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

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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

25.5°F
Mostly cloudy
Conditions: Mostly cloudy
Humidity: 70%
Heat Index: 25.5°F
Feels Like: 15.7°F
Wind: NE 6.2 mph
Wind Gusts: 16 mph
Wind Chill: 15.7°F
Air Pressure: 1018.82 millibars
Dew Point: 15.7°F
Chance of Precipitation: 10%
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 10 mi
UV Index: 0

Five Day Weather Forecast

Light freezing rain
Sat
H: 29°F
L: 20°F
Sunny
Sun
H: 42°F
L: 23°F
Moderate rain
Mon
H: 43°F
L: 34°F
Light snow
Tue
H: 31°F
L: 27°F
Cloudy
Wed
H: 33°F
L: 27°F

Air Quality

AQI: 1 - Good
PM2.5: 3.75 μg/m3
PM10: 4.15 μg/m3
Carbon Monoxide: 184.85 μg/m3
Nitrogen Dioxide: 11.55 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 68 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:49 AM
Sunset: 4:26 PM
Daylight: 9 hrs 13 mins
Moonrise: 11:24 AM
Moon Transit: 4:23 AM
Moonset: 12:15 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%

Best Times for Fishing or Hunting

Major Periods

3:53 AM - 6:23 AM
3:53 AM - 6:23 AM

Minor Periods

10:54 AM - 12:24 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Winter Storm Warning issued December 27 at 1:08AM EST until December 27 at 1:00PM EST by NWS Upton NY

Effective: Sat December 27, 2025, 1:08 AM
Expires: Sat December 27, 2025, 9:15 AM

* WHAT...Heavy snow. Additional snow accumulations up to two inches. * WHERE...Northern Middlesex, Northern New London, Southern Middlesex, and Southern New London Counties. * WHEN...Until 1 PM EST this afternoon. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Visibilities may drop below 1/4 mile due to falling and blowing snow.

Persons should consider delaying all travel. If travel is absolutely necessary, drive with extreme caution. Consider taking a winter storm kit along with you, including such items as tire chains, booster cables, flashlight, shovel, blankets and extra clothing. Also take water, a first aid kit, and anything else that would help you survive in case you become stranded.


Special Weather Statement issued December 27 at 6:20AM EST by NWS Upton NY

Effective: Sat December 27, 2025, 6:20 AM
Expires: Sat December 27, 2025, 10:00 AM

Snow continues to taper off to flurries early this morning. Little to no additional snow accumulation is expected. Roads, especially secondaries, remain snow covered and hazardous. Use extra caution if you must travel this morning.


Special Weather Statement issued December 27 at 5:28AM EST by NWS Upton NY

Effective: Sat December 27, 2025, 5:28 AM
Expires: Sat December 27, 2025, 10:00 AM

Snow continues to taper off to flurries early this morning. Little to no additional snow accumulation is expected. Roads, especially secondaries, remain snow covered and hazardous. Use extra caution if you must travel this morning.


Special Weather Statement issued December 27 at 5:16AM EST by NWS Upton NY

Effective: Sat December 27, 2025, 5:16 AM
Expires: Sat December 27, 2025, 10:00 AM

Snow continues to taper off to flurries early this morning. Little to no additional snow accumulation is expected. Roads, especially secondaries, remain snow covered and hazardous. Use extra caution if you must travel this morning.


Winter Weather Advisory issued December 27 at 1:09AM EST until December 27 at 10:00AM EST by NWS Boston/Norton MA

Effective: Sat December 27, 2025, 1:09 AM
Expires: Sat December 27, 2025, 10:00 AM

* WHAT...Snow. Additional snow accumulations up to one inch. * WHERE...Portions of northern Connecticut, central, eastern, southeastern, and western Massachusetts, and northern and southern Rhode Island. * WHEN...Until 10 AM EST this morning. * IMPACTS...Plan on slippery road conditions.

Slow down and use caution while traveling.


Winter Weather Advisory issued December 27 at 6:11AM EST until December 27 at 10:00AM EST by NWS Boston/Norton MA

Effective: Sat December 27, 2025, 6:11 AM
Expires: Sat December 27, 2025, 10:00 AM

* WHAT...Snow. Additional snow accumulations up to one inch. * WHERE...Portions of eastern and southeastern Massachusetts and northern and southern Rhode Island. * WHEN...Until 10 AM EST this morning. * IMPACTS...Plan on slippery road conditions.

Slow down and use caution while traveling.
Saturday, December 27, 2025

Weather Forecast

Conditions: Light freezing rain
Average Temperature: 24.5°F
Average Humidity: 81%
Chance of Rain: 76%
Wind: 15.9 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 3.71 μg/m3
PM10: 4.26 μg/m3
Carbon Monoxide: 199.77 μg/m3
Nitrogen Dioxide: 8.06 μg/m3
Sulphur Dioxide: 2.19 μg/m3
Ozone: 70.04 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:49 AM
Sunset: 4:26 PM
Daylight: 9 hrs 13 mins
Moonrise: 11:24 AM
Moon Transit: 4:23 AM
Moonset: 12:15 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%

Best Times for Fishing or Hunting

Major Periods

3:53 AM - 6:23 AM
3:53 AM - 6:23 AM

Minor Periods

10:54 AM - 12:24 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, December 28, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 30.7°F
Average Humidity: 57%
Chance of Rain: 0%
Wind: 11.6 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 8.63 μg/m3
PM10: 9.07 μg/m3
Carbon Monoxide: 265.57 μg/m3
Nitrogen Dioxide: 15.52 μg/m3
Sulphur Dioxide: 3.66 μg/m3
Ozone: 60.24 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:49 AM
Sunset: 4:26 PM
Daylight: 9 hrs 13 mins
Moonrise: 11:47 AM
Moon Transit: 6:35 PM
Moonset: 12:26 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%

Best Times for Fishing or Hunting

Major Periods

8:10 AM - 10:40 AM
6:05 PM - 8:35 PM

Minor Periods

11:17 AM - 12:47 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, December 29, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 40.2°F
Average Humidity: 94%
Chance of Rain: 87%
Wind: 27.5 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 9.44 μg/m3
PM10: 11.72 μg/m3
Carbon Monoxide: 190.97 μg/m3
Nitrogen Dioxide: 12.09 μg/m3
Sulphur Dioxide: 2.92 μg/m3
Ozone: 60.08 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:50 AM
Sunset: 4:27 PM
Daylight: 9 hrs 14 mins
Moonrise: 12:13 AM
Moon Transit: 7:27 PM
Moonset: 1:39 AM
Moon Phase: First Quarter
Moon Illumination: 73.5%

Best Times for Fishing or Hunting

Major Periods

9:00 AM - 11:30 AM
6:57 PM - 9:27 PM

Minor Periods

11:43 AM - 1:13 PM
1:09 AM - 2:39 AM

Action Rating: 2 out of 5

Tuesday, December 30, 2025

Weather Forecast

Conditions: Light snow
Average Temperature: 29.4°F
Average Humidity: 66%
Chance of Rain: 0%
Wind: 30.2 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 3.07 μg/m3
PM10: 3.09 μg/m3
Carbon Monoxide: 169.79 μg/m3
Nitrogen Dioxide: 8.19 μg/m3
Sulphur Dioxide: 3.01 μg/m3
Ozone: 65 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 11:50 AM
Sunset: 4:28 PM
Daylight: 9 hrs 14 mins
Moonrise: 12:46 AM
Moon Transit: 8:24 PM
Moonset: 2:57 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

9:55 AM - 12:25 AM
7:54 PM - 10:24 PM

Minor Periods

12:16 AM - 1:46 PM
2:27 AM - 3:57 AM

Action Rating: 2 out of 5

Wednesday, December 31, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 29.3°F
Average Humidity: 65%
Chance of Rain: 0%
Wind: 25.7 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 1.6 μg/m3
PM10: 1.63 μg/m3
Carbon Monoxide: 152.47 μg/m3
Nitrogen Dioxide: 3.21 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 79 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 11:51 AM
Sunset: 4:29 PM
Daylight: 9 hrs 15 mins
Moonrise: 1:27 PM
Moon Transit: 9:27 PM
Moonset: 4:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.5%

Best Times for Fishing or Hunting

Major Periods

10:55 AM - 1:25 PM
8:57 PM - 11:27 PM

Minor Periods

12:57 AM - 2:27 PM
3:47 AM - 5:17 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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