FZUS53 KGRB 181717 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 1216 PM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-182200- 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- Green Bay south of line from Oconto WI to Little Sturgeon Bay WI- 1216 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY EVENING... .THIS AFTERNOON...S wind 5 to 10 kts backing SE early in the afternoon. Waves 1 to 3 ft. A chance of showers and thunderstorms. .TONIGHT...S wind 10 to 15 kts. Waves 1 to 3 ft. Patchy fog. a chance of showers and thunderstorms. .TUESDAY...SW wind 15 to 25 kts veering NW 10 to 15 kts early in the afternoon. Waves 2 to 4 ft. A chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 1 to 3 ft. Mostly cloudy in the evening then becoming partly cloudy. $$ LMZ541-182200- Rock Island Passage to Sturgeon Bay WI- 1216 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT... .THIS AFTERNOON...S wind 5 to 10 kts. Waves 3 to 5 ft. Patchy fog. a chance of showers and thunderstorms. .TONIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft building to 3 to 5 ft after midnight. Patchy dense fog in the evening. Areas of dense fog after midnight. a chance of showers in the evening. A chance of thunderstorms. Rain showers after midnight. .TUESDAY...SW wind 15 to 25 kts veering NW 10 to 20 kts early in the afternoon. Waves 4 to 7 ft. Patchy fog in the morning. a chance of showers. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight. Mostly cloudy in the evening then becoming partly cloudy. $$ LMZ542-543-182200- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 1216 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT... .THIS AFTERNOON...S wind 10 to 15 kts. Waves 3 to 5 ft. Patchy fog. a chance of showers and a slight chance of thunderstorms. .TONIGHT...S wind 10 to 15 kts. Waves 2 to 4 ft building to 3 to 5 ft after midnight. Patchy fog. a chance of showers and thunderstorms. .TUESDAY...SW wind 15 to 25 kts veering W early in the afternoon. Waves 4 to 7 ft. Patchy fog in the morning. a chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft. Mostly cloudy in the evening then becoming partly cloudy. $$ See Lake Michigan Open Lake Forecast for Wednesday through Friday. Wave height forecast is for ice free areas.