005 FZUS53 KLOT 230801 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 301 AM CDT Sun Aug 23 2026 For waters within 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 waves, along with the average height of the highest 10 percent of the waves which will occasionally be encountered. LMZ740-231530- Winthrop Harbor to Wilmette Harbor IL- 301 AM CDT Sun Aug 23 2026 .TODAY...Northwest winds 10 to 15 kt becoming north in the afternoon. Sunny in the morning, then becoming partly cloudy. Waves 1 to 3 ft building to 2 to 4 ft. .TONIGHT...North winds 10 to 15 kt becoming northwest 5 to 10 kt. Partly cloudy in the evening, then becoming mostly clear. Waves 2 to 4 ft subsiding to 1 to 3 ft. .MONDAY...Northwest winds 5 to 10 kt becoming northeast in the afternoon. Mostly sunny. Waves 1 to 3 ft. .MONDAY NIGHT...Southeast winds around 5 kt becoming southwest overnight. Mostly clear. Waves 1 to 2 ft. $$ LMZ741-742-231530- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 301 AM CDT Sun Aug 23 2026 .TODAY...Northwest winds 10 to 15 kt becoming north in the afternoon. Sunny in the morning, then becoming partly cloudy. Waves 2 to 4 ft building to 3 to 5 ft. .TONIGHT...North winds 10 to 15 kt becoming northwest overnight. Partly cloudy in the evening, then becoming clear. Waves 3 to 5 ft subsiding 2 to 4 ft. .MONDAY...West winds 5 to 10 kt becoming northeast in the afternoon. Mostly sunny. Waves 1 to 3 ft. .MONDAY NIGHT...East winds 5 to 10 kt becoming southwest overnight. Partly cloudy in the evening, then becoming mostly clear. Waves 1 to 2 ft. $$ LMZ743>745-231530- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 301 AM CDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...Northwest winds 10 to 15 kt becoming north and increasing to 15 to 20 kt in the afternoon. Mostly sunny in the morning, then becoming partly cloudy. Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. .TONIGHT...North winds 10 to 15 kt becoming northwest overnight. Partly cloudy in the evening, then becoming mostly clear. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. .MONDAY...West winds 5 to 10 kt becoming north in the afternoon. Mostly sunny. Waves 2 to 4 ft subsiding to 1 to 3 ft. .MONDAY NIGHT...East winds around 10 kt becoming south overnight. Mostly clear. Waves 1 to 2 ft. $$ Yack  149 FZUS51 KBUF 230803 NSHBUF Nearshore Marine Forecast National Weather Service Buffalo NY 403 AM EDT Sun Aug 23 2026 For waters within five nautical miles of shore Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. LEZ020-231500- Upper Niagara River and Buffalo Harbor- 403 AM EDT Sun Aug 23 2026 .TODAY...West winds 5 to 15 knots. A chance of showers early, then showers with a chance of thunderstorms from late morning on. .TONIGHT...West winds 5 to 10 knots. Showers likely with a chance of thunderstorms in the evening, then showers likely overnight. .MONDAY...West winds 5 to 15 knots increasing to 15 to 20 knots. Showers. .MONDAY NIGHT...West winds 5 to 15 knots. Showers likely in the evening. .TUESDAY...West winds 5 to 10 knots becoming light and variable. Partly cloudy. .WEDNESDAY...Southwest winds less than 10 knots becoming south. Partly cloudy. .THURSDAY...South winds 10 knots or less becoming southwest. A chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. The water temperature off Buffalo is 76 degrees. $$ LOZ030-231500- Lower Niagara River- 403 AM EDT Sun Aug 23 2026 .TODAY...West winds 5 to 15 knots. A chance of showers early, then a chance of showers and thunderstorms late this morning. Showers with a chance of thunderstorms this afternoon. .TONIGHT...West winds 5 to 15 knots becoming southwest. A chance of showers and thunderstorms in the evening, then showers likely overnight. .MONDAY...Southwest winds 10 to 15 knots becoming west 15 to 20 knots. Showers likely. .MONDAY NIGHT...West winds 15 to 20 knots diminishing to 5 to 10 knots. Showers likely in the evening, then a chance of showers overnight. .TUESDAY...West winds 5 to 10 knots becoming light and variable. A chance of showers during the day. .WEDNESDAY...Southwest winds 10 knots or less becoming south. Partly cloudy. .THURSDAY...South winds 10 knots or less becoming southwest. A chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$ LEZ040-041-231500- Buffalo to Ripley along Lake Erie- 403 AM EDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH LATE MONDAY NIGHT... .TODAY...West winds 15 to 25 knots. A chance of