Water Temperature of Norwalk Harbor in Norwalk, CT

Current Water Temperature

79.5°F

Measurement Time: Tuesday, July 15, 2025, 2:00 PM EDT

Temperature Locations

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Local Points of Interest

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

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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 / 0 meters

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 (2.0 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 (7.0 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 (29.0 mi)

Weather for Norwalk, Connecticut

Current Weather

84°F
Sunny
Conditions: Sunny
Humidity: 70%
Feels Like: 91.3°F
Wind: S 6.7 mph
Wind Gusts: 11 mph
Pressure: 30.03 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0.3

Five Day Weather Forecast

Partly Cloudy
Tue
H: 88°F
L: 73°F
Fog
Wed
H: 85°F
L: 73°F
Moderate rain
Thu
H: 91°F
L: 75°F
Partly Cloudy
Fri
H: 86°F
L: 72°F
Sunny
Sat
H: 81°F
L: 63°F

Air Quality

AQI: 1 - Good
PM2.5: 24.05 μg/m3
PM10: 24.61 μg/m3
Carbon Monoxide: 462.5 μg/m3
Nitrogen Dioxide: 57.91 μg/m3
Sulphur Dioxide: 11.29 μg/m3
Ozone: 80 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 1:00 PM
Sunset: 8:25 PM
Daylight: 14 hrs 51 mins
Moonrise: 11:11 PM
Moon Transit: 4:37 AM
Moonset: 10:38 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

4:07 AM - 6:37 AM
12:00 AM - 12:00 AM

Minor Periods

12:00 AM - 12:00 AM
10:08 AM - 11:38 AM

Action Rating: 2 out of 5

Heat Advisory issued July 15 at 2:14PM EDT until July 17 at 10:00PM EDT by NWS Upton NY

Effective: Tue July 15, 2025, 2:14 PM
Expires: Wed July 16, 2025, 5:00 AM

* WHAT...Heat index values up to 102 expected. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From 11 AM Wednesday to 10 PM EDT Thursday. The highest heat index values will occur during the afternoon each day. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

A Heat Advisory is issued when the combination of heat and humidity is expected to make it feel like it is 95 to 99 degrees for two or more consecutive days, or 100 to 104 degrees for any length of time. Seniors and those with chronic health problems or mental health conditions are at an increased risk. Homes without air conditioning can be much hotter than outdoor temperatures. Use air conditioning to stay cool at home or go to a place that has air conditioning. If you don't have home air conditioning, continue to seek out cool spaces each day as long as it remains hot, and for a few days after if your home is still hot. Check on vulnerable friends, family members and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! In cases of heat stroke call 9 1 1.


Heat Advisory issued July 15 at 2:14PM EDT until July 17 at 10:00PM EDT by NWS Upton NY

Effective: Tue July 15, 2025, 2:14 PM
Expires: Wed July 16, 2025, 5:00 AM

* WHAT...Heat index values up to 102 expected. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From 11 AM Wednesday to 10 PM EDT Thursday. The highest heat index values will occur during the afternoon each day. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

A Heat Advisory is issued when the combination of heat and humidity is expected to make it feel like it is 95 to 99 degrees for two or more consecutive days, or 100 to 104 degrees for any length of time. Seniors and those with chronic health problems or mental health conditions are at an increased risk. Homes without air conditioning can be much hotter than outdoor temperatures. Use air conditioning to stay cool at home or go to a place that has air conditioning. If you don't have home air conditioning, continue to seek out cool spaces each day as long as it remains hot, and for a few days after if your home is still hot. Check on vulnerable friends, family members and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! In cases of heat stroke call 9 1 1.


Heat Advisory issued July 15 at 2:14PM EDT until July 17 at 10:00PM EDT by NWS Upton NY

Effective: Tue July 15, 2025, 2:14 PM
Expires: Wed July 16, 2025, 5:00 AM

* WHAT...Heat index values up to 102 expected. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From 11 AM Wednesday to 10 PM EDT Thursday. The highest heat index values will occur during the afternoon each day. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

A Heat Advisory is issued when the combination of heat and humidity is expected to make it feel like it is 95 to 99 degrees for two or more consecutive days, or 100 to 104 degrees for any length of time. Seniors and those with chronic health problems or mental health conditions are at an increased risk. Homes without air conditioning can be much hotter than outdoor temperatures. Use air conditioning to stay cool at home or go to a place that has air conditioning. If you don't have home air conditioning, continue to seek out cool spaces each day as long as it remains hot, and for a few days after if your home is still hot. Check on vulnerable friends, family members and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! In cases of heat stroke call 9 1 1.


Heat Advisory issued July 15 at 2:14PM EDT until July 17 at 10:00PM EDT by NWS Upton NY

Effective: Tue July 15, 2025, 2:14 PM
Expires: Wed July 16, 2025, 5:00 AM

* WHAT...Heat index values up to 102 expected. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From 11 AM Wednesday to 10 PM EDT Thursday. The highest heat index values will occur during the afternoon each day. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

A Heat Advisory is issued when the combination of heat and humidity is expected to make it feel like it is 95 to 99 degrees for two or more consecutive days, or 100 to 104 degrees for any length of time. Seniors and those with chronic health problems or mental health conditions are at an increased risk. Homes without air conditioning can be much hotter than outdoor temperatures. Use air conditioning to stay cool at home or go to a place that has air conditioning. If you don't have home air conditioning, continue to seek out cool spaces each day as long as it remains hot, and for a few days after if your home is still hot. Check on vulnerable friends, family members and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! In cases of heat stroke call 9 1 1.


