FZUS53 KDLH 121631 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1131 AM CDT Sun Apr 12 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. LSZ140-122200- Grand Portage to Grand Marais MN- 1131 AM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TODAY...East wind 5 to 10 knots easing to 5 knots late. Patchy fog late in the morning. Chance of rain showers late in the morning. Chance of thunderstorms in the afternoon. Rain showers likely late. Waves 1 to 3 feet. .TONIGHT...South wind 5 to 10 knots becoming west in the late evening and overnight. Chance of showers and thunderstorms in the evening, then slight chance of rain showers after midnight. Waves 1 to 3 feet. .MONDAY...Northwest wind 5 to 10 knots becoming east in the afternoon. Partly sunny. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and overnight. Rain showers likely in the evening, then chance of rain showers after midnight. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ141-122200- Grand Marais to Taconite Harbor MN- 1131 AM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TODAY...Northeast wind 5 to 10 knots. Patchy fog late in the morning. Chance of rain showers late in the morning. Slight chance of thunderstorms early in the afternoon, then rain showers likely and chance of thunderstorms late. Waves 1 to 3 feet. .TONIGHT...Southwest wind 5 to 10 knots becoming west in the late evening and overnight. Chance of showers and thunderstorms in the evening. Waves 1 to 2 feet. .MONDAY...Northwest wind 5 knots becoming east in the afternoon. Partly sunny. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and early morning. Rain showers likely in the evening. Slight chance of thunderstorms through the night. Chance of rain showers after midnight. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ142-122200- Taconite Harbor to Silver Bay Harbor MN- 1131 AM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TODAY...Northeast wind 5 knots. Patchy fog late in the morning. Areas of dense fog early in the afternoon. Chance of rain showers late in the morning. Slight chance of thunderstorms early in the afternoon, then rain showers likely and chance of thunderstorms late. Waves 1 to 2 feet. .TONIGHT...Southwest wind 5 to 10 knots becoming west after midnight. Chance of showers and thunderstorms in the evening. Waves 1 to 2 feet. .MONDAY...West wind 5 knots becoming northwest late in the morning, then becoming northeast in the afternoon. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 5 to 10 knots. Gusts up to 20 knots in the late evening and early morning. Rain showers likely and slight chance of thunderstorms. Waves 1 to 2 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ143-122200- Silver Bay Harbor to Two Harbors MN- 1131 AM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TODAY...Northeast wind 5 to 10 knots. Patchy fog late in the morning. Chance of rain showers late in the morning, then rain showers likely and chance of thunderstorms late. Waves 1 to 2 feet. .TONIGHT...West wind 5 to 10 knots. Chance of showers and thunderstorms in the evening. Waves 1 foot or less. .MONDAY...West wind 5 knots becoming northeast in the afternoon. Chance of rain showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and early morning. Rain showers likely and slight chance of thunderstorms. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ144-122200- Two Harbors to Duluth MN- 1131 AM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TODAY...Northeast wind 5 to 10 knots. Patchy fog late in the morning. Slight chance of rain showers late in the morning. Chance of showers and thunderstorms in the afternoon. Waves 1 foot or less. .TONIGHT...Southwest wind 5 to 10 knots becoming west early in the morning. Chance of thunderstorms and slight chance of rain showers in the evening. Waves 1 foot or less. .MONDAY...Northwest wind 5 knots becoming north late in the morning, then becoming northeast 10 to 15 knots in the afternoon. Chance of rain showers and slight chance of thunderstorms in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots until early morning. Chance of thunderstorms in the evening. Rain showers likely through the night. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ145-122200- Duluth MN to Port Wing WI- 1131 AM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TODAY...East wind 5 to 10 knots. Patchy fog late in the morning. Slight chance of rain showers late in the morning. Chance of showers and thunderstorms in the afternoon. Waves 1 foot or less. .TONIGHT...Southwest wind 5 to 10 knots becoming west early in the morning. Slight chance of showers and thunderstorms in the evening. Waves 1 foot or less. .MONDAY...Northwest wind 5 knots becoming north late in the morning, then becoming northeast 10 to 15 knots in the afternoon. Chance of rain showers and slight chance of thunderstorms in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots until early morning. Chance of thunderstorms in the evening. Rain showers likely through the night. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ146-122200- Port Wing to Sand Island WI- 1131 AM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TODAY...East wind 5 to 10 knots. Slight chance of showers and thunderstorms late in the morning, then chance of showers and thunderstorms in the afternoon. Patchy fog early in the afternoon. Waves 1 foot or less. .TONIGHT...Southwest wind 5 to 10 knots becoming west early in the morning. Chance of showers and thunderstorms in the evening. Waves 1 foot or less. .MONDAY...West wind 5 knots becoming northeast in the afternoon. Chance of rain showers and slight chance of thunderstorms in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and early morning. Chance of thunderstorms in the evening. Rain showers likely through the night. Slight chance of thunderstorms after midnight. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ147-122200- Sand Island to Bayfield WI- 1131 AM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TODAY...Southeast wind 10 to 15 knots. Gusts up to 20 knots in the afternoon. Patchy fog late in the morning. Slight chance of showers and thunderstorms late in the morning. Chance of showers and thunderstorms in the afternoon. Waves 1 foot or less. .TONIGHT...West wind 5 to 10 knots. Chance of showers and thunderstorms in the evening. Waves 1 to 2 feet. .MONDAY...Northwest wind 5 to 10 knots becoming northeast in the afternoon. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 knots rising to 10 to 15 knots with gusts to around 20 knots in the late evening and overnight. Chance of thunderstorms and slight chance of rain showers in the evening, then chance of rain showers and slight chance of thunderstorms after midnight. Waves 1 to 2 feet building to 1 to 3 feet after midnight. Note...Wave height forecasts are for ice free areas. $$ LSZ150-122200- Outer Apostle Islands Beyond 5 NM from Mainland- 1131 AM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TODAY...Southeast wind 10 knots becoming south in the afternoon. Gusts up to 20 knots. Patchy fog late in the morning. Slight chance of showers and thunderstorms late in the morning. Chance of showers and thunderstorms in the afternoon. Waves 1 to 3 feet. .TONIGHT...West wind 10 to 15 knots easing to 10 knots early in the morning. Chance of showers and thunderstorms in the evening. Waves 1 to 2 feet. .MONDAY...Northwest wind 5 to 10 knots becoming northeast in the afternoon. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 15 to 20 knots. Slight chance of rain showers in the evening. Slight chance of thunderstorms through the night. Chance of rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet in the late evening and overnight. Note...Wave height forecasts are for ice free areas. $$ LSZ148-122200- Oak Point to Saxon Harbor WI- 1131 AM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TODAY...South wind 10 knots becoming southwest in the afternoon. Gusts up to 25 knots. Slight chance of showers and thunderstorms early in the afternoon. Chance of showers and thunderstorms late. Waves 1 to 2 feet. .TONIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 to 10 knots after midnight. Chance of showers and thunderstorms in the evening. Waves 1 to 2 feet. .MONDAY...North wind 5 knots becoming northeast in the afternoon. Chance of rain showers and slight chance of thunderstorms in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Chance of thunderstorms in the evening. Rain showers through the night. Slight chance of thunderstorms after midnight. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH