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

Current Water Temperature

68.2°F

Measurement Time: Monday, July 20, 2026, 5:54 AM 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

55.9°F
Sunny
Sunny
55.7°F
55.8°F
87%
SSW 4 mph
8.5 mph
54.9°F
51.7°F
0 in
0%
9 mi
1014 mbar
0

Five Day Weather Forecast

Sunny
Mon
H: 82°F
L: 56°F
Partly Cloudy
Tue
H: 78°F
L: 66°F
Patchy rain nearby
Wed
H: 66°F
L: 56°F
Sunny
Thu
H: 73°F
L: 56°F
Sunny
Fri
H: 74°F
L: 59°F

Air Quality

AQI: 1 - Good
PM2.5: 3.6 μg/m3
PM10: 3.7 μg/m3
Carbon Monoxide: 108 μg/m3
Nitrogen Dioxide: 3.3 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 48 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:10 PM
Sunset: 8:42 PM
Daylight: 15 hrs 3 mins
Moonrise: 1:00 PM
Moon Transit: 6:24 PM
Moonset: 12:18 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
5:54 PM - 8:24 PM

Minor Periods

12:30 AM - 2:00 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
81.7°F
55.8°F
67.9°F
67%
0 in
5%
0%
12.3 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 3.79 μg/m3
PM10: 3.98 μg/m3
Carbon Monoxide: 109.04 μg/m3
Nitrogen Dioxide: 2.89 μg/m3
Sulphur Dioxide: 0.54 μg/m3
Ozone: 75.5 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:10 PM
Sunset: 8:42 PM
Daylight: 15 hrs 3 mins
Moonrise: 1:00 PM
Moon Transit: 6:24 PM
Moonset: 12:18 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
5:54 PM - 8:24 PM

Minor Periods

12:30 AM - 2:00 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, July 21, 2026

Weather Forecast

Partly Cloudy
77.9°F
66.4°F
70.9°F
74%
0.48 in
78%
0%
21.3 mph
3.1


Air Quality

AQI: 1 - Good
PM2.5: 7.3 μg/m3
PM10: 7.45 μg/m3
Carbon Monoxide: 169.88 μg/m3
Nitrogen Dioxide: 2.73 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 90.25 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:10 PM
Sunset: 8:41 PM
Daylight: 15 hrs 1 mins
Moonrise: 2:08 PM
Moon Transit: 7:08 PM
Moonset: 12:38 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

8:12 AM - 10:42 AM
6:38 PM - 9:08 PM

Minor Periods

1:38 PM - 3:08 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, July 22, 2026

Weather Forecast

Patchy rain nearby
65.9°F
55.8°F
62.7°F
87%
0.11 in
80%
0%
15.7 mph
4.5


Air Quality

AQI: 1 - Good
PM2.5: 2.15 μg/m3
PM10: 2.17 μg/m3
Carbon Monoxide: 186.42 μg/m3
Nitrogen Dioxide: 2.56 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 76.92 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 1:10 PM
Sunset: 8:40 PM
Daylight: 14 hrs 59 mins
Moonrise: 3:15 PM
Moon Transit: 7:54 PM
Moonset: 12:00 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

8:57 AM - 11:27 AM
7:24 PM - 9:54 PM

Minor Periods

2:45 PM - 4:15 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
72.9°F
55.6°F
64.3°F
61%
0 in
7%
0%
15 mph
7.3


Air Quality

AQI: 1 - Good
PM2.5: 4.17 μg/m3
PM10: 4.5 μg/m3
Carbon Monoxide: 112.69 μg/m3
Nitrogen Dioxide: 1.97 μg/m3
Sulphur Dioxide: 0.24 μg/m3
Ozone: 71.83 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 1:10 PM
Sunset: 8:39 PM
Daylight: 14 hrs 57 mins
Moonrise: 4:21 PM
Moon Transit: 8:42 PM
Moonset: 12:26 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

9:44 AM - 12:14 AM
8:12 PM - 10:42 PM

Minor Periods

3:51 PM - 5:21 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
74.3°F
58.7°F
65.6°F
70%
0.18 in
63%
0%
13.4 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 6.14 μg/m3
PM10: 6.41 μg/m3
Carbon Monoxide: 165 μg/m3
Nitrogen Dioxide: 7.01 μg/m3
Sulphur Dioxide: 0.54 μg/m3
Ozone: 60.11 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 1:10 PM
Sunset: 8:38 PM
Daylight: 14 hrs 55 mins
Moonrise: 5:24 PM
Moon Transit: 9:31 PM
Moonset: 12:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

10:33 AM - 1:03 PM
9:01 PM - 11:31 PM

Minor Periods

4:54 PM - 6:24 PM
12:28 AM - 1:58 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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