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

12.9°F
Sunny
Sunny
0.8°F
7.9°F
58%
WNW 8.9 mph
13 mph
-4.5°F
-7.7°F
0 in
0%
9 mi
1019 mbar
0.6

Five Day Weather Forecast

Sunny
Thu
H: 25°F
L: 5°F
Sunny
Fri
H: 24°F
L: 0°F
Sunny
Sat
H: 25°F
L: 8°F
Blizzard
Sun
H: 25°F
L: 17°F
Partly Cloudy
Mon
H: 30°F
L: 15°F

Air Quality

AQI: 1 - Good
PM2.5: 10.05 μg/m3
PM10: 10.15 μg/m3
Carbon Monoxide: 231.85 μg/m3
Nitrogen Dioxide: 7.35 μg/m3
Sulphur Dioxide: 2.65 μg/m3
Ozone: 73 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:06 AM
Sunset: 5:06 PM
Daylight: 10 hrs mins
Moonrise: 1:13 PM
Moon Transit: 9:26 PM
Moonset: 4:34 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

10:43 AM - 1:13 PM
8:56 PM - 11:26 PM

Minor Periods

12:43 AM - 2:13 PM
4:04 AM - 5:34 AM

Action Rating: 2 out of 5

Cold Weather Advisory issued January 29 at 12:51AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...Very cold wind chills as low as 14 below expected. * WHERE...Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. * WHEN...From midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Cold Weather Advisory issued January 29 at 5:44AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 5:44 AM
Expires: Thu January 29, 2026, 2:00 PM

* WHAT...Very cold wind chills as low as 12 below expected. * WHERE...Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. * WHEN...From midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 12:51AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...For the first Cold Weather Advisory, very cold wind chills as low as 10 below expected. For the second Cold Weather Advisory, very cold wind chills as low as 15 below expected. * WHERE...Northern Westchester, Putnam, Rockland, and Southern Westchester Counties. * WHEN...For the first Cold Weather Advisory, until 10 AM EST this morning. For the second Cold Weather Advisory, from midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Cold Weather Advisory issued January 29 at 12:51AM EST until January 29 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...For the first Cold Weather Advisory, very cold wind chills as low as 10 below expected. For the second Cold Weather Advisory, very cold wind chills as low as 15 below expected. * WHERE...Northern Westchester, Putnam, Rockland, and Southern Westchester Counties. * WHEN...For the first Cold Weather Advisory, until 10 AM EST this morning. For the second Cold Weather Advisory, from midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Cold Weather Advisory issued January 29 at 5:44AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 5:44 AM
Expires: Thu January 29, 2026, 2:00 PM

* WHAT...Very cold wind chills as low as 10 to 14 below expected. * WHERE...Northern Westchester, Orange, Putnam, Rockland, and Southern Westchester Counties. * WHEN...From midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 12:51AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...Very cold wind chills as low as 7 below expected. * WHERE...Northeast Suffolk, Northwest Suffolk, Southeast Suffolk, and Southwest Suffolk Counties. * WHEN...From midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 5:44AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 5:44 AM
Expires: Thu January 29, 2026, 2:00 PM

* WHAT...Very cold wind chills as low as 6 below expected. * WHERE...Northeast Suffolk, Northwest Suffolk, Southeast Suffolk, and Southwest Suffolk Counties. * WHEN...From midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 12:51AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...For the first Cold Weather Advisory, very cold wind chills as low as 5 below expected. For the second Cold Weather Advisory, very cold wind chills as low as 8 below expected. * WHERE...Northern Nassau and Southern Nassau Counties. * WHEN...For the first Cold Weather Advisory, until 10 AM EST this morning. For the second Cold Weather Advisory, from midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 12:51AM EST until January 29 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...For the first Cold Weather Advisory, very cold wind chills as low as 5 below expected. For the second Cold Weather Advisory, very cold wind chills as low as 8 below expected. * WHERE...Northern Nassau and Southern Nassau Counties. * WHEN...For the first Cold Weather Advisory, until 10 AM EST this morning. For the second Cold Weather Advisory, from midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 5:44AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 5:44 AM
Expires: Thu January 29, 2026, 2:00 PM

