759 FZUS53 KDLH 190400 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1100 PM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Superior. 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. LSZ140-191000- Grand Portage to Grand Marais MN- 1100 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...Northeast wind 10 to 15 knots with gusts to around 25 knots. Chance of rain showers late in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 3 to 5 feet. .TUESDAY...North wind 10 to 15 knots with gusts to around 20 knots becoming northwest 5 to 10 knots with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. .WEDNESDAY...Northwest wind 5 knots becoming west late in the morning, then becoming southwest 10 to 15 knots with gusts to around 20 knots in the afternoon. Sunny. Waves 1 to 3 feet. $$ LSZ141-191000- Grand Marais to Taconite Harbor MN- 1100 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...Northeast wind 10 to 15 knots with gusts to around 25 knots becoming north 5 to 10 knots toward daybreak. Chance of rain showers late in the evening. Slight chance of thunderstorms late in the evening. Rain showers after midnight. Waves 1 to 3 feet. .TUESDAY...West wind 5 to 10 knots. Gusts up to 20 knots late in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 1 to 3 feet. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. .WEDNESDAY...Northwest wind 5 knots becoming south in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ142-191000- Taconite Harbor to Silver Bay Harbor MN- 1100 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots late in the evening. Rain showers likely late in the evening. Slight chance of thunderstorms late in the evening. Rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet after midnight. .TUESDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. .WEDNESDAY...Northwest wind 5 knots becoming south in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ143-191000- Silver Bay Harbor to Two Harbors MN- 1100 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots late in the evening. Slight chance of thunderstorms late in the evening. Rain showers through the night. Waves 1 to 2 feet building to 2 to 4 feet after midnight. .TUESDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. .WEDNESDAY...Northwest wind 5 knots becoming south in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ144-191000- Two Harbors to Duluth MN- 1100 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY... .REST OF TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots decreasing to 20 knots toward daybreak. Slight chance of thunderstorms late in the evening. Rain showers through the night. Waves 1 to 3 feet building to 2 to 4 feet after midnight. .TUESDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. .WEDNESDAY...West wind 5 knots becoming southeast in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ145-191000- Duluth MN to Port Wing WI- 1100 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM CDT TUESDAY... .REST OF TONIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots easing to 5 to 10 knots with gusts to around 20 knots toward daybreak. Slight chance of thunderstorms late in the evening. Rain showers through the night. Waves 1 to 3 feet. .TUESDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Waves 1 to 3 feet. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then clearing. Waves 1 to 2 feet. .WEDNESDAY...West wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ146-191000- Port Wing to Sand Island WI- 1100 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM CDT TUESDAY... .REST OF TONIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots easing to 10 to 15 knots with gusts to around 20 knots after midnight. Rain showers and slight chance of thunderstorms. Waves 1 to 2 feet building to 2 to 4 feet after midnight. .TUESDAY...West wind 5 to 10 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...West wind 5 knots early in the morning becoming variable 10 knots or less, then becoming southeast 5 knots late in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ147-191000- Sand Island to Bayfield WI- 1100 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM CDT TUESDAY... .REST OF TONIGHT...Northeast wind 15 to 20 knots with gusts to around 30 knots becoming north 10 to 15 knots with gusts to around 20 knots toward daybreak. Rain showers likely late in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 3 to 5 feet after midnight. .TUESDAY...West wind 10 to 15 knots. Gusts up to 20 knots in the afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...Northwest wind 5 knots early in the morning becoming variable 10 knots or less, then becoming southeast 5 knots in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ150-191000- Outer Apostle Islands Beyond 5 NM from Mainland- 1100 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...Northeast wind 20 to 25 knots with gales to around 35 knots becoming north 15 to 20 knots with gusts to around 25 knots toward daybreak. Rain showers likely late in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 2 to 4 feet building to 4 to 6 feet after midnight. Waves occasionally to 8 feet. .TUESDAY...Northwest wind 5 to 10 knots becoming west 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 3 to 5 feet subsiding to 1 to 3 feet late in the afternoon. Waves occasionally to 7 feet. .TUESDAY NIGHT...Northwest wind 10 to 15 knots easing to 5 to 10 knots in the late evening and overnight. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 3 feet. .WEDNESDAY...Northwest wind 5 knots becoming west late in the morning, then becoming southeast in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ121-191000- Chequamegon Bay-Bayfield to Oak Point WI- 1100 PM CDT Mon May 18 2026 .REST OF TONIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots becoming north 5 to 10 knots toward daybreak. Chance of thunderstorms late in the evening. Rain showers through the night. Slight chance of thunderstorms toward daybreak. Waves 1 to 2 feet. .TUESDAY...Northwest wind 5 knots becoming west 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 foot or less. .WEDNESDAY...Northwest wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. $$ LSZ148-191000- Oak Point to Saxon Harbor WI- 1100 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots becoming north 10 to 15 knots with gusts to around 20 knots toward daybreak. Rain showers likely late in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 2 to 4 feet building to 5 to 8 feet after midnight. Waves occasionally to 10 feet. .TUESDAY...Northwest wind 5 to 10 knots becoming west 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Chance of rain showers in the morning. Chance of sprinkles in the afternoon. Waves 2 to 4 feet. .TUESDAY NIGHT...Northwest wind 5 to 10 knots. Gusts up to 20 knots early in the evening. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 to 3 feet. .WEDNESDAY...Northwest wind 5 knots becoming east in the afternoon. Sunny. Waves 1 foot or less. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH  539 FZUS53 KGRB 190411 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 1111 PM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-191000- Green Bay south of line from Cedar River to Rock Island Passage and north of a line from Oconto WI to Little Sturgeon Bay WI- Green Bay south of line from Oconto WI to Little Sturgeon Bay WI- 1111 PM CDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT TUESDAY THROUGH TUESDAY EVENING... .REST OF TONIGHT...S wind 10 to 20 kts. Waves 2 ft or less. Patchy dense fog. a chance of showers and a slight chance of thunderstorms. .TUESDAY...SW wind 15 to 25 kts decreasing to 10 to 15 kts mid-day, then veering W early in the afternoon. Waves 1 to 3 ft. Patchy dense fog in the morning. a slight chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 ft or less. Mostly cloudy. .WEDNESDAY...N wind 10 to 15 kts veering E 5 to 10 kts early in the afternoon. Waves 2 ft or less. Mostly sunny. $$ LMZ541-191000- Rock Island Passage to Sturgeon Bay WI- 1111 PM CDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .REST OF TONIGHT...S wind 15 to 25 kts. Waves 2 to 4 ft building to 4 to 7 ft after midnight. Patchy dense fog. a chance of showers and a slight chance of thunderstorms. .TUESDAY...S wind 15 to 25 kts veering SW 10 to 15 kts mid-day, then veering NW early in the afternoon. Waves 4 to 7 ft. Patchy dense 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. .WEDNESDAY...N wind 10 to 15 kts veering E 5 to 10 kts early in the afternoon. Waves 2 ft or less. Mostly sunny. $$ LMZ542-543-191000- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 1111 PM CDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .REST OF TONIGHT...S wind 15 to 25 kts. Waves 4 to 7 ft. Patchy dense fog. a chance of showers and a slight chance of thunderstorms. .TUESDAY...SW wind 15 to 25 kts veering W early in the afternoon. Waves 4 to 7 ft. Patchy dense fog in the morning. a slight chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 1 to 3 ft. Mostly cloudy. .WEDNESDAY...N wind 10 to 15 kts veering NE in the late morning and afternoon. Waves 2 ft or less. Mostly sunny. $$ See Lake Michigan Open Lake Forecast for Thursday through Saturday. Wave height forecast is for ice free areas.  443 FZUS53 KMKX 190410 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 1110 PM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ643-191000- Sheboygan to Port Washington WI- 1110 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM CDT TUESDAY THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...South wind 15 to 20 knots becoming 15 to 25 knots early in the morning. Patchy fog through the night. scattered showers and thunderstorms after midnight. Rain showers likely and slight chance of thunderstorms early in the morning. Waves 3 to 4 feet. .TUESDAY...South wind 15 to 25 knots veering southwest 15 to 20 knots late in the morning, then veering west early in the afternoon becoming west 15 to 20 knots late in the afternoon. Patchy fog in the morning. slight chance of thunderstorms in the morning. Chance of showers through the day. Waves 3 to 4 feet. .TUESDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to 15 knots late in the evening, then becoming northwest 10 to 15 knots after midnight veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...North wind 10 to 15 knots veering northeast late in the afternoon. Mostly sunny. Waves 1 to 2 feet. $$ LMZ644-191000- Port Washington to North Point Light WI- 1110 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM CDT TUESDAY THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...South wind 15 to 20 knots becoming 15 to 25 knots early in the morning. Scattered showers and thunderstorms after midnight, then showers likely and slight chance of thunderstorms early in the morning. patchy fog early in the morning. Waves 2 to 4 feet. .TUESDAY...Southwest wind 15 to 25 knots easing to 10 to 20 knots late in the morning, then veering west 15 to 20 knots in the afternoon. Slight chance of thunderstorms in the morning. Chance of showers through the day. Waves 2 to 4 feet subsiding to 1 to 2 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 15 to 20 knots easing to 10 to 15 knots late in the evening, then rising to 15 to 20 knots after midnight becoming north 10 to 15 knots early in the morning. Partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...North wind 10 to 15 knots veering northeast late in the afternoon. Mostly sunny. Waves 1 to 2 feet building to 2 to 4 feet in the afternoon. $$ LMZ645-191000- North Point Light to Wind Point WI- 1110 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM CDT TUESDAY THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...South wind 15 to 20 knots becoming 15 to 25 knots early in the morning. Scattered showers and thunderstorms after midnight, then showers likely and slight chance of thunderstorms early in the morning. patchy fog early in the morning. Waves 2 to 4 feet. .TUESDAY...Southwest wind 15 to 25 knots easing to 10 to 20 knots late in the morning, then veering west 15 to 20 knots in the afternoon. Chance of showers and slight chance of thunderstorms through the day. Waves 2 to 4 feet subsiding to 1 to 2 feet late in the afternoon. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots becoming northwest 10 to 15 knots late in the evening, then rising to 15 to 20 knots after midnight veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...North wind 10 to 15 knots veering northeast late in the afternoon. Mostly sunny. Waves 2 to 4 feet. $$ LMZ646-191000- Wind Point WI to Winthrop Harbor IL- 1110 PM CDT Mon May 18 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM CDT TUESDAY THROUGH TUESDAY AFTERNOON... .REST OF TONIGHT...South wind 15 to 20 knots. Scattered showers and thunderstorms after midnight, then showers likely and slight chance of thunderstorms early in the morning. patchy fog early in the morning. Waves 2 to 4 feet. .TUESDAY...Southwest wind 15 to 20 knots becoming west 10 to 15 knots late in the afternoon. Gusts up to 25 knots. Chance of showers and slight chance of thunderstorms through the day. Waves 2 to 4 feet subsiding to 1 to 2 feet in the afternoon. .TUESDAY NIGHT...Northwest wind 10 to 15 knots with gusts to around 20 knots veering north early in the morning. Partly cloudy. Waves 1 to 2 feet. .WEDNESDAY...North wind 10 to 15 knots veering northeast late in the afternoon. Mostly sunny. Waves 2 to 4 feet. $$ See Lake Michigan Open Waters Forecast for Thursday through Saturday.  097 FZUS53 KGRB 190455 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 1155 PM CDT Mon May 18 2026 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-191000- 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- 1155 PM CDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM CDT TUESDAY THROUGH TUESDAY EVENING... .REST OF TONIGHT...S wind 10 to 20 kts. Waves 2 ft or less. Patchy dense fog. a chance of showers and a slight chance of thunderstorms. .TUESDAY...SW wind 15 to 25 kts decreasing to 10 to 15 kts mid-day, then veering W early in the afternoon. Waves 1 to 3 ft. Patchy dense fog in the morning. a slight chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 ft or less. Mostly cloudy. .WEDNESDAY...N wind 5 to 10 kts veering E early in the afternoon. Waves 2 ft or less. Partly cloudy in the morning then clearing. $$ LMZ541-191000- Rock Island Passage to Sturgeon Bay WI- 1155 PM CDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .REST OF TONIGHT...S wind 15 to 25 kts. Waves 2 to 4 ft building to 4 to 7 ft after midnight. Patchy dense fog. a chance of showers and a slight chance of thunderstorms. .TUESDAY...S wind 15 to 25 kts veering SW 10 to 15 kts mid-day, then veering NW early in the afternoon. Waves 4 to 7 ft. Patchy dense fog in the morning. a chance of showers. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight. Mostly cloudy. .WEDNESDAY...N wind 10 to 15 kts veering E 5 to 10 kts early in the afternoon. Waves 2 ft or less. Mostly sunny. $$ LMZ542-543-191000- Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI- 1155 PM CDT Mon May 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CDT TUESDAY... ...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY EVENING... .REST OF TONIGHT...S wind 15 to 25 kts. Waves 4 to 7 ft. Patchy dense fog. a chance of showers and a slight chance of thunderstorms. .TUESDAY...SW wind 15 to 25 kts veering W early in the afternoon. Waves 4 to 7 ft. Patchy dense fog in the morning. a slight chance of showers in the morning. .TUESDAY NIGHT...NW wind 10 to 15 kts. Waves 1 to 3 ft. Mostly cloudy. .WEDNESDAY...N wind 10 to 15 kts veering NE in the late morning and afternoon. Waves 2 ft or less. Partly cloudy in the morning then clearing. $$ See Lake Michigan Open Lake Forecast for Thursday through Saturday. Wave height forecast is for ice free areas.