959 FZUS63 KDTX 230719 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 319 AM EDT Sun Aug 23 2026 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...Post-frontal northwest flow brings breezy conditions through Monday. Chances for some showers and an isolated thunderstorm will return this afternoon and evening, favored across Lake Huron, High pressure, 30.10 inches, willl move over the Great Lakes late tomorrow into Tuesday. LCZ460-231530- Lake St Clair- 319 AM EDT Sun Aug 23 2026 .TODAY...Northwest winds 15 to 20 knots. Mostly sunny. A chance of showers and thunderstorms late in the afternoon. Waves 1 to 3 feet. .TONIGHT...Northwest winds 15 to 20 knots. Partly cloudy in the evening then clearing. A chance of showers and thunderstorms early in the evening. Waves 1 to 3 feet. .MONDAY...West winds 15 to 20 knots. Mostly sunny. Waves 2 feet or less. .MONDAY NIGHT...Northwest winds 10 to 15 knots diminishing to 5 to 10 knots in the late evening and overnight. Mostly clear. Waves 2 feet or less. .TUESDAY...Northwest winds 5 to 10 knots in the morning becoming light and variable...then becoming south 5 to 10 knots in the evening. Sunny in the morning becoming mostly clear. Waves 2 feet or less. .WEDNESDAY...South winds 10 to 15 knots. Mostly clear. A chance of showers and thunderstorms. Waves 2 feet or less. .THURSDAY...West winds 10 to 15 knots. Partly cloudy. A chance of showers and thunderstorms. Waves 2 feet or less. $$ CB Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes  097 FZUS63 KDTX 230722 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 322 AM EDT Sun Aug 23 2026 For waters beyond five nautical miles off shore on Lake Huron 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...Post-frontal northwest flow brings breezy conditions through Monday. Chances for some rain showers and an isolated thunderstorm will return this afternoon and evening, favored across Lake Huron, High pressure, 30.10 inches, willl move over the Great Lakes late tomorrow into Tuesday. LHZ361-231530- Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 322 AM EDT Sun Aug 23 2026 .TODAY...Northwest winds 20 to 25 knots with gusts to around 30 knots. Waves 5 to 7 feet. Waves occasionally around 10 feet. .TONIGHT...Northwest winds 20 to 25 knots with gusts to around 30 knots. A chance of showers. Waves 6 to 9 feet. Waves occasionally around 12 feet. .MONDAY...Northwest winds 20 to 25 knots decreasing to 15 to 20 knots in the late morning and afternoon. Gusts to 30 knots. A chance of showers in the morning. Waves 5 to 7 feet. Waves occasionally around 10 feet. .MONDAY NIGHT...Northwest winds 15 to 20 knots decreasing to 5 to 10 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet after midnight. .TUESDAY...Northwest winds 5 to 10 knots becoming light and variable...then becoming south 5 to 10 knots late in the evening. Waves 2 feet or less. .WEDNESDAY...South winds 5 to 10 knots becoming southeast 10 to 15 knots until early evening...then becoming south 5 to 10 knots by midnight. A chance of showers early in the morning. A chance of thunderstorms. Rain showers . Waves 1 to 3 feet. .THURSDAY...Southwest winds 10 to 15 knots veering to the northwest . A chance of showers. Waves 1 to 3 feet. $$ LHZ362-363-231530- Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- 322 AM EDT Sun Aug 23 2026 .TODAY...Northwest winds 20 to 25 knots increasing to 30 knots in the late morning and afternoon. A chance of waterspouts in the morning. Waves 8 to 12 feet. Waves occasionally around 15 feet. .TONIGHT...Northwest winds to 30 knots. A chance of waterspouts in the evening. A chance of showers in the evening...then showers likely after midnight. Waves 8 to 12 feet. Waves occasionally around 15 feet. .MONDAY...Northwest winds to 30 knots decreasing to 20 to 25 knots in the late morning and afternoon. Waves 8 to 12 feet. Waves occasionally around 15 feet. .MONDAY NIGHT...Northwest winds 15 to 20 knots with gusts to around 30 knots decreasing to 10 to 15 knots after midnight. Waves 4 to 6 feet. .TUESDAY...Northwest winds 5 to 10 knots becoming light and variable...then becoming southeast 5 to 10 knots late in the evening. Waves 2 to 4 feet subsiding to 2 feet or less. Waves occasionally around 8 feet. .WEDNESDAY...South winds 5 to 10 knots increasing to 10 to 15 knots in the late morning and early afternoon...then increasing to 15 to 20 knots early in the evening decreasing to 10 to 15 knots by midnight. A chance of showers in the late morning and early afternoon. Rain showers likely. A chance of thunderstorms by midnight. Waves 1 to 3 feet building to 2 to 4 feet . .THURSDAY...Southwest winds 10 to 15 knots decreasing to 5 to 10 knots early in the evening...then becoming west 10 to 15 knots by midnight. A chance of showers. