Water Temperature of the Mill River in Southport, CT

Current Water Temperature

49.5°F

Measurement Time: Thursday, April 18, 2024, 5:06 AM EDT

Temperature Locations

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Local Points of Interest

Perry's Green

Mill River

Station Name: MILL RIVER AT PEQUOT YACHT CLUB AT SOUTHPORT, CT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet

Nearest Address:
657 Harbor Rd
Southport, CT 06890
Fairfield County

GPS Coordinates: 41.1325083, -73.2824833

Nearby Water Temperatures

Mill River, Fairfield, CT (0.6 mi)
Saugatuck River, Westport Village, CT (4.6 mi)
Rooster River, Bridgeport, CT (4.6 mi)
Saugatuck River, Westport, CT (4.8 mi)
Bridgeport Harbor, Bridgeport, CT (6 mi)
Norwalk River, Norwalk, CT (6.8 mi)
Norwalk Harbor, Norwalk, CT (7 mi)
Norwalk River, Norwalk, CT (7.3 mi)
Housatonic River, Stratford, CT (9.2 mi)
Flax Pond, Old Field, NY (13.8 mi)
New Haven Harbor, New Haven, CT (22.1 mi)
Frost Creek, Lattingtown, NY (22.6 mi)
Naugatuck River, Beacon Falls, CT (24.3 mi)
East Creek, Sands Point, NY (28.9 mi)
Great South Bay, West Sayville, NY (30.1 mi)

Weather for Southport, Connecticut

Current Weather

74.1°F
Mist
Mist
81.1°F
78.7°F
97%
S 4.3 mph
7.8 mph
74.1°F
73.1°F
0 in
85%
3 mi
1020 mbar
0

Five Day Weather Forecast

Mist
Thu
H: 89°F
L: 73°F
Sunny
Fri
H: 92°F
L: 71°F
Sunny
Sat
H: 88°F
L: 71°F
Sunny
Sun
H: 90°F
L: 73°F
Sunny
Mon
H: 87°F
L: 71°F

Air Quality

AQI: 1 - Good
PM2.5: 6.6 μg/m3
PM10: 8.6 μg/m3
Carbon Monoxide: 105 μg/m3
Nitrogen Dioxide: 8.8 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 53 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 1:00 PM
Sunset: 8:04 PM
Daylight: 14 hrs 10 mins
Moonrise: 12:17 AM
Moon Transit: 6:51 AM
Moonset: 2:39 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

6:21 AM - 8:51 AM
9:09 PM - 11:39 PM

Minor Periods

2:09 PM - 3:39 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Air Quality Alert issued August 5 at 3:26PM EDT by NWS Upton NY

Effective: Wed August 5, 2026, 3:26 PM
Expires: Fri August 7, 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 and southern New Haven. from 11 AM to 11 PM EDT Thursday. 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


Heat Advisory issued August 5 at 1:53PM EDT until August 7 at 8:00PM EDT by NWS Upton NY

Effective: Wed August 5, 2026, 1:53 PM
Expires: Thu August 6, 2026, 2:00 AM

* WHAT...Heat index values up to around 100 expected. * WHERE...Northern Fairfield, Northern Middlesex, Northern New Haven, Northern New London, Southern Fairfield, Southern Middlesex, Southern New Haven, and Southern New London Counties. * WHEN...From 11 AM Thursday to 8 PM EDT Friday. * 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! Call 9 1 1.


Heat Advisory issued August 5 at 1:44PM EDT until August 7 at 8:00PM EDT by NWS Upton NY

Effective: Wed August 5, 2026, 1:44 PM
Expires: Thu August 6, 2026, 2:30 AM

* WHAT...Heat index values up to around 10 expected. * WHERE...Northern Fairfield, Northern Middlesex, Northern New Haven, Northern New London, Southern Fairfield, Southern Middlesex, Southern New Haven, and Southern New London Counties. * WHEN...From 11 AM Thursday to 8 PM EDT Friday. * 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! Call 9 1 1.