Heat Advisory issued July 15 at 2:14PM EDT until July 17 at 10:00PM EDT by NWS Upton NY

Effective: Tue July 15, 2025, 2:14 PM
Expires: Wed July 16, 2025, 5:00 AM

* WHAT...Heat index values up to 102 expected. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From 11 AM Wednesday to 10 PM EDT Thursday. The highest heat index values will occur during the afternoon each day. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

A Heat Advisory is issued when the combination of heat and humidity is expected to make it feel like it is 95 to 99 degrees for two or more consecutive days, or 100 to 104 degrees for any length of time. Seniors and those with chronic health problems or mental health conditions are at an increased risk. Homes without air conditioning can be much hotter than outdoor temperatures. Use air conditioning to stay cool at home or go to a place that has air conditioning. If you don't have home air conditioning, continue to seek out cool spaces each day as long as it remains hot, and for a few days after if your home is still hot. Check on vulnerable friends, family members and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! In cases of heat stroke call 9 1 1.


Tuesday, July 15, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 78.6°F
Average Humidity: 85%
Chance of Rain: 0%
Wind: 6.9 mph
UV Index: 2.5

Air Quality

AQI: 2 - Moderate
PM2.5: 23.27 μg/m3
PM10: 23.87 μg/m3
Carbon Monoxide: 403.89 μg/m3
Nitrogen Dioxide: 40.32 μg/m3
Sulphur Dioxide: 9.26 μg/m3
Ozone: 86.96 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 1:00 PM
Sunset: 8:25 PM
Daylight: 14 hrs 51 mins
Moonrise: 11:11 PM
Moon Transit: 4:37 AM
Moonset: 10:38 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

4:07 AM - 6:37 AM
12:00 AM - 12:00 AM

Minor Periods

12:00 AM - 12:00 AM
10:08 AM - 11:38 AM

Action Rating: 2 out of 5

Wednesday, July 16, 2025

Weather Forecast

Conditions: Fog
Average Temperature: 77.4°F
Average Humidity: 89%
Chance of Rain: 0%
Wind: 11.9 mph
UV Index: 2.3

Air Quality

AQI: 2 - Moderate
PM2.5: 39.01 μg/m3
PM10: 39.49 μg/m3
Carbon Monoxide: 504.09 μg/m3
Nitrogen Dioxide: 41.03 μg/m3
Sulphur Dioxide: 11.83 μg/m3
Ozone: 125.64 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:00 PM
Sunset: 8:24 PM
Daylight: 14 hrs 49 mins
Moonrise: 12:11 AM
Moon Transit: 1:15 AM
Moonset: 11:49 AM
Moon Phase: Waning Gibbous
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

12:45 AM - 3:15 AM
12:45 AM - 3:15 AM

Minor Periods

11:19 AM - 12:49 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 17, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 81.1°F
Average Humidity: 83%
Chance of Rain: 88%
Wind: 12.1 mph
UV Index: 2.4

Air Quality

AQI: 2 - Moderate
PM2.5: 28.01 μg/m3
PM10: 28.15 μg/m3
Carbon Monoxide: 383.39 μg/m3
Nitrogen Dioxide: 28.51 μg/m3
Sulphur Dioxide: 8.75 μg/m3
Ozone: 109.84 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 1:00 PM
Sunset: 8:23 PM
Daylight: 14 hrs 48 mins
Moonrise: 12:34 AM
Moon Transit: 6:11 AM
Moonset: 1:02 PM
Moon Phase: Last Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

5:41 AM - 8:11 AM
8:23 PM - 10:53 PM

Minor Periods

12:32 AM - 2:02 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Friday, July 18, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 78.9°F
Average Humidity: 68%
Chance of Rain: 0%
Wind: 10.3 mph
UV Index: 1.9

Air Quality

AQI: 2 - Moderate
PM2.5: 17.15 μg/m3
PM10: 17.24 μg/m3
Carbon Monoxide: 404.41 μg/m3
Nitrogen Dioxide: 15.94 μg/m3
Sulphur Dioxide: 5.71 μg/m3
Ozone: 99.76 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:00 PM
Sunset: 8:23 PM
Daylight: 14 hrs 46 mins
Moonrise: 12:59 AM
Moon Transit: 7:01 AM
Moonset: 2:18 PM
Moon Phase: Last Quarter
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

6:31 AM - 9:01 AM
9:15 PM - 11:45 PM

Minor Periods

1:48 PM - 3:18 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, July 19, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 72.6°F
Average Humidity: 62%
Chance of Rain: 0%
Wind: 8.3 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 7.22 μg/m3
PM10: 7.24 μg/m3
Carbon Monoxide: 405.43 μg/m3
Nitrogen Dioxide: 19.14 μg/m3
Sulphur Dioxide: 2.76 μg/m3
Ozone: 65.38 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:00 PM
Sunset: 8:22 PM
Daylight: 14 hrs 44 mins
Moonrise: 12:28 AM
Moon Transit: 7:54 AM
Moonset: 3:35 PM
Moon Phase: Last Quarter
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

7:24 AM - 9:54 AM
12:00 AM - 12:00 AM

Minor Periods

3:05 PM - 4:35 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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