* WHAT...Very cold wind chills as low as 6 below expected. * WHERE...Northern Nassau and Southern Nassau Counties. * WHEN...From midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 12:51AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...For the first Cold Weather Advisory, very cold wind chills as low as 6 below expected. For the second Cold Weather Advisory, very cold wind chills as low as 9 below expected. * WHERE...Bronx, Kings (Brooklyn), New York (Manhattan), Northern Queens, Richmond (Staten Island), and Southern Queens Counties. * WHEN...For the first Cold Weather Advisory, until 10 AM EST this morning. For the second Cold Weather Advisory, from midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 12:51AM EST until January 29 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...For the first Cold Weather Advisory, very cold wind chills as low as 6 below expected. For the second Cold Weather Advisory, very cold wind chills as low as 9 below expected. * WHERE...Bronx, Kings (Brooklyn), New York (Manhattan), Northern Queens, Richmond (Staten Island), and Southern Queens Counties. * WHEN...For the first Cold Weather Advisory, until 10 AM EST this morning. For the second Cold Weather Advisory, from midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 5:44AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 5:44 AM
Expires: Thu January 29, 2026, 2:00 PM

* WHAT...Very cold wind chills as low as 6 below expected. * WHERE...Bronx, Kings (Brooklyn), New York (Manhattan), Northern Queens, Richmond (Staten Island), and Southern Queens Counties. * WHEN...From midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 12:51AM EST until January 29 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...For the first Cold Weather Advisory, very cold wind chills as low as 10 below expected. For the second Cold Weather Advisory, very cold wind chills as low as 12 below expected. * WHERE...Eastern Bergen and Western Bergen Counties. * WHEN...For the first Cold Weather Advisory, until 10 AM EST this morning. For the second Cold Weather Advisory, from midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Cold Weather Advisory issued January 29 at 12:51AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 12:51 AM
Expires: Thu January 29, 2026, 9:15 AM

* WHAT...For the first Cold Weather Advisory, very cold wind chills as low as 10 below expected. For the second Cold Weather Advisory, very cold wind chills as low as 12 below expected. * WHERE...Eastern Bergen and Western Bergen Counties. * WHEN...For the first Cold Weather Advisory, until 10 AM EST this morning. For the second Cold Weather Advisory, from midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.


Cold Weather Advisory issued January 29 at 5:44AM EST until January 30 at 10:00AM EST by NWS Upton NY

Effective: Thu January 29, 2026, 5:44 AM
Expires: Thu January 29, 2026, 2:00 PM

* WHAT...Very cold wind chills as low as 11 below expected. * WHERE...Eastern Bergen, Eastern Passaic, Western Bergen, and Western Passaic Counties. * WHEN...From midnight tonight to 10 AM EST Friday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 29 at 12:30AM EST until January 30 at 11:00AM EST by NWS Albany NY

Effective: Thu January 29, 2026, 12:30 AM
Expires: Thu January 29, 2026, 5:00 PM

* WHAT...Very cold wind chills as low as 15 to 25 below expected. * WHERE...Northwestern Connecticut, western Massachusetts, and the Mohawk and Schoharie Valleys, Greater Capital Region, mid Hudson Valley, Taconics and Glens Falls-Saratoga Region of eastern New York. * WHEN...From 7 PM this evening to 11 AM EST Friday. * IMPACTS...The dangerously cold wind chills could result in hypothermia or frostbite if precautions are not taken. Frostbite can occur on exposed skin in as little as 30 minutes.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.
Thursday, January 29, 2026

