FZUS51 KBUF 181403 NSHBUF Nearshore Marine Forecast National Weather Service Buffalo NY 1003 AM EDT Mon May 18 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-LOZ030-182100- Upper Niagara River and Buffalo Harbor-Lower Niagara River- 1003 AM EDT Mon May 18 2026 .THIS AFTERNOON...Southwest winds 10 to 15 knots. Sunny. .TONIGHT...Southwest winds 5 to 10 knots. A chance of showers overnight. .TUESDAY...Southwest winds 10 to 15 knots increasing to 15 to 20 knots. Partly sunny in the morning, then becoming mostly sunny. .TUESDAY NIGHT...Southwest winds 10 to 15 knots becoming west. Showers with a chance of thunderstorms in the evening, then showers overnight. .WEDNESDAY...West winds 10 knots or less becoming north. Showers likely during the day. .THURSDAY...Northeast winds 10 knots or less becoming east. Partly cloudy. .FRIDAY...East winds 5 to 10 knots. A chance of showers Friday night. Winds and waves higher in and near thunderstorms. The water temperature off Buffalo is 52 degrees. $$ LEZ040-041-182100- Buffalo to Ripley along Lake Erie- 1003 AM EDT Mon May 18 2026 .THIS AFTERNOON...Southwest winds 5 to 10 knots. Sunny. Waves 1 foot or less. .TONIGHT...Southwest winds 5 to 10 knots. Mainly clear in the evening, then becoming mostly cloudy. Waves 1 foot or less. .TUESDAY...Southwest winds 5 to 15 knots. Partly to mostly sunny. Waves 2 feet or less. .TUESDAY NIGHT...Southwest winds 10 to 15 knots becoming west. Showers with a chance of thunderstorms in the evening, then showers overnight. Waves 1 to 3 feet. .WEDNESDAY...West winds 5 to 10 knots becoming north. Showers during the day. Waves 1 to 3 feet subsiding to 1 foot or less. .THURSDAY...Northeast winds 5 to 10 knots becoming east. Partly cloudy. Waves 1 foot or less. .FRIDAY...East winds 5 to 10 knots becoming southeast. A chance of showers during the day, then showers likely Friday night. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ042-182100- Niagara River to Hamlin Beach along Lake Ontario- 1003 AM EDT Mon May 18 2026 .THIS AFTERNOON...Southwest winds 10 to 15 knots increasing to 15 to 20 knots. Mostly sunny. Waves 1 to 3 feet. .TONIGHT...Southwest winds 15 to 20 knots diminishing to 10 to 15 knots. A chance of showers overnight. Waves 1 to 3 feet. .TUESDAY...Southwest winds 15 to 25 knots. A chance of showers in the morning. Waves 1 to 3 feet building to 2 to 4 feet. .TUESDAY NIGHT...Southwest winds 15 to 25 knots becoming west. Showers with a chance of thunderstorms in the evening, then showers overnight. Waves 3 to 5 feet subsiding to 2 to 4 feet. Waves occasionally around 6 feet. .WEDNESDAY...West winds 15 to 20 knots becoming northwest 10 to 15 knots. A chance of showers during the day. Waves 2 to 4 feet subsiding to 1 to 3 feet. .THURSDAY...Northeast winds 10 knots or less becoming east. Partly cloudy. Waves 2 feet or less. .FRIDAY...East winds 10 to 15 knots diminishing to 5 to 10 knots. A chance of showers Friday night. Waves 1 to 3 feet. Winds and waves higher in and near thunderstorms. $$ LOZ043-044-182100- Hamlin Beach to Mexico Bay along Lake Ontario including Irondequoit Bay- 1003 AM EDT Mon May 18 2026 .THIS AFTERNOON...Southwest winds 5 to 10 knots. Mostly sunny. Waves 1 foot or less. .TONIGHT...South winds 5 to 10 knots becoming southwest. A chance of showers. Waves 1 foot or less. .TUESDAY...Southwest winds 5 to 15 knots increasing to 15 to 20 knots. A chance of showers and thunderstorms in the afternoon. Waves 1 to 3 feet. .TUESDAY NIGHT...Southwest winds 15 to 20 knots becoming west. Showers with achance of thunderstorms. Waves 1 to 3 feet building to 2 to 4 feet. .WEDNESDAY...West winds 15 to 20 knots becoming northwest. Showers likely during the day. Waves 3 to 5 feet building to 4 to 7 feet, then subsiding to 3 to 5 feet. Waves occasionally around 9 feet. .THURSDAY...North winds 5 to 15 knots becoming east less than 10 knots. Partly cloudy. Waves 1 to 3 feet subsiding to 1 foot or less. .FRIDAY...East winds 5 to 15 knots becoming southeast. A chance of showers Friday night. Waves 2 feet or less. Winds and waves higher in and near thunderstorms. The water temperature off Rochester is 49 degrees. $$ LOZ045-182100- Mexico Bay to the Saint Lawrence River along Lake Ontario- 1003 AM EDT Mon May 18 2026 .THIS AFTERNOON...South winds 5 to 15 knots becoming southwest. Mostly sunny. Waves 2 feet or less. .TONIGHT...South winds 5 to 10 knots. A chance of showers and thunderstorms. Waves 2 feet or less. .TUESDAY...South winds 10 to 15 knots becoming southwest. A chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Waves 2 feet or less. .TUESDAY NIGHT...South winds 10 to 15 knots becoming southwest 15 to 20 knots. Showers with a chance of thunderstorms. Waves 1 to 3 feet building to 2 to 4 feet. .WEDNESDAY...West winds 15 to 20 knots becoming north 10 to 15 knots. Showers during the day. Waves 2 to 4 feet building to 3 to 6 feet. Waves occasionally around 7 feet. .THURSDAY...North winds 10 to 15 knots becoming light and variable. Mainly clear, then becoming partly cloudy. Waves 1 to 3 feet subsiding to 1 foot or less. .FRIDAY...East winds 10 knots or less becoming southeast. A chance of showers Friday night. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$