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$ LHZ462>464-231530- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to PortHuron beyond 5NM Off Shore- 322 AM EDT Sun Aug 23 2026 .TODAY...Northwest winds 20 to 25 knots with gusts to around 30 knots. A chance of showers in the morning...then a chance of showers and thunderstorms in the afternoon. Waves 8 to 12 feet. Waves occasionally around 15 feet. .TONIGHT...Northwest winds 15 to 20 knots increasing to 20 to 25 knots late in the evening...then decreasing to 15 to 20 knots after midnight increasing to 20 to 25 knots early in the morning. Gusts to 30 knots. A chance of showers and thunderstorms in the evening...then a chance of showers after midnight. Waves 8 to 12 feet. Waves occasionally around 15 feet. .MONDAY...West winds 20 to 25 knots becoming northwest 15 to 20 knots early in the afternoon. Gusts to 30 knots. A chance of showers in the morning. Waves 6 to 9 feet. Waves occasionally around 12 feet. .MONDAY NIGHT...Northwest winds 10 to 15 knots. Waves 4 to 6 feet. Waves occasionally around 8 feet. .TUESDAY...Northwest winds 10 to 15 knots decreasing to 5 to 10 knots late in the morning...then becoming light and variable late in the afternoon becoming southeast 5 to 10 knots late in the evening. Waves 2 to 4 feet subsiding to 1 to 3 feet. .WEDNESDAY...South winds 5 to 10 knots increasing to 10 to 15 knots in the late morning and early afternoon...then increasing to 15 to 20 knots early in the evening decreasing to 10 to 15 knots by midnight. Showers likely and a chance of thunderstorms . Waves 1 to 3 feet building to 2 to 4 feet by midnight. .THURSDAY...South winds 10 to 15 knots becoming southwest 5 to 10 knots early in the evening...then veering to the northwest by midnight. Showers likely early in the morning...then a chance of showers. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$ LHZ461-231530- MAFOR 2309/ HURON NORTH 14730 11730 11736 12746. A chance of waterspouts today and this evening. Waves 5 to 7 feet. Occasional wave height around 10 feet. HURON SOUTH 14730 11730 13736. A chance of thunderstorms today and this evening. Waves 6 to 9 feet. Occasional wave height around 12 feet. $$ CB Experimental modernized open lake forecast is available online at weather.gov/dtx/glftable (all lower case) Graphical marine forecasts are available online at weather.gov/greatlakes (all lower case)  634 FZUS61 KCLE 230755 GLFLE Open Lake Forecast for Lake Erie National Weather Service Cleveland OH 355 AM EDT Sun Aug 23 2026 For waters beyond five nautical miles of shore on Lake Erie 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 trough averaging 29.80 will linger over the eastern Great Lakes today through Monday morning. High pressure 30.00 inches will gradually build into the region Monday afternoon through Tuesday night before departing to the east on Wednesday. Low pressure 29.80 inches and a trailing cold front will moves across the Great Lakes late Wednesday through Thursday. LEZ162-163-231415- Detroit River Lt. to Maumee Bay OH to Reno Beach OH beyond 5NM offshoreline to US-Canadian border- Reno Beach to The Islands OH beyond 5NM off shoreline to US- Canadian border- 355 AM EDT Sun Aug 23 2026 .TODAY...Northwest winds 15 to 20 knots becoming west. A chance of waterspouts late. A slight chance of showers and thunderstorms late. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TONIGHT...West winds 15 to 20 knots becoming northwest. A chance of waterspouts early. A slight chance of showers and thunderstorms early. Waves 2 to 4 feet subsiding to 1 to 3 feet. .MONDAY...Northwest winds 15 to 20 knots becoming west. Waves 1 to 3 feet building to 2 to 4 feet. .MONDAY NIGHT...West winds 15 to 20 knots becoming northwest and diminishing to around 10 knots. Waves 1 to 3 feet. .TUESDAY...Northwest winds 10 knots or less becoming southwest. Waves 1 foot or less. .WEDNESDAY...Southwest winds 5 to 15 knots. A chance of showers Wednesday night. Waves 2 feet or less. .THURSDAY...Southwest winds 5 to 15 knots becoming northwest. A chance of showers and thunderstorms during the day. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LEZ164-165-231415- The Islands to Vermilion OH beyond 5 nm off shoreline to US- Canadian border- Vermilion to Avon Point OH beyond 5 nm off shoreline to US- Canadian border- 355 AM EDT Sun Aug 23 2026 .TODAY...Northwest winds 15 to 20 knots becoming west. A chance of waterspouts early. A chance of waterspouts late. A slight chance of showers early. A slight chance of showers and thunderstorms late. Waves 3 to 5 feet subsiding to 2 to 4 feet. .TONIGHT...West winds 15 to 20 knots becoming northwest. A chance of waterspouts through the early overnight. A chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. Waves 3 to 5 feet. .MONDAY...Northwest winds 15 to 20 knots becoming west. Waves 2 to 4 feet building to 3 to 5 feet. .MONDAY NIGHT...West winds 15 to 20 knots becoming northwest 10 to 15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet. .TUESDAY...Northwest winds 10 knots or less becoming southwest. Waves 1 foot or less. .WEDNESDAY...Southwest winds 5 to 15 knots becoming south. A chance of showers and thunderstorms Wednesday night. Waves 2 feet or less. .THURSDAY...Southwest winds 5 to 15 knots becoming northwest. A chance of showers and thunderstorms during the day, then a chance of showers Thursday night. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$ LEZ061-166>169-231415- Ripley to Buffalo NY extending from 5NM off shoreline to US- Canadian border- Avon Point to Willowick OH beyond 5 nm off shoreline to US- Canadian border-Willowick to Geneva-on-the- Lake OH beyond 5NM off shoreline to US-Canadian border-Geneva-on- the-Lake to Conneaut OH beyond 5 nm off shoreline to US- Canadian border- Conneaut OH to Ripley NY beyond 5 nm off shoreline to US- Canadian border- 355 AM EDT Sun Aug 23 2026 .TODAY...Northwest winds 15 to 25 knots becoming west. A chance of waterspouts. A chance of showers and thunderstorms. Waves 3 to 6 feet. .TONIGHT...West winds 15 to 20 knots becoming northwest. A chance of waterspouts. Showers with a chance of thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. A chance of showers with a slight chance of thunderstorms late. Waves 3 to 6 feet. .MONDAY...West winds 15 to 25 knots. A chance of waterspouts. A chance of showers. Waves 3 to 6 feet building to 5 to 7 feet. Waves occasionally around 9 feet. .MONDAY NIGHT...West winds 15 to 25 knots becoming northwest and diminishing to 10 to 15 knots. A chance of showers in the evening. A chance of waterspouts. Waves 4 to 7 feet subsiding to 1 to 3 feet. Waves occasionally around 9 feet. .TUESDAY...Northwest winds 5 to 15 knots becoming southwest. Waves 1 to 3 feet subsiding to 1 foot or less. .WEDNESDAY...Southwest winds 5 to 15 knots becoming south. A chance of showers Wednesday night. Waves 2 feet or less. .THURSDAY...South winds 5 to 15 knots becoming west. A chance of showers and thunderstorms during the day, then a chance of showers Thursday night. Waves 1 to 3 feet. Winds and waves higher in and near thunderstorms. $$ LEZ161-231415- MAFOR 2309/ ERIE WEST 1/3 13720 12620 13720. A chance of waterspouts early this morning. A chance of waterspouts this afternoon. A chance of waterspouts this evening. A chance of showers and thunderstorms this evening. Waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet today. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight. ERIE CENTRAL 1/3 13720 12620 11726 12720. A chance of waterspouts. A chance of thunderstorms this evening. Waves 3 to 6 feet. ERIE EAST 1/3 11620 11626 11620 11630 11620 11626 11726 11620. A chance of waterspouts. A chance of thunderstorms. Waves 3 to 6 feet. $$  599 FZUS63 KMKX 230755 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 255 AM CDT Sun Aug 23 2026 FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON Lake Michigan. Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the wave, along with the average height of the highest 10% of the waves which will occasionally be encountered. .SYNOPSIS... Isolated showers and storms will remain possible over the lake through mid morning, with a small chance for a waterspout. Otherwise, breezy north to northwest winds will persist today due to being sandwiched between deepening low pressure around 29.7 inches over the eastern Great Lakes and high pressure of 30.2 inches building in from the northwest. Winds will eventually become lighter by midday Monday, persisting into Tuesday as the high moves overhead. Breezy southerly winds will develop later Tuesday into Wednesday as the high exits and low pressure of 29.6 inches approaches from Manitoba. LMZ261-362-364-366-563-565-567-868-231515- Lake Michigan from Seul Choix Point to Rock Island Passage 5 NM offshore to Mid Lake- Lake Michigan South of a line from Seul Choix Point to the Mackinac Bridge and north of a line from Charlevoix MI to South Fox Island 5 NM offshore- Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to Mid Lake- Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to Mid Lake- Lake Michigan from Rock Island Passage to Sturgeon Bay WI- Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to Mid Lake- Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to Mid Lake- Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid Lake- 255 AM CDT Sun Aug 23 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... .TODAY...Northwest winds 15 to 25 kt becoming north to 30 kt. Waves 4 to 7 ft occasionally to 9 ft. .TONIGHT...North winds to 30 kt becoming northwest. Waves 4 to 7 ft occasionally to 9 ft. .MONDAY...Northwest winds 15 to 25 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. .MONDAY NIGHT...Northwest winds 10 to 20 kt diminishing to 5 to 10 kt overnight. Waves 2 to 4 ft subsiding to 1 to 2 ft. .TUESDAY...Southwest winds 10 to 15 kt increasing to 15 to 25 kt in the afternoon. Waves 1 to 2 ft building to 2 to 4 ft. .TUESDAY NIGHT...South winds 15 to 25 kt diminishing to 10 to 20 kt. Chance of showers. Waves 3 to 5 ft. .WEDNESDAY...Southwest winds 15 to 25 kt becoming south to 30 kt. Showers likely with a chance of thunderstorms. Waves 4 to 6 ft occasionally to 8 ft. .THURSDAY...Northwest winds 10 to 20 kt increasing to 30 kt. Waves 1 to 3 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-231515- Lake Michigan from Michigan City IN to St. Joseph MI 5 NM offshore to Mid Lake- Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore to Mid Lake- Lake Michigan from Port Washington to North Point Light WI 5 NM offshore to Mid Lake- Lake Michigan from North Point Light to Wind Point WI 5 NM offshore to Mid Lake- Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM offshore to Mid Lake- Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid Lake- Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to Mid Lake- Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid Lake- Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid Lake- Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to Mid Lake- 255 AM CDT Sun Aug 23 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... .TODAY...Northwest winds 15 to 25 kt becoming north. Slight chance of waterspouts this morning. Waves 5 to 8 ft occasionally to 10 ft. .TONIGHT...North winds 15 to 25 kt diminishing to 10 to 20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft. .MONDAY...Northwest winds 10 to 20 kt becoming north. Waves 2 to 4 ft. .MONDAY NIGHT...Northeast winds 10 to 15 kt backing to southwest. Waves 1 to 3 ft subsiding to 1 to 2 ft. .TUESDAY...Southwest winds 10 to 15 kt becoming south 10 to 20 kt. Waves 1 to 2 ft building to 2 to 4 ft. .TUESDAY NIGHT...South winds 15 to 25 kt becoming southwest 10 to 20 kt. Waves 3 to 5 ft. .WEDNESDAY...Southwest winds 15 to 25 kt increasing to 30 kt. Chance of showers and thunderstorms. Waves 4 to 6 ft occasionally to 8 ft. .THURSDAY...Northwest winds 10 to 20 kt becoming north. Waves 2 to 4 ft. $$ LMZ761-231515- MAFOR 2310/ MICHIGAN NORTH 12730 12740 13840 11740. Waves 3 to 6 feet. MICHIGAN SOUTH 11720 12730 12830 12820 11810. Waves 3 to 6 feet building to 4 to 7 feet today. Waves 3 to 6 feet subsiding to 2 to 4 feet tonight. $$ Cronce Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes