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Current Lake Ontario Conditions What's New | Great Lakes Observations Explorer | Weather | Water Levels | Water Temperatures Beaches | Boating Safety/Security Advisories | Fishing Conditions Lock & Port Updates | Ice Conditions 
What's New
Developed by the Great Lakes Observing System (GLOS), a regional node of the U.S. Integrated Ocean Observing System (IOOS) initiative.
Weather Recent Marine Data National Data Buoy Center, National Weather Service (NOAA) Real-time data from all US Moored Buoy Stations, Canadian Moored Buoy Stations and C-MAN Stations in Eastern / Western Great Lakes. Dial-a-Buoy phone service is also available. Lake Ontario Marine Weather Forecasts National Weather Service Lake Ontario Open Water Text Forecast National Weather Service
Real-Time Water Levels
Lake Superior | St. Marys River | Lake Michigan | Lake Huron | St. Clair River Lake St. Clair | Detroit River | Lake Erie | Niagara River | Lake Ontario | St. Lawrence
Water Temperatures Lake Ontario Surface Water Temperatures Michigan Sea Grant Contour maps of surface water temps. This site uses satellite imagery from the Great Lakes CoastWatch Node to "build" a composite map of surface temps. Lake Ontario Temperature Profiles NOAA Great Lakes Environmental Research Laboratory (GLERL) Lake Ontario Temperature Transects NOAA Great Lakes Environmental Research Laboratory (GLERL) Lake Ontario Water Temperatures NOAA Great Lakes Environmental Research Laboratory (GLERL)
Beaches Great Lakes BeachCast Great Lakes Information Network An Internet gateway to information on Great Lakes beach conditions, including health advisories, weather, monitoring data and more. Toronto Beach Monitoring Environmental Defence Canada Information about the Blue Flag beach health initiative and the pilot program in the City of Toronto.
Boating Safety/Security Advisories Information for U.S. and Canadian Cross-Border Boaters U.S. Coast Guard Ninth District Information and requirements for U.S. and Canadian recreational boaters planning cross-border travel on the Great Lakes. Ninth Coast Guard District Public Information Site U.S. Coast Guard Ninth District News on active Coast Guard searches and rescues. Requirements for Foreign Recreational Boaters In Canadian Waters Canadian Coast Guard, Office of Boating Safety Information on boating safety and environmental protection regulations in Canadian Waters. What American Boaters Need to Know When Entering Canada U.S. Coast Guard, Office of Boating Safety Important contact information and guidelines for boaters entering Canadian Waters.
Fishing Conditions Lake Ontario and Salmon River Fishing Report CyberAngler.com Let's Fish Ontario! Ontario Ministry of Natural Resources Ontario fishing information and resources.
Lock & Port Updates Great Lakes St. Lawrence Seaway System : Customer Advisories Great Lakes St. Lawrence Seaway System Updates and advisories for Great Lakes locks and canals.
Ice Conditions Eastern Great Lakes Ice Analysis NOAA National Ice Center
Related Resources GLIN: Agencies and Organizations, Weather GLIN: Climate Change in the Great Lakes Region GLIN: Great Lakes-St. Lawrence Hydrology GLIN: Great Lakes-St. Lawrence Water Flows GLIN: Great Lakes-St. Lawrence Water Levels
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