Water Temperature of the St. Lawrence River in Wellesley Island, NY
Current Water Temperature
Measurement Time: Wednesday, April 29, 2026, 3:48 PM EDT
Temperature Locations
View Nearby Locations View All New York Locations View Locations Near Me
Local Points of Interest
Coast Guard Station Alexandria Bay; Keewaydin State ParkStation 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

Five Day Weather Forecast

Wed
H: 55°F
L: 50°F

Thu
H: 50°F
L: 44°F

Fri
H: 47°F
L: 36°F

Sat
H: 46°F
L: 38°F

Sun
H: 47°F
L: 35°F
Air Quality
Nitrogen Dioxide: 8.05 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 59 μg/m3
Astronomical
Sun Transit: 1:01 PM
Sunset: 8:06 PM
Daylight: 14 hrs 8 mins
Moon Transit: 11:47 PM
Moonset: 4:45 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%
Best Times for Fishing or Hunting
Major Periods
12:52 AM - 3:22 PM12:00 AM - 12:00 AM
Minor Periods
5:52 PM - 7:22 PM4:15 AM - 5:45 AM
Action Rating: 3 out of 5
yellow warning - rainfall - in effect
Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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: Tue April 28, 2026, 10:26 PM
Expires: Wed April 29, 2026, 2:26 PM
Heavy rain is expected beginning late Wednesday. The ground, already near saturation, has little ability to absorb further rainfall. What: Rainfall amounts of 30 to 50 mm. When: Late Wednesday afternoon into Thursday morning. Additional information: A low pressure system will bring heavy, widespread rain beginning late Wednesday. ### Water will likely pool on roads and in low-lying areas. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit https://www.ontario.ca/page/floods for the latest details. 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.
Don't drive through flooded roadways. Watch for washouts near rivers, creeks and culverts.
yellow warning - rainfall - in effect
Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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: Wed April 29, 2026, 5:05 AM
Expires: Wed April 29, 2026, 9:05 PM
Heavy rain is expected. The ground, already near saturation, has little ability to absorb further rainfall. What: Rainfall amounts of 30 to 50 mm. When: Late this afternoon into Thursday morning. Additional information: A low pressure system will bring heavy, widespread rain beginning late this afternoon. ### Water will likely pool on roads and in low-lying areas. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit https://www.ontario.ca/page/floods for the latest details. 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.
Don't drive through flooded roadways. Watch for washouts near rivers, creeks and culverts.
yellow warning - rainfall - in effect
Service Notice – February 2026: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2026, changes are expected to include... 1) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard is tentatively set for Spring 2026 deployment. Data changes will appear in CAP following this deployment and 2) 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 – février 2026: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2026, il y aura des changements incluant... 1) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique devrait être déployée provisoirement au printemps 2026. Des changements de données apparaîtront dans le PAC à la suite de ce déploiement et 2) 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: Wed April 29, 2026, 11:03 AM
Expires: Thu April 30, 2026, 3:03 AM
Heavy rain is expected. The ground, already nearly saturated, will have a reduced ability to absorb more rain. What: From 30 to 50 millimetres of rain. When: Late this afternoon until Thursday morning. Additional information: A low pressure system will cause widespread heavy rain starting this afternoon. ### Water will likely pool on roads and in low-lying areas. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit https://www.ontario.ca/page/floods for the latest details. 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.
Don't drive through flooded roadways. Watch for washouts near rivers, creeks and culverts.
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.87 μg/m3
Sulphur Dioxide: 2.49 μg/m3
Ozone: 64.72 μg/m3
Astronomical
Sun Transit: 1:01 PM
Sunset: 8:06 PM
Daylight: 14 hrs 8 mins
Moon Transit: 11:47 PM
Moonset: 4:45 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%
Best Times for Fishing or Hunting
Major Periods
12:52 AM - 3:22 PM12:00 AM - 12:00 AM
Minor Periods
5:52 PM - 7:22 PM4:15 AM - 5:45 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.59 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 77.56 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:07 PM
Daylight: 14 hrs 11 mins
Moon Transit: 12:00 AM
Moonset: 5:04 AM
Moon Phase: Full
Moon Illumination: 99.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM1:35 PM - 4:05 PM
Minor Periods
6:59 PM - 8:29 PM4:34 AM - 6:04 AM
Action Rating: 5 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 2.94 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 70.64 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:08 PM
Daylight: 14 hrs 14 mins
Moon Transit: 12:31 AM
Moonset: 5:25 AM
Moon Phase: Full
Moon Illumination: 100.0%
Best Times for Fishing or Hunting
Major Periods
12:01 AM - 2:31 AM2:19 PM - 4:49 PM
Minor Periods
8:06 PM - 9:36 PM4:55 AM - 6:25 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.33 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 72.8 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:09 PM
Daylight: 14 hrs 16 mins
Moon Transit: 1:16 AM
Moonset: 5:50 AM
Moon Phase: Full
Moon Illumination: 98.4%
Best Times for Fishing or Hunting
Major Periods
12:46 AM - 3:16 AM3:06 PM - 5:36 PM
Minor Periods
9:12 PM - 10:42 PM5:20 AM - 6:50 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.25 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 67.38 μg/m3
Astronomical
Sun Transit: 1:00 PM
Sunset: 8:10 PM
Daylight: 14 hrs 19 mins
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 AM3:55 PM - 6:25 PM
Minor Periods
10:16 PM - 11:46 PM5:52 AM - 7:22 AM
Action Rating: 4 out of 5