waterspouts. Showers with a chance of thunderstorms. Waves 2 to 4 feet building to 3 to 6 feet. Waves occasionally around 7 feet. .TONIGHT...West winds 15 to 20 knots diminishing to 10 to 15 knots. A chance of waterspouts. Showers with a chance of thunderstorms. Waves 3 to 6 feet subsiding to 2 to 4 feet. Waves occasionally around 7 feet. .MONDAY...West winds 15 to 25 knots increasing to 30 knots. A chance of waterspouts. Showers. Waves 2 to 4 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .MONDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to 15 knots. A chance of waterspouts. Showers in the evening, then showers likely overnight. Waves 4 to 7 feet subsiding to 1 to 3 feet. Waves occasionally around 9 feet. .TUESDAY...West winds 5 to 15 knots becoming southwest less than 10 knots. A chance of waterspouts during the day. A chance of showers during the day. Waves 1 to 3 feet subsiding to 1 foot or less. .WEDNESDAY...Southwest winds 10 knots or less becoming south. Partly cloudy. Waves 1 foot or less. .THURSDAY...South winds 5 to 10 knots becoming southwest. A chance of showers and thunderstorms. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ042-231500- Niagara River to Hamlin Beach along Lake Ontario- 403 AM EDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH TUESDAY EVENING... .TODAY...Southwest winds 15 to 25 knots becoming west. A chance of waterspouts. A chance of showers this morning, then showers with a chance of thunderstorms this afternoon. Waves 1 to 3 feet building to 3 to 6 feet. Waves occasionally around 7 feet. .TONIGHT...West winds 15 to 25 knots becoming southwest. A chance of waterspouts. Showers likely with a chance of thunderstorms in the evening, then showers likely overnight. Waves 3 to 6 feet. Waves occasionally around 7 feet. .MONDAY...Southwest winds 15 to 25 knots becoming west to 30 knots. A chance of waterspouts. Showers. Waves 3 to 6 feet building to 5 to 8 feet. Waves occasionally around 10 feet. .MONDAY NIGHT...West winds to 30 knots diminishing to 15 to 20 knots. A chance of waterspouts. Showers in the evening, then a chance of showers overnight. Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally around 9 feet. .TUESDAY...West winds 15 to 20 knots diminishing to less than 10 knots. A chance of waterspouts during the day. A chance of showers during the day. Waves 3 to 5 feet subsiding to 1 foot or less. Waves occasionally around 6 feet. .WEDNESDAY...Southwest winds 10 knots or less becoming south. Partly cloudy. Waves 1 foot or less. .THURSDAY...South winds 5 to 15 knots becoming southwest. A chance of showers and thunderstorms. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ043-231500- Hamlin Beach to Sodus Bay along Lake Ontario including Irondequoit Bay- 403 AM EDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH TUESDAY EVENING... .TODAY...Southwest winds 10 to 15 knots becoming west and increasing to 15 to 25 knots. A chance of waterspouts. Showers likely with a chance of thunderstorms. Waves 1 to 3 feet building to 3 to 5 feet. Waves occasionally around 6 feet. .TONIGHT...West winds 15 to 20 knots becoming southwest. A chance of waterspouts. Showers likely with a chance of thunderstorms in the evening, then a chance of showers overnight. Waves 3 to 6 feet. Waves occasionally around 7 feet. .MONDAY...Southwest winds 15 to 25 knots. A chance of waterspouts. Showers likely. Waves 2 to 4 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .MONDAY NIGHT...Southwest winds 15 to 25 knots becoming west. A chance of waterspouts. Showers likely in the evening, then showers overnight. Waves 3 to 6 feet. Waves occasionally around 7 feet. .TUESDAY...West winds 15 to 20 knots diminishing to 5 to 15 knots. A chance of waterspouts during the day. Showers during the day. Waves 3 to 6 feet subsiding to 2 feet or less. Waves occasionally around 7 feet. .WEDNESDAY...West winds 5 to 10 knots becoming south. Mainly clear, then becoming partly cloudy. Waves 1 foot or less. .THURSDAY...South winds 5 to 10 knots becoming southwest. A chance of showers and thunderstorms during the day, then showers likely with a chance of thunderstorms Thursday night. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. The water temperature off Rochester is 57 degrees. $$ LOZ044-231500- Sodus Bay to Mexico Bay along Lake Ontario- 403 AM EDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH TUESDAY EVENING... .TODAY...South winds 10 to 15 knots becoming west 15 to 20 knots. A chance of waterspouts. Showers with a chance of thunderstorms. Waves 1 to 3 feet building to 2 to 4 feet. .TONIGHT...West winds 15 to 20 knots becoming southwest. A chance of waterspouts. Showers with a chance of thunderstorms in the evening, then showers likely overnight. Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally around 9 feet. .MONDAY...Southwest winds 15 to 25 knots. A chance of waterspouts. Showers in the morning, then showers with a chance of thunderstorms in the afternoon. Waves 3 to 6 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .MONDAY NIGHT...Southwest winds 15 to 25 knots becoming west. A chance of waterspouts. Showers with a chance of thunderstorms in the evening, then showers overnight. Waves 5 to 8 feet. Waves occasionally around 10 feet. .TUESDAY...West winds 15 to 20 knots diminishing to 5 to 15 knots. A chance of waterspouts during the day. Showers during the day. Waves 3 to 6 feet subsiding to 1 to 3 feet. Waves occasionally around 7 feet. .WEDNESDAY...West winds 10 knots or less becoming southeast. Mainly clear, then becoming partly cloudy. Waves 1 foot or less. .THURSDAY...South winds 5 to 15 knots. A chance of showers and thunderstorms during the day, then showers likely with a chance of thunderstorms Thursday night. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ045-231500- Mexico Bay to the Saint Lawrence River along Lake Ontario- 403 AM EDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .TODAY...South winds 15 to 20 knots becoming southwest. A chance of waterspouts. Showers with a chance of thunderstorms. Waves 2 to 4 feet building to 3 to 5 feet. Waves occasionally around 6 feet. .TONIGHT...Southwest winds 15 to 25 knots. A chance of waterspouts. Showers with a chance of thunderstorms in the evening, then showers overnight. Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally around 9 feet. .MONDAY...Southwest winds 15 to 25 knots. A chance of waterspouts. Showers in the morning, then showers with a chance of thunderstorms in the afternoon. Waves 3 to 6 feet building to 5 to 8 feet. Waves occasionally around 10 feet. .MONDAY NIGHT...Southwest winds 15 to 25 knots becoming west. A chance of waterspouts. Showers with a chance of thunderstorms in the evening, then showers overnight. Waves 5 to 8 feet subsiding to 3 to 6 feet. Waves occasionally around 10 feet. .TUESDAY...West winds 15 to 20 knots diminishing to 5 to 15 knots. A chance of waterspouts during the day. Showers during the day. Waves 3 to 6 feet subsiding to 1 to 3 feet. Waves occasionally around 7 feet. .WEDNESDAY...West winds 10 knots or less becoming southeast 10 to 15 knots. Mainly clear, then becoming partly cloudy. Waves 2 feet or less. .THURSDAY...South winds 10 to 15 knots. A chance of showers and thunderstorms during the day, then showers likely with a chance of thunderstorms Thursday night. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. $$  722 FZUS53 KMKX 230810 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 310 AM CDT Sun Aug 23 2026 For waters within five nautical miles of shore on Lake Michigan LMZ643-232100- Sheboygan to Port Washington WI- 310 AM CDT Sun Aug 23 2026 .EARLY THIS MORNING...Northwest wind 10 to 15 knots rising to 15 to 20 knots early in the morning. Clear. Slight chance of waterspouts. Waves 1 to 2 feet. .TODAY...Northwest wind 15 to 20 knots becoming north 10 to 15 knots with gusts to around 20 knots late in the afternoon. Slight chance of waterspouts in the morning. Waves 1 to 2 feet. .TONIGHT...North wind 10 to 15 knots backing northwest early in the morning. Mostly clear. Waves 1 to 2 feet. .MONDAY...Northwest wind 10 to 15 knots becoming north 5 to 10 knots early in the afternoon, then veering east late in the afternoon. Sunny. Waves around 1 foot. .MONDAY NIGHT...South wind 5 to 10 knots veering west early in the morning. Partly cloudy. Waves around 1 foot. $$ LMZ644-232100- Port Washington to North Point Light WI- 310 AM CDT Sun Aug 23 2026 .EARLY THIS MORNING...Northwest wind 5 to 15 knots becoming 10 to 15 knots early in the morning. Clear. Slight chance of waterspouts. Waves 1 to 2 feet. .TODAY...Northwest wind 10 to 15 knots. Slight chance of waterspouts in the morning. Waves 1 to 2 feet. .TONIGHT...North wind 5 to 15 knots becoming 5 to 10 knots late in the evening, then becoming north 5 to 10 knots after midnight. Mostly clear. Waves 1 to 2 