FZUS53 KDLH 181438 NSHDLH Nearshore Marine Forecast National Weather Service Duluth MN 937 AM CDT Sat Jul 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. LSZ140-182200- Grand Portage to Grand Marais MN- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...South wind 5 to 10 knots with gusts to around 20 knots becoming southwest in the afternoon. Smoke late in the morning, then areas of smoke early in the afternoon. Patchy smoke late. Waves 1 foot or less. .TONIGHT...Southwest wind 5 to 10 knots. Patchy smoke. Waves 1 foot or less. .SUNDAY...Southwest wind 10 to 15 knots with gusts to around 20 knots. Areas of smoke in the morning, then patchy smoke in the afternoon. Waves 1 to 2 feet. .SUNDAY NIGHT...Southwest wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Patchy smoke in the evening. Slight chance of rain showers in the evening. Slight chance of thunderstorms through the night. Rain showers likely after midnight. Waves 1 to 2 feet. $$ LSZ141-182200- Grand Marais to Taconite Harbor MN- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...Northwest wind 5 to 10 knots becoming southwest in the afternoon. Patchy smoke. Waves 1 foot or less. .TONIGHT...Southwest wind 5 knots early in the evening becoming variable 10 knots or less. Patchy smoke. Waves 1 foot or less. .SUNDAY...South wind 5 knots. Patchy smoke. Waves 1 foot or less. .SUNDAY NIGHT...Southwest wind 5 knots early in the evening becoming variable 10 knots or less, then becoming southwest 5 to 10 knots after midnight. Patchy smoke in the evening. Rain showers likely and slight chance of thunderstorms after midnight. Waves 1 foot or less. $$ LSZ142-182200- Taconite Harbor to Silver Bay Harbor MN- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...Northwest wind 5 knots late in the morning becoming variable 10 knots or less. Patchy smoke. Waves 1 foot or less. .TONIGHT...Variable winds 10 knots or less. Patchy smoke. Waves 1 foot or less. .SUNDAY...Variable winds 10 knots or less becoming south 5 knots in the late morning and afternoon. Patchy smoke. Waves 1 foot or less. .SUNDAY NIGHT...Variable winds 10 knots or less becoming southwest 5 knots in the late evening and overnight. Patchy smoke in the evening. Rain showers likely and slight chance of thunderstorms after midnight. Waves 1 foot or less. $$ LSZ143-182200- Silver Bay Harbor to Two Harbors MN- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...South wind 5 knots in the late morning and early afternoon becoming variable 10 knots or less. Patchy smoke through the day. Waves 1 foot or less. .TONIGHT...Variable winds 10 knots or less. Patchy smoke. Waves 1 foot or less. .SUNDAY...Variable winds 10 knots or less becoming southwest 5 knots in the late morning and afternoon. Patchy smoke. Waves 1 foot or less. .SUNDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to 20 knots early in the morning. Patchy smoke in the evening. Showers likely and slight chance of thunderstorms after midnight. Waves 1 to 2 feet. $$ LSZ144-182200- Two Harbors to Duluth MN- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...Northeast wind 5 knots becoming east in the afternoon. Patchy smoke through the day. Waves 1 foot or less. .TONIGHT...Northeast wind 5 knots early in the evening becoming variable 10 knots or less. Patchy smoke. Waves 1 foot or less. .SUNDAY...Southwest wind 5 knots. Patchy smoke. Waves 1 foot or less. .SUNDAY NIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots. Showers likely and slight chance of thunderstorms after midnight. Waves 1 to 2 feet. $$ LSZ145-182200- Duluth MN to Port Wing WI- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...Northwest wind 5 knots becoming east in the afternoon. Patchy smoke in the afternoon. Waves 1 foot or less. .TONIGHT...Northeast wind 5 knots early in the evening becoming variable 10 knots or less, then becoming southeast 5 knots after midnight becoming southwest. Patchy smoke. Waves 1 foot or less. .SUNDAY...Southwest wind 5 knots. Patchy smoke through the day. Waves 1 foot or less. .SUNDAY NIGHT...Southwest wind 15 to 20 knots. Showers likely and slight chance of thunderstorms after midnight. Waves 1 to 2 feet. $$ LSZ146-182200- Port Wing to Sand Island WI- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...South wind 5 knots becoming southeast early in the afternoon, then becoming variable 10 knots or less late. Patchy smoke through the day. Waves 1 foot or less. .TONIGHT...Variable winds 10 knots or less. Patchy smoke. Waves 1 foot or less. .SUNDAY...Southwest wind 5 knots. Patchy smoke. Waves 1 foot or less. .SUNDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to 20 knots after midnight. Showers likely and slight chance of thunderstorms after midnight. Waves 1 to 2 feet. $$ LSZ147-182200- Sand Island to Bayfield WI- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...Northwest wind 5 knots becoming southeast in the afternoon. Patchy smoke. Waves 1 foot or less. .TONIGHT...Variable winds 10 knots or less becoming southwest 5 knots early in the morning. Patchy smoke. Waves 1 foot or less. .SUNDAY...Southwest wind 5 knots. Areas of smoke. Waves 1 foot or less. .SUNDAY NIGHT...Southwest wind 5 to 10 knots. Gusts up to 20 knots early in the morning. Patchy smoke in the evening. Chance of showers and slight chance of thunderstorms after midnight. Waves 1 foot or less. $$ LSZ150-182200- Outer Apostle Islands Beyond 5 NM from Mainland- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...Northwest wind 10 to 15 knots becoming southwest 5 knots early in the afternoon, then becoming south late. Patchy smoke. Waves 1 foot or less. .TONIGHT...South wind 5 knots becoming southwest early in the morning. Patchy smoke in the evening, then areas of smoke after midnight. Waves 1 foot or less. .SUNDAY...Southwest wind 5 knots becoming south late in the afternoon. Areas of smoke. Waves 1 foot or less. .SUNDAY NIGHT...South wind 10 to 15 knots with gusts to around 20 knots. Areas of smoke in the evening. Chance of showers and slight chance of thunderstorms after midnight. Waves 1 to 2 feet. $$ LSZ121-182200- Chequamegon Bay-Bayfield to Oak Point WI- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...North wind 5 to 10 knots becoming east in the afternoon. Patchy smoke. Waves 1 foot or less. .TONIGHT...East wind 5 knots early in the evening becoming variable 10 knots or less, then becoming southwest 5 knots after midnight. Areas of smoke. Waves 1 foot or less. .SUNDAY...Southwest wind 5 knots. Areas of smoke. Waves 1 foot or less. .SUNDAY NIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots. Chance of showers and slight chance of thunderstorms after midnight. Waves 1 foot or less. $$ LSZ148-182200- Oak Point to Saxon Harbor WI- 937 AM CDT Sat Jul 18 2026 .REST OF TODAY...North wind 5 knots becoming east late. Patchy smoke. Waves 1 foot or less. .TONIGHT...East wind 5 knots becoming southwest after midnight. Areas of smoke in the evening, then smoke after midnight. Waves 1 foot or less. .SUNDAY...Southwest wind 5 knots. Smoke in the morning, then areas of smoke in the afternoon. Waves 1 foot or less. .SUNDAY NIGHT...Southwest wind 10 to 15 knots with gusts to around 20 knots. Areas of smoke in the evening. Chance of showers and slight chance of thunderstorms after midnight. Waves 1 to 2 feet. $$ Graphical marine forecasts are available online at: weather.gov/greatlakes WFO DLH