Water Temperature of the Mystic River in Mystic, CT

Current Water Temperature

49.3°F

Measurement Time: Monday, April 10, 2023, 5:18 AM EDT

Temperature Locations

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Local Points of Interest

Mystic Seaport

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

69.1°F
Clear
Clear
69.1°F
62.8°F
78%
SW 2.9 mph
6.1 mph
62.8°F
50.8°F
0 in
25%
9 mi
1007 mbar
0

Five Day Weather Forecast

Sunny
Sat
H: 84°F
L: 58°F
Patchy rain nearby
Sun
H: 74°F
L: 63°F
Sunny
Mon
H: 70°F
L: 53°F
Sunny
Tue
H: 74°F
L: 58°F
Patchy rain nearby
Wed
H: 74°F
L: 63°F

Air Quality

AQI: 1 - Good
PM2.5: 27.6 μg/m3
PM10: 33.4 μg/m3
Carbon Monoxide: 157 μg/m3
Nitrogen Dioxide: 3 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 162 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 12:46 AM
Sunset: 8:19 PM
Daylight: 15 hrs 4 mins
Moonrise: 12:18 AM
Moon Transit: 5:27 AM
Moonset: 10:46 AM
Moon Phase: Last Quarter
Moon Illumination: 53.9%

Best Times for Fishing or Hunting

Major Periods

4:57 AM - 7:27 AM
7:48 PM - 10:18 PM

Minor Periods

10:16 AM - 11:46 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Air Quality Alert issued June 5 at 10:59PM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri June 5, 2026, 10:59 PM
Expires: Sat June 6, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Southern Fairfield, Southern New Haven, Southern Middlesex, Southern New London. from 11 AM to 11 PM EDT Saturday. An Air Quality Action Day means that Ground Level Ozone 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 June 5 at 10:59PM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri June 5, 2026, 10:59 PM
Expires: Sat June 6, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Northern Fairfield, Northern New Haven, Northern Middlesex, Northern New London. from 11 AM to 11 PM EDT Saturday. An Air Quality Action Day means that Ground Level Ozone 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 June 6 at 2:46AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Sat June 6, 2026, 2:46 AM
Expires: Sat June 6, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Northern Fairfield, Northern New Haven, Northern Middlesex, Northern New London. from 11 AM this morning to 11 PM EDT this evening. An Air Quality Action Day means that Ground Level Ozone 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 June 6 at 2:46AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Sat June 6, 2026, 2:46 AM
Expires: Sat June 6, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Southern Fairfield, Southern New Haven, Southern Middlesex, Southern New London. from 11 AM this morning to 11 PM EDT this evening. An Air Quality Action Day means that Ground Level Ozone 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


Special Weather Statement issued June 6 at 8:16PM EDT by NWS Upton NY

Effective: Sat June 6, 2026, 8:16 PM
Expires: Sat June 6, 2026, 9:00 PM

At 815 PM EDT, Doppler radar was tracking a strong thunderstorm near Bozrah, or near Salem, moving east at 35 mph. HAZARD...Winds in excess of 30 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to outdoor objects is possible. Locations impacted include... Jewett City, Norwich, New London, Colchester, Groton, Salem, Mystic, Waterford, East Lyme, Ledyard, Griswold, East Haddam, Lebanon, Preston, and Lisbon.

If outdoors, consider seeking shelter inside a building.


Saturday, June 6, 2026

Weather Forecast

Sunny
83.5°F
58.1°F
70.5°F
72%
0 in
2%
0%
16.6 mph
7.8


Air Quality

AQI: 2 - Moderate
PM2.5: 18.41 μg/m3
PM10: 23.08 μg/m3
Carbon Monoxide: 152.04 μg/m3
Nitrogen Dioxide: 4.5 μg/m3
Sulphur Dioxide: 0.72 μg/m3
Ozone: 139.33 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 12:46 AM
Sunset: 8:19 PM
Daylight: 15 hrs 4 mins
Moonrise: 12:18 AM
Moon Transit: 5:27 AM
Moonset: 10:46 AM
Moon Phase: Last Quarter
Moon Illumination: 53.9%

