FZUS53 KDLH 122309 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 609 PM 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. LSZ140-131000- Grand Portage to Grand Marais MN- 609 PM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TONIGHT...East wind 5 to 10 knots becoming west with gusts to around 20 knots in the late evening and overnight. Chance of showers and thunderstorms in the evening. Areas of dense fog early in the evening. Patchy dense fog in the late evening and overnight. Waves 1 to 2 feet. .MONDAY...West wind 5 to 10 knots becoming north early in the afternoon, then becoming east late in the afternoon. Patchy fog in the morning. Waves 1 to 2 feet. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and overnight. Rain showers likely through the night. Waves 1 to 2 feet building to 1 to 3 feet early in the morning. .TUESDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the morning. Chance of rain showers through the day. Waves 1 to 3 feet subsiding to 1 to 2 feet in the afternoon. Note...Wave height forecasts are for ice free areas. $$ LSZ141-131000- Grand Marais to Taconite Harbor MN- 609 PM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TONIGHT...North wind 5 knots becoming west with gusts to around 20 knots in the late evening and overnight. Chance of thunderstorms early in the evening. Chance of rain showers in the evening. Slight chance of thunderstorms late in the evening. Areas of dense fog early in the evening. Patchy dense fog in the late evening and overnight. Waves 1 to 2 feet. .MONDAY...West wind 5 knots becoming north early in the afternoon, then becoming east late in the afternoon. Patchy fog in the morning. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and overnight. Rain showers likely. Waves 1 to 3 feet. .TUESDAY...Northeast wind 5 to 10 knots. Gusts up to 20 knots early in the morning. Slight chance of rain showers through the day. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ142-131000- Taconite Harbor to Silver Bay Harbor MN- 609 PM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TONIGHT...Northwest wind 5 knots becoming west with gusts to around 20 knots in the late evening and overnight. Chance of rain showers and slight chance of thunderstorms early in the evening, then slight chance of rain showers late in the evening. Areas of dense fog early in the evening. Patchy dense fog in the late evening and overnight. Waves 1 foot or less. .MONDAY...West wind 5 knots early in the morning becoming variable 10 knots or less, then becoming northeast 5 knots in the afternoon. Patchy fog in the morning. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and overnight. Patchy fog in the evening. Rain showers in the evening. Slight chance of thunderstorms through the night. Chance of rain showers after midnight. Waves 1 to 3 feet. .TUESDAY...Northeast wind 5 to 10 knots. Slight chance of rain showers through the day. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ143-131000- Silver Bay Harbor to Two Harbors MN- 609 PM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TONIGHT...Northwest wind 5 knots becoming west in the late evening and overnight. Slight chance of thunderstorms early in the evening. Slight chance of rain showers in the evening. Areas of dense fog early in the evening. Patchy dense fog in the late evening and overnight. Waves 1 foot or less. .MONDAY...West wind 5 knots becoming northeast in the afternoon. Patchy fog in the morning. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 15 to 20 knots. Rain showers and slight chance of thunderstorms. Waves 1 to 3 feet. .TUESDAY...Northeast wind 5 to 10 knots. Chance of rain showers in the morning. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ144-131000- Two Harbors to Duluth MN- 609 PM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TONIGHT...Northwest wind 5 to 10 knots becoming west in the late evening and overnight. Slight chance of showers and thunderstorms early in the evening. Areas of dense fog early in the evening, then patchy dense fog in the late evening and overnight. Waves 1 foot or less. .MONDAY...West wind 5 knots becoming north late in the morning, then becoming northeast in the afternoon. Patchy fog in the morning. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 15 to 20 knots. Rain showers and slight chance of thunderstorms. Waves 1 to 2 feet building to 2 to 4 feet in the late evening and overnight. .TUESDAY...Northeast wind 5 to 10 knots. Chance of rain showers in the morning. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ145-131000- Duluth MN to Port Wing WI- 609 PM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TONIGHT...Northwest wind 5 to 10 knots becoming west 10 to 15 knots in the late evening and overnight. Slight chance of showers and thunderstorms early in the evening. Patchy dense fog through the night. Waves 1 to 2 feet. .MONDAY...West wind 5 knots becoming northeast in the afternoon. Patchy fog in the morning. Chance of rain showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 15 to 20 knots. Patchy fog in the evening. Rain showers and slight chance of thunderstorms through the night. Waves 1 to 3 feet building to 2 to 4 feet in the late evening and overnight. A small craft advisory may be needed. .TUESDAY...Northeast wind 5 to 10 knots. Chance of rain showers in the morning. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late morning and afternoon. Note...Wave height forecasts are for ice free areas. $$ LSZ146-131000- Port Wing to Sand Island WI- 609 PM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northwest wind 5 to 10 knots becoming west late in the evening, then rising to 10 to 15 knots after midnight. Slight chance of thunderstorms early in the evening. Slight chance of rain showers in the evening. Patchy dense fog through the night. Waves 1 to 2 feet. .MONDAY...Northwest wind 5 knots becoming northeast in the afternoon. Patchy dense fog in the morning. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 15 to 20 knots. Rain showers and slight chance of thunderstorms. Waves 1 to 3 feet. .TUESDAY...Northeast wind 5 to 10 knots. Chance of rain showers in the morning. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ147-131000- Sand Island to Bayfield WI- 609 PM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...West wind 10 to 15 knots. Slight chance of thunderstorms early in the evening. Slight chance of rain showers in the evening. Patchy dense fog through the night. Waves 1 to 2 feet. .MONDAY...Northwest wind 5 knots becoming northeast in the afternoon. Patchy dense fog in the morning. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late evening and overnight. Patchy fog in the evening. Rain showers and slight chance of thunderstorms through the night. Waves 1 to 2 feet building to 1 to 3 feet after midnight. .TUESDAY...Northeast wind 5 to 10 knots. Slight chance of rain showers through the day. Waves 1 to 3 feet. Note...Wave height forecasts are for ice free areas. $$ LSZ150-131000- Outer Apostle Islands Beyond 5 NM from Mainland- 609 PM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Southwest wind 10 to 15 knots becoming west in the late evening and overnight. Slight chance of showers and thunderstorms in the evening. Patchy dense fog in the evening, then areas of dense fog after midnight. Patchy dense fog toward daybreak. Waves 1 to 3 feet. .MONDAY...Northwest wind 5 to 10 knots becoming northeast in the afternoon. Patchy dense fog in the morning. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots increasing to 25 knots after midnight, then decreasing to 20 knots early in the morning. Patchy fog in the evening. Rain showers in the evening. Slight chance of thunderstorms through the night. Chance of rain showers after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. A small craft advisory may be needed. .TUESDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Slight chance of rain showers through the day. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. Note...Wave height forecasts are for ice free areas. $$ LSZ148-131000- Oak Point to Saxon Harbor WI- 609 PM CDT Sun Apr 12 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 1 AM CDT MONDAY... .REST OF TONIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots becoming west 5 to 10 knots after midnight. Slight chance of thunderstorms early in the evening. Slight chance of rain showers in the evening. Patchy dense fog in the late evening and overnight. Waves 1 to 2 feet. .MONDAY...West wind 5 knots becoming northeast in the afternoon. Patchy fog in the morning. Slight chance of rain showers in the afternoon. Waves 1 foot or less. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Patchy fog in the evening. Rain showers and slight chance of thunderstorms through the night. Waves 1 to 3 feet. .TUESDAY...Northeast wind 5 to 10 knots. Chance of rain showers in the morning. Waves 1 to 3 feet subsiding to 1 to 2 feet in the late morning and afternoon. Note...Wave height forecasts are for ice free areas. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH