Water Temperature of the Peconic River in Riverhead, NY

Current Water Temperature

77.5°F

Measurement Time: Monday, July 20, 2026, 1:54 AM EDT

Temperature Locations

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Local Points of Interest

Colonels Island; Flanders, NY

Peconic River

Station Name: PECONIC RIVER AT COUNTY HWY 105 AT RIVERHEAD NY
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet

Nearest Address:
Cross River Dr
Riverhead, NY 11946
Suffolk County

GPS Coordinates: 40.91777778, -72.6386667

Nearby Water Temperatures

Orient Harbor, Orient, NY (23 mi)
Flax Pond, Old Field, NY (26.5 mi)
Great South Bay, West Sayville, NY (27.3 mi)
New Haven Harbor, New Haven, CT (28.9 mi)
Connecticut River, Old Lyme, CT (31.2 mi)
Housatonic River, Stratford, CT (31.3 mi)
Bridgeport Harbor, Bridgeport, CT (33.4 mi)
Rooster River, Bridgeport, CT (35.2 mi)
Fort Pond Bay, Montauk, NY (36.6 mi)
Mill River, Southport, CT (36.7 mi)
Mill River, Fairfield, CT (36.8 mi)
Quinnipiac River, Wallingford, CT (38.3 mi)
East Branch Eightmile River, Lyme, CT (38.6 mi)
Eightmile River, East Haddam, CT (39.5 mi)
Saugatuck River, Westport, CT (40.1 mi)

Weather for Riverhead, New York

Current Weather

61°F
Sunny
Sunny
61°F
63.3°F
78%
NNE 5.4 mph
8.1 mph
63.3°F
55.6°F
0 in
0%
9 mi
1015 mbar
0.4

Five Day Weather Forecast

Sunny
Mon
H: 83°F
L: 60°F
Sunny
Tue
H: 76°F
L: 69°F
Sunny
Wed
H: 80°F
L: 71°F
Sunny
Thu
H: 76°F
L: 64°F
Sunny
Fri
H: 76°F
L: 66°F

Air Quality

AQI: 1 - Good
PM2.5: 4.4 μg/m3
PM10: 5.1 μg/m3
Carbon Monoxide: 113 μg/m3
Nitrogen Dioxide: 5.3 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 50 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 12:57 AM
Sunset: 8:18 PM
Daylight: 14 hrs 42 mins
Moonrise: 12:41 AM
Moon Transit: 6:10 PM
Moonset: 12:09 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:42 AM - 10:12 AM
5:40 PM - 8:10 PM

Minor Periods

12:11 AM - 1:41 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Small Craft Advisory issued July 20 at 2:27AM EDT until July 22 at 6:00AM EDT by NWS Upton NY

Effective: Mon July 20, 2026, 2:27 AM
Expires: Mon July 20, 2026, 6:00 PM

* WHAT...South winds 10 to 20 kt with gusts up to 30 kt and seas 5 to 8 feet expected. * WHERE...Sandy Hook NJ to Montauk Point NY out 20 nm. * WHEN...From 8 AM Tuesday to 6 AM EDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Monday, July 20, 2026

Weather Forecast

Sunny
83.1°F
60.3°F
70.9°F
62%
0 in
4%
0%
13 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 6 μg/m3
PM10: 7.26 μg/m3
Carbon Monoxide: 111.38 μg/m3
Nitrogen Dioxide: 4.3 μg/m3
Sulphur Dioxide: 0.64 μg/m3
Ozone: 78.67 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 12:57 AM
Sunset: 8:18 PM
Daylight: 14 hrs 42 mins
Moonrise: 12:41 AM
Moon Transit: 6:10 PM
Moonset: 12:09 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:42 AM - 10:12 AM
5:40 PM - 8:10 PM

Minor Periods

12:11 AM - 1:41 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, July 21, 2026

Weather Forecast

Sunny
76.1°F
69.1°F
72.9°F
84%
0.63 in
80%
0%
19.5 mph
5.3


Air Quality

AQI: 1 - Good
PM2.5: 11.51 μg/m3
PM10: 16.24 μg/m3
Carbon Monoxide: 130.54 μg/m3
Nitrogen Dioxide: 1.83 μg/m3
Sulphur Dioxide: 0.48 μg/m3
Ozone: 93.54 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 12:57 AM
Sunset: 8:17 PM
Daylight: 14 hrs 41 mins
Moonrise: 1:46 PM
Moon Transit: 6:54 PM
Moonset: 12:31 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

8:25 AM - 10:55 AM
6:24 PM - 8:54 PM

Minor Periods

1:16 PM - 2:46 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
79.5°F
71.4°F
75.2°F
80%
0.21 in
73%
0%
17.2 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 7.82 μg/m3
PM10: 10.64 μg/m3
Carbon Monoxide: 134.79 μg/m3
Nitrogen Dioxide: 3.11 μg/m3
Sulphur Dioxide: 0.55 μg/m3
Ozone: 87.67 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 12:57 AM
Sunset: 8:16 PM
Daylight: 14 hrs 39 mins
Moonrise: 2:51 PM
Moon Transit: 7:40 PM
Moonset: 12:56 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

9:10 AM - 11:40 AM
7:10 PM - 9:40 PM

Minor Periods

2:21 PM - 3:51 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
76.1°F
64.1°F
69.2°F
62%
0 in
4%
0%
17 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 5.28 μg/m3
PM10: 6.03 μg/m3
Carbon Monoxide: 143.35 μg/m3
Nitrogen Dioxide: 5.83 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 80.46 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 12:57 AM
Sunset: 8:15 PM
Daylight: 14 hrs 37 mins
Moonrise: 3:54 PM
Moon Transit: 8:28 PM
Moonset: 12:25 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

9:57 AM - 12:27 AM
7:58 PM - 10:28 PM

Minor Periods

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

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
76°F
65.5°F
70.5°F
58%
0 in
3%
0%
10.3 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 14.43 μg/m3
PM10: 15.5 μg/m3
Carbon Monoxide: 271.33 μg/m3
Nitrogen Dioxide: 18.74 μg/m3
Sulphur Dioxide: 1.24 μg/m3
Ozone: 57 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 12:57 AM
Sunset: 8:15 PM
Daylight: 14 hrs 35 mins
Moonrise: 4:55 PM
Moon Transit: 9:18 PM
Moonset: 12:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

10:46 AM - 1:16 PM
8:48 PM - 11:18 PM

Minor Periods

4:25 PM - 5:55 PM
12:28 AM - 1:58 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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