Cloudy
16°F
6.8°F
11.5°F
75%
0 in
0%
18%
17.7 mph
2


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:00 AM
Sunset: 4:51 PM
Daylight: 9 hrs 43 mins
Moonrise: 8:46 AM
Moon Transit: 2:17 PM
Moonset: 7:59 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.1%

Best Times for Fishing or Hunting

Major Periods

3:53 AM - 6:23 AM
1:47 PM - 4:17 PM

Minor Periods

7:29 PM - 8:59 PM
8:16 AM - 9:46 AM

Action Rating: 2 out of 5

Thursday, January 22, 2026

Weather Forecast

Heavy snow
27.1°F
14.2°F
20.3°F
86%
0.06 in
88%
48%
10.5 mph
1


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:00 AM
Sunset: 4:52 PM
Daylight: 9 hrs 44 mins
Moonrise: 9:08 AM
Moon Transit: 12:00 AM
Moonset: 9:07 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
4:38 AM - 7:08 AM

Minor Periods

8:37 PM - 10:07 PM
8:38 AM - 10:08 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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