Water Temperature of the Peconic River in Riverhead, NY

Current Water Temperature

35.2°F

Measurement Time: Tuesday, February 17, 2026, 3:54 PM EST

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

34°F
Fog
Fog
26.8°F
34.6°F
96%
SW 8.7 mph
18.3 mph
31.4°F
33.3°F
0 in
60%
0 mi
1020 mbar
0

Five Day Weather Forecast

Overcast
Tue
H: 40°F
L: 28°F
Moderate rain
Wed
H: 41°F
L: 33°F
Overcast
Thu
H: 38°F
L: 32°F
Heavy rain
Fri
H: 38°F
L: 35°F
Overcast
Sat
H: 41°F
L: 34°F

Air Quality

AQI: 1 - Good
PM2.5: 35.05 μg/m3
PM10: 37.45 μg/m3
Carbon Monoxide: 337.85 μg/m3
Nitrogen Dioxide: 73.65 μg/m3
Sulphur Dioxide: 8.05 μg/m3
Ozone: 5 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 12:04 AM
Sunset: 5:27 PM
Daylight: 10 hrs 45 mins
Moonrise: 6:52 AM
Moon Transit: 12:15 AM
Moonset: 5:49 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:45 AM - 4:15 AM
11:45 AM - 2:15 PM

Minor Periods

5:19 PM - 6:49 PM
6:22 AM - 7:52 AM

Action Rating: 5 out of 5

Dense Fog Advisory issued February 17 at 12:53PM EST until February 18 at 10:00AM EST by NWS Upton NY

Effective: Tue February 17, 2026, 12:53 PM
Expires: Wed February 18, 2026, 4:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...From 10 PM this evening to 10 AM EST Wednesday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Tuesday, February 17, 2026

Weather Forecast

Overcast
39.7°F
28.4°F
34°F
88%
0 in
0%
3%
14.1 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 24.59 μg/m3
PM10: 28.85 μg/m3
Carbon Monoxide: 315.57 μg/m3
Nitrogen Dioxide: 46.53 μg/m3
Sulphur Dioxide: 4.89 μg/m3
Ozone: 40.96 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 12:04 AM
Sunset: 5:27 PM
Daylight: 10 hrs 45 mins
Moonrise: 6:52 AM
Moon Transit: 12:15 AM
Moonset: 5:49 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:45 AM - 4:15 AM
11:45 AM - 2:15 PM

Minor Periods

5:19 PM - 6:49 PM
6:22 AM - 7:52 AM

Action Rating: 5 out of 5

Wednesday, February 18, 2026

Weather Forecast

Moderate rain
41.4°F
33.1°F
36.2°F
97%
0.5 in
83%
0%
11.4 mph
0.1


Air Quality

AQI: 2 - Moderate
PM2.5: 31.63 μg/m3
PM10: 36.26 μg/m3
Carbon Monoxide: 327.25 μg/m3
Nitrogen Dioxide: 50.11 μg/m3
Sulphur Dioxide: 6.41 μg/m3
Ozone: 27 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 12:04 AM
Sunset: 5:29 PM
Daylight: 10 hrs 48 mins
Moonrise: 7:15 AM
Moon Transit: 12:00 AM
Moonset: 6:59 PM
Moon Phase: New
Moon Illumination: 1.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:31 AM - 5:01 AM

Minor Periods

6:29 PM - 7:59 PM
6:45 AM - 8:15 AM

Action Rating: 4 out of 5

Thursday, February 19, 2026

Weather Forecast

Overcast
37.6°F
32.2°F
34.3°F
86%
0 in
0%
0%
11.2 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 14.91 μg/m3
PM10: 17.77 μg/m3
Carbon Monoxide: 343.29 μg/m3
Nitrogen Dioxide: 34.09 μg/m3
Sulphur Dioxide: 2.83 μg/m3
Ozone: 38.88 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 12:04 AM
Sunset: 5:30 PM
Daylight: 10 hrs 50 mins
Moonrise: 7:37 AM
Moon Transit: 4:07 PM
Moonset: 8:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.2%

Best Times for Fishing or Hunting

Major Periods

3:17 AM - 5:47 AM
3:37 PM - 6:07 PM

Minor Periods

7:39 PM - 9:09 PM
7:07 AM - 8:37 AM

Action Rating: 3 out of 5

Friday, February 20, 2026

Weather Forecast

Heavy rain
37.6°F
34.7°F
36°F
93%
1.21 in
86%
0%
19.9 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 7.44 μg/m3
PM10: 10.39 μg/m3
Carbon Monoxide: 196.91 μg/m3
Nitrogen Dioxide: 8.93 μg/m3
Sulphur Dioxide: 1.73 μg/m3
Ozone: 73.12 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 12:04 AM
Sunset: 5:31 PM
Daylight: 10 hrs 53 mins
Moonrise: 7:59 AM
Moon Transit: 2:33 PM
Moonset: 9:21 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:03 PM - 4:33 PM

Minor Periods

8:51 PM - 10:21 PM
7:29 AM - 8:59 AM

Action Rating: 2 out of 5

Saturday, February 21, 2026

Weather Forecast

Overcast
41.2°F
34.3°F
37.6°F
84%
0 in
0%
0%
13.9 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.2 μg/m3
PM10: 4.53 μg/m3
Carbon Monoxide: 180.06 μg/m3
Nitrogen Dioxide: 3.6 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 87.31 μg/m3

Astronomical

Sunrise: 6:37 AM
Sun Transit: 12:04 AM
Sunset: 5:32 PM
Daylight: 10 hrs 55 mins
Moonrise: 8:24 AM
Moon Transit: 3:22 PM
Moonset: 10:35 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.4%

Best Times for Fishing or Hunting

Major Periods

4:51 AM - 7:21 AM
2:52 PM - 5:22 PM

Minor Periods

10:05 PM - 11:35 PM
7:54 AM - 9:24 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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