Water Temperature of the St. Lawrence River in Wellesley Island, NY

Current Water Temperature

35.8°F

Measurement Time: Wednesday, February 25, 2026, 3:54 AM EST

Temperature Locations

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Local Points of Interest

Coast Guard Station Alexandria Bay; Keewaydin State Park

St. Lawrence River

Station Name: Alexandria Bay
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 240 feet

Sensor Depth: -2 feet

Nearest Address:
45898 Hopewell Hall Rd
Wellesley Island, NY 13640
Jefferson County

GPS Coordinates: 44.331110, -75.934528

Nearby Water Temperatures

St. Lawrence River, Ogdensburg, NY (33.6 mi)
Independence River, Donnattsburg, NY (50.2 mi)
Oswego River, Oswego, NY (67.1 mi)
Buck Creek, Inlet, NY (72.6 mi)
Lake Ontario, Rochester, NY (87.9 mi)
Skaneateles Lake, Skaneateles, NY (98.9 mi)
Irondequoit Creek, Penfield, NY (113.6 mi)
Allen Creek, Brighton, NY (115 mi)
Northrup Creek, North Greece, NY (116.9 mi)
Genesee River, Rochester, NY (117.5 mi)
Erie Canal, Rochester, NY (119.5 mi)
Sandy Creek, North Hamlin, NY (120.2 mi)
Mohawk River, Fonda, NY (123.3 mi)
Lake Champlain, Port Henry, NY (124.4 mi)
Schoharie Creek, Fort Hunter, NY (126.9 mi)

Weather for Wellesley Island, New York

Current Weather

19.6°F
Clear
Clear
6.2°F
16.4°F
65%
S 13.9 mph
21 mph
3.4°F
6.5°F
0 in
0%
1 mi
1001 mbar
0

Five Day Weather Forecast

Light snow
Wed
H: 36°F
L: 9°F
Partly Cloudy
Thu
H: 26°F
L: 3°F
Overcast
Fri
H: 38°F
L: 14°F
Moderate or heavy snow showers
Sat
H: 37°F
L: 18°F
Light freezing rain
Sun
H: 18°F
L: -2°F

Air Quality

AQI: 1 - Good
PM2.5: 8.85 μg/m3
PM10: 9.45 μg/m3
Carbon Monoxide: 197.85 μg/m3
Nitrogen Dioxide: 6.15 μg/m3
Sulphur Dioxide: 3.35 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:16 AM
Sunset: 5:46 PM
Daylight: 10 hrs 59 mins
Moonrise: 11:00 AM
Moon Transit: 7:27 PM
Moonset: 2:50 AM
Moon Phase: First Quarter
Moon Illumination: 62.3%

Best Times for Fishing or Hunting

Major Periods

8:23 AM - 10:53 AM
6:57 PM - 9:27 PM

Minor Periods

10:30 AM - 12:00 AM
2:20 AM - 3:50 AM

Action Rating: 2 out of 5

Winter Weather Advisory issued February 24 at 1:10PM EST until February 26 at 7:00AM EST by NWS Buffalo NY

Effective: Tue February 24, 2026, 1:10 PM
Expires: Wed February 25, 2026, 2:00 AM

* WHAT...Snow expected late tonight through Wednesday, followed by more localized lake effect snow Wednesday night through early Thursday. Total snow accumulations of 5 to 9 inches in the most persistent snows across Oswego County and the Tug Hill Plateau, falling in several different batches with a break between. * WHERE...Oswego and Lewis Counties. The greatest accumulations will be across portions of Oswego County and the Tug Hill Plateau. * WHEN...From 1 AM Wednesday to 7 AM EST Thursday. * IMPACTS...Travel will be difficult at times with snow covered roads and poor visibility. The hazardous conditions will impact the Wednesday morning and evening commutes.

Periods of snow will result in snow covered roads and limited visibilities. Slow down and use caution while driving. Submit snow reports through our website or social media.


Winter Weather Advisory issued February 25 at 12:42AM EST until February 26 at 7:00AM EST by NWS Buffalo NY

Effective: Wed February 25, 2026, 12:42 AM
Expires: Wed February 25, 2026, 1:00 PM

* WHAT...Snow expected through today, followed by more localized lake effect snow tonight through early Thursday. Total snow accumulations of 5 to 9 inches in the most persistent snows across Oswego County and the Tug Hill Plateau, falling in several different batches with a break between. * WHERE...Oswego and Lewis Counties. The greatest accumulations will be across portions of Oswego County and the Tug Hill Plateau. * WHEN...Until 7 AM EST Thursday. * IMPACTS...Travel will be difficult at times with snow covered roads and poor visibility. The hazardous conditions will impact the Wednesday morning and evening commutes.

