206 FZUS61 KBUF 160802 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 402 AM EDT Fri Oct 16 2026 For waters beyond five nautical miles of shore on Lake Ontario Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...A 29.5 inch low will move across southern Ontario province this morning, then continue to move northeast across the Saint Lawrence Valley this afternoon before reaching the Canadian Maritimes by Saturday while deepening to 29.1 inches. A 30.5 inch high will then build into the Ohio Valley Saturday night before expanding across the lower Great Lakes and New England Sunday through Monday. A broad ridge of high pressure averaging 30.4 inches will remain in place across the Ohio Valley and Great Lakes much of next week. LOZ062-161500- Lake Ontario open waters from the Niagara River to Hamlin Beach- 402 AM EDT Fri Oct 16 2026 .TODAY...Southwest winds 15 to 20 knots becoming northwest and increasing to 30 knots. Periods of rain this morning, then a chance of showers this afternoon. Waves 2 to 4 feet building to 5 to 8 feet. Waves occasionally around 10 feet. .TONIGHT...Northwest winds 20 to 25 knots becoming north. A chance of showers early. Waves 4 to 7 feet. Waves occasionally around 9 feet. .SATURDAY...North winds 15 to 25 knots becoming northwest and diminishing to 10 to 15 knots. Waves 3 to 6 feet subsiding to 1 to 2 feet. .SATURDAY NIGHT...West winds 10 to 15 knots becoming southwest. Waves 1 to 3 feet. .SUNDAY...Southwest winds 10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .MONDAY...Southwest winds 10 knots or less becoming west. Waves 2 feet or less. .TUESDAY...North winds 10 knots or less becoming northeast. Waves 1 foot or less. $$ LOZ063>065-161500- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 402 AM EDT Fri Oct 16 2026 .TODAY...South winds to 30 knots becoming west. Periods of rain through early afternoon, then a chance of showers late. Waves 5 to 8 feet. Waves occasionally around 10 feet. .TONIGHT...Northwest winds 20 to 25 knots becoming north. A chance of showers early. Waves 5 to 8 feet. Waves occasionally around 10 feet. .SATURDAY...North winds 15 to 25 knots becoming northwest and diminishing to 10 to 15 knots. Waves 5 to 8 feet subsiding to 1 to 3 feet. Waves occasionally around 10 feet. .SATURDAY NIGHT...Northwest winds 10 to 15 knots becoming southwest. Waves 1 to 3 feet. .SUNDAY...Southwest winds 10 to 15 knots becoming south. Waves 2 to 4 feet subsiding to 1 to 3 feet. .MONDAY...South winds 5 to 15 knots becoming west less than 10 knots. Waves 1 to 3 feet subsiding to 1 foot or less. .TUESDAY...North winds 10 knots or less becoming northeast. Waves 1 foot or less. $$ LOZ061-161500- MAFOR 1609/ ONTARIO WEST 1/2 12526 11636 11640 12730 12830. A chance of showers this afternoon. Waves 2 to 4 feet building to 5 to 8 feet, and occasionally around 10 feet today. Waves 5 to 8 feet, and occasionally around 10 feet tonight. ONTARIO EAST 1/2 12436 11536 11630 12730 12830. Waves 3 to 6 feet building to 5 to 8 feet, and occasionally around 10 feet today. Waves 5 to 8 feet, and occasionally around 10 feet tonight. $$  083 FZUS63 KMQT 160801 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 400 AM EDT Fri Oct 16 2026 For waters beyond 5 nautical miles of shore on Lake Superior. Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS... A 29.6 inch low over southern Ontario this morning lifts to southern Quebec at 29.5 inches this afternoon. In its wake, a 30.8 inch high lifting off of the Central Rockies weakens to 30.6 inches today as it moves east over the Plains. This evening, the aforementioned low deepens to 29.4 inches and heads towards the Mouth of the St. Lawrence River. The high then slides south of the Great Lakes at 30.5 inches by Saturday night as a 29.2 inch Alberta Clipper moves through the northern Canadian Prairie Provinces towards Hudson Bay, deepening to 29.1 inches by the time it arrives on Sunday. By Sunday, the high will build to 30.6 inches over the northeastern CONUS. As the low moves east over Hudson Bay and weakens with time Sunday night into Monday afternoon, expect high pressure of 30.3 inches to return to the Upper Great Lakes by late Monday. The high pressure strengthens to 30.4 inches over Lake Superior by Tuesday, then 30.5 inches over northeastern Ontario Tuesday evening and 30.6 inches over Quebec Wednesday. LSZ162-162000- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 400 AM EDT Fri Oct 16 2026 /300 AM CDT Fri Oct 16 2026/ ...GALE WARNING IN EFFECT UNTIL 2 PM EDT /1 PM CDT/ THIS AFTERNOON... .EARLY THIS MORNING...North gales to 40 knots. A slight chance of showers. Waves 3 to 6 feet occasionally to 8 feet building to 6 to 9 feet occasionally to 11 feet. .TODAY...North gales to 40 knots diminishing to 15 to 25 knots late. