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

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

8.1°F
Sunny
Sunny
-8.1°F
12°F
45%
NNW 13.2 mph
15.2 mph
-3.2°F
2.8°F
0 in
0%
9 mi
1017 mbar
1.8

Five Day Weather Forecast

Sunny
Sun
H: 21°F
L: 0°F
Sunny
Mon
H: 32°F
L: 5°F
Moderate or heavy snow showers
Tue
H: 32°F
L: 15°F
Moderate or heavy snow showers
Wed
H: 37°F
L: 25°F
Partly Cloudy
Thu
H: 32°F
L: 21°F

Air Quality

AQI: 1 - Good
PM2.5: 4.45 μg/m3
PM10: 5.05 μg/m3
Carbon Monoxide: 191.85 μg/m3
Nitrogen Dioxide: 4.75 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 74 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:02 AM
Sunset: 5:13 PM
Daylight: 10 hrs 21 mins
Moonrise: 12:42 AM
Moon Transit: 4:47 AM
Moonset: 9:44 AM
Moon Phase: Last Quarter
Moon Illumination: 52.5%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
7:08 PM - 9:38 PM

Minor Periods

9:14 AM - 10:44 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Extreme Cold Warning issued February 8 at 12:07AM EST until February 8 at 1:00PM EST by NWS Upton NY

Effective: Sun February 8, 2026, 12:07 AM
Expires: Sun February 8, 2026, 8:15 AM

* WHAT...Dangerously cold wind chills as low as 21 below. * WHERE...In Connecticut, Northern Middlesex, Northern New London, Southern Middlesex, and Southern New London Counties. In New York, Northeast Suffolk and Southeast Suffolk Counties. * WHEN...Until 1 PM EST this afternoon. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes.

Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Special Weather Statement issued February 8 at 4:06AM EST by NWS Upton NY

Effective: Sun February 8, 2026, 4:06 AM
Expires: Sun February 8, 2026, 8:30 AM

Some patchy areas of blowing and drifting snow can be expected, especially in the vicinity of farms and open fields into early this morning. Visibility may quickly be reduced to a half mile or less at times, and drifting snow could result in snow covered roads in spots. Extra caution should be used if traveling into early this morning. Be prepared for slippery conditions in some spots and allow for extra spacing between vehicles.


Extreme Cold Warning issued February 8 at 1:44AM EST until February 8 at 1:00PM EST by NWS Upton NY

Effective: Sun February 8, 2026, 1:44 AM
Expires: Sun February 8, 2026, 1:15 PM

* WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 21 below. For the Cold Weather Advisory, very cold wind chills as low as 11 below expected. * WHERE...Northern Middlesex, Northern New London, Southern Middlesex, and Southern New London Counties. * WHEN...For the Extreme Cold Warning, until 1 PM EST this afternoon. For the Cold Weather Advisory, from 1 PM this afternoon to 10 AM EST Monday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes.

Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Cold Weather Advisory issued February 8 at 1:44AM EST until February 9 at 10:00AM EST by NWS Upton NY

Effective: Sun February 8, 2026, 1:44 AM
Expires: Sun February 8, 2026, 1:15 PM

* WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 21 below. For the Cold Weather Advisory, very cold wind chills as low as 11 below expected. * WHERE...Northern Middlesex, Northern New London, Southern Middlesex, and Southern New London Counties. * WHEN...For the Extreme Cold Warning, until 1 PM EST this afternoon. For the Cold Weather Advisory, from 1 PM this afternoon to 10 AM EST Monday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes.

Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Cold Weather Advisory issued February 8 at 1:13AM EST until February 8 at 1:00PM EST by NWS Boston/Norton MA

Effective: Sun February 8, 2026, 1:13 AM
Expires: Sun February 8, 2026, 1:00 PM

* WHAT...Very cold wind chills as low as 17 below. * WHERE...Portions of eastern, northeastern, and southeastern Massachusetts and northern and southern Rhode Island. * WHEN...Until 1 PM EST this afternoon. * IMPACTS...The cold wind chills as low as 15 below zero could result in hypothermia or frostbite if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Sunday, February 8, 2026

