Water Temperature of the Mystic River in Old Mystic, CT

Current Water Temperature

54.5°F

Measurement Time: Wednesday, April 5, 2023, 10:42 AM EDT

Temperature Locations

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Mystic River

Station Name: MYSTIC RIVER US RTE I95 BRIDGE NEAR OLD MYSTIC, CT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet / 0 meters

Nearest Address:
3 Whitehall Lndg
Old Mystic, CT 06355
New London County

GPS Coordinates: 41.37782778, -71.9631806

Nearby Water Temperatures

Mystic River, Mystic, CT (1.1 mi)
Mystic Harbor, Mystic, CT (2.2 mi)
Mystic River, Noank, CT (3.6 mi)
Thames River, Groton, CT (6.5 mi)
Pawcatuck River, Westerly, RI (6.8 mi)
Thames River, New London, CT (6.9 mi)
Yantic River, Norwich, CT (14.9 mi)
East Branch Eightmile River, Lyme, CT (19.6 mi)
Eightmile River, East Haddam, CT (19.6 mi)
Connecticut River, Old Lyme, CT (20.4 mi)
Fort Pond Bay, Montauk, NY (22.8 mi)
Orient Harbor, Orient, NY (24.4 mi)
Natchaug River, Chaplin, CT (31.2 mi)
Hemlock Brook, Foster, RI (31.6 mi)
Wilbur Hollow Brook, Clayville, RI (31.6 mi)

Weather for Old Mystic, Connecticut

Current Weather

73°F
Mist
Conditions: Mist
Humidity: 84%
Feels Like: 77.2°F
Wind: E 5.6 mph
Wind Gusts: 7.1 mph
Pressure: 30.28 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 4.3

Five Day Weather Forecast

Fog
Tue
H: 77°F
L: 61°F
Partly Cloudy
Wed
H: 83°F
L: 66°F
Overcast
Thu
H: 72°F
L: 60°F
Partly Cloudy
Fri
H: 75°F
L: 61°F
Sunny
Sat
H: 77°F
L: 64°F

Air Quality

AQI: 1 - Good
PM2.5: 51.62 μg/m3
PM10: 54.39 μg/m3
Carbon Monoxide: 492.1 μg/m3
Nitrogen Dioxide: 15.36 μg/m3
Sulphur Dioxide: 3.33 μg/m3
Ozone: 174 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 4 at 10:12AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon August 4, 2025, 10:12 AM
Expires: Tue August 5, 2025, 10:15 AM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex, New London. 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 4 at 10:12AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon August 4, 2025, 10:12 AM
Expires: Tue August 5, 2025, 10:15 AM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex, New London. 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 4 at 10:12AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon August 4, 2025, 10:12 AM
Expires: Tue August 5, 2025, 10:15 AM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex, New London. 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 4 at 10:12AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon August 4, 2025, 10:12 AM
Expires: Tue August 5, 2025, 10:15 AM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex, New London. 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


Tuesday, August 5, 2025

Weather Forecast

Conditions: Fog
Average Temperature: 68.8°F
Average Humidity: 88%
Chance of Rain: 0%
Wind: 8.3 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: Partly Cloudy
Average Temperature: 72.1°F
Average Humidity: 72%
Chance of Rain: 0%
Wind: 9.6 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 11 mins
Moonrise: 6:44 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

6:14 PM - 7:44 PM
1:56 AM - 3:26 AM

Action Rating: 3 out of 5

Thursday, August 7, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 66.2°F
Average Humidity: 79%
Chance of Rain: 0%
Wind: 8.9 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: Partly Cloudy
Average Temperature: 68.3°F
Average Humidity: 65%
Chance of Rain: 0%
Wind: 9.6 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: 67%
Chance of Rain: 0%
Wind: 11.2 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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