Water Temperature of the Mystic River in Mystic, CT

Current Water Temperature

49.3°F

Measurement Time: Monday, April 10, 2023, 5:18 AM EDT

Temperature Locations

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Local Points of Interest

Mystic Seaport

Mystic River

Station Name: MYSTIC RIVER AT MYSTIC SEAPORT NEAR MYSTIC, CT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet

Nearest Address:
93 Pearl St
Mystic, CT 06355
New London County

GPS Coordinates: 41.3614722, -71.96727778

Nearby Water Temperatures

Mystic Harbor, Mystic, CT (1 mi)
Mystic River, Old Mystic, CT (1.1 mi)
Mystic River, Noank, CT (2.5 mi)
Thames River, Groton, CT (6 mi)
Thames River, New London, CT (6.7 mi)
Pawcatuck River, Westerly, RI (7.1 mi)
Yantic River, Norwich, CT (15.8 mi)
East Branch Eightmile River, Lyme, CT (19.6 mi)
Eightmile River, East Haddam, CT (19.7 mi)
Connecticut River, Old Lyme, CT (19.9 mi)
Fort Pond Bay, Montauk, NY (21.6 mi)
Orient Harbor, Orient, NY (23.5 mi)
Natchaug River, Chaplin, CT (32.2 mi)
Wilbur Hollow Brook, Clayville, RI (32.7 mi)
Hemlock Brook, Foster, RI (32.7 mi)

Weather for Mystic, Connecticut

Current Weather

39.9°F
Overcast
Overcast
33.4°F
39°F
44%
N 10.3 mph
16.6 mph
33.3°F
28.6°F
0 in
100%
9 mi
1025 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 50°F
L: 33°F
Sunny
Tue
H: 46°F
L: 32°F
Patchy rain nearby
Wed
H: 45°F
L: 40°F
Partly Cloudy
Thu
H: 58°F
L: 40°F
Sunny
Fri
H: 54°F
L: 38°F

Air Quality

AQI: 1 - Good
PM2.5: 5.85 μg/m3
PM10: 6.45 μg/m3
Carbon Monoxide: 161.85 μg/m3
Nitrogen Dioxide: 6.55 μg/m3
Sulphur Dioxide: 2.05 μg/m3
Ozone: 80 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 12:46 AM
Sunset: 7:33 PM
Daylight: 13 hrs 33 mins
Moonrise: 7:46 AM
Moon Transit: 3:53 PM
Moonset: 12:07 PM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
3:23 PM - 5:53 PM

Minor Periods

12:00 AM - 12:00 AM
7:16 AM - 8:46 AM

Action Rating: 2 out of 5

Freeze Warning issued April 20 at 1:57PM EDT until April 21 at 9:00AM EDT by NWS Upton NY

Effective: Mon April 20, 2026, 1:57 PM
Expires: Tue April 21, 2026, 9:00 AM

* WHAT...Sub freezing temperatures in the 20s and lower 30s expected. * WHERE...All of southern Connecticut, and most of northeast New Jersey and southeast New York. * WHEN...From midnight tonight to 9 AM EDT Tuesday. * IMPACTS...Freeze and frost conditions could kill crops and other sensitive vegetation.

Take steps now to protect tender plants from the cold.
Monday, April 20, 2026

Weather Forecast

Patchy rain nearby
50.4°F
32.7°F
41.6°F
69%
0.08 in
75%
0%
11.6 mph
4.9


Air Quality

AQI: 1 - Good
PM2.5: 6.01 μg/m3
PM10: 6.47 μg/m3
Carbon Monoxide: 196.09 μg/m3
Nitrogen Dioxide: 6.91 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 84.44 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 12:46 AM
Sunset: 7:33 PM
Daylight: 13 hrs 33 mins
Moonrise: 7:46 AM
Moon Transit: 3:53 PM
Moonset: 12:07 PM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
3:23 PM - 5:53 PM

Minor Periods

12:00 AM - 12:00 AM
7:16 AM - 8:46 AM

Action Rating: 2 out of 5

Tuesday, April 21, 2026

Weather Forecast

Sunny
45.7°F
32.4°F
39.9°F
59%
0 in
0%
0%
12.1 mph
5.9


Air Quality

AQI: 1 - Good
PM2.5: 5.55 μg/m3
PM10: 6.42 μg/m3
Carbon Monoxide: 191.01 μg/m3
Nitrogen Dioxide: 4.93 μg/m3
Sulphur Dioxide: 2 μg/m3
Ozone: 93.6 μg/m3

Astronomical

Sunrise: 5:59 AM
Sun Transit: 12:46 AM
Sunset: 7:35 PM
Daylight: 13 hrs 35 mins
Moonrise: 8:46 AM
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 AM
4:28 PM - 6:58 PM

Minor Periods

8:16 AM - 9:46 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, April 22, 2026

Weather Forecast

Patchy rain nearby
44.6°F
39.8°F
42.7°F
86%
0.17 in
87%
0%
15 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 10.39 μg/m3
PM10: 14.83 μg/m3
Carbon Monoxide: 169.61 μg/m3
Nitrogen Dioxide: 3.51 μg/m3
Sulphur Dioxide: 1.56 μg/m3
Ozone: 106 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 12:46 AM
Sunset: 7:36 PM
Daylight: 13 hrs 38 mins
Moonrise: 9:56 AM
Moon Transit: 6:01 PM
Moonset: 1:08 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%

Best Times for Fishing or Hunting

Major Periods

7:31 AM - 10:01 AM
5:31 PM - 8:01 PM

Minor Periods

9:26 AM - 10:56 AM
12:38 AM - 2:08 AM

Action Rating: 3 out of 5

Thursday, April 23, 2026

Weather Forecast

Partly Cloudy
57.6°F
39.7°F
48.4°F
75%
0 in
0%
0%
13 mph
5.2


Air Quality

AQI: 2 - Moderate
PM2.5: 16.83 μg/m3
PM10: 21.85 μg/m3
Carbon Monoxide: 172.1 μg/m3
Nitrogen Dioxide: 10.83 μg/m3
Sulphur Dioxide: 1.77 μg/m3
Ozone: 82.48 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 12:46 AM
Sunset: 7:37 PM
Daylight: 13 hrs 41 mins
Moonrise: 11:10 AM
Moon Transit: 7:00 PM
Moonset: 1:57 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%

Best Times for Fishing or Hunting

Major Periods

8:31 AM - 11:01 AM
6:30 PM - 9:00 PM

Minor Periods

10:40 AM - 12:10 AM
1:27 AM - 2:57 AM

Action Rating: 2 out of 5

Friday, April 24, 2026

Weather Forecast

Sunny
54.3°F
38.2°F
45.9°F
58%
0 in
0%
0%
10.5 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 10.01 μg/m3
PM10: 10.93 μg/m3
Carbon Monoxide: 217.75 μg/m3
Nitrogen Dioxide: 11.07 μg/m3
Sulphur Dioxide: 2.4 μg/m3
Ozone: 77.38 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 12:46 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%

Best Times for Fishing or Hunting

Major Periods

9:25 AM - 11:55 AM
7:22 PM - 9:52 PM

Minor Periods

11:56 AM - 1:26 PM
2:06 AM - 3:36 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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