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

69.8°F
Fog
Fog
73°F
69.8°F
100%
S 7.6 mph
14.7 mph
69.8°F
69.7°F
0 in
100%
1 mi
1015 mbar
0

Five Day Weather Forecast

Fog
Sun
H: 84°F
L: 70°F
Light rain shower
Mon
H: 75°F
L: 70°F
Patchy rain nearby
Tue
H: 80°F
L: 70°F
Fog
Wed
H: 74°F
L: 69°F
Partly Cloudy
Thu
H: 82°F
L: 71°F

Air Quality

AQI: 1 - Good
PM2.5: 7.9 μg/m3
PM10: 11.8 μg/m3
Carbon Monoxide: 119 μg/m3
Nitrogen Dioxide: 2.5 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 80 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 12:54 AM
Sunset: 8:04 PM
Daylight: 14 hrs 20 mins
Moonrise: 9:54 PM
Moon Transit: 3:34 AM
Moonset: 9:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:04 AM - 5:34 AM
5:55 PM - 8:25 PM

Minor Periods

9:24 PM - 10:54 PM
9:17 AM - 10:47 AM

Action Rating: 4 out of 5

Small Craft Advisory issued August 1 at 1:54PM EDT until August 3 at 8:00PM EDT by NWS Upton NY

Effective: Sat August 1, 2026, 1:54 PM
Expires: Sun August 2, 2026, 5:00 AM

* WHAT...South winds 10 to 15 kt with gusts up to 25 kt and seas 1 to 3 feet expected. * WHERE...Long Island Sound east of Orient Point and the Connecticut River, and South Shore Bays from Jones Inlet through Shinnecock Bay. * WHEN...From 4 AM to 8 PM EDT Monday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued August 1 at 1:54PM EDT until August 4 at 6:00AM EDT by NWS Upton NY

Effective: Sat August 1, 2026, 1:54 PM
Expires: Sun August 2, 2026, 5:00 AM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 30 kt and seas 5 to 8 feet expected. * WHERE...Fire Island Inlet NY to Montauk Point NY out 20 nm. * WHEN...From midnight Sunday night to 6 AM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Sunday, August 2, 2026

Weather Forecast

Fog
83.5°F
69.8°F
74°F
94%
0.01 in
44%
0%
11 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 8.72 μg/m3
PM10: 13.22 μg/m3
Carbon Monoxide: 116.75 μg/m3
Nitrogen Dioxide: 2.82 μg/m3
Sulphur Dioxide: 0.59 μg/m3
Ozone: 80.46 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 12:54 AM
Sunset: 8:04 PM
Daylight: 14 hrs 20 mins
Moonrise: 9:54 PM
Moon Transit: 3:34 AM
Moonset: 9:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:04 AM - 5:34 AM
5:55 PM - 8:25 PM

Minor Periods

9:24 PM - 10:54 PM
9:17 AM - 10:47 AM

Action Rating: 4 out of 5

Monday, August 3, 2026

Weather Forecast

Light rain shower
74.9°F
69.5°F
71.4°F
96%
0.7 in
92%
0%
17.4 mph
6.5


Air Quality

AQI: 1 - Good
PM2.5: 5.84 μg/m3
PM10: 9.18 μg/m3
Carbon Monoxide: 107.21 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 0.23 μg/m3
Ozone: 78.46 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 12:54 AM
Sunset: 8:03 PM
Daylight: 14 hrs 18 mins
Moonrise: 10:17 PM
Moon Transit: 12:00 AM
Moonset: 10:55 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
6:39 PM - 9:09 PM

Minor Periods

9:47 PM - 11:17 PM
10:25 AM - 11:55 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Patchy rain nearby
80.3°F
69.6°F
73.7°F
88%
0.05 in
67%
0%
8.3 mph
8.1


Air Quality

AQI: 1 - Good
PM2.5: 6.9 μg/m3
PM10: 7.73 μg/m3
Carbon Monoxide: 154.92 μg/m3
Nitrogen Dioxide: 5.44 μg/m3
Sulphur Dioxide: 0.61 μg/m3
Ozone: 102.04 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 12:54 AM
Sunset: 8:01 PM
Daylight: 14 hrs 16 mins
Moonrise: 10:42 PM
Moon Transit: 5:04 AM
Moonset: 12:05 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

4:34 AM - 7:04 AM
7:27 PM - 9:57 PM

Minor Periods

10:12 PM - 11:42 PM
11:35 AM - 1:05 PM

Action Rating: 2 out of 5

Wednesday, August 5, 2026

Weather Forecast

Fog
74.3°F
69.3°F
71.7°F
96%
0.07 in
81%
0%
9.8 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 7.3 μg/m3
PM10: 9.6 μg/m3
Carbon Monoxide: 170.43 μg/m3
Nitrogen Dioxide: 6.54 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 82.79 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 12:53 AM
Sunset: 8:00 PM
Daylight: 14 hrs 13 mins
Moonrise: 11:11 PM
Moon Transit: 5:52 AM
Moonset: 1:18 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
8:18 PM - 10:48 PM

Minor Periods

12:00 AM - 12:00 AM
12:48 AM - 2:18 PM

Action Rating: 4 out of 5

Thursday, August 6, 2026

Weather Forecast

Partly Cloudy
81.8°F
70.7°F
75.4°F
86%
0.11 in
69%
0%
14.1 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 5.89 μg/m3
PM10: 8.19 μg/m3
Carbon Monoxide: 168.44 μg/m3
Nitrogen Dioxide: 4.98 μg/m3
Sulphur Dioxide: 0.72 μg/m3
Ozone: 83 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 12:53 AM
Sunset: 7:59 PM
Daylight: 14 hrs 11 mins
Moonrise: 12:11 AM
Moon Transit: 6:46 AM
Moonset: 2:34 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

6:16 AM - 8:46 AM
9:14 PM - 11:44 PM

Minor Periods

2:04 PM - 3:34 PM
12:00 AM - 12:00 AM

Action Rating: 3 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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