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 / 0 meters

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

GPS Coordinates: 41.3614722, -71.96727778

Nearby Water Temperatures

Mystic Harbor, Mystic, CT (1.0 mi)
Mystic River, Old Mystic, CT (1.1 mi)
Mystic River, Noank, CT (2.5 mi)
Thames River, Groton, CT (6.0 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

61°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 78%
Feels Like: 61°F
Wind: N 11.6 mph
Wind Gusts: 15.8 mph
Pressure: 29.95 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0.5

Five Day Weather Forecast

Sunny
Wed
H: 70°F
L: 52°F
Sunny
Thu
H: 59°F
L: 46°F
Sunny
Fri
H: 57°F
L: 42°F
Partly Cloudy
Sat
H: 64°F
L: 55°F
Moderate rain
Sun
H: 59°F
L: 55°F

Air Quality

AQI: 1 - Good
PM2.5: 2.85 μg/m3
PM10: 2.85 μg/m3
Carbon Monoxide: 198.85 μg/m3
Nitrogen Dioxide: 4.25 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 76 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:35 AM
Sunset: 6:18 PM
Daylight: 11 hrs 25 mins
Moonrise: 6:56 PM
Moon Transit: 1:26 AM
Moonset: 8:43 AM
Moon Phase: Full
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

12:56 AM - 3:26 AM
3:54 PM - 6:24 PM

Minor Periods

6:26 PM - 7:56 PM
8:13 AM - 9:43 AM

Action Rating: 5 out of 5

Freeze Watch issued October 8 at 2:40AM EDT until October 10 at 9:00AM EDT by NWS Upton NY

Effective: Wed October 8, 2025, 2:40 AM
Expires: Wed October 8, 2025, 4:00 PM

* WHAT...Sub-freezing temperatures as low as 28 possible. * WHERE...In Connecticut, Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. In New Jersey, Western Passaic County. In New York, Northern Westchester, Orange, Putnam, and Rockland Counties. * WHEN...From late Thursday night through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation.

Take steps now to protect tender plants from the cold.


Freeze Watch issued October 8 at 1:45PM EDT until October 10 at 9:00AM EDT by NWS Upton NY

Effective: Wed October 8, 2025, 1:45 PM
Expires: Thu October 9, 2025, 4:00 AM

* WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...In Connecticut, Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. In New Jersey, Western Passaic County. In New York, Northern Westchester, Orange, Putnam, and Rockland Counties. * WHEN...From late Thursday night through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation.

Take steps now to protect tender plants from the cold.


Freeze Watch issued October 8 at 12:10PM EDT until October 10 at 9:00AM EDT by NWS Boston/Norton MA

Effective: Wed October 8, 2025, 12:10 PM
Expires: Thu October 9, 2025, 6:00 AM

* WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Providence County, Kent County, Dukes MA, Bristol RI, Washington RI, and Newport RI. * WHEN...From Thursday evening through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...The lowest temperatures are expected away from the immediate coastline.

Take steps now to protect tender plants from the cold.


Freeze Watch issued October 8 at 3:06AM EDT until October 10 at 9:00AM EDT by NWS Boston/Norton MA

Effective: Wed October 8, 2025, 3:06 AM
Expires: Wed October 8, 2025, 4:30 PM

* WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Portions of northern Connecticut and central, eastern, southeastern, and southwestern Massachusetts. * WHEN...From Thursday evening through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Watch issued October 8 at 12:10PM EDT until October 10 at 9:00AM EDT by NWS Boston/Norton MA

Effective: Wed October 8, 2025, 12:10 PM
Expires: Thu October 9, 2025, 6:00 AM

* WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Portions of northern Connecticut and central, eastern, southeastern, and western Massachusetts. * WHEN...From Thursday evening through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...The lowest temperatures are expected away from the immediate coastline.

