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

Current Water Temperature

38.5°F

Measurement Time: Friday, December 26, 2025, 11:24 PM EST

Temperature Locations

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Local Points of Interest

Coast Guard Station Alexandria Bay; Keewaydin State Park

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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

9.7°F
Light snow
Conditions: Light snow
Humidity: 84%
Heat Index: 9.7°F
Feels Like: -4.7°F
Wind: NE 6.8 mph
Wind Gusts: 17 mph
Wind Chill: -4.7°F
Air Pressure: 1013.77 millibars
Dew Point: -4.7°F
Chance of Precipitation: 50%
Precipitation: 0.03 in
Cloud Cover: 0%
Visibility: 2 mi
UV Index: 0

Five Day Weather Forecast

Moderate or heavy snow showers
Fri
H: 19°F
L: 6°F
Moderate snow
Sat
H: 24°F
L: 9°F
Mist
Sun
H: 30°F
L: 9°F
Heavy rain
Mon
H: 43°F
L: 30°F
Blowing snow
Tue
H: 18°F
L: 16°F

Air Quality

AQI: 1 - Good
PM2.5: 7.55 μg/m3
PM10: 7.95 μg/m3
Carbon Monoxide: 197.85 μg/m3
Nitrogen Dioxide: 12.05 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 56 μg/m3

Astronomical

Sunrise: 7:38 AM
Sun Transit: 12:04 AM
Sunset: 4:31 PM
Daylight: 8 hrs 52 mins
Moonrise: 11:19 AM
Moon Transit: 12:00 AM
Moonset: 11:32 PM
Moon Phase: First Quarter
Moon Illumination: 40.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
6:23 AM - 8:53 AM

Minor Periods

12:00 AM - 12:00 AM
10:49 AM - 12:19 AM

Action Rating: 2 out of 5

special weather statement in effect

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Fri December 26, 2025, 1:36 PM
Expires: Sat December 27, 2025, 12:04 AM

Significant snow arriving this afternoon. What: Snowfall amounts 5 to 10 cm. When: This afternoon into tonight. Additional information: Snow is expected to begin this afternoon before ending from west to east through this evening. Snow may be heavy at times for some regions during the afternoon or early evening hours. Additionally gusty southeast winds up to 50 km/h may cause reduced visibility due to local blowing snow this afternoon. Travel may be difficult due to the accumulating snow. Motorists should exercise caution and adjust travel plans accordingly. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.


special weather statement in effect

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Fri December 26, 2025, 1:03 PM
Expires: Sat December 27, 2025, 3:01 AM

Significant snow expected today. What: Snowfall amounts of up to 10 cm. When: This afternoon into tonight. Additional information: Snow is expected to continue through the afternoon before ending from west to east through this evening. There is still some uncertainty regarding the track of the low pressure system, which may impact the eastern edge of the significant snowfall area. Snow may be heavy at times for some regions during the afternoon hours. Additionally gusty southeast winds up to 50 km/h may cause reduced visibility due to local blowing snow this afternoon. Travel may be difficult due to the accumulating snow. Motorists should exercise caution and adjust travel plans accordingly. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.


special weather statement in effect

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Fri December 26, 2025, 12:20 PM
Expires: Sat December 27, 2025, 3:03 AM

Significant snow expected today. What: Snowfall amounts of up to 10 cm. When: This afternoon into tonight. Additional information: Snow is expected to continue through the afternoon before ending from west to east through this evening. There is still some uncertainty regarding the track of the low pressure system, which may impact the eastern edge of the significant snowfall area. Snow may be heavy at times for some regions during the afternoon hours. Travel may be difficult due to the accumulating snow. Motorists should exercise caution and adjust travel plans accordingly. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.


special weather statement in effect

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Fri December 26, 2025, 8:42 PM
Expires: Sat December 27, 2025, 2:03 AM

Snow continues this evening. What: Snowfall amounts 5 to 10 cm. When: Ending late this evening or overnight. Additional information: Snow is expected to end from west to east this evening. Snow may be heavy at times. Travel may be difficult due to the accumulating snow. Motorists should exercise caution and adjust travel plans accordingly. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.


