FZUS53 KGRB 131337 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 837 AM CDT Mon Apr 13 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-131600- 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- 837 AM CDT Mon Apr 13 2026 .TODAY...W wind 5 to 10 kts veering NE mid-day, then veering E 10 to 15 kts early in the afternoon. Waves 1 to 3 ft. Patchy fog in the morning. a slight chance of thunderstorms in the afternoon. .TONIGHT...E wind 10 to 15 kts backing NE 5 to 10 kts after midnight. Waves 2 ft or less. Patchy fog in the evening, then areas of fog after midnight. rain with thunderstorms likely in the evening, then showers and a chance of thunderstorms after midnight. .TUESDAY...N wind 5 to 10 kts veering E in the late morning and afternoon. Waves 2 ft or less. Areas of fog in the morning. . .TUESDAY NIGHT...NE wind 5 to 10 kts. Waves 2 ft or less. A chance of showers. $$ LMZ541-131600- Rock Island Passage to Sturgeon Bay WI- 837 AM CDT Mon Apr 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING... .TODAY...NW wind 10 to 15 kts veering NE 5 to 10 kts mid-day, then veering E early in the afternoon. Waves 4 to 7 ft subsiding to 2 to 4 ft in the afternoon. Patchy fog in the morning. .TONIGHT...E wind 10 to 15 kts. Waves 1 to 3 ft building to 2 to 4 ft after midnight. Patchy fog in the evening, then areas of fog after midnight. rain with thunderstorms likely in the evening, then showers and a chance of thunderstorms after midnight. .TUESDAY...NW wind 5 to 10 kts veering SE early in the afternoon. Waves 2 to 4 ft. Areas of fog in the morning. Patchy fog in the afternoon. . .TUESDAY NIGHT...NE wind 5 to 10 kts backing N after midnight. Waves 1 to 3 ft. A chance of showers. $$ LMZ542-543-131600- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 837 AM CDT Mon Apr 13 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING... .TODAY...W wind 10 to 15 kts backing E in the late morning and afternoon. Waves 2 to 4 ft subsiding to 1 to 3 ft in the afternoon. Patchy dense fog. a slight chance of light rain and thunderstorms in the afternoon. .TONIGHT...E wind 10 to 15 kts veering SW 5 to 10 kts after midnight. Waves 1 to 3 ft building to 2 to 4 ft after midnight. Patchy fog. rain with thunderstorms likely in the evening. A chance of thunderstorms and a slight chance of showers after midnight. .TUESDAY...W wind 5 to 10 kts backing SE early in the afternoon. Waves 2 to 4 ft subsiding to 1 to 3 ft in the afternoon. Areas of fog in the morning. a chance of showers in the afternoon. .TUESDAY NIGHT...N wind 5 to 10 kts. Waves 1 to 3 ft. Rain showers likely and a chance of thunderstorms in the evening, then a chance of showers after midnight. $$ See Lake Michigan Open Lake Forecast for Wednesday through Friday. Wave height forecast is for ice free areas.