800 FZUS51 KBUF 200803 NSHBUF Nearshore Marine Forecast National Weather Service Buffalo NY 403 AM EDT Wed May 20 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-LOZ030-201500- Upper Niagara River and Buffalo Harbor-Lower Niagara River- 403 AM EDT Wed May 20 2026 .TODAY...Northwest winds 5 to 10 knots. A chance of showers early. .TONIGHT...North winds less than 10 knots. Mostly cloudy. .THURSDAY...Northeast winds 5 to 10 knots. Mostly sunny. .THURSDAY NIGHT...Northeast winds 10 knots or less becoming east. Partly to mostly cloudy. .FRIDAY...East winds 5 to 10 knots. Showers likely Friday night. .SATURDAY...East winds 5 to 15 knots becoming southeast. Showers. .SUNDAY...South winds 5 to 10 knots becoming light and variable. A chance of showers. The water temperature off Buffalo is 55 degrees. $$ LEZ040-041-201500- Buffalo to Ripley along Lake Erie- 403 AM EDT Wed May 20 2026 .TODAY...Northwest winds 10 knots or less becoming west. A chance of showers early. Waves 1 to 3 feet. .TONIGHT...West winds 10 knots or less becoming northeast. Mostly cloudy. Waves 1 foot or less. .THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves 1 to 3 feet. .THURSDAY NIGHT...Northeast winds 5 to 15 knots becoming east. Partly to mostly cloudy. Waves 2 feet or less. .FRIDAY...East winds 5 to 15 knots. A chance of showers during the day, then showers Friday night. Waves 2 feet or less. .SATURDAY...Southeast winds 15 to 20 knots diminishing to 10 to 15 knots. Showers with a chance of thunderstorms. Waves 2 feet or less. .SUNDAY...South winds 10 knots or less. A chance of showers during the day, then showers likely Sunday night. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ042-201500- Niagara River to Hamlin Beach along Lake Ontario- 403 AM EDT Wed May 20 2026 .TODAY...West winds 15 to 20 knots becoming northwest 10 to 15 knots. Partly to mostly sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TONIGHT...Northwest winds 5 to 15 knots becoming northeast. Mostly cloudy. Waves 1 to 3 feet. .THURSDAY...Northeast winds 5 to 15 knots becoming east. Mostly sunny. Waves 1 to 2 feet. .THURSDAY NIGHT...East winds less than 10 knots. Partly cloudy. Waves 1 foot or less. .FRIDAY...East winds 15 to 20 knots. Showers likely Friday night. Waves 1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SATURDAY...East winds 15 to 25 knots becoming southeast. Showers during the day, then showers likely Saturday night. Waves 3 to 6 feet subsiding to 2 to 4 feet. Waves occasionally around 7 feet. .SUNDAY...Southeast winds 5 to 15 knots becoming south. Showers likely during the day, then a chance of showers Sunday night. Waves 1 to 3 feet subsiding to 1 foot or less. $$ LOZ043-044-201500- Hamlin Beach to Mexico Bay along Lake Ontario including Irondequoit Bay- 403 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH THIS EVENING... .TODAY...West winds 15 to 20 knots. Mostly cloudy this morning, then becoming mostly sunny. Waves 2 to 4 feet building to 3 to 6 feet. Waves occasionally around 7 feet. .TONIGHT...West winds 15 to 20 knots becoming northeast 10 to 15 knots. Mostly cloudy. Waves 3 to 6 feet subsiding to 2 to 4 feet. Waves occasionally around 7 feet. .THURSDAY...Northeast winds 5 to 15 knots becoming north. Mostly sunny. Waves 1 to 3 feet. .THURSDAY NIGHT...Northwest winds less than 10 knots. Partly cloudy. Waves 1 foot or less. .FRIDAY...East winds 5 to 15 knots. A chance of showers Friday night. Waves 1 to 3 feet. .SATURDAY...Southeast winds 15 to 25 knots. Showers. Waves 3 to 6 feet subsiding to 2 to 4 feet. Waves