Friday, December 26, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 11.3°F
Average Humidity: 73%
Chance of Rain: 66%
Wind: 14.5 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 2.47 μg/m3
PM10: 2.67 μg/m3
Carbon Monoxide: 163.53 μg/m3
Nitrogen Dioxide: 3.9 μg/m3
Sulphur Dioxide: 1.61 μg/m3
Ozone: 71.56 μg/m3

Astronomical

Sunrise: 7:38 AM
Sun Transit: 12:04 AM
Sunset: 4:31 PM
Daylight: 8 hrs 52 mins
Moonrise: 11:19 AM
Moon Transit: 12:00 AM
Moonset: 11:32 PM
Moon Phase: First Quarter
Moon Illumination: 40.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
6:23 AM - 8:53 AM

Minor Periods

12:00 AM - 12:00 AM
10:49 AM - 12:19 AM

Action Rating: 2 out of 5

Saturday, December 27, 2025

Weather Forecast

Conditions: Moderate snow
Average Temperature: 15.6°F
Average Humidity: 83%
Chance of Rain: 61%
Wind: 15.2 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 8.61 μg/m3
PM10: 9.02 μg/m3
Carbon Monoxide: 218.49 μg/m3
Nitrogen Dioxide: 11.69 μg/m3
Sulphur Dioxide: 1.76 μg/m3
Ozone: 58.32 μg/m3

Astronomical

Sunrise: 7:39 AM
Sun Transit: 12:05 AM
Sunset: 4:31 PM
Daylight: 8 hrs 53 mins
Moonrise: 11:38 AM
Moon Transit: 4:23 AM
Moonset: 12:32 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%

Best Times for Fishing or Hunting

Major Periods

3:53 AM - 6:23 AM
3:53 AM - 6:23 AM

Minor Periods

11:08 AM - 12:38 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, December 28, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 20°F
Average Humidity: 86%
Chance of Rain: 65%
Wind: 10.3 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 12.2 μg/m3
PM10: 12.46 μg/m3
Carbon Monoxide: 240.05 μg/m3
Nitrogen Dioxide: 15.52 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 48.24 μg/m3

Astronomical

Sunrise: 7:39 AM
Sun Transit: 12:05 AM
Sunset: 4:32 PM
Daylight: 8 hrs 53 mins
Moonrise: 11:59 AM
Moon Transit: 6:52 PM
Moonset: 12:45 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%

Best Times for Fishing or Hunting

Major Periods

7:54 AM - 10:24 AM
6:22 PM - 8:52 PM

Minor Periods

11:29 AM - 12:59 AM
12:15 AM - 1:45 AM

Action Rating: 3 out of 5

Monday, December 29, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 37.1°F
Average Humidity: 97%
Chance of Rain: 89%
Wind: 30.9 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 7.23 μg/m3
PM10: 7.34 μg/m3
Carbon Monoxide: 219 μg/m3
Nitrogen Dioxide: 14.05 μg/m3
Sulphur Dioxide: 2.54 μg/m3
Ozone: 50.84 μg/m3

Astronomical

Sunrise: 7:39 AM
Sun Transit: 12:06 AM
Sunset: 4:33 PM
Daylight: 8 hrs 54 mins
Moonrise: 12:23 AM
Moon Transit: 7:44 PM
Moonset: 2:02 AM
Moon Phase: First Quarter
Moon Illumination: 73.5%

Best Times for Fishing or Hunting

Major Periods

8:44 AM - 11:14 AM
7:14 PM - 9:44 PM

Minor Periods

11:53 AM - 1:23 PM
1:32 AM - 3:02 AM

Action Rating: 2 out of 5

Tuesday, December 30, 2025

Weather Forecast

Conditions: Blowing snow
Average Temperature: 18.6°F
Average Humidity: 80%
Chance of Rain: 69%
Wind: 32.2 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 1.63 μg/m3
PM10: 1.7 μg/m3
Carbon Monoxide: 146.04 μg/m3
Nitrogen Dioxide: 2.27 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 80.08 μg/m3

Astronomical

Sunrise: 7:39 AM
Sun Transit: 12:06 AM
Sunset: 4:34 PM
Daylight: 8 hrs 55 mins
Moonrise: 12:52 AM
Moon Transit: 8:41 PM
Moonset: 3:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

9:39 AM - 12:09 AM
8:11 PM - 10:41 PM

Minor Periods

12:22 AM - 1:52 PM
2:52 AM - 4:22 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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