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

34°F
Clear
Clear
23°F
37.2°F
41%
WNW 18.3 mph
25.6 mph
29.2°F
13.3°F
0 in
0%
9 mi
1017 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 40°F
L: 17°F
Sunny
Sat
H: 20°F
L: 6°F
Moderate or heavy snow showers
Sun
H: 21°F
L: 14°F
Moderate or heavy snow showers
Mon
H: 32°F
L: 18°F
Partly Cloudy
Tue
H: 22°F
L: 12°F

Air Quality

AQI: 1 - Good
PM2.5: 2.15 μg/m3
PM10: 2.35 μg/m3
Carbon Monoxide: 164.85 μg/m3
Nitrogen Dioxide: 3.35 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 71 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:00 AM
Sunset: 4:53 PM
Daylight: 9 hrs 46 mins
Moonrise: 9:29 AM
Moon Transit: 9:54 AM
Moonset: 10:17 PM
Moon Phase: Waxing Crescent
Moon Illumination: 24.4%

Best Times for Fishing or Hunting

Major Periods

5:23 AM - 7:53 AM
9:24 AM - 11:54 AM

Minor Periods

9:47 PM - 11:17 PM
8:59 AM - 10:29 AM

Action Rating: 2 out of 5

Cold Weather Advisory issued January 23 at 2:01AM EST until January 24 at 10:00AM EST by NWS Upton NY

Effective: Fri January 23, 2026, 2:01 AM
Expires: Fri January 23, 2026, 5:00 PM

* WHAT...Very cold wind chills as low as 10 below expected. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From 10 PM this evening to 10 AM EST Saturday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Winter Storm Watch issued January 23 at 1:57AM EST until January 26 at 6:00PM EST by NWS Upton NY

Effective: Fri January 23, 2026, 1:57 AM
Expires: Fri January 23, 2026, 5:00 PM

* WHAT...Heavy snow. Total snow accumulations between 8 and 14 inches, with locally higher amounts possible. The snow may mix with or change to sleet along the coast Sunday evening, limiting accumulations to the lower end of the range. Highest totals are expected across the interior. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From late Saturday night through Monday 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. * ADDITIONAL DETAILS...The heaviest snow is likely to occur Sunday morning into early Sunday evening.

Persons should consider delaying travel from Sunday into Monday. If travel is absolutely necessary, drive with extreme caution. Make sure your car is winterized and in good working order. 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.


Winter Storm Warning issued January 23 at 1:12PM EST until January 26 at 6:00PM EST by NWS Upton NY

Effective: Fri January 23, 2026, 1:12 PM
Expires: Sat January 24, 2026, 5:00 AM

* WHAT...Heavy snow expected. Total snow accumulations between 12 and 16 inches. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From 3 AM Sunday to 6 PM EST Monday. * 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 travel from Sunday into Monday. If travel is absolutely necessary, drive with extreme caution. Make sure your car is winterized and in good working order. 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.


Cold Weather Advisory issued January 23 at 1:05PM EST until January 24 at 12:00PM EST by NWS Upton NY

Effective: Fri January 23, 2026, 1:05 PM
Expires: Sat January 24, 2026, 4:15 AM

* WHAT...Very cold wind chills as low as 14 below expected. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From 10 PM this evening to noon EST Saturday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. 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 23 at 3:34AM EST until January 24 at 10:00AM EST by NWS Boston/Norton MA

Effective: Fri January 23, 2026, 3:34 AM
Expires: Fri January 23, 2026, 4:45 PM

* WHAT...Very cold wind chills as low as 20 below expected in much of southern New England. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern and southern Rhode Island. * WHEN...From 10 PM this evening to 10 AM EST Saturday. * IMPACTS...The dangerously cold wind chills as low as 20 below zero could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

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


Winter Storm Watch issued January 23 at 3:33AM EST until January 26 at 7:00PM EST by NWS Boston/Norton MA

Effective: Fri January 23, 2026, 3:33 AM
Expires: Fri January 23, 2026, 4:45 PM

* WHAT...Heavy snow possible. Total snow accumulations between 8 and 15 inches possible. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern and southern Rhode Island. * WHEN...From Sunday morning through Monday evening. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. The hazardous conditions could impact the Monday morning and evening commutes.

Monitor the latest forecasts for updates on this situation. Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order.


Winter Storm Warning issued January 23 at 12:28PM EST until January 26 at 8:00PM EST by NWS Boston/Norton MA

Effective: Fri January 23, 2026, 12:28 PM
Expires: Sat January 24, 2026, 7:00 AM

* WHAT...Heavy snow expected. Total snow accumulations between 12 and 17 inches. Winds gusting as high as 30 mph. * WHERE...Much of Southern New England excluding Martha's Vineyard, Nantucket and Block Island. * WHEN...From 7 AM Sunday to 8 PM EST Monday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible, especially if traveling overnight into the Monday morning commute. The hazardous conditions could impact the Monday morning and evening commutes.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Persons should consider delaying all travel. Motorists should use extreme caution if travel is absolutely necessary.