Weather Forecast

Sunny
20.8°F
0.3°F
8.8°F
61%
0 in
0%
0%
16.8 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 4.31 μg/m3
PM10: 4.97 μg/m3
Carbon Monoxide: 186.73 μg/m3
Nitrogen Dioxide: 4.15 μg/m3
Sulphur Dioxide: 1.58 μg/m3
Ozone: 70.44 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:02 AM
Sunset: 5:13 PM
Daylight: 10 hrs 21 mins
Moonrise: 12:42 AM
Moon Transit: 4:47 AM
Moonset: 9:44 AM
Moon Phase: Last Quarter
Moon Illumination: 52.5%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
7:08 PM - 9:38 PM

Minor Periods

9:14 AM - 10:44 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, February 9, 2026

Weather Forecast

Sunny
31.8°F
4.8°F
16.4°F
59%
0 in
0%
0%
12.1 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 4.83 μg/m3
PM10: 5.1 μg/m3
Carbon Monoxide: 194.05 μg/m3
Nitrogen Dioxide: 5.37 μg/m3
Sulphur Dioxide: 1.7 μg/m3
Ozone: 73.36 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:02 AM
Sunset: 5:14 PM
Daylight: 10 hrs 24 mins
Moonrise: 12:47 AM
Moon Transit: 5:32 AM
Moonset: 10:13 AM
Moon Phase: Last Quarter
Moon Illumination: 41.2%

Best Times for Fishing or Hunting

Major Periods

5:02 AM - 7:32 AM
7:55 PM - 10:25 PM

Minor Periods

9:43 AM - 11:13 AM
12:17 AM - 1:47 AM

Action Rating: 2 out of 5

Tuesday, February 10, 2026

Weather Forecast

Moderate or heavy snow showers
31.8°F
15.1°F
24°F
64%
0.12 in
78%
7%
10.1 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 9.09 μg/m3
PM10: 9.28 μg/m3
Carbon Monoxide: 221.93 μg/m3
Nitrogen Dioxide: 11.24 μg/m3
Sulphur Dioxide: 2.62 μg/m3
Ozone: 72 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 12:02 AM
Sunset: 5:15 PM
Daylight: 10 hrs 26 mins
Moonrise: 1:50 AM
Moon Transit: 6:20 AM
Moonset: 10:46 AM
Moon Phase: Last Quarter
Moon Illumination: 30.3%

Best Times for Fishing or Hunting

Major Periods

5:50 AM - 8:20 AM
8:44 PM - 11:14 PM

Minor Periods

10:16 AM - 11:46 AM
1:20 AM - 2:50 AM

Action Rating: 2 out of 5

Wednesday, February 11, 2026

Weather Forecast

Moderate or heavy snow showers
37.4°F
25.2°F
30.2°F
83%
0.17 in
70%
12%
15.4 mph
0.5


Air Quality

AQI: 2 - Moderate
PM2.5: 17.45 μg/m3
PM10: 18.33 μg/m3
Carbon Monoxide: 256.02 μg/m3
Nitrogen Dioxide: 25.21 μg/m3
Sulphur Dioxide: 5.14 μg/m3
Ozone: 52.2 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:02 AM
Sunset: 5:17 PM
Daylight: 10 hrs 29 mins
Moonrise: 2:52 AM
Moon Transit: 7:10 AM
Moonset: 11:27 AM
Moon Phase: Last Quarter
Moon Illumination: 20.5%

Best Times for Fishing or Hunting

Major Periods

6:40 AM - 9:10 AM
12:00 AM - 12:00 AM

Minor Periods

10:57 AM - 12:27 AM
2:22 AM - 3:52 AM

Action Rating: 3 out of 5

Thursday, February 12, 2026

Weather Forecast

Partly Cloudy
31.6°F
21.4°F
25.7°F
83%
0 in
0%
10%
12.5 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.52 μg/m3
PM10: 3.54 μg/m3
Carbon Monoxide: 230.29 μg/m3
Nitrogen Dioxide: 7.96 μg/m3
Sulphur Dioxide: 1.71 μg/m3
Ozone: 60.08 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:02 AM
Sunset: 5:18 PM
Daylight: 10 hrs 31 mins
Moonrise: 3:48 AM
Moon Transit: 8:02 AM
Moonset: 12:17 AM
Moon Phase: Waning Crescent
Moon Illumination: 12.2%

Best Times for Fishing or Hunting

Major Periods

7:32 AM - 10:02 AM
12:00 AM - 12:00 AM

Minor Periods

11:47 AM - 1:17 PM
3:18 AM - 4:48 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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