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. .TONIGHT...Northwest winds 10 to 20 knots backing west after midnight, then becoming southwest 20 to 30 knots late. Waves subsiding to calm to 2 feet, then building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Southwest gales to 35 knots diminishing to 20 to 30 knots late. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .SATURDAY NIGHT...Southwest gales to 40 knots. Waves building to 9 to 12 feet occasionally to 15 feet. .SUNDAY...Southwest gales to 40 knots. Waves subsiding to 5 to 8 feet occasionally to 10 feet. .SUNDAY NIGHT...Southwest winds 20 to 30 knots becoming west 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots veering northeast. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ263-162000- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 400 AM EDT Fri Oct 16 2026 ...GALE WARNING IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON... .EARLY THIS MORNING...North gales to 35 knots. A chance of showers. Waves 5 to 8 feet occasionally to 10 feet building to 9 to 12 feet occasionally to 15 feet. .TODAY...North gales to 40 knots diminishing to 20 to 30 knots late. A chance of rain showers through early afternoon. Waves building to 11 to 15 feet occasionally to 19 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. .TONIGHT...North winds 10 to 20 knots becoming west 5 to 15 knots after midnight, then increasing to 20 to 30 knots late. Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Southwest winds 20 to 30 knots increasing to gales to 35 knots in the afternoon. Waves building to 9 to12 feet occasionally to 15 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .SATURDAY NIGHT...Southwest gales to 40 knots. Waves subsiding to 5 to 8 feet occasionally to 10 feet, then building to 10 to 14 feet occasionally to 18 feet. .SUNDAY...Southwest gales to 40 knots. Waves subsiding to 6 to 9 feet occasionally to 11 feet. .SUNDAY NIGHT...Southwest winds 20 to 30 knots becoming west 10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet. .MONDAY...West winds 5 to 15 knots becoming south less than 10 knots. Waves subsiding to calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. $$ LSZ264-162000- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 400 AM EDT Fri Oct 16 2026 ...GALE WARNING IN EFFECT THROUGH THIS AFTERNOON... .EARLY THIS MORNING...North gales to 35 knots. Showers likely. Waves 4 to 7 feet occasionally to 9 feet building to 7 to 10 feet occasionally to 13 feet. .TODAY...North gales to 40 knots. A chance of rain showers through early afternoon. Waves building to 10 to 14 feet occasionally to 18 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .TONIGHT...North winds 15 to 25 knots becoming northwest 5 to 15 knots after midnight, then becoming west 15 to 25 knots late. Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...West winds 20 to 30 knots increasing to gales to 35 knots in the afternoon, then diminishing to 20 to 30 knots late. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .SATURDAY NIGHT...Southwest winds 20 to 30 knots increasing to gales to 35 knots after midnight. Waves subsiding to 5 to 8 feet occasionally to 10 feet, then building to 9 to 12 feet occasionally to 15 feet. .SUNDAY...Southwest gales to 35 knots. Waves building to 10 to 14 feet occasionally to 18 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots becoming west 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .MONDAY...West winds 5 to 15 knots diminishing to less than 10 knots. Waves subsiding to calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. $$ LSZ265-162000- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 400 AM EDT Fri Oct 16 2026 ...GALE WARNING IN EFFECT THROUGH THIS EVENING... .EARLY THIS MORNING...North gales to 35 knots. Showers. Waves 2 to 4 feet building to 5 to 8 feet occasionally to 10 feet. .TODAY...North gales to 45 knots. A chance of showers. Waves building to 15 to 20 feet occasionally to 25 feet, then subsiding to 10 to 14 feet occasionally to 18 feet. .TONIGHT...North winds 20 to 30 knots becoming northwest 10 to 20 knots after midnight, then becoming west 15 to 25 knots late. