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

51.1°F
Sunny
Conditions: Sunny
Humidity: 50%
Feels Like: 45.6°F
Wind: SSW 16.8 mph
Wind Gusts: 21.3 mph
Pressure: 30.03 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 2

Five Day Weather Forecast

Sunny
Fri
H: 58°F
L: 34°F
Moderate rain
Sat
H: 62°F
L: 53°F
Fog
Sun
H: 58°F
L: 50°F
Moderate rain
Mon
H: 57°F
L: 40°F
Sunny
Tue
H: 42°F
L: 33°F

Air Quality

AQI: 1 - Good
PM2.5: 5.65 μg/m3
PM10: 7.95 μg/m3
Carbon Monoxide: 145.85 μg/m3
Nitrogen Dioxide: 2.15 μg/m3
Sulphur Dioxide: 2.05 μg/m3
Ozone: 94 μg/m3

Astronomical

Sunrise: 6:27 AM
Sun Transit: 11:31 AM
Sunset: 4:36 PM
Daylight: 10 hrs 9 mins
Moonrise: 6:02 PM
Moon Transit: 1:08 AM
Moonset: 9:18 AM
Moon Phase: Full
Moon Illumination: 93.4%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
3:42 PM - 6:12 PM

Minor Periods

5:32 PM - 7:02 PM
8:48 AM - 10:18 AM

Action Rating: 3 out of 5

Frost Advisory issued November 7 at 3:09AM EST until November 7 at 8:00AM EST by NWS Upton NY

Effective: Fri November 7, 2025, 3:09 AM
Expires: Fri November 7, 2025, 8:00 AM

* WHAT...Temperatures as low as 30 will result in frost formation. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...Until 8 AM EST this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.
Friday, November 7, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 46.2°F
Average Humidity: 64%
Chance of Rain: 0%
Wind: 23 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 3.21 μg/m3
PM10: 4.06 μg/m3
Carbon Monoxide: 163.89 μg/m3
Nitrogen Dioxide: 3.45 μg/m3
Sulphur Dioxide: 2.1 μg/m3
Ozone: 80.76 μg/m3

Astronomical

Sunrise: 6:27 AM
Sun Transit: 11:31 AM
Sunset: 4:36 PM
Daylight: 10 hrs 9 mins
Moonrise: 6:02 PM
Moon Transit: 1:08 AM
Moonset: 9:18 AM
Moon Phase: Full
Moon Illumination: 93.4%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
3:42 PM - 6:12 PM

Minor Periods

5:32 PM - 7:02 PM
8:48 AM - 10:18 AM

Action Rating: 3 out of 5

Saturday, November 8, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 56.2°F
Average Humidity: 85%
Chance of Rain: 87%
Wind: 21.7 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 5.75 μg/m3
PM10: 6.86 μg/m3
Carbon Monoxide: 177.09 μg/m3
Nitrogen Dioxide: 5.37 μg/m3
Sulphur Dioxide: 2.67 μg/m3
Ozone: 84.08 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 11:31 AM
Sunset: 4:35 PM
Daylight: 10 hrs 6 mins
Moonrise: 7:07 PM
Moon Transit: 2:14 AM
Moonset: 10:29 AM
Moon Phase: Waning Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

1:44 AM - 4:14 AM
4:48 PM - 7:18 PM

Minor Periods

6:37 PM - 8:07 PM
9:59 AM - 11:29 AM

Action Rating: 3 out of 5

Sunday, November 9, 2025

Weather Forecast

Conditions: Fog
Average Temperature: 54°F
Average Humidity: 91%
Chance of Rain: 0%
Wind: 8.1 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 6.13 μg/m3
PM10: 8.24 μg/m3
Carbon Monoxide: 182.61 μg/m3
Nitrogen Dioxide: 5.46 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 68.56 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 11:31 AM
Sunset: 4:34 PM
Daylight: 10 hrs 4 mins
Moonrise: 8:21 PM
Moon Transit: 3:19 AM
Moonset: 11:25 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

2:49 AM - 5:19 AM
5:51 PM - 8:21 PM

Minor Periods

7:51 PM - 9:21 PM
10:55 AM - 12:25 AM

Action Rating: 2 out of 5

Monday, November 10, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 51.7°F
Average Humidity: 82%
Chance of Rain: 81%
Wind: 17.9 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 6.65 μg/m3
PM10: 7.57 μg/m3
Carbon Monoxide: 192.81 μg/m3
Nitrogen Dioxide: 7.92 μg/m3
Sulphur Dioxide: 3.32 μg/m3
Ozone: 75.64 μg/m3

Astronomical

Sunrise: 6:31 AM
Sun Transit: 11:31 AM
Sunset: 4:33 PM
Daylight: 10 hrs 2 mins
Moonrise: 9:36 PM
Moon Transit: 4:20 AM
Moonset: 12:09 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

3:50 AM - 6:20 AM
6:48 PM - 9:18 PM

Minor Periods

9:06 PM - 10:36 PM
11:39 AM - 1:09 PM

Action Rating: 3 out of 5

Tuesday, November 11, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 36.9°F
Average Humidity: 64%
Chance of Rain: 0%
Wind: 21.7 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 2.87 μg/m3
PM10: 2.92 μg/m3
Carbon Monoxide: 188.23 μg/m3
Nitrogen Dioxide: 6.2 μg/m3
Sulphur Dioxide: 2.17 μg/m3
Ozone: 56.62 μg/m3

Astronomical

Sunrise: 6:32 AM
Sun Transit: 11:31 AM
Sunset: 4:32 PM
Daylight: 10 hrs mins
Moonrise: 10:49 PM
Moon Transit: 5:15 AM
Moonset: 12:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 57.1%

Best Times for Fishing or Hunting

Major Periods

4:45 AM - 7:15 AM
7:40 PM - 10:10 PM

Minor Periods

10:19 PM - 11:49 PM
12:13 AM - 1:43 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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