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

39.9°F
Cloudy
Cloudy
29.6°F
40.9°F
83%
WSW 23.5 mph
34.7 mph
32.1°F
36.9°F
0 in
25%
9 mi
1000 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Tue
H: 41°F
L: 33°F
Sunny
Wed
H: 35°F
L: 28°F
Sunny
Thu
H: 42°F
L: 31°F
Overcast
Fri
H: 45°F
L: 33°F
Patchy rain nearby
Sat
H: 50°F
L: 34°F

Air Quality

AQI: 1 - Good
PM2.5: 3.15 μg/m3
PM10: 3.25 μg/m3
Carbon Monoxide: 202.85 μg/m3
Nitrogen Dioxide: 4.55 μg/m3
Sulphur Dioxide: 2.05 μg/m3
Ozone: 85 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 12:56 AM
Sunset: 6:57 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:15 AM
Moon Transit: 11:50 AM
Moonset: 5:37 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:25 AM - 3:55 AM
11:20 AM - 1:50 PM

Minor Periods

5:07 PM - 6:37 PM
5:45 AM - 7:15 AM

Action Rating: 5 out of 5

Dense Fog Advisory issued March 16 at 4:38PM EDT until March 17 at 1:00AM EDT by NWS Upton NY

Effective: Mon March 16, 2026, 4:38 PM
Expires: Tue March 17, 2026, 4:00 AM

* WHAT...For the Wind Advisory, south winds 20 to 35 mph with gusts up to 55 mph, shifting west late tonight. Isolated gusts to 60 mph possible. For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. * WHERE...Portions of southern Connecticut and southeast New York. * WHEN...For the Dense Fog Advisory, until 1 AM EDT Tuesday. For the Wind Advisory, until 4 AM EDT Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects. Scattered tree limbs, as well as isolated trees and powerlines could be blown down. Power outages possible. Locally damaging wind gusts in excess of 60 mph are possible with any stronger thunderstorm activity this evening into tonight. This activity will be addressed by Special Weather Statements or Severe Thunderstorm Warnings as needed. Low visibility could make driving conditions hazardous.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Wind Advisory issued March 16 at 4:38PM EDT until March 17 at 4:00AM EDT by NWS Upton NY

Effective: Mon March 16, 2026, 4:38 PM
Expires: Tue March 17, 2026, 4:00 AM

* WHAT...For the Wind Advisory, south winds 20 to 35 mph with gusts up to 55 mph, shifting west late tonight. Isolated gusts to 60 mph possible. For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. * WHERE...Portions of southern Connecticut and southeast New York. * WHEN...For the Dense Fog Advisory, until 1 AM EDT Tuesday. For the Wind Advisory, until 4 AM EDT Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects. Scattered tree limbs, as well as isolated trees and powerlines could be blown down. Power outages possible. Locally damaging wind gusts in excess of 60 mph are possible with any stronger thunderstorm activity this evening into tonight. This activity will be addressed by Special Weather Statements or Severe Thunderstorm Warnings as needed. Low visibility could make driving conditions hazardous.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Wind Advisory issued March 16 at 4:38PM EDT until March 17 at 4:00AM EDT by NWS Upton NY

Effective: Mon March 16, 2026, 4:38 PM
Expires: Tue March 17, 2026, 4:00 AM

* WHAT...South winds 20 to 35 mph with gusts up to 55 mph, shifting west late tonight. Isolated gusts to 60 mph possible. * WHERE...In Connecticut, Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. In New Jersey, Eastern Bergen, Eastern Essex, Eastern Union, and Hudson Counties. In New York, New York (Manhattan) and Richmond (Staten Island) Counties. * WHEN...Until 4 AM EDT Tuesday. * IMPACTS...Gusty winds will blow around unsecured objects. Scattered tree limbs, as well as isolated trees and powerlines could be blown down. Power outages possible. Locally damaging wind gusts in excess of 60 mph are possible with any stronger thunderstorm activity this evening into tonight. This activity will be addressed by Special Weather Statements or Severe Thunderstorm Warnings as needed.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects.


Flood Watch issued March 16 at 3:02PM EDT until March 17 at 8:00AM EDT by NWS Upton NY

Effective: Mon March 16, 2026, 3:02 PM
Expires: Tue March 17, 2026, 8:00 AM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of southern Connecticut, including the following areas, Northern Fairfield, Northern Middlesex, Northern New Haven, Northern New London, Southern Fairfield, Southern Middlesex, Southern New Haven and Southern New London. * WHEN...Through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.


