Water Temperature of Norwalk Harbor in Norwalk, CT

Current Water Temperature

71.2°F

Measurement Time: Friday, July 17, 2026, 1:54 PM EDT

Temperature Locations

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Local Points of Interest

Sheffield Island Harbor; Calf Pasture and Shady Beach; Long Island Sound

Norwalk Harbor

Station Name: NORWALK HARBOR AT THE COVE MARINA NR E NORWALK, CT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet

Nearest Address:
52 Calf Pasture Beach Rd
Norwalk, CT 06855
Fairfield County

GPS Coordinates: 41.08395, -73.3999861

Nearby Water Temperatures

Norwalk River, Norwalk, CT (1.5 mi)
Norwalk River, Norwalk, CT (2 mi)
Saugatuck River, Westport, CT (2.2 mi)
Saugatuck River, Westport Village, CT (3.2 mi)
Mill River, Fairfield, CT (6.5 mi)
Mill River, Southport, CT (7 mi)
Rooster River, Bridgeport, CT (11.5 mi)
Bridgeport Harbor, Bridgeport, CT (12.9 mi)
Flax Pond, Old Field, NY (15.8 mi)
Frost Creek, Lattingtown, NY (15.9 mi)
Housatonic River, Stratford, CT (16.2 mi)
East Creek, Sands Point, NY (22.1 mi)
Long Island Sound, Kings Point, NY (26.8 mi)
Hudson River, Yonkers, NY (28.2 mi)
New Haven Harbor, New Haven, CT (29 mi)

Weather for Norwalk, Connecticut

Current Weather

87.1°F
Partly cloudy
Partly cloudy
84.6°F
86.5°F
23%
NW 6.9 mph
9.8 mph
88.9°F
50.7°F
0 in
75%
9 mi
1016 mbar
1.1

Five Day Weather Forecast

Sunny
Fri
H: 92°F
L: 66°F
Sunny
Sat
H: 81°F
L: 68°F
Sunny
Sun
H: 80°F
L: 66°F
Sunny
Mon
H: 80°F
L: 60°F
Partly Cloudy
Tue
H: 78°F
L: 67°F

Air Quality

AQI: 2 - Moderate
PM2.5: 6 μg/m3
PM10: 6.1 μg/m3
Carbon Monoxide: 146 μg/m3
Nitrogen Dioxide: 5.3 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 96 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 1:00 PM
Sunset: 8:24 PM
Daylight: 14 hrs 48 mins
Moonrise: 9:21 AM
Moon Transit: 4:01 PM
Moonset: 10:29 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

5:24 AM - 7:54 AM
3:31 PM - 6:01 PM

Minor Periods

9:59 PM - 11:29 PM
8:51 AM - 10:21 AM

Action Rating: 3 out of 5

Air Quality Alert issued July 17 at 3:28PM EDT by NWS Upton NY

Effective: Fri July 17, 2026, 3:28 PM
Expires: Sun July 19, 2026, 12:00 AM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex, New London. until midnight EDT Saturday night. An Air Quality Action Day means that Fine Particulates within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued July 17 at 3:20PM EDT by NWS Upton NY

Effective: Fri July 17, 2026, 3:20 PM
Expires: Sat July 18, 2026, 3:30 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex, New London. until midnight EDT tonight. An Air Quality Action Day means that Fine Particulates within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued July 17 at 2:45PM EDT by NWS Upton NY

Effective: Fri July 17, 2026, 2:45 PM
Expires: Sat July 18, 2026, 2:45 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex, New London. until midnight EDT tonight. An Air Quality Action Day means that Fine Particulates within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued July 17 at 9:51AM EDT by NWS Upton NY

Effective: Fri July 17, 2026, 9:51 AM
Expires: Sat July 18, 2026, 12:00 AM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex, New London. until midnight EDT tonight. An Air Quality Action Day means that Fine Particulates within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi


Air Quality Alert issued July 17 at 7:46AM EDT by NWS Upton NY

Effective: Fri July 17, 2026, 7:46 AM
Expires: Sat July 18, 2026, 12:00 AM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, Middlesex, New London until midnight EDT tonight. An Air Quality Action Day means that Fine Particulates within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi
Friday, July 17, 2026