Take steps now to protect tender plants from the cold.
Wednesday, October 8, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 65.9°F
Average Humidity: 77%
Chance of Rain: 0%
Wind: 22.1 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 5.31 μg/m3
PM10: 7.43 μg/m3
Carbon Monoxide: 143.81 μg/m3
Nitrogen Dioxide: 3.12 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 77.88 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:35 AM
Sunset: 6:18 PM
Daylight: 11 hrs 25 mins
Moonrise: 6:56 PM
Moon Transit: 1:26 AM
Moonset: 8:43 AM
Moon Phase: Full
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

12:56 AM - 3:26 AM
3:54 PM - 6:24 PM

Minor Periods

6:26 PM - 7:56 PM
8:13 AM - 9:43 AM

Action Rating: 5 out of 5

Thursday, October 9, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 52.8°F
Average Humidity: 51%
Chance of Rain: 0%
Wind: 16.1 mph
UV Index: 0.9

Air Quality

AQI: 1 - Good
PM2.5: 2.5 μg/m3
PM10: 2.53 μg/m3
Carbon Monoxide: 148.97 μg/m3
Nitrogen Dioxide: 3.19 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 74.88 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:35 AM
Sunset: 6:16 PM
Daylight: 11 hrs 23 mins
Moonrise: 7:32 PM
Moon Transit: 2:22 AM
Moonset: 10:05 AM
Moon Phase: Waning Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

1:52 AM - 4:22 AM
4:53 PM - 7:23 PM

Minor Periods

7:02 PM - 8:32 PM
9:35 AM - 11:05 AM

Action Rating: 2 out of 5

Friday, October 10, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 50.5°F
Average Humidity: 56%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 0.9

Air Quality

AQI: 1 - Good
PM2.5: 3.41 μg/m3
PM10: 3.99 μg/m3
Carbon Monoxide: 168.09 μg/m3
Nitrogen Dioxide: 4.19 μg/m3
Sulphur Dioxide: 2.07 μg/m3
Ozone: 79.88 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:34 AM
Sunset: 6:14 PM
Daylight: 11 hrs 20 mins
Moonrise: 8:19 PM
Moon Transit: 3:23 AM
Moonset: 11:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 82.3%

Best Times for Fishing or Hunting

Major Periods

2:53 AM - 5:23 AM
5:55 PM - 8:25 PM

Minor Periods

7:49 PM - 9:19 PM
10:56 AM - 12:26 AM

Action Rating: 3 out of 5

Saturday, October 11, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 57.5°F
Average Humidity: 70%
Chance of Rain: 0%
Wind: 9.2 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 6.7 μg/m3
PM10: 9.59 μg/m3
Carbon Monoxide: 196.45 μg/m3
Nitrogen Dioxide: 2.13 μg/m3
Sulphur Dioxide: 1.34 μg/m3
Ozone: 89.8 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 12:34 AM
Sunset: 6:13 PM
Daylight: 11 hrs 17 mins
Moonrise: 9:16 PM
Moon Transit: 4:26 AM
Moonset: 12:41 AM
Moon Phase: Waning Gibbous
Moon Illumination: 72.9%

Best Times for Fishing or Hunting

Major Periods

3:56 AM - 6:26 AM
6:59 PM - 9:29 PM

Minor Periods

8:46 PM - 10:16 PM
12:11 AM - 1:41 PM

Action Rating: 3 out of 5

Sunday, October 12, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 56.5°F
Average Humidity: 84%
Chance of Rain: 86%
Wind: 36 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 5.85 μg/m3
PM10: 8.49 μg/m3
Carbon Monoxide: 175.39 μg/m3
Nitrogen Dioxide: 2.85 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 81.92 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:34 AM
Sunset: 6:11 PM
Daylight: 11 hrs 14 mins
Moonrise: 10:23 PM
Moon Transit: 5:30 AM
Moonset: 1:43 PM
Moon Phase: Waning Gibbous
Moon Illumination: 62.3%

Best Times for Fishing or Hunting

Major Periods

5:00 AM - 7:30 AM
8:02 PM - 10:32 PM

Minor Periods

9:53 PM - 11:23 PM
1:13 PM - 2:43 PM

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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