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

Current Water Temperature

39.9°F

Measurement Time: Sunday, March 22, 2026, 12:24 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

33.4°F
Light drizzle
Light drizzle
27.6°F
36.5°F
94%
NNW 6.5 mph
9.7 mph
31.3°F
36.6°F
0.02 in
0%
1 mi
1004 mbar
0.5

Five Day Weather Forecast

Moderate rain
Sun
H: 38°F
L: 32°F
Overcast
Mon
H: 34°F
L: 27°F
Partly Cloudy
Tue
H: 33°F
L: 24°F
Light freezing rain
Wed
H: 40°F
L: 30°F
Moderate rain
Thu
H: 49°F
L: 36°F

Air Quality

AQI: 1 - Good
PM2.5: 7.65 μg/m3
PM10: 8.05 μg/m3
Carbon Monoxide: 237.85 μg/m3
Nitrogen Dioxide: 9.45 μg/m3
Sulphur Dioxide: 2.55 μg/m3
Ozone: 89 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:00 AM
Sunset: 7:19 PM
Daylight: 12 hrs 16 mins
Moonrise: 8:29 AM
Moon Transit: 4:18 PM
Moonset: 12:01 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

5:16 AM - 7:46 AM
3:48 PM - 6:18 PM

Minor Periods

7:59 AM - 9:29 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

special weather statement 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: Sat March 21, 2026, 5:43 PM
Expires: Sun March 22, 2026, 9:43 AM

Snow, possibly becoming mixed with freezing rain tonight. What: Total snowfall amounts of 5 to 12 cm. Reduced visibility in heavy snow. Risk of freezing rain. When: Tonight through Sunday morning. Additional information: An Alberta Clipper is spreading snow across the region. Snow will reach eastern Ontario later this evening. The snow may become mixed with freezing rain or freezing drizzle tonight before coming to an end Sunday morning. Roads and walkways may be difficult to navigate due to accumulating snow. Untreated roads may become icy and slippery. Motorists should allow extra time to get to their destination. ### 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.


special weather statement 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: Sat March 21, 2026, 9:20 PM
Expires: Sun March 22, 2026, 1:02 PM

Snow, possibly becoming mixed with freezing rain tonight. What: Total snowfall amounts of 5 to 12 cm. Reduced visibility in heavy snow. Risk of freezing rain. When: Tonight through Sunday morning. Additional information: An Alberta Clipper is spreading snow across the region. The snow may become mixed with freezing rain or freezing drizzle tonight before coming to an end Sunday morning. Roads and walkways may be difficult to navigate due to accumulating snow. Untreated roads may become icy and slippery. Motorists should allow extra time to get to their destination. ### 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.


special weather statement ended

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: Sun March 22, 2026, 7:47 AM
Expires: Sun March 22, 2026, 8:47 AM

###


special weather statement 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: Sun March 22, 2026, 4:44 AM
Expires: Sun March 22, 2026, 1:03 PM

Snow, possibly becoming mixed with freezing rain or freezing drizzle. What: Total snowfall amounts of 5 to 10 cm. Reduced visibility in heavy snow. Risk of freezing rain. When: Early this morning. Additional information: Snow may become mixed with freezing rain or freezing drizzle before coming to an end this morning. Roads and walkways may be difficult to navigate due to accumulating snow. Untreated roads may become icy and slippery. Motorists should allow extra time to get to their destination. ### 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.


yellow advisory - freezing drizzle - 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: Sun March 22, 2026, 7:40 AM
Expires: Sun March 22, 2026, 1:01 PM

Areas of freezing drizzle continue. What: Freezing drizzle with light ice build-up making surfaces icy and slippery. When: This morning. ### Icy surfaces will likely form and could be difficult to detect. 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.

Be very careful if walking or driving.