Weather Forecast

Sunny
25°F
4.5°F
15.5°F
59%
0 in
0%
0%
13.4 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 15.51 μg/m3
PM10: 15.77 μg/m3
Carbon Monoxide: 281.41 μg/m3
Nitrogen Dioxide: 24.63 μg/m3
Sulphur Dioxide: 2.63 μg/m3
Ozone: 48.2 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:06 AM
Sunset: 5:06 PM
Daylight: 10 hrs mins
Moonrise: 1:13 PM
Moon Transit: 9:26 PM
Moonset: 4:34 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

10:43 AM - 1:13 PM
8:56 PM - 11:26 PM

Minor Periods

12:43 AM - 2:13 PM
4:04 AM - 5:34 AM

Action Rating: 2 out of 5

Friday, January 30, 2026

Weather Forecast

Sunny
23.7°F
0.3°F
17°F
66%
0 in
0%
0%
13.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 5.21 μg/m3
PM10: 5.32 μg/m3
Carbon Monoxide: 187.45 μg/m3
Nitrogen Dioxide: 9.42 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 66 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:06 AM
Sunset: 5:07 PM
Daylight: 10 hrs 2 mins
Moonrise: 2:24 PM
Moon Transit: 10:30 PM
Moonset: 5:36 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.4%

Best Times for Fishing or Hunting

Major Periods

11:48 AM - 2:18 PM
12:00 AM - 12:00 AM

Minor Periods

1:54 PM - 3:24 PM
5:06 AM - 6:36 AM

Action Rating: 3 out of 5

Saturday, January 31, 2026

Weather Forecast

Sunny
25°F
8.4°F
15.6°F
66%
0 in
0%
0%
17.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 6.79 μg/m3
PM10: 7.03 μg/m3
Carbon Monoxide: 207.01 μg/m3
Nitrogen Dioxide: 12.27 μg/m3
Sulphur Dioxide: 1.9 μg/m3
Ozone: 60.32 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:06 AM
Sunset: 5:09 PM
Daylight: 10 hrs 4 mins
Moonrise: 3:41 PM
Moon Transit: 11:30 PM
Moonset: 6:27 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.9%

Best Times for Fishing or Hunting

Major Periods

12:49 AM - 3:19 PM
12:00 AM - 12:00 AM

Minor Periods

3:11 PM - 4:41 PM
5:57 AM - 7:27 AM

Action Rating: 4 out of 5

Sunday, February 1, 2026

Weather Forecast

Blizzard
24.5°F
17.1°F
19.7°F
84%
0.37 in
69%
47%
28.6 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 4.96 μg/m3
PM10: 5.32 μg/m3
Carbon Monoxide: 187 μg/m3
Nitrogen Dioxide: 9.53 μg/m3
Sulphur Dioxide: 1.96 μg/m3
Ozone: 73.24 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:06 AM
Sunset: 5:10 PM
Daylight: 10 hrs 6 mins
Moonrise: 4:59 PM
Moon Transit: 12:00 AM
Moonset: 7:06 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:46 PM - 4:16 PM

Minor Periods

4:29 PM - 5:59 PM
6:36 AM - 8:06 AM

Action Rating: 4 out of 5

Monday, February 2, 2026

Weather Forecast

Partly Cloudy
30.4°F
15°F
21.5°F
76%
0 in
0%
0%
20.6 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 5.12 μg/m3
PM10: 5.5 μg/m3
Carbon Monoxide: 176.58 μg/m3
Nitrogen Dioxide: 7.08 μg/m3
Sulphur Dioxide: 2.22 μg/m3
Ozone: 81.77 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:06 AM
Sunset: 5:11 PM
Daylight: 10 hrs 8 mins
Moonrise: 6:15 PM
Moon Transit: 12:24 AM
Moonset: 7:36 AM
Moon Phase: Full
Moon Illumination: 99.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:38 PM - 5:08 PM

Minor Periods

5:45 PM - 7:15 PM
7:06 AM - 8:36 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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