Water Temperature of the Mystic River in Mystic, CT

Current Water Temperature

49.3°F

Measurement Time: Monday, April 10, 2023, 5:24 AM EDT

Temperature Locations

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Local Points of Interest

Mystic Seaport

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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

18.2°F
Clear
Conditions: Clear
Humidity: 84%
Heat Index: 18.2°F
Feels Like: 10.4°F
Wind: N 3.1 mph
Wind Gusts: 7 mph
Wind Chill: 10.4°F
Air Pressure: 1021.96 millibars
Dew Point: 10.4°F
Chance of Precipitation: 0%
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 10 mi
UV Index: 0

Five Day Weather Forecast

Light freezing rain
Sat
H: 29°F
L: 18°F
Moderate or heavy snow showers
Sun
H: 37°F
L: 15°F
Heavy rain
Mon
H: 48°F
L: 37°F
Partly Cloudy
Tue
H: 34°F
L: 27°F
Partly Cloudy
Wed
H: 33°F
L: 26°F

Air Quality

AQI: 1 - Good
PM2.5: 4.95 μg/m3
PM10: 5.55 μg/m3
Carbon Monoxide: 326.85 μg/m3
Nitrogen Dioxide: 8.45 μg/m3
Sulphur Dioxide: 2.55 μg/m3
Ozone: 69 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:49 AM
Sunset: 4:26 PM
Daylight: 9 hrs 13 mins
Moonrise: 11:24 AM
Moon Transit: 4:23 AM
Moonset: 12:15 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%

Best Times for Fishing or Hunting

Major Periods

3:53 AM - 6:23 AM
3:53 AM - 6:23 AM

Minor Periods

10:54 AM - 12:24 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Special Weather Statement issued December 27 at 2:59PM EST by NWS Upton NY

Effective: Sat December 27, 2025, 2:59 PM
Expires: Sun December 28, 2025, 12:00 PM

Tonight, temperatures will be well below freezing and winds should remain on the lighter side, preventing some of the roads and other surfaces from drying out. Any existing areas of snowmelt could lead to black ice formation on area roadways, bridges, overpasses, and any untreated surfaces. Motorists and pedestrians should use caution. Reduce speed, allow extra time, and be prepared for areas of slippery travel Saturday evening through midday Sunday.


Winter Weather Advisory issued December 27 at 12:40PM EST until December 29 at 6:00AM EST by NWS Boston/Norton MA

Effective: Sat December 27, 2025, 12:40 PM
Expires: Sun December 28, 2025, 1:45 AM

* WHAT...Freezing rain expected. Total ice accumulations up to two tenths of an inch. Greatest amounts across western Massachusetts into the Merrimack River Valley in northeast MA. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, and western Massachusetts, and northern Rhode Island. * WHEN...From 7 PM Sunday to 6 AM EST Monday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Difficult travel conditions are possible. The hazardous conditions could impact the Monday morning commute, especially northwest of the I-95 corridor. * ADDITIONAL DETAILS...Longest duration of freezing rain and greatest impacts will be over western Massachusetts into the Merrimack River Valley of northeast MA.

Slow down and use caution while traveling. Prepare for possible power outages. Be prepared for slippery roads. Slow down and use caution while driving. If you are going outside, watch your first few steps taken on stairs, sidewalks, and driveways. These surfaces could be icy and slippery, increasing your risk of a fall and injury.


Saturday, December 27, 2025

Weather Forecast

Conditions: Light freezing rain
Average Temperature: 22.7°F
Average Humidity: 83%
Chance of Rain: 63%
Wind: 15.9 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 3.71 μg/m3
PM10: 4.26 μg/m3
Carbon Monoxide: 199.77 μg/m3
Nitrogen Dioxide: 8.06 μg/m3
Sulphur Dioxide: 2.19 μg/m3
Ozone: 70.04 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:49 AM
Sunset: 4:26 PM
Daylight: 9 hrs 13 mins
Moonrise: 11:24 AM
Moon Transit: 4:23 AM
Moonset: 12:15 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%

Best Times for Fishing or Hunting

Major Periods

3:53 AM - 6:23 AM
3:53 AM - 6:23 AM

Minor Periods

10:54 AM - 12:24 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, December 28, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 27.3°F
Average Humidity: 68%
Chance of Rain: 84%
Wind: 13.6 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 8.63 μg/m3
PM10: 9.07 μg/m3
Carbon Monoxide: 265.57 μg/m3
Nitrogen Dioxide: 15.52 μg/m3
Sulphur Dioxide: 3.66 μg/m3
Ozone: 60.24 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:49 AM
Sunset: 4:26 PM
Daylight: 9 hrs 13 mins
Moonrise: 11:47 AM
Moon Transit: 6:35 PM
Moonset: 12:26 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%

Best Times for Fishing or Hunting

Major Periods

8:10 AM - 10:40 AM
6:05 PM - 8:35 PM

Minor Periods

11:17 AM - 12:47 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, December 29, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 43.9°F
Average Humidity: 93%
Chance of Rain: 88%
Wind: 28.4 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 9.44 μg/m3
PM10: 11.72 μg/m3
Carbon Monoxide: 190.97 μg/m3
Nitrogen Dioxide: 12.09 μg/m3
Sulphur Dioxide: 2.92 μg/m3
Ozone: 60.08 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:50 AM
Sunset: 4:27 PM
Daylight: 9 hrs 14 mins
Moonrise: 12:13 AM
Moon Transit: 7:27 PM
Moonset: 1:39 AM
Moon Phase: First Quarter
Moon Illumination: 73.5%

Best Times for Fishing or Hunting

Major Periods

9:00 AM - 11:30 AM
6:57 PM - 9:27 PM

Minor Periods

11:43 AM - 1:13 PM
1:09 AM - 2:39 AM

Action Rating: 2 out of 5

Tuesday, December 30, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 30.1°F
Average Humidity: 66%
Chance of Rain: 0%
Wind: 27.7 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 3.07 μg/m3
PM10: 3.09 μg/m3
Carbon Monoxide: 169.79 μg/m3
Nitrogen Dioxide: 8.19 μg/m3
Sulphur Dioxide: 3.01 μg/m3
Ozone: 65 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 11:50 AM
Sunset: 4:28 PM
Daylight: 9 hrs 14 mins
Moonrise: 12:46 AM
Moon Transit: 8:24 PM
Moonset: 2:57 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

9:55 AM - 12:25 AM
7:54 PM - 10:24 PM

Minor Periods

12:16 AM - 1:46 PM
2:27 AM - 3:57 AM

Action Rating: 2 out of 5

Wednesday, December 31, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 30.5°F
Average Humidity: 64%
Chance of Rain: 0%
Wind: 23.9 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.6 μg/m3
PM10: 1.63 μg/m3
Carbon Monoxide: 152.47 μg/m3
Nitrogen Dioxide: 3.21 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 79 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 11:51 AM
Sunset: 4:29 PM
Daylight: 9 hrs 15 mins
Moonrise: 1:27 PM
Moon Transit: 9:27 PM
Moonset: 4:18 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%

Best Times for Fishing or Hunting

Major Periods

10:55 AM - 1:25 PM
8:57 PM - 11:27 PM

Minor Periods

12:57 AM - 2:27 PM
3:48 AM - 5:18 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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