Weather Forecast

Sunny
92.3°F
65.8°F
79.2°F
46%
0 in
1%
0%
6.9 mph
8.2


Air Quality

AQI: 2 - Moderate
PM2.5: 17.58 μg/m3
PM10: 18.07 μg/m3
Carbon Monoxide: 152.42 μg/m3
Nitrogen Dioxide: 8.58 μg/m3
Sulphur Dioxide: 0.87 μg/m3
Ozone: 83.21 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 1:00 PM
Sunset: 8:24 PM
Daylight: 14 hrs 48 mins
Moonrise: 9:21 AM
Moon Transit: 4:01 PM
Moonset: 10:29 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

5:24 AM - 7:54 AM
3:31 PM - 6:01 PM

Minor Periods

9:59 PM - 11:29 PM
8:51 AM - 10:21 AM

Action Rating: 3 out of 5

Saturday, July 18, 2026

Weather Forecast

Sunny
81.2°F
68°F
73°F
82%
0.23 in
74%
0%
18.8 mph
3.2


Air Quality

AQI: 2 - Moderate
PM2.5: 26.2 μg/m3
PM10: 27.7 μg/m3
Carbon Monoxide: 158.25 μg/m3
Nitrogen Dioxide: 16.68 μg/m3
Sulphur Dioxide: 1.96 μg/m3
Ozone: 93.96 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 1:00 PM
Sunset: 8:23 PM
Daylight: 14 hrs 46 mins
Moonrise: 10:32 AM
Moon Transit: 4:46 PM
Moonset: 10:51 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

6:11 AM - 8:41 AM
4:16 PM - 6:46 PM

Minor Periods

10:21 PM - 11:51 PM
10:02 AM - 11:32 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
80.4°F
65.5°F
73.4°F
64%
0.08 in
57%
0%
14.5 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 4.31 μg/m3
PM10: 4.35 μg/m3
Carbon Monoxide: 152.51 μg/m3
Nitrogen Dioxide: 3.97 μg/m3
Sulphur Dioxide: 0.58 μg/m3
Ozone: 84.88 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:00 PM
Sunset: 8:22 PM
Daylight: 14 hrs 45 mins
Moonrise: 11:39 AM
Moon Transit: 5:30 PM
Moonset: 11:12 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

6:55 AM - 9:25 AM
5:00 PM - 7:30 PM

Minor Periods

12:00 AM - 12:00 AM
11:09 AM - 12:39 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
80.3°F
59.8°F
70.3°F
47%
0 in
2%
0%
10.7 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 9.28 μg/m3
PM10: 9.68 μg/m3
Carbon Monoxide: 187.38 μg/m3
Nitrogen Dioxide: 7.6 μg/m3
Sulphur Dioxide: 0.82 μg/m3
Ozone: 85.58 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:00 PM
Sunset: 8:21 PM
Daylight: 14 hrs 43 mins
Moonrise: 12:45 AM
Moon Transit: 6:13 PM
Moonset: 12:12 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:39 AM - 10:09 AM
5:43 PM - 8:13 PM

Minor Periods

12:15 AM - 1:45 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, July 21, 2026

Weather Forecast

Partly Cloudy
78°F
67.4°F
71.7°F
82%
0.66 in
81%
0%
14.3 mph
5.1


Air Quality

AQI: 2 - Moderate
PM2.5: 15.96 μg/m3
PM10: 19.34 μg/m3
Carbon Monoxide: 202.11 μg/m3
Nitrogen Dioxide: 17.99 μg/m3
Sulphur Dioxide: 1.59 μg/m3
Ozone: 61 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:00 PM
Sunset: 8:21 PM
Daylight: 14 hrs 42 mins
Moonrise: 1:49 PM
Moon Transit: 6:58 PM
Moonset: 12:34 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

8:22 AM - 10:52 AM
6:28 PM - 8:58 PM

Minor Periods

1:19 PM - 2:49 PM
12:00 AM - 12:00 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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