563 FZUS63 KDTX 201940 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 340 PM EDT Wed May 20 2026 For waters beyond five nautical miles off shore on Lake Huron 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...High pressure, 30.40 inches, will continue to build over the Great Lakes this evening then slowly move east across the region through Friday morning. As this occurs, northwest flow will veer to the northeast and persist into Friday. LHZ361-210345- Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 340 PM EDT Wed May 20 2026 .TONIGHT...Northwest winds 10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet early in the morning. .THURSDAY...Northeast winds 5 to 10 knots veering to the east in the afternoon. Waves 2 feet or less. .THURSDAY NIGHT...Light and variable winds becoming east 5 to 10 knots after midnight. Waves 2 feet or less. .FRIDAY...East winds 10 to 15 knots. Waves 1 to 3 feet building to 2 to 4 feet early in the afternoon. .FRIDAY NIGHT...East winds 15 to 20 knots increasing to 20 to 25 knots with gusts to around 30 knots after midnight. A chance of showers after midnight. Waves 3 to 5 feet building to 6 to 9 feet after midnight. Waves occasionally around 12 feet. .SATURDAY...East winds to 30 knots with gusts to 35 knot gales decreasing to 10 to 15 knots. Showers likely...then a chance of showers late in the afternoon. Waves 8 to 12 feet. Waves occasionally around 15 feet. .SUNDAY...East winds 5 to 10 knots veering to the south by midnight. Waves 3 to 5 feet subsiding to 1 to 3 feet . .MONDAY...West winds 5 to 10 knots backing to the south by midnight. Waves 2 feet or less. $$ LHZ362-363-210345- Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- 340 PM EDT Wed May 20 2026 .TONIGHT...North winds 10 to 15 knots. Waves 3 to 5 feet. .THURSDAY...Northeast winds 10 to 15 knots decreasing to 5 to 10 knots in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and afternoon. .THURSDAY NIGHT...Northeast winds 5 to 10 knots. Waves 1 to 3 feet. .FRIDAY...East winds 10 to 15 knots. Waves 1 to 3 feet building to 2 to 4 feet early in the afternoon. .FRIDAY NIGHT...East winds 15 to 20 knots. Gusts to 30 knots after midnight. A chance of showers after midnight. Waves 5 to 7 feet. Waves occasionally around 10 feet. .SATURDAY...East winds 20 to 25 knots with gusts to 35 knot gales becoming southeast 10 to 15 knots. Showers in the morning. Rain showers likely late in the morning...then a chance of showers late in the evening. Waves 8 to 12 feet. Waves occasionally around 15 feet. .SUNDAY...Southeast winds 5 to 10 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet . .MONDAY...Northwest winds 5 to 10 knots veering to the north early in the evening...then veering to the southeast by midnight. Waves 2 feet or less. $$ LHZ462>464-210345- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 340 PM EDT Wed May 20 2026 .TONIGHT...North winds 10 to 15 knots decreasing to 5 to 10 knots late in the evening...then increasing to 10 to 15 knots after midnight. Waves 3 to 5 feet. .THURSDAY...North winds 10 to 15 knots becoming northeast 5 to 10 knots late in the morning...then becoming north 10 to 15 knots in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late morning and early afternoon...then building to 2 to 4 feet late in the afternoon. .THURSDAY NIGHT...North winds 10 to 15 knots veering to the east after midnight. Waves 2 to 4 feet subsiding to 1 to 3 feet after midnight. .FRIDAY...East winds 10 to 15 knots. Waves 2 to 4 feet. .FRIDAY NIGHT...Northeast winds 10 to 15 knots becoming east 20 to 25 knots with gusts to around 30 knots. Showers likely after midnight. Waves 4 to 6 feet. .SATURDAY...East winds 20 to 25 knots with gusts to around 30 knots decreasing to 15 to 20 knots late in the afternoon... then becoming southeast 5 to 10 knots late in the evening. Showers. Rain showers likely late in the afternoon...then a chance of showers late in the evening. Waves 5 to 7 feet subsiding to 2 to 4 feet late in the evening. Waves occasionally around 10 feet. .SUNDAY...Southeast winds 5 to 10 knots. A chance of showers until early evening. Waves 2 feet or less. .MONDAY...Light and variable winds becoming north 5 to 10 knots until early evening...then veering to the northeast by midnight. Waves 2 feet or less. $$ LHZ461-210345- MAFOR 2021/ HURON NORTH 13710 11800 11100 12200 11300. Waves 2 to 4 feet building to 3 to 5 feet...THEN subsiding to 1 to 3 feet tonight. Waves 2 feet or less Thursday. HURON SOUTH 14810 14110. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight. Waves 1 to 3 feet Thursday. $$ DRK Experimental modernized open lake forecast is available online at weather.gov/dtx/glftable (all lower case) Graphical marine forecasts are available online at weather.gov/greatlakes (all lower case)  595 FZUS63 KDTX 201940 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 340 PM EDT Wed May 20 2026 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...High pressure, 30.40 inches, will continue to build over the Great Lakes this evening then slowly move east across the region through Friday morning. As this occurs, northwest flow will veer to the northeast and persist into Friday. LCZ460-210345- Lake St Clair- 340 PM EDT Wed May 20 2026 .TONIGHT...Northeast winds 10 to 15 knots. Mostly cloudy becoming mostly clear. Waves 1 to 3 feet. .THURSDAY...Northeast winds 10 to 15 knots. Sunny. Waves 2 feet or less. .THURSDAY NIGHT...Northeast winds 15 to 20 knots diminishing to 10 to 15 knots by midnight...then increasing to 15 to 20 knots after midnight. Mostly clear. Waves 1 to 3 feet. .FRIDAY...East winds 15 to 20 knots. Partly sunny. Waves 2 to 4 feet. .FRIDAY NIGHT...East winds 20 to 25 knots increasing to 30 knots after midnight. Showers likely ...then showers after midnight. Waves 3 to 5 feet. Waves occasionally around 7 feet. A Small Craft Advisory may be needed. .SATURDAY...East winds to 30 knots becoming southeast 10 to 15 knots. Showers...then a chance of showers in the evening. Waves 2 to 4 feet subsiding to 1 to 3 feet in the evening. .SUNDAY...South winds 5 to 10 knots. Mostly cloudy with a chance of showers. Waves 2 feet or less. .MONDAY...East winds 5 to 10 knots. Partly cloudy. Waves 2 feet or less. $$ DRK Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes