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

32.4°F
Sunny
Sunny
25.5°F
33.1°F
81%
S 7.6 mph
12.9 mph
29.1°F
30.1°F
0 in
0%
9 mi
1021 mbar
2.4

Five Day Weather Forecast

Fog
Sat
H: 41°F
L: 19°F
Moderate or heavy snow showers
Sun
H: 35°F
L: 21°F
Sunny
Mon
H: 29°F
L: 16°F
Moderate or heavy snow showers
Tue
H: 38°F
L: 24°F
Patchy rain nearby
Wed
H: 43°F
L: 34°F

Air Quality

AQI: 1 - Good
PM2.5: 13.85 μg/m3
PM10: 18.45 μg/m3
Carbon Monoxide: 199.85 μg/m3
Nitrogen Dioxide: 9.05 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 74 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 12:00 AM
Sunset: 5:37 PM
Daylight: 11 hrs 13 mins
Moonrise: 2:32 PM
Moon Transit: 10:08 PM
Moonset: 4:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

11:40 AM - 2:10 PM
12:00 AM - 12:00 AM

Minor Periods

2:02 PM - 3:32 PM
4:28 AM - 5:58 AM

Action Rating: 3 out of 5

Special Weather Statement issued February 28 at 5:03AM EST by NWS Upton NY

Effective: Sat February 28, 2026, 5:03 AM
Expires: Sat February 28, 2026, 9:00 AM

Areas of fog have developed over portions of the region and are expected to expand this morning, lingering into mid-morning. At the same time, temperatures in most spots will be at or below freezing. This combination, along with any refreezing of melted snow, could result in slippery conditions of untreated surfaces due to black ice. Use caution if traveling this morning as black ice can make conditions very slick. Locally reduced visibility will be possible as well. Leave extra room between you and the car in front of you. Additionally, pedestrians should use caution walking on any untreated surfaces.


Saturday, February 28, 2026

Weather Forecast

Fog
41°F
18.5°F
30°F
91%
0 in
0%
0%
8.3 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 11.69 μg/m3
PM10: 15.79 μg/m3
Carbon Monoxide: 245.05 μg/m3
Nitrogen Dioxide: 9.03 μg/m3
Sulphur Dioxide: 1.99 μg/m3
Ozone: 73.76 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 12:00 AM
Sunset: 5:37 PM
Daylight: 11 hrs 13 mins
Moonrise: 2:32 PM
Moon Transit: 10:08 PM
Moonset: 4:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

11:40 AM - 2:10 PM
12:00 AM - 12:00 AM

Minor Periods

2:02 PM - 3:32 PM
4:28 AM - 5:58 AM

Action Rating: 3 out of 5

Sunday, March 1, 2026

Weather Forecast

Moderate or heavy snow showers
34.7°F
20.6°F
31.4°F
91%
0.23 in
79%
17%
14.3 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 11.01 μg/m3
PM10: 12.66 μg/m3
Carbon Monoxide: 303.73 μg/m3
Nitrogen Dioxide: 16.99 μg/m3
Sulphur Dioxide: 2.35 μg/m3
Ozone: 71.2 μg/m3

Astronomical

Sunrise: 6:22 AM
Sun Transit: 12:00 AM
Sunset: 5:39 PM
Daylight: 11 hrs 16 mins
Moonrise: 3:47 PM
Moon Transit: 11:00 PM
Moonset: 5:31 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

12:33 AM - 3:03 PM
12:00 AM - 12:00 AM

Minor Periods

3:17 PM - 4:47 PM
5:01 AM - 6:31 AM

Action Rating: 3 out of 5

Monday, March 2, 2026

Weather Forecast

Sunny
28.9°F
15.8°F
23.8°F
55%
0 in
0%
0%
13.4 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 3.99 μg/m3
PM10: 4.33 μg/m3
Carbon Monoxide: 194.29 μg/m3
Nitrogen Dioxide: 4.53 μg/m3
Sulphur Dioxide: 2.29 μg/m3
Ozone: 88.08 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 12:00 AM
Sunset: 5:40 PM
Daylight: 11 hrs 19 mins
Moonrise: 5:00 PM
Moon Transit: 11:46 PM
Moonset: 5:58 AM
Moon Phase: Full
Moon Illumination: 99.1%

Best Times for Fishing or Hunting

Major Periods

1:22 PM - 3:52 PM
12:00 AM - 12:00 AM

Minor Periods

4:30 PM - 6:00 PM
5:28 AM - 6:58 AM

Action Rating: 4 out of 5

Tuesday, March 3, 2026

Weather Forecast

Moderate or heavy snow showers
37.8°F
24.4°F
31.3°F
78%
0.52 in
70%
0%
18.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 6.01 μg/m3
PM10: 8.13 μg/m3
Carbon Monoxide: 185.31 μg/m3
Nitrogen Dioxide: 3.99 μg/m3
Sulphur Dioxide: 2.27 μg/m3
Ozone: 90.48 μg/m3

Astronomical

Sunrise: 6:19 AM
Sun Transit: 12:00 AM
Sunset: 5:41 PM
Daylight: 11 hrs 22 mins
Moonrise: 6:09 PM
Moon Transit: 12:00 AM
Moonset: 6:21 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:39 PM - 7:09 PM
5:51 AM - 7:21 AM

Action Rating: 5 out of 5

Wednesday, March 4, 2026

Weather Forecast

Patchy rain nearby
42.7°F
34.3°F
38.2°F
95%
0.17 in
88%
0%
14.5 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 8.26 μg/m3
PM10: 11.11 μg/m3
Carbon Monoxide: 169.53 μg/m3
Nitrogen Dioxide: 4.8 μg/m3
Sulphur Dioxide: 1.5 μg/m3
Ozone: 88 μg/m3

Astronomical

Sunrise: 6:18 AM
Sun Transit: 12:00 AM
Sunset: 5:42 PM
Daylight: 11 hrs 24 mins
Moonrise: 7:15 PM
Moon Transit: 12:31 AM
Moonset: 6:42 AM
Moon Phase: Full
Moon Illumination: 98.2%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 AM
2:51 PM - 5:21 PM

Minor Periods

6:45 PM - 8:15 PM
6:12 AM - 7:42 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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