occasionally around 7 feet. .SUNDAY...Southeast winds 15 to 20 knots diminishing to 10 to 15 knots. Showers likely. Waves 2 to 4 feet subsiding to 1 to 3 feet. The water temperature off Rochester is 50 degrees. $$ LOZ045-201500- Mexico Bay to the Saint Lawrence River along Lake Ontario- 403 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH THIS EVENING... .TODAY...West winds 10 to 15 knots increasing to 15 to 20 knots. Mostly cloudy this morning, then becoming mostly sunny. Waves 2 to 4 feet building to 3 to 6 feet. Waves occasionally around 7 feet. .TONIGHT...West winds 15 to 20 knots becoming north. Partly to mostly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet. Waves occasionally around 6 feet. .THURSDAY...Northeast winds 15 to 20 knots becoming north 5 to 15 knots. Mostly sunny. Waves 2 feet or less. .THURSDAY NIGHT...Northwest winds less than 10 knots becoming east. Mainly clear in the evening, then becoming partly cloudy. Waves 1 foot or less. .FRIDAY...East winds 10 knots or less. A chance of showers Friday night. Waves 1 foot or less. .SATURDAY...East winds 10 to 15 knots becoming southeast and increasing to 15 to 25 knots. Showers likely. Waves 1 to 3 feet building to 2 to 4 feet. .SUNDAY...Southeast winds 15 to 25 knots becoming south. Showers likely. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$  120 FZUS53 KIWX 200809 NSHIWX Nearshore Marine Forecast National Weather Service Northern Indiana 409 AM EDT Wed May 20 2026 For waters within five nautical miles of shore on Lake Michigan LMZ046-201415- Michigan City IN to New Buffalo MI- 409 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH LATE TONIGHT... .TODAY...North winds 10 to 15 knots increasing to 15 to 20 knots. Gusts up to 25 knots. Partly sunny. Waves 3 to 5 feet. .TONIGHT...North winds 15 to 20 knots becoming northeast 10 to 15 knots. Gusts up to 25 knots. Mostly cloudy in the evening, then clearing. Waves 3 to 5 feet. .THURSDAY...East winds 10 to 15 knots becoming north. Mostly sunny. Waves 1 to 3 feet. .THURSDAY NIGHT...Northeast winds 5 to 15 knots becoming east. Partly cloudy in the evening, then becoming mostly cloudy. Waves 1 to 3 feet. The water temperature at St. Joseph and at Michigan City is 55 degrees. $$ LMZ043-201415- New Buffalo MI to St Joseph MI- 409 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH LATE TONIGHT... .TODAY...North winds 10 to 15 knots increasing to 15 to 20 knots. Gusts up to 25 knots. Partly sunny. Waves 3 to 5 feet. .TONIGHT...North winds 15 to 20 knots becoming northeast 10 to 15 knots. Gusts up to 25 knots. Mostly cloudy in the evening, then clearing. Waves 3 to 5 feet subsiding to 2 to 4 feet. .THURSDAY...East winds 10 to 15 knots becoming northeast. Mostly sunny. Waves 1 to 3 feet. .THURSDAY NIGHT...Northeast winds 10 to 15 knots becoming east. Partly cloudy in the evening, then becoming mostly cloudy. Waves 1 to 2 feet. The water temperature at St. Joseph and at Michigan City is 55 degrees. $$ Andersen  498 FZUS53 KMKX 200810 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 310 AM CDT Wed May 20 2026 For waters within five nautical miles of shore on Lake Michigan LMZ643-202100- Sheboygan to Port Washington WI- 310 AM CDT Wed May 20 2026 .EARLY THIS MORNING...Northwest wind 10 to 15 knots. Partly cloudy. Waves 1 to 2 feet. .TODAY...North wind 10 to 15 knots veering northeast late in the afternoon. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. .TONIGHT...Northeast wind 10 to 15 knots. Partly cloudy. Waves 2 to 4 feet. .THURSDAY...Northeast wind 10 to 15 knots. Partly sunny. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .THURSDAY NIGHT...Northeast wind 15 to 20 knots easing to 10 to 15 knots late in the evening, then becoming east 15 to 20 knots after midnight easing to 10 to 15 knots early in the morning. Mostly cloudy. Waves 2 to 4 feet. $$ LMZ644-202100- Port Washington to North Point Light WI- 310 AM CDT Wed May 20 2026 .EARLY THIS MORNING...Northwest wind 10 to 15 knots. Partly cloudy. Waves 1 to 2 feet. .TODAY...North wind 10 to 15 knots veering northeast late in the morning, then rising to 15 to 20 knots in the afternoon. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. .TONIGHT...Northeast wind 10 to 15 knots rising to 15 to 20 knots late in the evening, then becoming northeast 15 to 20 knots after midnight. Partly cloudy. Waves 3 to 4 feet. .THURSDAY...Northeast wind 15 to 20 knots easing to 10 to 15 knots late in the morning, then becoming northeast 10 to 15 knots in the afternoon. Partly sunny. Waves 3 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .THURSDAY NIGHT...Northeast wind 15 to 20 knots veering east early in the morning. Mostly cloudy. Waves 3 to 4 feet. $$ LMZ645-202100- North Point Light to Wind Point WI- 310 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING... .EARLY THIS MORNING...Northwest wind 10 to 15 knots veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. .TODAY...North wind 10 to 15 knots becoming northeast 15 to 20 knots in the late morning and afternoon. Mostly sunny. Waves 1 to 2 feet building to 3 to 4 feet in the late morning and afternoon. .TONIGHT...Northeast wind 15 to 20 knots becoming 10 to 20 knots after midnight, then becoming 15 to 20 knots early in the morning. Partly cloudy. Waves 3 to 4 feet building to 4 to 6 feet in the late evening and overnight. .THURSDAY...Northeast wind 15 to 20 knots easing to 10 to 15 knots late in the morning, then becoming northeast 10 to 15 knots in the afternoon. Partly sunny. Waves 3 to 4 feet. .THURSDAY NIGHT...Northeast wind 15 to 20 knots veering east 10 to 20 knots after midnight. Mostly cloudy. Waves 3 to 4 feet. $$ LMZ646-202100- Wind Point WI to Winthrop Harbor IL- 310 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH THURSDAY MORNING... .EARLY THIS MORNING...Northwest wind 10 to 15 knots veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. .TODAY...North wind 10 to 15 knots rising to 15 to 20 knots late in the morning, then veering northeast in the afternoon. Partly sunny. Waves 1 to 2 feet building to 3 to 4 feet in the late morning and afternoon. .TONIGHT...North wind 15 to 20 knots veering northeast early in the morning. Partly cloudy. Waves 3 to 4 feet building to 4 to 6 feet in the late evening and overnight. .THURSDAY...Northeast wind 15 to 20 knots becoming east 10 to 15 knots late in the morning, then backing northeast early in the afternoon becoming northeast 10 to 15 knots with gusts to around 20 knots late in the afternoon. Partly sunny. Waves 3 to 4 feet. .THURSDAY NIGHT...Northeast wind 15 to 20 knots veering east after midnight. Mostly cloudy. Waves 3 to 4 feet. $$ See Lake Michigan Open Waters Forecast for Friday through Sunday.  