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

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

12°F
Sunny
Sunny
0.4°F
11.3°F
69%
NNE 8.1 mph
16 mph
1.7°F
2.9°F
0 in
0%
9 mi
1009 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 34°F
L: 11°F
Overcast
Sat
H: 26°F
L: 7°F
Sunny
Sun
H: 19°F
L: 2°F
Overcast
Mon
H: 21°F
L: 6°F
Light freezing rain
Tue
H: 30°F
L: 4°F

Air Quality

AQI: 1 - Good
PM2.5: 7.95 μg/m3
PM10: 9.65 μg/m3
Carbon Monoxide: 189.85 μg/m3
Nitrogen Dioxide: 9.35 μg/m3
Sulphur Dioxide: 2.55 μg/m3
Ozone: 75 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:01 AM
Sunset: 5:10 PM
Daylight: 10 hrs 16 mins
Moonrise: 10:39 PM
Moon Transit: 3:21 AM
Moonset: 9:00 AM
Moon Phase: Waning Gibbous
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

2:51 AM - 5:21 AM
5:41 PM - 8:11 PM

Minor Periods

10:09 PM - 11:39 PM
8:30 AM - 10:00 AM

Action Rating: 2 out of 5

Extreme Cold Watch issued February 5 at 1:03PM EST until February 8 at 1:00PM EST by NWS Upton NY

Effective: Thu February 5, 2026, 1:03 PM
Expires: Fri February 6, 2026, 5:00 AM

* WHAT...Dangerously cold wind chills of 20 below possible. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From Saturday evening through early Sunday 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. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above-ground pipes to protect them from freezing. 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. Monitor the latest forecasts and warnings for updates.


Cold Weather Advisory issued February 6 at 1:00AM EST until February 8 at 1:00PM EST by NWS Boston/Norton MA

Effective: Fri February 6, 2026, 1:00 AM
Expires: Fri February 6, 2026, 3:00 PM

* WHAT...Very cold wind chills as low as 20 below expected. * WHERE...Portions of eastern, northeastern, and southeastern Massachusetts and northern and southern Rhode Island. * WHEN...From 6 PM Saturday to 1 PM EST Sunday. * IMPACTS...The dangerously cold wind chills as low as 20 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.


Extreme Cold Watch issued February 5 at 12:13PM EST until February 8 at 1:00PM EST by NWS Boston/Norton MA

Effective: Thu February 5, 2026, 12:13 PM
Expires: Fri February 6, 2026, 5:00 AM

* WHAT...Dangerously cold wind chills as low as 20 to 25 below zero possible. * WHERE...All of Northern Connecticut. * WHEN...From Saturday evening through Sunday afternoon. * IMPACTS...The dangerously cold wind chills as low as 20 to 25 below zero 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.


Extreme Cold Warning issued February 6 at 1:00AM EST until February 8 at 1:00PM EST by NWS Boston/Norton MA

Effective: Fri February 6, 2026, 1:00 AM
Expires: Fri February 6, 2026, 3:00 PM

* WHAT...Dangerously cold wind chills as low as 25 to 30 below expected. * WHERE...Portions of northern Connecticut and central and western Massachusetts. * WHEN...From 6 PM Saturday to 1 PM EST Sunday. * IMPACTS...The dangerously cold wind chills as low as 30 below zero 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.


Friday, February 6, 2026

Weather Forecast

Sunny
34.2°F
10.6°F
22.6°F
71%
0 in
0%
0%
9.4 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 8.11 μg/m3
PM10: 9.09 μg/m3
Carbon Monoxide: 248.53 μg/m3
Nitrogen Dioxide: 10.79 μg/m3
Sulphur Dioxide: 2.61 μg/m3
Ozone: 71.24 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:01 AM
Sunset: 5:10 PM
Daylight: 10 hrs 16 mins
Moonrise: 10:39 PM
Moon Transit: 3:21 AM
Moonset: 9:00 AM
Moon Phase: Waning Gibbous
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

2:51 AM - 5:21 AM
5:41 PM - 8:11 PM

Minor Periods

10:09 PM - 11:39 PM
8:30 AM - 10:00 AM

Action Rating: 2 out of 5

Saturday, February 7, 2026

Weather Forecast

Overcast
25.9°F
6.9°F
20.6°F
75%
0 in
0%
3%
26.2 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 6.92 μg/m3
PM10: 7.8 μg/m3
Carbon Monoxide: 238.57 μg/m3
Nitrogen Dioxide: 12.99 μg/m3
Sulphur Dioxide: 3.4 μg/m3
Ozone: 64.48 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:02 AM
Sunset: 5:12 PM
Daylight: 10 hrs 19 mins
Moonrise: 11:42 PM
Moon Transit: 4:04 AM
Moonset: 9:21 AM
Moon Phase: Waning Gibbous
Moon Illumination: 63.7%

Best Times for Fishing or Hunting

Major Periods

3:34 AM - 6:04 AM
6:24 PM - 8:54 PM

Minor Periods

12:00 AM - 12:00 AM
8:51 AM - 10:21 AM

Action Rating: 2 out of 5

Sunday, February 8, 2026

Weather Forecast

Sunny
19.2°F
1.6°F
8.8°F
58%
0 in
0%
0%
22.6 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 2.76 μg/m3
PM10: 2.87 μg/m3
Carbon Monoxide: 174.85 μg/m3
Nitrogen Dioxide: 4.43 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 69.72 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

Overcast
20.8°F
5.7°F
14.4°F
74%
0 in
0%
7%
17.2 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.17 μg/m3
PM10: 3.28 μg/m3
Carbon Monoxide: 182.54 μg/m3
Nitrogen Dioxide: 5.04 μg/m3
Sulphur Dioxide: 1.73 μg/m3
Ozone: 71.96 μg/m3

Astronomical

Sunrise: 6:50 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

Light freezing rain
29.8°F
4°F
17.9°F
83%
0.01 in
73%
13%
9.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 4.64 μg/m3
PM10: 4.79 μg/m3
Carbon Monoxide: 192.75 μg/m3
Nitrogen Dioxide: 6.83 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 74.54 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

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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