Thursday, August 6, 2026

Weather Forecast

Mist
88.9°F
72.9°F
79.6°F
82%
0.01 in
29%
0%
10.7 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 9.84 μg/m3
PM10: 11.05 μg/m3
Carbon Monoxide: 152.5 μg/m3
Nitrogen Dioxide: 8.51 μg/m3
Sulphur Dioxide: 1.71 μg/m3
Ozone: 95.33 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 1:00 PM
Sunset: 8:04 PM
Daylight: 14 hrs 10 mins
Moonrise: 12:17 AM
Moon Transit: 6:51 AM
Moonset: 2:39 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

6:21 AM - 8:51 AM
9:09 PM - 11:39 PM

Minor Periods

2:09 PM - 3:39 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, August 7, 2026

Weather Forecast

Sunny
91.7°F
71.1°F
80.6°F
74%
0.23 in
68%
0%
9.8 mph
8.4


Air Quality

AQI: 1 - Good
PM2.5: 11 μg/m3
PM10: 11.25 μg/m3
Carbon Monoxide: 199.38 μg/m3
Nitrogen Dioxide: 11.35 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 107.25 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 12:58 AM
Sunset: 8:02 PM
Daylight: 14 hrs 8 mins
Moonrise: 12:56 AM
Moon Transit: 7:50 AM
Moonset: 3:54 PM
Moon Phase: Last Quarter
Moon Illumination: 22.2%

Best Times for Fishing or Hunting

Major Periods

7:20 AM - 9:50 AM
12:00 AM - 12:00 AM

Minor Periods

3:24 PM - 4:54 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, August 8, 2026

Weather Forecast

Sunny
88.2°F
70.9°F
78.8°F
74%
0.06 in
57%
0%
9.6 mph
8.2


Air Quality

AQI: 1 - Good
PM2.5: 9.92 μg/m3
PM10: 9.98 μg/m3
Carbon Monoxide: 181.75 μg/m3
Nitrogen Dioxide: 9.49 μg/m3
Sulphur Dioxide: 1.63 μg/m3
Ozone: 102.58 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 12:58 AM
Sunset: 8:01 PM
Daylight: 14 hrs 5 mins
Moonrise: 12:45 AM
Moon Transit: 8:52 AM
Moonset: 5:04 PM
Moon Phase: Waning Crescent
Moon Illumination: 13.6%

Best Times for Fishing or Hunting

Major Periods

8:22 AM - 10:52 AM
12:00 AM - 12:00 AM

Minor Periods

4:34 PM - 6:04 PM
12:15 AM - 1:45 AM

Action Rating: 2 out of 5

Sunday, August 9, 2026

Weather Forecast

Sunny
90.4°F
73.2°F
81.2°F
64%
0 in
5%
0%
7.2 mph
8.1


Air Quality

AQI: 1 - Good
PM2.5: 10.16 μg/m3
PM10: 10.4 μg/m3
Carbon Monoxide: 192.25 μg/m3
Nitrogen Dioxide: 8.53 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 92.54 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 12:58 AM
Sunset: 8:00 PM
Daylight: 14 hrs 3 mins
Moonrise: 1:46 AM
Moon Transit: 9:57 AM
Moonset: 6:05 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:27 AM - 11:57 AM

Minor Periods

5:35 PM - 7:05 PM
1:16 AM - 2:46 AM

Action Rating: 2 out of 5

Monday, August 10, 2026

Weather Forecast

Sunny
86.8°F
70.8°F
78.2°F
61%
0.12 in
57%
0%
5.1 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 14.29 μg/m3
PM10: 14.42 μg/m3
Carbon Monoxide: 339.44 μg/m3
Nitrogen Dioxide: 17.79 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 52 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 12:58 AM
Sunset: 7:59 PM
Daylight: 14 hrs 1 mins
Moonrise: 3:00 AM
Moon Transit: 11:01 AM
Moonset: 6:54 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
10:31 AM - 1:01 PM

Minor Periods

6:24 PM - 7:54 PM
2:30 AM - 4:00 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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