Great Lakes Forecast
Issued by NWS
Issued by NWS
286 FZUS63 KMQT 291555 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 1055 AM EST Mon Dec 29 2025 For waters beyond 5 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. .SYNOPSIS... 28.9 inch low pressure currently analyzed over central Lake Huron moves into Quebec today while further deepening to 28.8 inches. Meanwhile, a strong high pressure of at least 30.6 inches is expanding across the Great Plains. A 29.7 inch trough dives southeast into the Upper Great Lakes late Tuesday. Weak ridging of around 30.0 inches on Wednesday will be followed up by additional 29.6-29.7inch shortwaves skirting the region the rest of the work week. LSZ162-300000- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 1055 AM EST Mon Dec 29 2025 /955 AM CST Mon Dec 29 2025/ ...GALE WARNING IN EFFECT UNTIL 10 PM EST /9 PM CST/ THIS EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 10 PM EST /9 PM CST/ THIS EVENING... .REST OF TODAY...North gales to 40 knots becoming northwest gales to 35 knots by late morning, then diminishing to 20 to 30 knots by mid afternoon. Heavy freezing spray. Waves 9 to 12 feet occasionally to 15 feet subsiding to 5 to 8 feet occasionally to 10 feet. .TONIGHT...Northwest winds 20 to 30 knots diminishing to 10 to 20 knots. Freezing spray in the evening. Waves subsiding to calm to 2 feet. .TUESDAY...West winds 5 to 15 knots becoming northwest 10 to 20 knots by mid afternoon. Snow showers. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots increasing to 20 to 30 knots after midnight. A slight chance of snow showers. Waves building to 2 to 4 feet. .WEDNESDAY...Northwest winds 20 to 30 knots. A slight chance of snow showers in the morning. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .WEDNESDAY NIGHT...Northwest gales to 35 knots. Waves building to 3 to 5 feet occasionally to 7 feet. .THURSDAY...West gales to 35 knots. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ263-300000- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 1055 AM EST Mon Dec 29 2025 ...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING... .REST OF TODAY...North gales to 45 knots with a few storm force gusts to 50 knots possible diminishing to gales to 45 knots by late morning, then becoming northwest gales to 35 knots by mid afternoon. A slight chance of snow late in the morning. Heavy freezing spray. Waves 15 to 20 feet occasionally to 25 feet subsiding to 8 to 11 feet occasionally to 14 feet. .TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots by midnight. Freezing spray in the evening. Waves subsiding to 2 to 4 feet. .TUESDAY...Northwest winds 10 to 20 knots. A chance of snow showers in the morning, then snow showers in the afternoon. Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. .TUESDAY NIGHT...Northwest winds 15 to 25 knots increasing to 20 to 30 knots after midnight. Heavy freezing spray. A chance of snow showers. Waves building to 5 to 8 feet occasionally to 10 feet. .WEDNESDAY...Northwest winds 20 to 30 knots increasing to gales to 35 knots in the afternoon. Heavy freezing spray. A slight chance of snow showers. Waves subsiding to 4 to 8 feet occasionally to 10 feet. .WEDNESDAY NIGHT...Northwest gales to 35 knots. Heavy freezing spray. Waves building to 6 to 9 feet occasionally to 11 feet. .THURSDAY...West gales to 35 knots. Heavy freezing spray. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots. Heavy freezing spray. Waves subsiding to 1 to 3 feet. $$ LSZ264-300000- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 1055 AM EST Mon Dec 29 2025 ...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING... .REST OF TODAY...North gales to 45 knots with a few storm force gusts to 55 knots possible diminishing to gales to 40 knots by mid afternoon. Heavy freezing spray. A slight chance of snow. Waves 17 to 22 feet occasionally to 28 feet subsiding to 12 to 17 feet occasionally to 21 feet. .TONIGHT...North gales to 40 knots becoming northwest 20 to 30 knots late. Heavy freezing spray. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots. A slight chance of snow showers in the morning, then snow showers likely in the afternoon. Waves subsiding to 2 to 4 feet. .TUESDAY NIGHT...North winds 20 to 30 knots becoming northwest gales to 35 knots after midnight. Heavy freezing spray. A chance of snow showers. Waves building to 8 to 11 feet occasionally to 14 feet. .WEDNESDAY...Northwest gales to 35 knots. Heavy freezing spray. A chance of snow showers. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. .WEDNESDAY NIGHT...Northwest gales to 40 knots. Heavy freezing spray. Waves building to 8 to 11 feet occasionally to 14 feet. .THURSDAY...West gales to 40 knots veering northwest. Heavy freezing spray. Waves subsiding to 7 to 10 feet occasionally to 13 feet, then building to 8 to 11 feet occasionally to 14 feet. .FRIDAY...Northwest gales to 35 knots diminishing to 20 to 30 knots. Heavy freezing spray. Waves subsiding to 2 to 4 feet. $$ LSZ265-300000- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 1055 AM EST Mon Dec 29 2025 ...