Periods of snow will result in snow covered roads and limited visibilities. Slow down and use caution while driving. Submit snow reports through our website or social media.
Wednesday, February 25, 2026

Weather Forecast

Light snow
35.6°F
9.3°F
25.6°F
83%
0.18 in
86%
42%
17.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 6.02 μg/m3
PM10: 6.33 μg/m3
Carbon Monoxide: 193.25 μg/m3
Nitrogen Dioxide: 5.77 μg/m3
Sulphur Dioxide: 2.55 μg/m3
Ozone: 79.24 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 12:16 AM
Sunset: 5:46 PM
Daylight: 10 hrs 59 mins
Moonrise: 11:00 AM
Moon Transit: 7:27 PM
Moonset: 2:50 AM
Moon Phase: First Quarter
Moon Illumination: 62.3%

Best Times for Fishing or Hunting

Major Periods

8:23 AM - 10:53 AM
6:57 PM - 9:27 PM

Minor Periods

10:30 AM - 12:00 AM
2:20 AM - 3:50 AM

Action Rating: 2 out of 5

Thursday, February 26, 2026

Weather Forecast

Partly Cloudy
26.4°F
3.2°F
21.9°F
73%
0 in
0%
0%
15 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 2.53 μg/m3
PM10: 2.6 μg/m3
Carbon Monoxide: 184.69 μg/m3
Nitrogen Dioxide: 3.44 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 81.36 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 12:16 AM
Sunset: 5:48 PM
Daylight: 11 hrs 2 mins
Moonrise: 12:05 AM
Moon Transit: 8:29 PM
Moonset: 3:54 AM
Moon Phase: First Quarter
Moon Illumination: 72.9%

Best Times for Fishing or Hunting

Major Periods

9:26 AM - 11:56 AM
7:59 PM - 10:29 PM

Minor Periods

11:35 AM - 1:05 PM
3:24 AM - 4:54 AM

Action Rating: 2 out of 5

Friday, February 27, 2026

Weather Forecast

Overcast
37.9°F
14.2°F
27.8°F
86%
0 in
0%
0%
15.2 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 7.94 μg/m3
PM10: 8.33 μg/m3
Carbon Monoxide: 214.45 μg/m3
Nitrogen Dioxide: 6.85 μg/m3
Sulphur Dioxide: 2.28 μg/m3
Ozone: 83.24 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:16 AM
Sunset: 5:49 PM
Daylight: 11 hrs 5 mins
Moonrise: 1:20 PM
Moon Transit: 9:29 PM
Moonset: 4:46 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.3%

Best Times for Fishing or Hunting

Major Periods

10:27 AM - 12:57 AM
8:59 PM - 11:29 PM

Minor Periods

12:50 AM - 2:20 PM
4:16 AM - 5:46 AM

Action Rating: 2 out of 5

Saturday, February 28, 2026

Weather Forecast

Moderate or heavy snow showers
36.5°F
17.7°F
32°F
89%
0.06 in
82%
0%
23.7 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 8.23 μg/m3
PM10: 8.74 μg/m3
Carbon Monoxide: 199.82 μg/m3
Nitrogen Dioxide: 4.64 μg/m3
Sulphur Dioxide: 3.26 μg/m3
Ozone: 91.12 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 12:16 AM
Sunset: 5:51 PM
Daylight: 11 hrs 8 mins
Moonrise: 2:39 PM
Moon Transit: 10:24 PM
Moonset: 5:25 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

11:24 AM - 1:54 PM
12:00 AM - 12:00 AM

Minor Periods

2:09 PM - 3:39 PM
4:55 AM - 6:25 AM

Action Rating: 3 out of 5

Sunday, March 1, 2026

Weather Forecast

Light freezing rain
17.8°F
-2.1°F
12.1°F
87%
0.08 in
83%
36%
14.5 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.88 μg/m3
PM10: 1.95 μg/m3
Carbon Monoxide: 185.75 μg/m3
Nitrogen Dioxide: 2.72 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 80.31 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 12:16 AM
Sunset: 5:52 PM
Daylight: 11 hrs 11 mins
Moonrise: 3:57 PM
Moon Transit: 11:15 PM
Moonset: 5:55 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

12:17 AM - 2:47 PM
12:00 AM - 12:00 AM

Minor Periods

3:27 PM - 4:57 PM
5:25 AM - 6:55 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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