Cold Weather Advisory issued January 23 at 11:04AM EST until January 24 at 10:00AM EST by NWS Boston/Norton MA

Effective: Fri January 23, 2026, 11:04 AM
Expires: Sat January 24, 2026, 3:15 AM

* WHAT...Very cold wind chills as low as 15 below zero expected. * WHERE...Much of southern New England. * WHEN...From 10 PM this evening to 10 AM EST Saturday. * IMPACTS...Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

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


Winter Storm Warning issued January 23 at 12:28PM EST until January 26 at 8:00PM EST by NWS Boston/Norton MA

Effective: Fri January 23, 2026, 12:28 PM
Expires: Sat January 24, 2026, 7:00 AM

* WHAT...Heavy snow and sleet expected. Total snow accumulations between 7 and 10 inches. Winds gusting as high as 40 mph. * WHERE...Block Island, Martha's Vineyard and Nantucket. * WHEN...From 7 AM Sunday to 8 PM EST Monday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Persons should consider delaying all travel. Motorists should use extreme caution if travel is absolutely necessary.


Cold Weather Advisory issued January 23 at 11:04AM EST until January 24 at 10:00AM EST by NWS Boston/Norton MA

Effective: Fri January 23, 2026, 11:04 AM
Expires: Sat January 24, 2026, 3:15 AM

* WHAT...Very cold wind chills as low as 15 below zero expected. * WHERE...Cape Cod and the Islands. * WHEN...From 10 PM this evening to 10 AM EST Saturday. * IMPACTS...Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

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


Friday, January 23, 2026

Weather Forecast

Sunny
39.9°F
17.2°F
32.3°F
49%
0 in
0%
0%
21.3 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 4.56 μg/m3
PM10: 4.75 μg/m3
Carbon Monoxide: 196.61 μg/m3
Nitrogen Dioxide: 8.35 μg/m3
Sulphur Dioxide: 3.85 μg/m3
Ozone: 71.68 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:00 AM
Sunset: 4:53 PM
Daylight: 9 hrs 46 mins
Moonrise: 9:29 AM
Moon Transit: 9:54 AM
Moonset: 10:17 PM
Moon Phase: Waxing Crescent
Moon Illumination: 24.4%

Best Times for Fishing or Hunting

Major Periods

5:23 AM - 7:53 AM
9:24 AM - 11:54 AM

Minor Periods

9:47 PM - 11:17 PM
8:59 AM - 10:29 AM

Action Rating: 2 out of 5

Saturday, January 24, 2026

Weather Forecast

Sunny
19.9°F
5.9°F
12.2°F
38%
0 in
0%
0%
20.6 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 2.44 μg/m3
PM10: 2.6 μg/m3
Carbon Monoxide: 170.81 μg/m3
Nitrogen Dioxide: 3.81 μg/m3
Sulphur Dioxide: 1.59 μg/m3
Ozone: 71.36 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:00 AM
Sunset: 4:54 PM
Daylight: 9 hrs 48 mins
Moonrise: 9:51 AM
Moon Transit: 4:32 PM
Moonset: 11:28 PM
Moon Phase: First Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

6:08 AM - 8:38 AM
4:02 PM - 6:32 PM

Minor Periods

12:00 AM - 12:00 AM
9:21 AM - 10:51 AM

Action Rating: 2 out of 5

Sunday, January 25, 2026

Weather Forecast

Moderate or heavy snow showers
20.8°F
13.5°F
16.4°F
67%
3.01 in
68%
37%
21.5 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 2.89 μg/m3
PM10: 3.09 μg/m3
Carbon Monoxide: 192.73 μg/m3
Nitrogen Dioxide: 6.86 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 72.12 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:00 AM
Sunset: 4:56 PM
Daylight: 9 hrs 50 mins
Moonrise: 10:16 AM
Moon Transit: 5:22 PM
Moonset: 12:28 AM
Moon Phase: First Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

6:56 AM - 9:26 AM
4:52 PM - 7:22 PM

Minor Periods

9:46 AM - 11:16 AM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Monday, January 26, 2026

Weather Forecast

Moderate or heavy snow showers
32.4°F
18°F
27°F
88%
1.38 in
71%
28%
28.2 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.29 μg/m3
PM10: 4.09 μg/m3
Carbon Monoxide: 175.53 μg/m3
Nitrogen Dioxide: 6.73 μg/m3
Sulphur Dioxide: 1.56 μg/m3
Ozone: 72.52 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:00 AM
Sunset: 4:57 PM
Daylight: 9 hrs 52 mins
Moonrise: 10:45 AM
Moon Transit: 6:15 PM
Moonset: 12:43 AM
Moon Phase: First Quarter
Moon Illumination: 57.1%

Best Times for Fishing or Hunting

Major Periods

7:47 AM - 10:17 AM
5:45 PM - 8:15 PM

Minor Periods

10:15 AM - 11:45 AM
12:13 AM - 1:43 AM

Action Rating: 2 out of 5

Tuesday, January 27, 2026

Weather Forecast

Partly Cloudy
22°F
11.9°F
16°F
77%
0 in
0%
19%
17.7 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 3.93 μg/m3
PM10: 4.4 μg/m3
Carbon Monoxide: 187.2 μg/m3
Nitrogen Dioxide: 7.06 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 67.92 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:00 AM
Sunset: 4:58 PM
Daylight: 9 hrs 54 mins
Moonrise: 11:21 AM
Moon Transit: 7:13 PM
Moonset: 2:00 AM
Moon Phase: First Quarter
Moon Illumination: 68.0%

Best Times for Fishing or Hunting

Major Periods

8:44 AM - 11:14 AM
6:43 PM - 9:13 PM

Minor Periods

10:51 AM - 12:21 AM
1:30 AM - 3:00 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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