Sunday, March 22, 2026

Weather Forecast

Moderate rain
37.9°F
31.6°F
34.2°F
93%
0.24 in
88%
14%
13 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 8.27 μg/m3
PM10: 8.87 μg/m3
Carbon Monoxide: 219.09 μg/m3
Nitrogen Dioxide: 8.61 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 86.52 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:00 AM
Sunset: 7:19 PM
Daylight: 12 hrs 16 mins
Moonrise: 8:29 AM
Moon Transit: 4:18 PM
Moonset: 12:01 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

5:16 AM - 7:46 AM
3:48 PM - 6:18 PM

Minor Periods

7:59 AM - 9:29 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, March 23, 2026

Weather Forecast

Overcast
33.6°F
27.3°F
29.7°F
78%
0 in
0%
0%
13.2 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 4.25 μg/m3
PM10: 5.03 μg/m3
Carbon Monoxide: 191.57 μg/m3
Nitrogen Dioxide: 4.14 μg/m3
Sulphur Dioxide: 2.03 μg/m3
Ozone: 97.88 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 1:10 PM
Sunset: 7:20 PM
Daylight: 12 hrs 19 mins
Moonrise: 9:06 AM
Moon Transit: 5:18 PM
Moonset: 12:23 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.8%

Best Times for Fishing or Hunting

Major Periods

6:15 AM - 8:45 AM
4:48 PM - 7:18 PM

Minor Periods

8:36 AM - 10:06 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, March 24, 2026

Weather Forecast

Partly Cloudy
32.5°F
23.5°F
28.5°F
73%
0 in
0%
0%
15.7 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 3.87 μg/m3
PM10: 4.83 μg/m3
Carbon Monoxide: 181.89 μg/m3
Nitrogen Dioxide: 4.44 μg/m3
Sulphur Dioxide: 1.71 μg/m3
Ozone: 90.08 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 1:09 PM
Sunset: 7:21 PM
Daylight: 12 hrs 22 mins
Moonrise: 9:56 AM
Moon Transit: 6:21 PM
Moonset: 1:41 AM
Moon Phase: Waxing Crescent
Moon Illumination: 34.0%

Best Times for Fishing or Hunting

Major Periods

7:17 AM - 9:47 AM
5:51 PM - 8:21 PM

Minor Periods

9:26 AM - 10:56 AM
1:11 AM - 2:41 AM

Action Rating: 3 out of 5

Wednesday, March 25, 2026

Weather Forecast

Light freezing rain
39.6°F
30°F
33.6°F
86%
0.01 in
88%
0%
9.8 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.75 μg/m3
PM10: 4.26 μg/m3
Carbon Monoxide: 190.93 μg/m3
Nitrogen Dioxide: 4.73 μg/m3
Sulphur Dioxide: 1.67 μg/m3
Ozone: 86.84 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 1:09 PM
Sunset: 7:22 PM
Daylight: 12 hrs 25 mins
Moonrise: 10:58 AM
Moon Transit: 7:23 PM
Moonset: 2:49 AM
Moon Phase: First Quarter
Moon Illumination: 45.1%

Best Times for Fishing or Hunting

Major Periods

8:20 AM - 10:50 AM
6:53 PM - 9:23 PM

Minor Periods

10:28 AM - 11:58 AM
2:19 AM - 3:49 AM

Action Rating: 3 out of 5

Thursday, March 26, 2026

Weather Forecast

Moderate rain
49.1°F
35.9°F
41.7°F
97%
0.43 in
84%
0%
23 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.76 μg/m3
PM10: 4.39 μg/m3
Carbon Monoxide: 186.87 μg/m3
Nitrogen Dioxide: 4.33 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 91.38 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 1:09 PM
Sunset: 7:24 PM
Daylight: 12 hrs 28 mins
Moonrise: 12:10 AM
Moon Transit: 8:23 PM
Moonset: 3:44 AM
Moon Phase: First Quarter
Moon Illumination: 56.4%

Best Times for Fishing or Hunting

Major Periods

9:21 AM - 11:51 AM
7:53 PM - 10:23 PM

Minor Periods

11:40 AM - 1:10 PM
3:14 AM - 4:44 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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