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .SATURDAY...West winds 20 to 30 knots becoming southwest 15 to 25 knots late. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 1 to 3 feet. .SATURDAY NIGHT...Southwest winds 15 to 25 knots. Waves building to 3 to 6 feet occasionally to 8 feet. .SUNDAY...Southwest winds 20 to 30 knots diminishing to 15 to 25 knots by mid afternoon. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots becoming south 10 to 20 knots. Waves calm to 2 feet. $$ LSZ266-162000- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- 400 AM EDT Fri Oct 16 2026 ...GALE WARNING IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH THIS EVENING... .EARLY THIS MORNING...North winds 20 to 30 knots. Showers. Waves 2 to 4 feet building to 4 to 7 feet occasionally to 9 feet. .TODAY...North gales to 45 knots. A chance of showers through early afternoon. Waves building to 15 to 20 feet occasionally to 25 feet, then subsiding to 12 to 17 feet occasionally to 21 feet. .TONIGHT...North winds 20 to 30 knots becoming northwest 15 to 25 knots after midnight, then backing west late. Waves subsiding to 2 to 4 feet. .SATURDAY...West winds 20 to 30 knots backing southwest late. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .SATURDAY NIGHT...Southwest winds 15 to 25 knots increasing to 20 to 30 knots after midnight. Waves subsiding to 4 to 8 feet occasionally to 10 feet. .SUNDAY...Southwest winds 20 to 30 knots diminishing to 15 to 25 knots by mid afternoon. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .MONDAY...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. $$ LSZ267-162000- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 400 AM EDT Fri Oct 16 2026 ...GALE WARNING IN EFFECT FROM 11 AM EDT THIS MORNING THROUGH THIS EVENING... .EARLY THIS MORNING...North winds 15 to 25 knots. Showers. Waves 1 to 3 feet building to 3 to 5 feet occasionally to 7 feet. .TODAY...North gales to 40 knots. A chance of showers through early afternoon. Waves building to 12 to 17 feet occasionally to 21 feet, then subsiding to 10 to 14 feet occasionally to 18 feet. .TONIGHT...North gales to 35 knots diminishing to 15 to 25 knots after midnight, then becoming west 10 to 20 knots late. A slight chance of rain showers. Waves subsiding to 2 to 4 feet. .SATURDAY...West winds 15 to 25 knots becoming southwest 20 to 30 knots in the afternoon, then diminishing to 15 to 25 knots late. Waves building to 5 to 8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .SATURDAY NIGHT...Southwest winds 15 to 25 knots increasing to 20 to 30 knots after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet, then building to 5 to 8 feet occasionally to 10 feet. .SUNDAY...Southwest winds 20 to 30 knots. Waves building to 6 to 9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .SUNDAY NIGHT...Southwest winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet. .MONDAY...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. $$ LSZ261-161400- MAFOR 1609/ Superior West...GALE WARNING IN EFFECT...13850 11840 11820 11720 11710 11620. Waves 4 to 7 feet building to 8 to 12 feet, then subsiding to 5 to 8 feet today. Waves 3 to 5 feet subsiding to 1 to 2 feet tonight. Superior North Central...GALE WARNING IN EFFECT...11856 11850 11860 11850 12840 11720 11620. Waves 3 to 5 feet building to 10 to 14 feet today. Waves 7 to 10 feet subsiding to 2 to 4 feet tonight. Superior South Central...GALE WARNING IN EFFECT...12856 12860 12850 11830 11720. Waves 2 to 4 feet building to 13 to 17 feet today. Waves 10 to 14 feet subsiding to 3 to 5 feet tonight. Superior East...GALE WARNING IN EFFECT...11836 14850 11840 11830 11720. Waves 2 to 3 feet building to 10 to 14 feet today. Waves 10 to 13 feet subsiding to 3 to 5 feet tonight. $$ WFO MQT Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes  250 FZUS61 KBUF 160803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Fri Oct 16 2026 SLZ022-024-161500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Fri Oct 16 2026 .TODAY...Southeast winds 15 to 20 knots becoming west 10 to 15 knots. Periods of rain. .TONIGHT...Northwest winds 10 to 15 knots. A chance of rain showers early. .SATURDAY...Northwest winds 5 to 15 knots. Mostly sunny. .SATURDAY NIGHT...West winds less than 10 knots becoming southwest. Mainly clear. .SUNDAY...Southwest winds 5 to 15 knots. Mainly clear. .MONDAY...Southwest winds 5 to 10 knots becoming light and variable. Mainly clear. .TUESDAY...Light and variable winds. Mainly clear. $$