Water Temperature of the Mill River in Southport, CT

Current Water Temperature

49.5°F 9.7°C
Frigid Dangerously Cold
49.5°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Severe hypothermia and cold water shock risk. Unprotected swimming causes rapid loss of dexterity in under 5 minutes.

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

Temperature Locations

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Local Points of Interest

Perry's Green

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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)

Marine Weather for the Mill River in Southport, CT

Marine Weather

Coastal & Marine Conditions
Open-Meteo Marine
0.9ft 0.3 m
Calm / Flat Smooth waters with minimal wave motion.
Wave Period 2.1s
Wave Direction 277° W
Swell Waves
0.1 ft
2.8s • 246° WSW
Wind Waves / Chop
0.8 ft
1.9s • 280° W
Ocean Current
0.2 mph
0.2 kn • 243° WSW
Sea Surface Temp
56.5°F
Equivalent: 13.6°C

High & Low Tide Forecast

Falling (Ebb)
Next Tide: Low 3:00 AM (-4.2 ft)
0.0 ft (MSL) Fri, Nov 13 12 AM 6 AM 12 PM 6 PM 12 AM 6 AM Sat, Nov 14 Sun, Nov 15 ▲ High 8:00 PM +2.1 ft ▼ Low 2:00 AM -3.8 ft ▲ High 8:00 AM +2.2 ft ▼ Low 3:00 PM -4.5 ft ▲ High 9:00 PM +1.1 ft ▼ Low 3:00 AM -4.2 ft NOW
High Tide Fri, Nov 13
8:00 PM
+2.1 ft (0.64 m)
Low Tide Sat, Nov 14
2:00 AM
-3.8 ft (-1.17 m)
High Tide Sat, Nov 14
8:00 AM
+2.2 ft (0.68 m)
Low Tide Sat, Nov 14
3:00 PM
-4.5 ft (-1.37 m)
Open-Meteo Tidal Model (Mean Sea Level MSL datum) • Times in station local timezone.

5-Day Marine Wave Forecast

Today
Nov 14
0.9 ft
2.9s • NNW
Sun
Nov 15
1.0 ft
2.4s • NW
Mon
Nov 16
0.5 ft
2.2s • N
Tue
Nov 17
0.2 ft
2.2s • NW
Wed
Nov 18
0.3 ft
2s • SW

Weather for Southport, Connecticut

Current Weather

39.4°F
Mainly Clear
Conditions: Mainly Clear
Humidity: 77%
Feels Like: 32.2°F
Wind: WNW 8.3 mph
Wind Gusts: 21.3 mph
Pressure: 29.88 in
Precipitation: 0 in
Cloud Cover: 34%
Visibility: 12.1 mi
UV Index: 0

Five-Day Weather Forecast

Overcast
Sat
H: 45°F
L: 35°F
Overcast
Sun
H: 47°F
L: 34°F
Overcast
Mon
H: 47°F
L: 35°F
Sunny
Tue
H: 54°F
L: 38°F
Partly Cloudy
Wed
H: 59°F
L: 42°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
2.9 μg/m³
Good
PM10
2.9 μg/m³
Good
Ozone (O3)
37 μg/m³
Photochemical
NO2
11.9 μg/m³
Nitrogen Dioxide
SO2
0.6 μg/m³
Sulfur Dioxide
CO
140 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 55m daylight
Sunrise 6:40 AM
Solar Noon 11:37 AM
Sunset 4:35 PM
Moon
Waxing Crescent • 21%
Moonrise 11:28 AM
Transit 4:02 PM
Moonset 8:42 PM

Best Times for Fishing or Hunting

Major Periods

3:08 AM - 5:38 AM
3:32 PM - 6:02 PM

Minor Periods

10:58 AM - 12:28 PM
8:12 PM - 9:42 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 40.1°F
Average Humidity: 64%
Chance of Rain: 4%
Wind: 12.1 mph
UV Index: 3

Air Quality

EPA Index 1 • Good
PM2.5
3.1 μg/m³
Good
PM10
3.1 μg/m³
Good
Ozone (O3)
48.8 μg/m³
Photochemical
NO2
7 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
133.5 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 55m daylight
Sunrise 6:40 AM
Solar Noon 11:37 AM
Sunset 4:35 PM
Moon
Waxing Crescent • 21%
Moonrise 11:28 AM
Transit 4:02 PM
Moonset 8:42 PM

