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

Current Water Temperature

45.7°F

Measurement Time: Sunday, May 3, 2026, 5:18 PM EDT

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

53.1°F
Sunny
Sunny
48.4°F
56.4°F
42%
SW 15.9 mph
21.1 mph
53.3°F
31.9°F
0 in
0%
6 mi
1009 mbar
1.6

Five Day Weather Forecast

Sunny
Sun
H: 58°F
L: 34°F
Patchy rain nearby
Mon
H: 57°F
L: 45°F
Moderate rain
Tue
H: 55°F
L: 43°F
Patchy rain nearby
Wed
H: 52°F
L: 42°F
Patchy rain nearby
Thu
H: 51°F
L: 41°F

Air Quality

AQI: 1 - Good
PM2.5: 10.95 μg/m3
PM10: 12.95 μg/m3
Carbon Monoxide: 152.85 μg/m3
Nitrogen Dioxide: 6.05 μg/m3
Sulphur Dioxide: 2.35 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:00 PM
Sunset: 8:10 PM
Daylight: 14 hrs 19 mins
Moonrise: 10:46 PM
Moon Transit: 2:04 AM
Moonset: 6:22 AM
Moon Phase: Full
Moon Illumination: 94.4%

Best Times for Fishing or Hunting

Major Periods

1:34 AM - 4:04 AM
3:55 PM - 6:25 PM

Minor Periods

10:16 PM - 11:46 PM
5:52 AM - 7:22 AM

Action Rating: 4 out of 5

Sunday, May 3, 2026

Weather Forecast

Sunny
57.7°F
33.8°F
45.3°F
61%
0 in
0%
0%
17 mph
5.8


Air Quality

AQI: 1 - Good
PM2.5: 7.7 μg/m3
PM10: 9.67 μg/m3
Carbon Monoxide: 155.85 μg/m3
Nitrogen Dioxide: 4.21 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 72.68 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:00 PM
Sunset: 8:10 PM
Daylight: 14 hrs 19 mins
Moonrise: 10:46 PM
Moon Transit: 2:04 AM
Moonset: 6:22 AM
Moon Phase: Full
Moon Illumination: 94.4%

Best Times for Fishing or Hunting

Major Periods

1:34 AM - 4:04 AM
3:55 PM - 6:25 PM

Minor Periods

10:16 PM - 11:46 PM
5:52 AM - 7:22 AM

Action Rating: 4 out of 5

Monday, May 4, 2026

Weather Forecast

Patchy rain nearby
57.3°F
45°F
50.3°F
82%
0.04 in
89%
0%
19.5 mph
5.6


Air Quality

AQI: 1 - Good
PM2.5: 12.79 μg/m3
PM10: 13.79 μg/m3
Carbon Monoxide: 155.73 μg/m3
Nitrogen Dioxide: 4.04 μg/m3
Sulphur Dioxide: 2.54 μg/m3
Ozone: 93.88 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:00 PM
Sunset: 8:12 PM
Daylight: 14 hrs 22 mins
Moonrise: 11:44 PM
Moon Transit: 2:54 AM
Moonset: 7:00 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%

Best Times for Fishing or Hunting

Major Periods

2:24 AM - 4:54 AM
4:46 PM - 7:16 PM

Minor Periods

12:00 AM - 12:00 AM
6:30 AM - 8:00 AM

Action Rating: 2 out of 5

Tuesday, May 5, 2026

Weather Forecast

Moderate rain
54.5°F
42.5°F
50.3°F
91%
0.35 in
88%
0%
17.9 mph
2.1


Air Quality

AQI: 1 - Good
PM2.5: 9.53 μg/m3
PM10: 9.99 μg/m3
Carbon Monoxide: 158.73 μg/m3
Nitrogen Dioxide: 3.9 μg/m3
Sulphur Dioxide: 3.49 μg/m3
Ozone: 93.4 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:00 PM
Sunset: 8:13 PM
Daylight: 14 hrs 24 mins
Moonrise: 12:44 AM
Moon Transit: 3:45 AM
Moonset: 7:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.8%

Best Times for Fishing or Hunting

Major Periods

3:15 AM - 5:45 AM
5:37 PM - 8:07 PM

Minor Periods

7:17 AM - 8:47 AM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Wednesday, May 6, 2026

Weather Forecast

Patchy rain nearby
52.3°F
41.9°F
45.3°F
84%
0.15 in
84%
0%
15 mph
6.1


Air Quality

AQI: 1 - Good
PM2.5: 5.29 μg/m3
PM10: 5.57 μg/m3
Carbon Monoxide: 144.34 μg/m3
Nitrogen Dioxide: 4.25 μg/m3
Sulphur Dioxide: 1.49 μg/m3
Ozone: 76.72 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:00 PM
Sunset: 8:14 PM
Daylight: 14 hrs 27 mins
Moonrise: 12:34 AM
Moon Transit: 4:37 AM
Moonset: 8:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.0%

Best Times for Fishing or Hunting

Major Periods

4:07 AM - 6:37 AM
6:28 PM - 8:58 PM

Minor Periods

8:13 AM - 9:43 AM
12:04 AM - 1:34 AM

Action Rating: 2 out of 5

Thursday, May 7, 2026

Weather Forecast

Patchy rain nearby
51°F
40.7°F
45.6°F
71%
0.03 in
82%
0%
19.9 mph
5.2


Air Quality

AQI: 1 - Good
PM2.5: 5.56 μg/m3
PM10: 5.61 μg/m3
Carbon Monoxide: 184.08 μg/m3
Nitrogen Dioxide: 9.53 μg/m3
Sulphur Dioxide: 2.22 μg/m3
Ozone: 54 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:00 PM
Sunset: 8:15 PM
Daylight: 14 hrs 29 mins
Moonrise: 1:14 AM
Moon Transit: 5:27 AM
Moonset: 9:45 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%

Best Times for Fishing or Hunting

Major Periods

4:57 AM - 7:27 AM
7:18 PM - 9:48 PM

Minor Periods

9:15 AM - 10:45 AM
12:44 AM - 2:14 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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