Water Temperature of Mystic Harbor in Mystic, CT

Current Water Temperature

47.5°F

Measurement Time: Wednesday, April 5, 2023, 8:00 AM EDT

Temperature Locations

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Local Points of Interest

Mason Island

Mystic Harbor

Station Name: MYSTIC HARBOR AT SAFE HARBOR MARINA NR MYSTIC, CT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet

Nearest Address:
99 Roseleah Dr
Mystic, CT 06355
New London County

GPS Coordinates: 41.3464722, -71.9688611

Nearby Water Temperatures

Mystic River, Mystic, CT (1 mi)
Mystic River, Noank, CT (1.5 mi)
Mystic River, Old Mystic, CT (2.2 mi)
Thames River, Groton, CT (5.9 mi)
Thames River, New London, CT (6.8 mi)
Pawcatuck River, Westerly, RI (7.5 mi)
Yantic River, Norwich, CT (16.7 mi)
Connecticut River, Old Lyme, CT (19.7 mi)
East Branch Eightmile River, Lyme, CT (19.8 mi)
Eightmile River, East Haddam, CT (20 mi)
Fort Pond Bay, Montauk, NY (20.6 mi)
Orient Harbor, Orient, NY (22.8 mi)
Connecticut River, Middletown, CT (33.1 mi)
Natchaug River, Chaplin, CT (33.2 mi)
Great Harbor, North Kingstown, RI (33.4 mi)

Weather for Mystic, Connecticut

Current Weather

17.1°F
Sunny
Sunny
4.7°F
18.9°F
49%
WNW 10.7 mph
12.8 mph
7.7°F
9°F
0 in
0%
9 mi
1017 mbar
1.3

Five Day Weather Forecast

Sunny
Thu
H: 26°F
L: 6°F
Sunny
Fri
H: 21°F
L: 8°F
Sunny
Sat
H: 23°F
L: 9°F
Overcast
Sun
H: 24°F
L: 11°F
Partly Cloudy
Mon
H: 31°F
L: 16°F

Air Quality

AQI: 1 - Good
PM2.5: 6.95 μg/m3
PM10: 6.95 μg/m3
Carbon Monoxide: 222.85 μg/m3
Nitrogen Dioxide: 8.65 μg/m3
Sulphur Dioxide: 2.55 μg/m3
Ozone: 73 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:01 AM
Sunset: 5:01 PM
Daylight: 9 hrs 59 mins
Moonrise: 1:07 PM
Moon Transit: 9:20 PM
Moonset: 4:30 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

10:49 AM - 1:19 PM
8:50 PM - 11:20 PM

Minor Periods

12:37 AM - 2:07 PM
4:00 AM - 5:30 AM

Action Rating: 2 out of 5

Cold Weather Advisory issued January 29 at 12:51AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...Very cold wind chills as low as 14 below expected. * WHERE...Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. * WHEN...From midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. 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 January 29 at 5:44AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 5:44 AM
Expires: Thu January 29, 2026, 2:00 PM

* WHAT...Very cold wind chills as low as 12 below expected. * WHERE...Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. * WHEN...From midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

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


Cold Weather Advisory issued January 29 at 12:31AM EST until January 30 at 11:00AM EST by NWS Boston/Norton MA

Effective: Thu January 29, 2026, 12:31 AM
Expires: Thu January 29, 2026, 5:00 PM

* WHAT...Very cold wind chills as low as 20 below zero expected. * WHERE...Much of Southern New England except for the Berkshires, northern hills of Worcester County, Cape Cod and the Islands. * WHEN...From 7 PM this evening to 11 AM EST Friday. * IMPACTS...The 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.


Cold Weather Advisory issued January 29 at 6:04AM EST until January 30 at 11:00AM EST by NWS Boston/Norton MA

Effective: Thu January 29, 2026, 6:04 AM
Expires: Thu January 29, 2026, 7:00 PM

* WHAT...Very cold wind chills as low as 20 below zero expected. * WHERE...Much of Southern New England except for the Berkshires, northern hills of Worcester County, as well as Cape Cod and the Islands. * WHEN...From 7 PM this evening to 11 AM EST Friday. * IMPACTS...The 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.