feet. .MONDAY...Northwest wind 5 to 10 knots veering northeast late in the afternoon. Sunny. Waves 1 to 2 feet. .MONDAY NIGHT...Southwest wind 5 to 10 knots veering west early in the morning. Partly cloudy. Waves around 1 foot. $$ LMZ645-232100- North Point Light to Wind Point WI- 310 AM CDT Sun Aug 23 2026 .EARLY THIS MORNING...Northwest wind 5 to 10 knots rising to 10 to 15 knots early in the morning. Clear. Slight chance of waterspouts. Waves 1 to 2 feet building to 2 to 4 feet early in the morning. .TODAY...Northwest wind 10 to 15 knots veering north in the afternoon. Slight chance of waterspouts in the morning. Waves 2 to 4 feet subsiding to 1 to 2 feet in the late morning and afternoon. .TONIGHT...North wind 10 to 15 knots easing to 5 to 10 knots in the late evening and early morning, then backing northwest early in the morning. Partly cloudy. Waves 1 to 2 feet. .MONDAY...Northwest wind 5 to 10 knots veering northeast late in the afternoon. Sunny. Waves 1 to 2 feet. .MONDAY NIGHT...Southeast wind 5 to 10 knots veering west early in the morning. Partly cloudy. Waves around 1 foot. $$ LMZ646-232100- Wind Point WI to Winthrop Harbor IL- 310 AM CDT Sun Aug 23 2026 .EARLY THIS MORNING...North wind 5 knots becoming northwest 10 to 15 knots early in the morning. Clear. Slight chance of waterspouts. Waves 1 to 2 feet. .TODAY...Northwest wind 10 to 15 knots veering north early in the afternoon, then backing northwest late in the afternoon. Slight chance of waterspouts in the morning. Waves 1 to 2 feet. .TONIGHT...North wind 5 to 10 knots backing northwest after midnight. Partly cloudy. Waves 1 to 2 feet. .MONDAY...Northwest wind 5 to 10 knots veering northeast late in the afternoon. Sunny. Waves 1 to 2 feet. .MONDAY NIGHT...East wind 5 to 10 knots veering south late in the evening, then veering southwest after midnight veering west early in the morning. Partly cloudy. Waves around 1 foot. $$ See Lake Michigan Open Waters Forecast for Tuesday through Thursday.  552 FZUS53 KGRB 230823 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 323 AM CDT Sun Aug 23 2026 For waters within five nautical miles of shore on Lake Michigan LMZ522-231600- Green Bay south of line from Oconto WI to Little Sturgeon Bay WI- 323 AM CDT Sun Aug 23 2026 .EARLY THIS MORNING...NW wind 10 to 15 kts. Waves 1 to 3 ft. Clear. .TODAY...N wind 10 to 15 kts. Waves 1 to 3 ft. Mostly sunny in the morning then becoming partly cloudy. .TONIGHT...N wind 10 to 15 kts backing NW 5 to 10 kts after midnight. Waves 1 to 3 ft. Clear. .MONDAY...NW wind 5 to 10 kts. Waves 2 ft or less. Sunny in the morning then becoming partly cloudy. .MONDAY NIGHT...SE wind around 5 kts veering SW after midnight. Waves 2 ft or less. Partly cloudy. $$ LMZ521-231600- Green Bay south of line from Cedar River to Rock Island Passage and north of a line from Oconto WI to Little Sturgeon Bay WI- 323 AM CDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING... .EARLY THIS MORNING...NW wind 10 to 20 kts. Waves 2 to 4 ft. Clear. .TODAY...NW wind 15 to 25 kts veering N 10 to 15 kts early in the afternoon. Waves 2 to 4 ft. Mostly sunny in the morning then becoming partly cloudy. .TONIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight. Clear. .MONDAY...NW wind 10 to 15 kts. Waves 1 to 3 ft. Mostly sunny. .MONDAY NIGHT...E wind 5 to 10 kts. Waves 2 ft or less. Partly cloudy. $$ LMZ542-543-231600- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 323 AM CDT Sun Aug 23 2026 .EARLY THIS MORNING...NW wind 10 to 15 kts. Waves 2 ft or less. Clear. .TODAY...NW wind 10 to 20 kts. Waves 1 to 3 ft. Sunny in the morning then becoming partly cloudy. .TONIGHT...N wind 10 to 15 kts backing NW after midnight. Waves 1 to 3 ft. Clear. .MONDAY...NW wind 10 to 15 kts. Waves 2 ft or less. Mostly sunny. .MONDAY NIGHT...S wind 5 to 10 kts veering SW after midnight. Waves 2 ft or less. Partly cloudy. $$ LMZ541-231600- Rock Island Passage to Sturgeon Bay WI- 323 AM CDT Sun Aug 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING... .EARLY THIS MORNING...NW wind 15 to 25 kts. Waves 1 to 3 ft. Clear. .TODAY...N wind 15 to 25 kts. Waves 2 to 4 ft. A chance of sprinkles in the afternoon. .TONIGHT...NW wind 10 to 15 kts. Waves 1 to 3 ft. Clear. .MONDAY...NW wind 10 to 15 kts. Waves 2 ft or less. Mostly sunny. .MONDAY NIGHT...NE wind 5 to 10 kts. Waves 2 ft or less. Partly cloudy. $$ See Lake Michigan Open Lake Forecast for Tuesday through Thursday.