Best Times for Fishing or Hunting

Major Periods

4:57 AM - 7:27 AM
7:48 PM - 10:18 PM

Minor Periods

10:16 AM - 11:46 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Sunday, June 7, 2026

Weather Forecast

Patchy rain nearby
73.8°F
62.6°F
67.3°F
77%
0.17 in
73%
0%
16.6 mph
7.5


Air Quality

AQI: 1 - Good
PM2.5: 4.14 μg/m3
PM10: 4.68 μg/m3
Carbon Monoxide: 140.79 μg/m3
Nitrogen Dioxide: 5.37 μg/m3
Sulphur Dioxide: 0.41 μg/m3
Ozone: 95.63 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 12:46 AM
Sunset: 8:19 PM
Daylight: 15 hrs 5 mins
Moonrise: 12:41 AM
Moon Transit: 6:11 AM
Moonset: 11:51 AM
Moon Phase: Last Quarter
Moon Illumination: 42.6%

Best Times for Fishing or Hunting

Major Periods

5:41 AM - 8:11 AM
8:31 PM - 11:01 PM

Minor Periods

11:21 AM - 12:51 AM
12:11 AM - 1:41 AM

Action Rating: 4 out of 5

Monday, June 8, 2026

Weather Forecast

Sunny
70°F
53.3°F
62.2°F
63%
0 in
1%
0%
13.2 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 4.74 μg/m3
PM10: 5.73 μg/m3
Carbon Monoxide: 123.08 μg/m3
Nitrogen Dioxide: 5.73 μg/m3
Sulphur Dioxide: 0.41 μg/m3
Ozone: 77.08 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 12:47 AM
Sunset: 8:20 PM
Daylight: 15 hrs 6 mins
Moonrise: 1:03 AM
Moon Transit: 6:54 AM
Moonset: 12:58 AM
Moon Phase: Last Quarter
Moon Illumination: 31.6%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
9:15 PM - 11:45 PM

Minor Periods

12:28 AM - 1:58 PM
12:33 AM - 2:03 AM

Action Rating: 2 out of 5

Tuesday, June 9, 2026

Weather Forecast

Sunny
74.3°F
58.4°F
65.6°F
61%
0 in
1%
0%
16.1 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 6.34 μg/m3
PM10: 9.2 μg/m3
Carbon Monoxide: 123.54 μg/m3
Nitrogen Dioxide: 4.33 μg/m3
Sulphur Dioxide: 0.48 μg/m3
Ozone: 75.67 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 12:47 AM
Sunset: 8:20 PM
Daylight: 15 hrs 6 mins
Moonrise: 1:23 AM
Moon Transit: 6:27 AM
Moonset: 2:06 PM
Moon Phase: Last Quarter
Moon Illumination: 21.6%

Best Times for Fishing or Hunting

Major Periods

5:57 AM - 8:27 AM
5:57 AM - 8:27 AM

Minor Periods

1:36 PM - 3:06 PM
12:53 AM - 2:23 AM

Action Rating: 2 out of 5

Wednesday, June 10, 2026

Weather Forecast

Patchy rain nearby
73.9°F
62.7°F
66.9°F
81%
0.04 in
73%
0%
15 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 8.91 μg/m3
PM10: 13.28 μg/m3
Carbon Monoxide: 146.89 μg/m3
Nitrogen Dioxide: 2.31 μg/m3
Sulphur Dioxide: 0.47 μg/m3
Ozone: 85.44 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 12:47 AM
Sunset: 8:21 PM
Daylight: 15 hrs 7 mins
Moonrise: 1:46 AM
Moon Transit: 8:25 AM
Moonset: 3:18 PM
Moon Phase: Waning Crescent
Moon Illumination: 13.1%

Best Times for Fishing or Hunting

Major Periods

7:55 AM - 10:25 AM
12:00 AM - 12:00 AM

Minor Periods

2:48 PM - 4:18 PM
1:16 AM - 2:46 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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