365 FZUS53 KGRR 200828 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 428 AM EDT Wed May 20 2026 For waters within five nautical miles of shore on Lake Michigan LMZ849-200930- Pentwater to Manistee MI- 428 AM EDT Wed May 20 2026 .REST OF TONIGHT...North winds 10 to 15 knots. Mostly cloudy. Waves 1 to 3 feet. .WEDNESDAY...North winds 15 to 25 knots. Sunny. Waves 2 to 4 feet. .WEDNESDAY NIGHT...Northeast winds 10 to 20 knots. Mostly clear. Waves 2 to 3 feet. .THURSDAY...Northeast winds 5 to 15 knots backing north 10 to 20 knots early in the afternoon. Mostly sunny. Waves 1 to 2 feet. .THURSDAY NIGHT...North winds 10 to 15 knots veering east in the late evening and overnight. Partly cloudy. Waves 1 to 2 feet. .FRIDAY...East winds 10 to 20 knots. Mostly cloudy. Waves 1 to 2 feet. .SATURDAY...Northeast winds 10 to 20 knots. Mostly cloudy with a chance of rain showers. Waves 1 to 2 feet. .SUNDAY...Southwest winds 5 to 10 knots. Mostly cloudy. Waves 1 foot or less. $$ LMZ848-200930- Whitehall to Pentwater MI- 428 AM EDT Wed May 20 2026 .REST OF TONIGHT...North winds around 15 knots. Mostly cloudy. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 25 knots. Mostly sunny. Waves 2 to 4 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots veering northeast 10 to 20 knots after midnight. Partly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight. .THURSDAY...Northeast winds 10 to 20 knots backing north early in the afternoon. Mostly sunny. Waves 1 to 2 feet. .THURSDAY NIGHT...Northeast winds 10 to 20 knots veering east in the late evening and overnight. Mostly cloudy. Waves 1 to 2 feet. .FRIDAY...East winds 15 to 25 knots. Mostly cloudy. Waves 1 to 2 feet. .SATURDAY...East winds 15 to 20 knots backing north early in the afternoon. Mostly cloudy with a chance of rain showers. Waves 1 to 2 feet. .SUNDAY...South winds 5 to 10 knots veering southwest early in the afternoon. Mostly cloudy. Waves 1 foot or less. $$ LMZ847-200930- Grand Haven to Whitehall MI- 428 AM EDT Wed May 20 2026 .REST OF TONIGHT...North winds 15 to 20 knots. Partly cloudy. Waves 2 to 4 feet. .WEDNESDAY...North winds to 30 knots. Mostly sunny. Waves 3 to 5 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots veering northeast 10 to 20 knots in the late evening and overnight. Partly cloudy. Waves 3 to 5 feet subsiding to 1 to 3 feet in the late evening and overnight. .THURSDAY...East winds 10 to 15 knots backing north early in the afternoon. Mostly sunny. Waves around 1 foot. .THURSDAY NIGHT...East winds 15 to 20 knots. Mostly cloudy. Waves 1 to 2 feet. .FRIDAY...East winds 15 to 25 knots. Mostly cloudy. Waves 1 to 3 feet. .SATURDAY...East winds 15 to 25 knots veering west around 15 knots early in the afternoon. Mostly cloudy with a chance of rain showers. Waves 1 to 2 feet. .SUNDAY...South winds 5 to 10 knots veering southwest in the late morning and afternoon. Mostly cloudy. Waves less than 1 foot. $$ LMZ846-200930- Holland to Grand Haven MI- 428 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .REST OF TONIGHT...North winds 15 to 20 knots. Partly cloudy. Waves 2 to 4 feet. .WEDNESDAY...North winds to 30 knots. Partly sunny. Waves 2 to 4 feet. .WEDNESDAY NIGHT...North winds to 30 knots veering northeast 15 to 20 knots in the late evening and overnight. Partly cloudy. Waves 3 to 5 feet subsiding to 1 to 2 feet after midnight. .THURSDAY...East winds 10 to 15 knots. Mostly sunny. Waves around 1 foot. .THURSDAY NIGHT...East winds 15 to 20 knots. Mostly cloudy. Waves 1 to 2 feet. .FRIDAY...East winds 15 to 25 knots. Mostly cloudy. Waves 1 to 3 feet. .SATURDAY...East winds 15 to 25 knots veering west 10 to 15 knots early in the afternoon. Mostly cloudy with rain showers. Waves 1 to 3 feet. .SUNDAY...South winds 5 to 10 knots veering west early in the afternoon. Mostly cloudy. Waves less than 1 foot. $$ LMZ845-200930- South Haven to Holland MI- 428 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .REST OF TONIGHT...North winds around 20 knots. Partly cloudy. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 25 knots. Partly sunny. Waves 4 to 6 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots veering northeast in the late evening and overnight. Mostly clear. Waves 4 to 6 feet subsiding to 2 to 3 feet after midnight. .THURSDAY...Northeast winds 10 to 20 knots. Mostly sunny. Waves around 1 foot. .THURSDAY NIGHT...East winds 15 to 20 knots. Mostly cloudy. Waves around 1 foot. .FRIDAY...East winds 15 to 20 knots. Mostly cloudy. Waves 1 to 2 feet. .SATURDAY...East winds 15 to 20 knots backing west 10 to 15 knots early in the afternoon. Mostly cloudy with rain showers and a chance of thunderstorms. Waves around 1 foot. .SUNDAY...Southeast winds 5 to 10 knots veering west early in the afternoon. Mostly cloudy. Waves 1 foot or less. $$ LMZ844-200930- St Joseph to South Haven MI- 428 AM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .REST OF TONIGHT...North winds 15 to 20 knots. Partly cloudy. Waves 2 to 4 feet. .WEDNESDAY...North winds 15 to 25 knots. Partly sunny. Waves 4 to 6 feet. .WEDNESDAY NIGHT...North winds 15 to 25 knots veering northeast after midnight. Partly cloudy. Waves 4 to 6 feet. .THURSDAY...East winds 10 to 20 knots backing northeast early in the afternoon. Mostly sunny. Waves 1 to 3 feet. .THURSDAY NIGHT...Northeast winds 10 to 15 knots. Partly cloudy. Waves 1 to 2 feet. .FRIDAY...East winds 15 to 20 knots. Mostly cloudy. Waves 1 to 2 feet. .SATURDAY...East winds around 15 knots backing northwest in the late morning and afternoon. Mostly cloudy. Waves around 1 foot. .SUNDAY...Southeast winds around 5 knots veering southwest in the late morning and early afternoon, then veering northwest early in the afternoon. Mostly cloudy. Waves 1 foot or less. $$  394 FZUS53 KLOT 200829 NSHLOT Nearshore Marine Forecast National Weather Service Chicago/Romeoville IL 329 AM CDT Wed May 20 2026 For waters within five nautical miles of shore on Lake Michigan Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the waves, along with the average height of the highest 10 percent of the waves which will occasionally be encountered. LMZ740>742-201515- Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 329 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT THIS MORNING THROUGH THURSDAY AFTERNOON... .TODAY...North winds 15 to 20 kt becoming northeast at 15 to 25 kt this morning. Mostly cloudy in the morning, then becoming partly cloudy. Waves 2 to 4 ft building to 3 to 6 ft occasionally to 8 ft. .TONIGHT...Northeast winds 15 to 25 kt diminishing to 15 to 20 kt this evening. Partly cloudy. Waves 4 to 6 ft occasionally to 8 ft. .THURSDAY...Northeast winds 15 to 20 kt. Partly cloudy in the morning, then becoming mostly cloudy. Waves 3 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. .THURSDAY NIGHT...Northeast winds 15 to 20 kt becoming east overnight. Mostly cloudy. Waves 2 to 4 ft. $$ LMZ743>745-201515- Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 329 AM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH THURSDAY MORNING... .TODAY...North winds 20 to 25 kt. Mostly cloudy. Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft. .TONIGHT...North winds 15 to 25 kt becoming northeast 15 to 20 kt overnight. Partly cloudy. Waves 4 to 6 ft occasionally to 8 ft. .THURSDAY...East winds 15 to 20 kt becoming north in the afternoon. Partly cloudy. Waves 3 to 5 ft subsiding to 2 to 4 ft. .THURSDAY NIGHT...Northeast winds 15 to 20 kt becoming east overnight. Mostly cloudy. Waves 2 to 4 ft. $$ Ratzer