860 FZUS51 KBUF 202004 NSHBUF Nearshore Marine Forecast National Weather Service Buffalo NY 404 PM 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-LOZ030-210300- Upper Niagara River and Buffalo Harbor-Lower Niagara River- 404 PM EDT Wed May 20 2026 .TONIGHT...Northwest winds 5 to 10 knots becoming northeast. Mostly cloudy. .THURSDAY...Northeast winds 5 to 10 knots. Mostly sunny. .THURSDAY NIGHT...Northeast winds 10 knots or less becoming east. Becoming mainly clear. .FRIDAY...East winds 5 to 15 knots becoming northeast. Mostly sunny in the morning, then becoming partly sunny. .FRIDAY NIGHT...East winds 5 to 15 knots. Showers likely overnight. .SATURDAY...East winds 5 to 15 knots becoming southeast. Showers with a chance of thunderstorms. .SUNDAY...South winds 10 knots or less. A chance of showers. .MONDAY...Southwest winds less than 10 knots. A chance of showers during the day. Winds and waves higher in and near thunderstorms. The water temperature off Buffalo is 55 degrees. $$ LEZ040-041-210300- Buffalo to Ripley along Lake Erie- 404 PM EDT Wed May 20 2026 .TONIGHT...Southwest winds 10 to 15 knots becoming northeast 15 to 20 knots. Mostly cloudy. Waves 2 feet or less. .THURSDAY...Northeast winds 10 to 15 knots. Mostly sunny. Waves 2 feet or less. .THURSDAY NIGHT...Northeast winds 5 to 10 knots becoming east. Becoming mainly clear. Waves 2 feet or less. .FRIDAY...East winds 5 to 10 knots becoming northeast. Mostly sunny in the morning, then becoming partly sunny. Waves 2 feet or less. .FRIDAY NIGHT...East winds 5 to 15 knots. A chance of showers in the evening, then showers overnight. Waves 2 feet or less. .SATURDAY...East winds 15 to 20 knots becoming south. Showers with a chance of thunderstorms. Waves 1 to 3 feet. .SUNDAY...South winds 10 knots or less. A chance of showers. Waves 1 foot or less. .MONDAY...Southwest winds less than 10 knots. A chance of showers during the day. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ042-210300- Niagara River to Hamlin Beach along Lake Ontario- 404 PM EDT Wed May 20 2026 .TONIGHT...Northwest winds 5 to 15 knots becoming northeast 15 to 20 knots. Mostly cloudy. Waves 1 to 3 feet. .THURSDAY...Northeast winds 15 to 20 knots becoming east 5 to 15 knots. Mostly sunny. Waves 1 to 3 feet. .THURSDAY NIGHT...East winds 10 knots or less. Becoming mainly clear. Waves 1 foot or less. .FRIDAY...East winds 5 to 10 knots increasing to 15 to 20 knots. Mostly sunny in the morning, then becoming partly sunny. Waves 1 foot or less building to 2 to 4 feet. .FRIDAY NIGHT...East winds 15 to 20 knots diminishing to 10 to 15 knots. Showers likely overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet. .SATURDAY...East winds 15 to 25 knots becoming southeast. Showers. 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. .MONDAY...Southwest winds 10 knots or less becoming west. A chance of showers during the day. Waves 1 foot or less. $$ LOZ043-044-210300- Hamlin Beach to Mexico Bay along Lake Ontario including Irondequoit Bay- 404 PM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... .TONIGHT...West winds 15 to 25 knots becoming northeast. Mostly cloudy. Waves 3 to 6 feet. Waves occasionally around 7 feet. .THURSDAY...Northeast winds 15 to 20 knots becoming north 5 to 15 knots. Mostly sunny. Waves 3 to 6 feet subsiding to1 to 3 feet. Waves occasionally around 7 feet. .THURSDAY NIGHT...North winds 10 knots or less becoming east. Becoming mainly clear. Waves 1 foot or less. .FRIDAY...East winds 5 to 15 knots becoming northeast. Partly to mostly sunny. Waves 2 feet or less. .FRIDAY NIGHT...Northeast winds 10 to 15 knots becoming east. A chance of showers overnight. Waves 1 to 3 feet. .SATURDAY...Southeast winds 15 to 25 knots. Showers. Waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet. Waves occasionally around 6 feet. .SUNDAY...Southeast winds 15 to 25 knots becoming south and diminishing to 10 to 15 knots. Showers during the day, then showers likely Sunday night. Waves 2 to 4 feet subsiding to 1 foot or less. .MONDAY...South winds 10 knots or less becoming west. Showers likely during the day. Waves 1 foot or less. The water temperature off Rochester is 53 degrees. $$ LOZ045-210300- Mexico Bay to the Saint Lawrence River along Lake Ontario- 404 PM EDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... .TONIGHT...West winds 15 to 20 knots becoming northeast. Mostly cloudy. Waves 3 to 5 feet subsiding to 2 to 4 feet. Waves occasionally around 6 feet. .THURSDAY...Northeast