Water Temperature of Norwalk Harbor in Norwalk, CT

Current Water Temperature

76.1°F

Measurement Time: Friday, July 31, 2026, 2:54 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

76.3°F
Sunny
Sunny
79.7°F
80°F
81%
SSW 7.6 mph
16 mph
76.3°F
70.1°F
0 in
0%
6 mi
1013 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 86°F
L: 64°F
Sunny
Sat
H: 86°F
L: 68°F
Sunny
Sun
H: 83°F
L: 71°F
Light rain shower
Mon
H: 79°F
L: 73°F
Light rain shower
Tue
H: 80°F
L: 73°F

Air Quality

AQI: 1 - Good
PM2.5: 8.8 μg/m3
PM10: 8.8 μg/m3
Carbon Monoxide: 197 μg/m3
Nitrogen Dioxide: 21 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 55 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:00 PM
Sunset: 8:11 PM
Daylight: 14 hrs 23 mins
Moonrise: 9:18 PM
Moon Transit: 2:14 AM
Moonset: 7:42 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:44 AM - 4:14 AM
4:23 PM - 6:53 PM

Minor Periods

8:48 PM - 10:18 PM
7:12 AM - 8:42 AM

Action Rating: 3 out of 5

Air Quality Alert issued July 31 at 4:01PM EDT by NWS Upton NY

Effective: Fri July 31, 2026, 4:01 PM
Expires: Sat August 1, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Southern Fairfield, from 11 AM to 11 PM EDT Saturday. An Air Quality Action Day means that Ground Level Ozone 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 31, 2026

Weather Forecast

Sunny
85.6°F
64.4°F
74.1°F
81%
0 in
10%
0%
8.5 mph
8.2


Air Quality

AQI: 1 - Good
PM2.5: 11.02 μg/m3
PM10: 11.26 μg/m3
Carbon Monoxide: 164.42 μg/m3
Nitrogen Dioxide: 14.03 μg/m3
Sulphur Dioxide: 0.69 μg/m3
Ozone: 64.75 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:00 PM
Sunset: 8:11 PM
Daylight: 14 hrs 23 mins
Moonrise: 9:18 PM
Moon Transit: 2:14 AM
Moonset: 7:42 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:44 AM - 4:14 AM
4:23 PM - 6:53 PM

Minor Periods

8:48 PM - 10:18 PM
7:12 AM - 8:42 AM

Action Rating: 3 out of 5

Saturday, August 1, 2026

Weather Forecast

Sunny
86.1°F
68°F
76.4°F
70%
0 in
6%
0%
12.1 mph
8.3


Air Quality

AQI: 2 - Moderate
PM2.5: 18.03 μg/m3
PM10: 18.43 μg/m3
Carbon Monoxide: 187.38 μg/m3
Nitrogen Dioxide: 22.99 μg/m3
Sulphur Dioxide: 2.07 μg/m3
Ozone: 83.5 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:00 PM
Sunset: 8:10 PM
Daylight: 14 hrs 21 mins
Moonrise: 9:39 PM
Moon Transit: 2:58 AM
Moonset: 8:48 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

2:28 AM - 4:58 AM
5:06 PM - 7:36 PM

Minor Periods

9:09 PM - 10:39 PM
8:18 AM - 9:48 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Sunny
82.5°F
71.4°F
76.6°F
74%
0.09 in
57%
0%
13 mph
8.4


Air Quality

AQI: 1 - Good
PM2.5: 11.04 μg/m3
PM10: 13.5 μg/m3
Carbon Monoxide: 126.13 μg/m3
Nitrogen Dioxide: 7.56 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 89.5 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:00 PM
Sunset: 8:09 PM
Daylight: 14 hrs 18 mins
Moonrise: 10:00 PM
Moon Transit: 3:40 AM
Moonset: 9:53 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:10 AM - 5:40 AM
5:49 PM - 8:19 PM

Minor Periods

9:30 PM - 11:00 PM
9:23 AM - 10:53 AM

Action Rating: 4 out of 5

Monday, August 3, 2026

Weather Forecast

Light rain shower
78.7°F
72.5°F
74.6°F
94%
1.99 in
92%
0%
10.3 mph
5.8


Air Quality

AQI: 1 - Good
PM2.5: 5.87 μg/m3
PM10: 7.25 μg/m3
Carbon Monoxide: 141.71 μg/m3
Nitrogen Dioxide: 7.52 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 62.29 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 1:00 PM
Sunset: 8:08 PM
Daylight: 14 hrs 16 mins
Moonrise: 10:23 PM
Moon Transit: 12:00 AM
Moonset: 11:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
6:33 PM - 9:03 PM

Minor Periods

9:53 PM - 11:23 PM
10:31 AM - 12:01 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Light rain shower
80.4°F
72.5°F
75.1°F
90%
0.46 in
90%
0%
11.2 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 4.53 μg/m3
PM10: 4.8 μg/m3
Carbon Monoxide: 170.56 μg/m3
Nitrogen Dioxide: 10.34 μg/m3
Sulphur Dioxide: 1.49 μg/m3
Ozone: 51 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:00 PM
Sunset: 8:07 PM
Daylight: 14 hrs 14 mins
Moonrise: 10:48 PM
Moon Transit: 5:09 AM
Moonset: 12:10 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

4:39 AM - 7:09 AM
7:21 PM - 9:51 PM

Minor Periods

10:18 PM - 11:48 PM
11:40 AM - 1:10 PM

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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