Water Temperature of Mystic Harbor in Mystic, CT

Current Water Temperature

47.3°F

Measurement Time: Wednesday, April 5, 2023, 7:54 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

78.1°F
Sunny
Sunny
80.4°F
84.3°F
62%
SSW 11.2 mph
13.6 mph
81.3°F
67.2°F
0 in
0%
9 mi
1023 mbar
6.7

Five Day Weather Forecast

Sunny
Mon
H: 82°F
L: 62°F
Sunny
Tue
H: 83°F
L: 68°F
Sunny
Wed
H: 86°F
L: 69°F
Partly Cloudy
Thu
H: 84°F
L: 68°F
Sunny
Fri
H: 79°F
L: 65°F

Air Quality

AQI: 1 - Good
PM2.5: 8.3 μg/m3
PM10: 11.8 μg/m3
Carbon Monoxide: 140 μg/m3
Nitrogen Dioxide: 4.8 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 79 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 12:53 AM
Sunset: 8:21 PM
Daylight: 14 hrs 55 mins
Moonrise: 4:01 AM
Moon Transit: 12:10 AM
Moonset: 8:13 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:38 AM - 4:08 AM
11:40 AM - 2:10 PM

Minor Periods

7:43 PM - 9:13 PM
3:31 AM - 5:01 AM

Action Rating: 4 out of 5

Small Craft Advisory issued July 13 at 2:36AM EDT until July 15 at 11:00AM EDT by NWS Upton NY

Effective: Mon July 13, 2026, 2:36 AM
Expires: Mon July 13, 2026, 4:00 PM

* WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt and seas 4 to 7 feet expected. * WHERE...Fire Island Inlet NY to Montauk Point NY out 20 nm. * WHEN...From noon Tuesday to 11 AM EDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Monday, July 13, 2026

Weather Forecast

Sunny
81.9°F
61.5°F
72.1°F
74%
0 in
7%
0%
15.2 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 7.86 μg/m3
PM10: 11.83 μg/m3
Carbon Monoxide: 139.04 μg/m3
Nitrogen Dioxide: 3.3 μg/m3
Sulphur Dioxide: 0.58 μg/m3
Ozone: 83.25 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 12:53 AM
Sunset: 8:21 PM
Daylight: 14 hrs 55 mins
Moonrise: 4:01 AM
Moon Transit: 12:10 AM
Moonset: 8:13 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:38 AM - 4:08 AM
11:40 AM - 2:10 PM

Minor Periods

7:43 PM - 9:13 PM
3:31 AM - 5:01 AM

Action Rating: 4 out of 5

Tuesday, July 14, 2026

Weather Forecast

Sunny
82.6°F
68.4°F
74.6°F
70%
0 in
6%
0%
20.6 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 11.72 μg/m3
PM10: 15.46 μg/m3
Carbon Monoxide: 148.67 μg/m3
Nitrogen Dioxide: 5.22 μg/m3
Sulphur Dioxide: 0.69 μg/m3
Ozone: 100.63 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 12:53 AM
Sunset: 8:21 PM
Daylight: 14 hrs 54 mins
Moonrise: 5:19 AM
Moon Transit: 1:14 PM
Moonset: 8:57 PM
Moon Phase: New
Moon Illumination: 1.9%

Best Times for Fishing or Hunting

Major Periods

2:43 AM - 5:13 AM
12:44 AM - 3:14 PM

Minor Periods

8:27 PM - 9:57 PM
4:49 AM - 6:19 AM

Action Rating: 5 out of 5

Wednesday, July 15, 2026

Weather Forecast

Sunny
86.4°F
69.3°F
76.8°F
76%
0.14 in
62%
0%
14.1 mph
9.3


Air Quality

AQI: 1 - Good
PM2.5: 8.54 μg/m3
PM10: 9.27 μg/m3
Carbon Monoxide: 145.88 μg/m3
Nitrogen Dioxide: 5.9 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 115.13 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 12:53 AM
Sunset: 8:20 PM
Daylight: 14 hrs 52 mins
Moonrise: 6:41 AM
Moon Transit: 2:13 PM
Moonset: 9:31 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

3:44 AM - 6:14 AM
1:43 PM - 4:13 PM

Minor Periods

9:01 PM - 10:31 PM
6:11 AM - 7:41 AM

Action Rating: 3 out of 5

Thursday, July 16, 2026

Weather Forecast

Partly Cloudy
83.8°F
68.2°F
75.6°F
67%
0 in
7%
0%
14.5 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 8.96 μg/m3
PM10: 9.74 μg/m3
Carbon Monoxide: 147.86 μg/m3
Nitrogen Dioxide: 6.96 μg/m3
Sulphur Dioxide: 0.51 μg/m3
Ozone: 102.25 μg/m3

Astronomical

Sunrise: 5:28 AM
Sun Transit: 12:54 AM
Sunset: 8:19 PM
Daylight: 14 hrs 51 mins
Moonrise: 8:00 AM
Moon Transit: 3:06 PM
Moonset: 9:59 PM
Moon Phase: New
Moon Illumination: 2.4%

Best Times for Fishing or Hunting

Major Periods

4:40 AM - 7:10 AM
2:36 PM - 5:06 PM

Minor Periods

9:29 PM - 10:59 PM
7:30 AM - 9:00 AM

Action Rating: 3 out of 5

Friday, July 17, 2026

Weather Forecast

Sunny
79.2°F
65°F
72.1°F
56%
0 in
3%
0%
13.2 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 5.96 μg/m3
PM10: 6.02 μg/m3
Carbon Monoxide: 205.56 μg/m3
Nitrogen Dioxide: 9.43 μg/m3
Sulphur Dioxide: 0.34 μg/m3
Ozone: 55.89 μg/m3

Astronomical

Sunrise: 5:29 AM
Sun Transit: 12:54 AM
Sunset: 8:19 PM
Daylight: 14 hrs 50 mins
Moonrise: 9:14 AM
Moon Transit: 3:55 PM
Moonset: 10:23 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

5:30 AM - 8:00 AM
3:25 PM - 5:55 PM

Minor Periods

9:53 PM - 11:23 PM
8:44 AM - 10:14 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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