Flood Watch issued March 16 at 3:04PM EDT until March 17 at 8:00AM EDT by NWS Boston/Norton MA

Effective: Mon March 16, 2026, 3:04 PM
Expires: Tue March 17, 2026, 8:00 AM

* WHAT...Flooding is possible from periods of heavy rain through tonight combined with last week/s snow melt. * WHERE...All of southern New England except the outer-Islands. * WHEN...Through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - Periods of heavy showers and potentially a few embedded thunder will continue through tonight. This combined with last week/s snow melt may result in some river and small stream flooding as well as pockets poor drainage street flooding. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.


Tuesday, March 17, 2026

Weather Forecast

Patchy rain nearby
40.8°F
32.9°F
39.8°F
66%
0.02 in
81%
0%
33.1 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 3.73 μg/m3
PM10: 4.76 μg/m3
Carbon Monoxide: 166.29 μg/m3
Nitrogen Dioxide: 3.44 μg/m3
Sulphur Dioxide: 1.66 μg/m3
Ozone: 83.2 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 12:56 AM
Sunset: 6:57 PM
Daylight: 12 hrs 1 mins
Moonrise: 6:15 AM
Moon Transit: 11:50 AM
Moonset: 5:37 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:25 AM - 3:55 AM
11:20 AM - 1:50 PM

Minor Periods

5:07 PM - 6:37 PM
5:45 AM - 7:15 AM

Action Rating: 5 out of 5

Wednesday, March 18, 2026

Weather Forecast

Sunny
34.9°F
27.9°F
30.8°F
44%
0 in
0%
0%
15.9 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 3.44 μg/m3
PM10: 3.73 μg/m3
Carbon Monoxide: 197.49 μg/m3
Nitrogen Dioxide: 3.13 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 93.32 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:55 AM
Sunset: 6:58 PM
Daylight: 12 hrs 3 mins
Moonrise: 6:37 AM
Moon Transit: 12:36 AM
Moonset: 6:48 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

2:12 AM - 4:42 AM
12:06 AM - 2:36 PM

Minor Periods

6:18 PM - 7:48 PM
6:07 AM - 7:37 AM

Action Rating: 3 out of 5

Thursday, March 19, 2026

Weather Forecast

Sunny
42.4°F
31.3°F
36.3°F
65%
0 in
0%
0%
9.2 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 5.91 μg/m3
PM10: 8.04 μg/m3
Carbon Monoxide: 194.69 μg/m3
Nitrogen Dioxide: 2.98 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 100.52 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:00 AM
Sunset: 6:59 PM
Daylight: 12 hrs 6 mins
Moonrise: 6:59 AM
Moon Transit: 1:31 AM
Moonset: 8:01 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

1:01 AM - 3:31 AM
1:01 AM - 3:31 AM

Minor Periods

7:31 PM - 9:01 PM
6:29 AM - 7:59 AM

Action Rating: 4 out of 5

Friday, March 20, 2026

Weather Forecast

Overcast
44.7°F
33.1°F
39.1°F
82%
0 in
0%
0%
11.4 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 10.82 μg/m3
PM10: 12.52 μg/m3
Carbon Monoxide: 206.99 μg/m3
Nitrogen Dioxide: 8.1 μg/m3
Sulphur Dioxide: 2.59 μg/m3
Ozone: 89.08 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 10:27 AM
Sunset: 7:00 PM
Daylight: 12 hrs 9 mins
Moonrise: 7:22 AM
Moon Transit: 2:12 PM
Moonset: 9:17 PM
Moon Phase: New
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

3:47 AM - 6:17 AM
1:42 PM - 4:12 PM

Minor Periods

8:47 PM - 10:17 PM
6:52 AM - 8:22 AM

Action Rating: 4 out of 5

Saturday, March 21, 2026

Weather Forecast

Patchy rain nearby
49.5°F
34.2°F
40.6°F
76%
0.02 in
66%
0%
14.1 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 10.71 μg/m3
PM10: 13.98 μg/m3
Carbon Monoxide: 215.39 μg/m3
Nitrogen Dioxide: 5.74 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 94.85 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:00 AM
Sunset: 7:01 PM
Daylight: 12 hrs 12 mins
Moonrise: 7:50 AM
Moon Transit: 3:05 PM
Moonset: 10:36 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

4:38 AM - 7:08 AM
2:35 PM - 5:05 PM

Minor Periods

10:06 PM - 11:36 PM
7:20 AM - 8:50 AM

Action Rating: 4 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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