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING... .REST OF TODAY...North gales to 45 knots with a few storm force gusts to 55 knots possible becoming northwest gales to 45 knots by mid afternoon. Heavy freezing spray. A chance of snow. Waves 22 to 27 feet occasionally to 34 feet subsiding to 15 to 20 feet occasionally to 25 feet. .TONIGHT...Northwest gales to 40 knots diminishing to 20 to 30 knots late. Heavy freezing spray. Waves subsiding to 5 to 8 feet occasionally to 10 feet. .TUESDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots. Freezing spray in the morning. A slight chance of snow showers in the morning, then snow showers likely in the afternoon. Waves subsiding to 2 to 4 feet. .TUESDAY NIGHT...Northwest winds 20 to 30 knots increasing to gales to 40 knots after midnight. Heavy freezing spray. Snow showers likely. Waves building to 9 to 12 feet occasionally to 15 feet. .WEDNESDAY...Northwest gales to 40 knots. Heavy freezing spray. Snow showers likely in the morning. A chance of snow showers in the afternoon. Waves subsiding to 8 to 11 feet occasionally to 14 feet. .WEDNESDAY NIGHT...Northwest gales to 45 knots. Heavy freezing spray. A chance of snow showers. Waves 8 to 11 feet occasionally to 14 feet. .THURSDAY...West gales to 40 knots. Heavy freezing spray. A chance of snow showers. Waves subsiding to 6 to 9 feet occasionally to 11 feet. .FRIDAY...Northwest gales to 35 knots diminishing to 20 to 30 knots. Heavy freezing spray. A chance of snow showers. Waves subsiding to 2 to 4 feet. $$ LSZ266-300000- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- 1055 AM EST Mon Dec 29 2025 ...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING... .REST OF TODAY...North gale force winds to 45 knots with a few storm force gusts up to 55 kts. Heavy freezing spray. A chance of snow. Waves 25 to 30 feet occasionally to 38 feet subsiding to 20 to 25 feet occasionally to 31 feet. .TONIGHT...North gales to 45 knots becoming northwest gales to 40 knots by midnight. Heavy freezing spray. A slight chance of snow showers. Waves subsiding to 9 to 12 feet occasionally to 15 feet. .TUESDAY...Northwest winds 20 to 30 knots diminishing to 15 to 25 knots. Freezing spray. A chance of snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY NIGHT...Northwest winds 20 to 30 knots increasing to gales to 40 knots after midnight. Freezing spray. Snow showers. Waves building to 10 to 14 feet occasionally to 18 feet. .WEDNESDAY...Northwest gales to 40 knots. Heavy freezing spray. Snow showers. Waves building to 11 to 15 feet occasionally to 19 feet. .WEDNESDAY NIGHT...Northwest gales to 40 knots. Heavy freezing spray. Snow showers in the evening. A chance of snow showers after midnight. Waves subsiding to 10 to 14 feet occasionally to 18 feet. .THURSDAY...Northwest gales to 40 knots. Heavy freezing spray. A chance of snow showers. Snow showers likely. Waves building to 11 to 15 feet occasionally to 19 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. .FRIDAY...Northwest gales to 35 knots. Freezing spray. Snow showers likely. A chance of snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. $$ LSZ267-300000- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 1055 AM EST Mon Dec 29 2025 ...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING... ...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING... .REST OF TODAY...North gales to 45 knots with a few storms to 55 knots. Heavy freezing spray. Snow likely late in the morning. A chance of snow showers in the afternoon. Waves 20 to 25 feet occasionally to 31 feet subsiding to 17 to 22 feet occasionally to 28 feet. .TONIGHT...North gales to 45 knots becoming northwest gales to 40 knots by midnight. Heavy freezing spray. A slight chance of snow showers. Waves subsiding to 9 to 12 feet occasionally to 15 feet. .TUESDAY...Northwest gales to 35 knots diminishing to 15 to 25 knots. Freezing spray. A slight chance of snow showers in the morning. Snow showers likely in the afternoon. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY NIGHT...North winds 20 to 30 knots increasing to gales to 35 knots after midnight. Freezing spray. Snow showers. Waves building to 7 to 10 feet occasionally to 13 feet. .WEDNESDAY...North gales to 35 knots backing northwest in the afternoon. Heavy freezing spray. Snow showers. Waves building to 10 to 14 feet occasionally to 18 feet. .WEDNESDAY NIGHT...Northwest gales to 40 knots. Heavy freezing spray. Snow showers. Waves 10 to 14 feet occasionally to 18 feet. .THURSDAY...Northwest gales to 40 knots becoming west gales to 35 knots. Heavy freezing spray. Snow showers. Waves building to 11 to 15 feet occasionally to 19 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. .FRIDAY...Northwest winds 20 to 30 knots. Freezing spray. Snow showers likely. A chance of snow showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. $$ LSZ261-300000- MAFOR 2916/ Superior West...GALE WARNING IN EFFECT...HEAVY FREEZING SPRAY WARNING IN EFFECT...11752 12740 11730 12720 11717 11617. Waves 8 to 12 feet subsiding to 6 to 9 feet this afternoon. Waves 5 to 8 feet subsiding to 1 to 3 feet tonight. Waves 1 to 3 feet Tuesday morning. Superior North Central...GALE WARNING IN EFFECT...HEAVY FREEZING SPRAY WARNING IN EFFECT...11872 14852 11742 11740 11730. Waves 16 to 21 feet subsiding to 13 to 17 feet this afternoon. Waves 12 to 16 feet subsiding to 6 to 9 feet tonight. Waves 4 to 7 feet subsiding to 3 to 5 feet Tuesday morning. Superior South Central...GALE WARNING IN EFFECT...HEAVY FREEZING SPRAY WARNING IN EFFECT...11877 12762 11752 11750 12740 11730. A chance of snow showers this evening. Waves 21 to 26 feet subsiding to 18 to 23 feet this afternoon. Waves 16 to 21 feet subsiding to 9 to 12 feet tonight. Waves 7 to 10 feet subsiding to 5 to 8 feet Tuesday morning. Superior East...GALE WARNING IN EFFECT...HEAVY FREEZING SPRAY WARNING IN EFFECT...11872 12862 11852 11752 11750 12740. A chance of snow late this morning, then a chance of snow showers this afternoon. A chance of snow showers this evening. Waves 17 to 22 feet subsiding to 16 to 21 feet this afternoon. Waves 14 to 19 feet subsiding to 10 to 13 feet tonight. Waves 9 to 12 feet subsiding to 6 to 9 feet Tuesday morning. $$ BW Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes