FZUS53 KDLH 180400 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 1100 PM CDT Sun May 17 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. LSZ140-181000- Grand Portage to Grand Marais MN- 1100 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots decreasing to 20 knots toward daybreak. Chance of rain showers late in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 4 to 6 feet. Waves occasionally to 7 feet. .MONDAY...Northeast wind 10 to 15 knots. Gusts up to 20 knots in the late morning and early afternoon. Chance of showers and thunderstorms in the morning. Waves 2 to 4 feet. .MONDAY NIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots. Rain showers after midnight. Waves 4 to 6 feet. Waves occasionally to 8 feet. A small craft advisory may be needed. .TUESDAY...North wind 20 to 25 knots with gusts to around 30 knots becoming northwest 15 to 20 knots with gusts to around 25 knots in the afternoon. Rain showers in the morning. Waves 4 to 7 feet subsiding to 1 to 2 feet. Waves occasionally to 9 feet. A small craft advisory may be needed. $$ LSZ141-181000- Grand Marais to Taconite Harbor MN- 1100 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots decreasing to 20 knots toward daybreak. Chance of rain showers late in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 4 to 7 feet. Waves occasionally to 9 feet. .MONDAY...Northeast wind 5 to 10 knots becoming west late in the morning, then becoming southeast early in the afternoon becoming northeast late in the afternoon. Chance of showers and thunderstorms in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots after midnight. Slight chance of rain showers in the evening, then rain showers after midnight. Waves 1 to 3 feet building to 2 to 4 feet after midnight. A small craft advisory may be needed. .TUESDAY...North wind 5 to 10 knots with gusts to around 20 knots becoming northwest in the afternoon. Rain showers in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. $$ LSZ142-181000- Taconite Harbor to Silver Bay Harbor MN- 1100 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots decreasing to 20 knots toward daybreak. Chance of rain showers late in the evening. Chance of thunderstorms through the night. Rain showers likely after midnight. Waves 5 to 8 feet. Waves occasionally to 10 feet. .MONDAY...North wind 5 to 10 knots becoming northwest late in the morning, then becoming southeast early in the afternoon becoming northeast late in the afternoon. Chance of showers and thunderstorms in the morning. Waves 3 to 5 feet subsiding to 1 to 2 feet late in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots. Chance of rain showers in the evening, then rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet after midnight. A small craft advisory may be needed. .TUESDAY...North wind 5 to 10 knots becoming northwest in the afternoon. Rain showers in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon. A small craft advisory may be needed. $$ LSZ143-181000- Silver Bay Harbor to Two Harbors MN- 1100 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots toward daybreak. Chance of rain showers late in the evening. Chance of thunderstorms through the night. Rain showers likely after midnight. Waves 5 to 8 feet subsiding to 4 to 6 feet toward daybreak. Waves occasionally to 11 feet. .MONDAY...Northeast wind 5 to 10 knots. Chance of rain showers and slight chance of thunderstorms in the morning. Waves 3 to 5 feet subsiding to 1 to 2 feet late in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots late in the evening increasing to 25 knots, then decreasing to 20 knots early in the morning. Chance of rain showers and slight chance of thunderstorms in the evening, then rain showers after midnight. Waves 1 to 2 feet building to 2 to 4 feet after midnight. A small craft advisory may be needed. .TUESDAY...North wind 5 to 10 knots becoming northwest in the late morning and afternoon. Rain showers in the morning. Waves 2 to 4 feet. A small craft advisory may be needed. $$ LSZ144-181000- Two Harbors to Duluth MN- 1100 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots toward daybreak. Rain showers likely late in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 6 to 9 feet subsiding to 4 to 6 feet toward daybreak. Waves occasionally to 12 feet. .MONDAY...Northeast wind 5 to 10 knots. Chance of rain showers and slight chance of thunderstorms in the morning. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots late in the evening increasing to 25 knots, then decreasing to 20 knots early in the morning. Rain showers likely 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 in the late evening and overnight. Waves occasionally to 7 feet. A small craft advisory may be needed. .TUESDAY...North wind 10 to 15 knots becoming northwest 5 to 10 knots in the late morning and afternoon. Rain showers in the morning. Waves 2 to 4 feet. A small craft advisory may be needed. $$ LSZ145-181000- Duluth MN to Port Wing WI- 1100 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots toward daybreak. Rain showers likely late in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 6 to 9 feet subsiding to 4 to 6 feet toward daybreak. Waves occasionally to 12 feet. .MONDAY...Northeast wind 5 to 10 knots. Slight chance of thunderstorms in the morning. Slight chance of rain showers through the day. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots late in the evening increasing to 25 knots, then decreasing to 20 knots early in the morning. Rain showers likely in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 3 to 5 feet in the late evening and overnight. Waves occasionally to 7 feet. A small craft advisory may be needed. .TUESDAY...North wind 10 to 15 knots with gusts to around 20 knots becoming northwest with gusts to around 20 knots in the late morning and afternoon. Rain showers in the morning. Waves 2 to 4 feet. A small craft advisory may be needed. $$ LSZ146-181000- Port Wing to Sand Island WI- 1100 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northeast wind 10 to 15 knots with gusts to around 20 knots. Chance of rain showers late in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 5 to 8 feet subsiding to 3 to 5 feet toward daybreak. Waves occasionally to 10 feet. .MONDAY...Northeast wind 5 to 10 knots. Chance of rain showers and slight chance of thunderstorms in the morning, then slight chance of rain showers in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .MONDAY NIGHT...Northeast wind 10 to 15 knots. Gusts up to 25 knots. Chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 3 feet building to 3 to 5 feet after midnight. Waves occasionally to 7 feet. A small craft advisory may be needed. .TUESDAY...Northeast wind 5 to 10 knots with gusts to around 20 knots becoming northwest in the late morning and afternoon. Rain showers in the morning. Waves 3 to 5 feet. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ147-181000- Sand Island to Bayfield WI- 1100 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots late in the evening. Chance of rain showers late in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 4 to 7 feet. Waves occasionally to 9 feet. .MONDAY...North wind 5 to 10 knots becoming east late in the afternoon. Chance of rain showers and slight chance of thunderstorms in the morning, then slight chance of rain showers in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .MONDAY NIGHT...Northeast wind 15 to 20 knots with gusts to around 25 knots. Chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 2 feet building to 3 to 5 feet in the late evening and overnight. Waves occasionally to 7 feet. A small craft advisory may be needed. .TUESDAY...North wind 10 to 15 knots with gusts to around 20 knots becoming northwest 5 to 10 knots in the late morning and afternoon. Rain showers in the morning. Waves 3 to 5 feet subsiding to 1 to 3 feet late in the afternoon. Waves occasionally to 7 feet. A small craft advisory may be needed. $$ LSZ150-181000- Outer Apostle Islands Beyond 5 NM from Mainland- 1100 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots decreasing to 20 knots toward daybreak. Chance of rain showers late in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 5 to 8 feet. Waves occasionally to 10 feet. .MONDAY...North wind 5 to 10 knots becoming northeast late in the afternoon. Chance of rain showers and slight chance of thunderstorms in the morning, then slight chance of rain showers in the afternoon. Waves 3 to 5 feet subsiding to 1 to 3 feet late in the afternoon. .MONDAY NIGHT...Northeast wind 15 to 20 knots. Gusts up to 20 knots increasing to 25 knots in the late evening and overnight. Chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers after midnight. Waves 1 to 3 feet building to 5 to 8 feet. Waves occasionally to 10 feet. A small craft advisory may be needed. .TUESDAY...Northeast wind 10 to 15 knots with gusts to around 25 knots becoming northwest 5 to 10 knots in the afternoon. Rain showers in the morning. Waves 6 to 9 feet subsiding to 4 to 6 feet in the afternoon. Waves occasionally to 11 feet. A small craft advisory may be needed. $$ LSZ121-181000- Chequamegon Bay-Bayfield to Oak Point WI- 1100 PM CDT Sun May 17 2026 .REST OF TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots late in the evening. Chance of rain showers late in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 4 to 6 feet subsiding to 3 to 5 feet toward daybreak. Waves occasionally to 8 feet. .MONDAY...North wind 5 knots becoming northeast in the afternoon. Chance of rain showers and slight chance of thunderstorms in the morning, then slight chance of rain showers in the afternoon. Waves 1 to 3 feet. .MONDAY NIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots in the late evening and early morning decreasing to 20 knots. Chance of rain showers and slight chance of thunderstorms in the evening, then rain showers and chance of thunderstorms after midnight. Waves 1 to 3 feet building to 5 to 8 feet. Waves occasionally to 10 feet. A small craft advisory may be needed. .TUESDAY...North wind 10 to 15 knots with gusts to around 20 knots becoming northwest with gusts to around 20 knots in the late morning and afternoon. Rain showers in the morning. Waves 1 to 2 feet. $$ LSZ148-181000- Oak Point to Saxon Harbor WI- 1100 PM CDT Sun May 17 2026 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT MONDAY... .REST OF TONIGHT...Northeast wind 10 to 15 knots. Gusts up to 20 knots late in the evening. Chance of rain showers late in the evening. Chance of thunderstorms through the night. Rain showers after midnight. Waves 4 to 6 feet. Waves occasionally to 8 feet. .MONDAY...North wind 5 knots becoming northeast in the afternoon. Chance of rain showers and slight chance of thunderstorms in the morning, then slight chance of rain showers in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. .MONDAY NIGHT...Northeast wind 15 to 20 knots. Gusts up to 25 knots in the late evening and early morning decreasing to 20 knots. Rain showers likely and slight chance of thunderstorms in the evening, then rain showers and chance of thunderstorms after midnight. Waves 1 to 3 feet building to 5 to 8 feet. Waves occasionally to 10 feet. A small craft advisory may be needed. .TUESDAY...North wind 15 to 20 knots with gusts to around 25 knots becoming northwest 10 to 15 knots with gusts to around 20 knots in the late morning and afternoon. Rain showers in the morning. Waves 5 to 8 feet subsiding to 3 to 5 feet late in the afternoon. Waves occasionally to 10 feet. A small craft advisory may be needed. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH