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

79°F
Mist
Conditions: Mist
Humidity: 69%
Feels Like: 84.9°F
Wind: SE 6.9 mph
Wind Gusts: 8.9 mph
Pressure: 30.3 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 2.8

Five Day Weather Forecast

Mist
Tue
H: 78°F
L: 62°F
Cloudy
Wed
H: 76°F
L: 64°F
Cloudy
Thu
H: 73°F
L: 64°F
Sunny
Fri
H: 74°F
L: 63°F
Sunny
Sat
H: 77°F
L: 64°F

Air Quality

AQI: 1 - Good
PM2.5: 25.72 μg/m3
PM10: 30.16 μg/m3
Carbon Monoxide: 556.85 μg/m3
Nitrogen Dioxide: 23.5 μg/m3
Sulphur Dioxide: 2.22 μg/m3
Ozone: 105 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 12:53 AM
Sunset: 8:00 PM
Daylight: 14 hrs 13 mins
Moonrise: 5:55 PM
Moon Transit: 10:09 PM
Moonset: 1:29 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 88.0%

Best Times for Fishing or Hunting

Major Periods

11:42 AM - 2:12 PM
12:00 AM - 12:00 AM

Minor Periods

5:25 PM - 6:55 PM
12:59 AM - 2:29 AM

Action Rating: 2 out of 5

Air Quality Alert issued August 5 at 12:35AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue August 5, 2025, 12:35 AM
Expires: Tue August 5, 2025, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex. until 11 PM EDT this evening. An Air Quality Action Day means that Ground Level Ozone and Fine Particulates within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued August 5 at 12:35AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue August 5, 2025, 12:35 AM
Expires: Tue August 5, 2025, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex. until 11 PM EDT this evening. An Air Quality Action Day means that Ground Level Ozone and Fine Particulates within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued August 5 at 9:54AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue August 5, 2025, 9:54 AM
Expires: Wed August 6, 2025, 12:00 AM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex. until 11 PM EDT this evening. An Air Quality Action Day means that Ground Level Ozone and Fine Particulates within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued August 5 at 1:26AM EDT by NWS Boston/Norton MA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue August 5, 2025, 1:26 AM
Expires: Tue August 5, 2025, 11:15 PM

The Connecticut Department of Environmental Protection has issued an Air Quality Action Day for Fine Particulates, from 11 AM this morning to 11 PM EDT this evening. An Air Quality Action day means that Fine Particulates concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection website at: https://portal.ct.gov/deep


Air Quality Alert issued August 5 at 7:22AM EDT by NWS Boston/Norton MA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue August 5, 2025, 7:22 AM
Expires: Tue August 5, 2025, 11:15 PM

The Connecticut Department of Environmental Protection has issued an Air Quality Action Day for Fine Particulates, from 11 AM this morning to 11 PM EDT this evening. An Air Quality Action day means that Fine Particulates concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection website at: https://portal.ct.gov/deep


Tuesday, August 5, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 69°F
Average Humidity: 92%
Chance of Rain: 0%
Wind: 8.7 mph
UV Index: 1.8

Air Quality

AQI: 2 - Moderate
PM2.5: 35.72 μg/m3
PM10: 38.81 μg/m3
Carbon Monoxide: 547.9 μg/m3
Nitrogen Dioxide: 17.13 μg/m3
Sulphur Dioxide: 3.34 μg/m3
Ozone: 131.92 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 12:53 AM
Sunset: 8:00 PM
Daylight: 14 hrs 13 mins
Moonrise: 5:55 PM
Moon Transit: 10:09 PM
Moonset: 1:29 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 88.0%

Best Times for Fishing or Hunting

Major Periods

11:42 AM - 2:12 PM
12:00 AM - 12:00 AM

Minor Periods

5:25 PM - 6:55 PM
12:59 AM - 2:29 AM

Action Rating: 2 out of 5

Wednesday, August 6, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 69.2°F
Average Humidity: 75%
Chance of Rain: 0%
Wind: 10.7 mph
UV Index: 1.3

Air Quality

AQI: 2 - Moderate
PM2.5: 40.29 μg/m3
PM10: 44.4 μg/m3
Carbon Monoxide: 486.7 μg/m3
Nitrogen Dioxide: 14.83 μg/m3
Sulphur Dioxide: 2.91 μg/m3
Ozone: 95.12 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 12:53 AM
Sunset: 7:59 PM
Daylight: 14 hrs 10 mins
Moonrise: 6:43 PM
Moon Transit: 11:04 PM
Moonset: 2:26 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 94.4%

Best Times for Fishing or Hunting

Major Periods

12:37 AM - 3:07 PM
12:00 AM - 12:00 AM

Minor Periods

6:13 PM - 7:43 PM
1:56 AM - 3:26 AM

Action Rating: 3 out of 5

Thursday, August 7, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 68.2°F
Average Humidity: 70%
Chance of Rain: 0%
Wind: 9.8 mph
UV Index: 1.3

Air Quality

AQI: 2 - Moderate
PM2.5: 19.39 μg/m3
PM10: 24.28 μg/m3
Carbon Monoxide: 373.7 μg/m3
Nitrogen Dioxide: 6.65 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 74.88 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 12:53 AM
Sunset: 7:57 PM
Daylight: 14 hrs 8 mins
Moonrise: 7:23 PM
Moon Transit: 11:58 PM
Moonset: 3:30 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.4%

Best Times for Fishing or Hunting

Major Periods

1:31 PM - 4:01 PM
12:00 AM - 12:00 AM

Minor Periods

6:53 PM - 8:23 PM
3:00 AM - 4:30 AM

Action Rating: 3 out of 5

Friday, August 8, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 68.3°F
Average Humidity: 66%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 2

Air Quality

AQI: 1 - Good
PM2.5: 12.78 μg/m3
PM10: 17.27 μg/m3
Carbon Monoxide: 334.41 μg/m3
Nitrogen Dioxide: 7.87 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 77.04 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 12:53 AM
Sunset: 7:56 PM
Daylight: 14 hrs 6 mins
Moonrise: 7:56 PM
Moon Transit: 12:00 AM
Moonset: 4:41 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:24 PM - 4:54 PM

Minor Periods

7:26 PM - 8:56 PM
4:11 AM - 5:41 AM

Action Rating: 4 out of 5

Saturday, August 9, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 70°F
Average Humidity: 65%
Chance of Rain: 0%
Wind: 9.8 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 14.34 μg/m3
PM10: 19.91 μg/m3
Carbon Monoxide: 265.12 μg/m3
Nitrogen Dioxide: 6.45 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 78.23 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 12:53 AM
Sunset: 7:55 PM
Daylight: 14 hrs 4 mins
Moonrise: 8:24 PM
Moon Transit: 12:50 AM
Moonset: 5:54 AM
Moon Phase: Full
Moon Illumination: 99.0%

Best Times for Fishing or Hunting

Major Periods

12:20 AM - 2:50 AM
3:14 PM - 5:44 PM

Minor Periods

7:54 PM - 9:24 PM
5:24 AM - 6:54 AM

Action Rating: 5 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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