winds 15 to 20 knots becoming north 5 to 15 knots. Mostly sunny. Waves 1 to 3 feet subsiding to 1 foot or less. .THURSDAY NIGHT...Northwest winds 10 knots or less becoming east. Becoming mainly clear. Waves 1 foot or less. .FRIDAY...East winds less than 10 knots becoming north. Mostly sunny. Waves 1 foot or less. .FRIDAY NIGHT...Northeast winds 5 to 10 knots becoming east. Mostly cloudy. Waves 1 foot or less. .SATURDAY...East winds 10 to 15 knots becoming southeast and increasing to 15 to 25 knots. Showers. Waves 1 to 3 feet building to 3 to 5 feet. Waves occasionally around 6 feet. .SUNDAY...Southeast winds 15 to 25 knots becoming south and diminishing to 10 to 15 knots. Showers. Waves 3 to 5 feet subsiding to 1 to 3 feet. Waves occasionally around 6 feet. .MONDAY...South winds 10 knots or less becoming southwest. Showers likely during the day. Waves 2 feet or less. $$  435 FZUS53 KMKX 202011 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 311 PM CDT Wed May 20 2026 For waters within five nautical miles of shore on Lake Michigan LMZ643-210900- Sheboygan to Port Washington WI- 311 PM CDT Wed May 20 2026 .THROUGH EARLY EVENING...Northeast wind 10 to 15 knots. Sunny. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. .TONIGHT...Northeast wind 10 to 15 knots rising to 15 to 20 knots after midnight, then easing to 10 to 15 knots early in the morning. Partly cloudy. Waves 2 to 4 feet. .THURSDAY...Northeast wind 15 to 20 knots easing to 10 to 15 knots late in the morning, then becoming northeast 10 to 15 knots in the afternoon. Mostly sunny in the morning then becoming mostly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .THURSDAY NIGHT...Northeast wind 10 to 15 knots becoming east 15 to 20 knots after midnight, then easing to 10 to 15 knots early in the morning. Mostly cloudy. Waves 3 to 4 feet. .FRIDAY...East wind 10 to 15 knots backing northeast late in the morning, then rising to 15 to 20 knots early in the afternoon becoming northeast 15 to 20 knots late in the afternoon. Partly sunny. Waves 3 to 4 feet. $$ LMZ644-210900- Port Washington to North Point Light WI- 311 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY EVENING... .THROUGH EARLY EVENING...Northeast wind 10 to 15 knots. Sunny. Waves 1 to 3 feet building to 2 to 4 feet late 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. Mostly sunny in the morning then becoming mostly cloudy. Waves 3 to 4 feet. .THURSDAY NIGHT...Northeast wind 15 to 20 knots veering east after midnight, then becoming 10 to 20 knots early in the morning. Partly cloudy through around midnight then becoming mostly cloudy. Waves 3 to 4 feet. .FRIDAY...East wind 10 to 20 knots becoming 15 to 20 knots late in the morning, then backing northeast early in the afternoon becoming northeast 15 to 20 knots late in the afternoon. Partly sunny. Waves 3 to 4 feet. $$ LMZ645-210900- North Point Light to Wind Point WI- 311 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .THROUGH EARLY EVENING...Northeast wind 5 to 15 knots rising to 15 to 20 knots late in the afternoon. Sunny. Waves 2 to 4 feet. .TONIGHT...Northeast wind 15 to 20 knots becoming 10 to 20 knots early in the morning. Partly cloudy. Waves 3 to 4 feet. .THURSDAY...Northeast wind 15 to 20 knots easing to 10 to 15 knots early in the afternoon, then becoming northeast 10 to 15 knots late in the afternoon. Mostly sunny in the morning then becoming mostly cloudy. Waves 3 to 4 feet. .THURSDAY NIGHT...Northeast wind 15 to 20 knots veering east 10 to 20 knots after midnight, then becoming 15 to 20 knots early in the morning. Partly cloudy. Waves 3 to 4 feet. .FRIDAY...East wind 15 to 20 knots backing northeast late in the afternoon. Partly sunny. Waves 3 to 5 feet. $$ LMZ646-210900- Wind Point WI to Winthrop Harbor IL- 311 PM CDT Wed May 20 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY EVENING... .THROUGH EARLY EVENING...Northeast wind 10 to 15 knots rising to 15 to 20 knots late in the afternoon. Sunny. Waves 2 to 4 feet. .TONIGHT...Northeast wind 15 to 20 knots becoming 10 to 20 knots early in the morning. 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 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...North wind 15 to 20 knots veering east after midnight. Partly cloudy. Waves 3 to 4 feet. .FRIDAY...East wind 15 to 20 knots backing northeast late in the afternoon. Slight chance of showers in the afternoon. Waves 3 to 4 feet. $$ See Lake Michigan Open Waters Forecast for Saturday through Monday.