Water Temperature of the Peconic River in Riverhead, NY

Current Water Temperature

79.0°F

Measurement Time: Saturday, July 18, 2026, 2:54 PM 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

73°F
Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
77°F
78.5°F
96%
SW 22.4 mph
40.4 mph
74.8°F
69.7°F
0 in
100%
1 mi
1008 mbar
0

Five Day Weather Forecast

Smoky haze
Sat
H: 86°F
L: 68°F
Sunny
Sun
H: 77°F
L: 69°F
Sunny
Mon
H: 76°F
L: 66°F
Sunny
Tue
H: 76°F
L: 70°F
Patchy rain nearby
Wed
H: 80°F
L: 71°F

Air Quality

AQI: 1 - Good
PM2.5: 18.3 μg/m3
PM10: 23.3 μg/m3
Carbon Monoxide: 124 μg/m3
Nitrogen Dioxide: 3.8 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 120 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 12:56 AM
Sunset: 8:19 PM
Daylight: 14 hrs 45 mins
Moonrise: 10:28 AM
Moon Transit: 4:43 PM
Moonset: 10:48 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

6:14 AM - 8:44 AM
4:13 PM - 6:43 PM

Minor Periods

10:18 PM - 11:48 PM
9:58 AM - 11:28 AM

Action Rating: 2 out of 5

Small Craft Advisory issued July 18 at 2:32AM EDT until July 19 at 12:00AM EDT by NWS Upton NY

Effective: Sat July 18, 2026, 2:32 AM
Expires: Sat July 18, 2026, 5:00 PM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt. * WHERE...Long Island Sound east of Port Jefferson and New Haven, Peconic and Gardiners Bays, and South Shore Bays from Jones Inlet through Shinnecock Bay. * WHEN...From noon today to midnight EDT tonight. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Saturday, July 18, 2026

Weather Forecast

Smoky haze
86.2°F
67.5°F
74.8°F
82%
0.67 in
77%
0%
24.6 mph
4.1


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 41.6 μg/m3
PM10: 46.57 μg/m3
Carbon Monoxide: 142.08 μg/m3
Nitrogen Dioxide: 3.56 μg/m3
Sulphur Dioxide: 1.02 μg/m3
Ozone: 111.5 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 12:56 AM
Sunset: 8:19 PM
Daylight: 14 hrs 45 mins
Moonrise: 10:28 AM
Moon Transit: 4:43 PM
Moonset: 10:48 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

6:14 AM - 8:44 AM
4:13 PM - 6:43 PM

Minor Periods

10:18 PM - 11:48 PM
9:58 AM - 11:28 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
77.3°F
69.4°F
72.8°F
68%
0 in
5%
0%
22.8 mph
8.1


Air Quality

AQI: 1 - Good
PM2.5: 10.2 μg/m3
PM10: 11.5 μg/m3
Carbon Monoxide: 182.75 μg/m3
Nitrogen Dioxide: 4.29 μg/m3
Sulphur Dioxide: 1.01 μg/m3
Ozone: 97.25 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 12:56 AM
Sunset: 8:19 PM
Daylight: 14 hrs 44 mins
Moonrise: 11:35 AM
Moon Transit: 5:27 PM
Moonset: 11:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

6:58 AM - 9:28 AM
4:57 PM - 7:27 PM

Minor Periods

12:00 AM - 12:00 AM
11:05 AM - 12:35 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
75.7°F
66°F
70.5°F
57%
0 in
3%
0%
11.6 mph
8.3


Air Quality

AQI: 1 - Good
PM2.5: 7.34 μg/m3
PM10: 9.17 μg/m3
Carbon Monoxide: 156.96 μg/m3
Nitrogen Dioxide: 3.82 μg/m3
Sulphur Dioxide: 0.55 μg/m3
Ozone: 80 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
75.9°F
70.4°F
73.3°F
81%
0.24 in
74%
0%
19.5 mph
5.4


Air Quality

AQI: 1 - Good
PM2.5: 11.2 μg/m3
PM10: 16 μg/m3
Carbon Monoxide: 133.39 μg/m3
Nitrogen Dioxide: 2.25 μg/m3
Sulphur Dioxide: 0.62 μg/m3
Ozone: 93.88 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

Patchy rain nearby
79.7°F
71.2°F
75.8°F
78%
0.06 in
59%
0%
22.1 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 6.8 μg/m3
PM10: 9.81 μg/m3
Carbon Monoxide: 149 μg/m3
Nitrogen Dioxide: 2.39 μg/m3
Sulphur Dioxide: 0.36 μg/m3
Ozone: 77.78 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

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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