Cold Weather Advisory issued January 29 at 6:04AM EST until January 30 at 11:00AM EST by NWS Boston/Norton MA

Effective: Thu January 29, 2026, 6:04 AM
Expires: Thu January 29, 2026, 7:00 PM

* WHAT...Very cold wind chills as low as 20 below zero expected. * WHERE...Bristol RI County. * WHEN...From 7 PM this evening to 11 AM EST Friday. * IMPACTS...The 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.
Thursday, January 29, 2026

Weather Forecast

Sunny
25.5°F
5.9°F
13.6°F
62%
0 in
0%
0%
16.8 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 7.85 μg/m3
PM10: 7.9 μg/m3
Carbon Monoxide: 255.61 μg/m3
Nitrogen Dioxide: 8.87 μg/m3
Sulphur Dioxide: 2.62 μg/m3
Ozone: 67.76 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:01 AM
Sunset: 5:01 PM
Daylight: 9 hrs 59 mins
Moonrise: 1:07 PM
Moon Transit: 9:20 PM
Moonset: 4:30 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

10:49 AM - 1:19 PM
8:50 PM - 11:20 PM

Minor Periods

12:37 AM - 2:07 PM
4:00 AM - 5:30 AM

Action Rating: 2 out of 5

Friday, January 30, 2026

Weather Forecast

Sunny
21.2°F
8.4°F
14°F
59%
0 in
0%
0%
18.8 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 3.31 μg/m3
PM10: 3.38 μg/m3
Carbon Monoxide: 178.45 μg/m3
Nitrogen Dioxide: 4.43 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 72.32 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 12:01 AM
Sunset: 5:02 PM
Daylight: 10 hrs 1 mins
Moonrise: 2:18 PM
Moon Transit: 10:24 PM
Moonset: 5:32 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.4%

Best Times for Fishing or Hunting

Major Periods

11:53 AM - 2:23 PM
12:00 AM - 12:00 AM

Minor Periods

1:48 PM - 3:18 PM
5:02 AM - 6:32 AM

Action Rating: 3 out of 5

Saturday, January 31, 2026

Weather Forecast

Sunny
22.5°F
9.3°F
15.6°F
65%
0 in
0%
0%
11 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 3.61 μg/m3
PM10: 3.77 μg/m3
Carbon Monoxide: 201.65 μg/m3
Nitrogen Dioxide: 5.71 μg/m3
Sulphur Dioxide: 1.74 μg/m3
Ozone: 69.32 μg/m3

Astronomical

Sunrise: 7:00 AM
Sun Transit: 12:01 AM
Sunset: 5:03 PM
Daylight: 10 hrs 3 mins
Moonrise: 3:35 PM
Moon Transit: 11:24 PM
Moonset: 6:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.9%

Best Times for Fishing or Hunting

Major Periods

12:55 AM - 3:25 PM
12:00 AM - 12:00 AM

Minor Periods

3:05 PM - 4:35 PM
5:52 AM - 7:22 AM

Action Rating: 4 out of 5

Sunday, February 1, 2026

Weather Forecast

Overcast
24.4°F
11.3°F
18.5°F
70%
0 in
0%
9%
22.4 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 4.16 μg/m3
PM10: 4.67 μg/m3
Carbon Monoxide: 196.36 μg/m3
Nitrogen Dioxide: 7.97 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 71.88 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:01 AM
Sunset: 5:04 PM
Daylight: 10 hrs 5 mins
Moonrise: 4:53 PM
Moon Transit: 12:00 AM
Moonset: 7:01 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:52 PM - 4:22 PM

Minor Periods

4:23 PM - 5:53 PM
6:31 AM - 8:01 AM

Action Rating: 4 out of 5

Monday, February 2, 2026

Weather Forecast

Partly Cloudy
30.8°F
16.4°F
22.3°F
82%
0 in
0%
0%
14.8 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 4.27 μg/m3
PM10: 4.63 μg/m3
Carbon Monoxide: 176.76 μg/m3
Nitrogen Dioxide: 5.11 μg/m3
Sulphur Dioxide: 1.76 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:01 AM
Sunset: 5:05 PM
Daylight: 10 hrs 7 mins
Moonrise: 6:09 PM
Moon Transit: 12:19 AM
Moonset: 7:31 AM
Moon Phase: Full
Moon Illumination: 99.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:44 PM - 5:14 PM

Minor Periods

5:39 PM - 7:09 PM
7:01 AM - 8:31 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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