Best Times for Fishing or Hunting

Major Periods

3:08 AM - 5:38 AM
3:32 PM - 6:02 PM

Minor Periods

10:58 AM - 12:28 PM
8:12 PM - 9:42 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 39.6°F
Average Humidity: 69%
Chance of Rain: 4%
Wind: 12.4 mph
UV Index: 3.1

Air Quality

EPA Index 1 • Good
PM2.5
1.2 μg/m³
Good
PM10
1.2 μg/m³
Good
Ozone (O3)
55 μg/m³
Photochemical
NO2
4.6 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
132.2 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 53m daylight
Sunrise 6:41 AM
Solar Noon 11:37 AM
Sunset 4:34 PM
Moon
Waxing Crescent • 31%
Moonrise 12:00 PM
Transit 4:48 PM
Moonset 9:45 PM

Best Times for Fishing or Hunting

Major Periods

3:55 AM - 6:25 AM
4:18 PM - 6:48 PM

Minor Periods

11:30 AM - 1:00 PM
9:15 PM - 10:45 PM
Action Rating:
Very Good 4/5
Monday, November 16, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 40.6°F
Average Humidity: 69%
Chance of Rain: 1%
Wind: 11.4 mph
UV Index: 3

Air Quality

EPA Index 1 • Good
PM2.5
3.1 μg/m³
Good
PM10
3.2 μg/m³
Good
Ozone (O3)
54.4 μg/m³
Photochemical
NO2
10.4 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
146.7 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 51m daylight
Sunrise 6:42 AM
Solar Noon 11:37 AM
Sunset 4:34 PM
Moon
First Quarter • 42%
Moonrise 12:27 PM
Transit 5:33 PM
Moonset 10:49 PM

Best Times for Fishing or Hunting

Major Periods

4:41 AM - 7:11 AM
5:03 PM - 7:33 PM

Minor Periods

11:57 AM - 1:27 PM
10:19 PM - 11:49 PM
Action Rating:
Very Good 4/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 45.1°F
Average Humidity: 58%
Chance of Rain: 0%
Wind: 7.3 mph
UV Index: 3

Air Quality

EPA Index 1 • Good
PM2.5
7.5 μg/m³
Good
PM10
7.7 μg/m³
Good
Ozone (O3)
46 μg/m³
Photochemical
NO2
15.2 μg/m³
Nitrogen Dioxide
SO2
1.5 μg/m³
Sulfur Dioxide
CO
208.6 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 49m daylight
Sunrise 6:44 AM
Solar Noon 11:38 AM
Sunset 4:33 PM
Moon
First Quarter • 54%
Moonrise 12:50 PM
Transit 6:16 PM
Moonset 11:52 PM

Best Times for Fishing or Hunting

Major Periods

5:24 AM - 7:54 AM
5:46 PM - 8:16 PM

Minor Periods

12:20 PM - 1:50 PM
11:22 PM - 12:52 AM
Action Rating:
Fair Action 2/5
Wednesday, November 18, 2026

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 49.1°F
Average Humidity: 56%
Chance of Rain: 0%
Wind: 5 mph
UV Index: 3

Air Quality

EPA Index 2 • Moderate
PM2.5
10.6 μg/m³
Good
PM10
10.8 μg/m³
Good
Ozone (O3)
38.3 μg/m³
Photochemical
NO2
25.4 μg/m³
Nitrogen Dioxide
SO2
2.1 μg/m³
Sulfur Dioxide
CO
250.1 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 47m daylight
Sunrise 6:45 AM
Solar Noon 11:38 AM
Sunset 4:32 PM
Moon
First Quarter • 65%
Moonrise 1:11 PM
Transit 6:58 PM
Moonset 1:37 AM

Best Times for Fishing or Hunting

Major Periods

6:07 AM - 8:37 AM
6:28 PM - 8:58 PM

Minor Periods

1:07 AM - 2:37 AM
12:41 PM - 2:11 PM
Action Rating:
Fair Action 2/5
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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