


Great Lakes Forecast
Issued by NWS
Issued by NWS
547 FZUS63 KDTX 091939 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 339 PM EDT Thu Oct 9 2025 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, 30.60 inches, centered over southern Ontario will continue to influence the region through late this evening. Weakening low pressure, averaging 29.90 inches, then drops through the central Great Lakes late Friday into Saturday. LCZ460-100345- Lake St Clair- 339 PM EDT Thu Oct 9 2025 .TONIGHT...Southeast winds 5 to 10 knots. Mostly clear. Waves 2 feet or less. .FRIDAY...South winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon. Mostly sunny. Waves 2 feet or less. .FRIDAY NIGHT...Southwest winds 10 to 15 knots. Partly cloudy early in the evening becoming mostly cloudy. A chance of light showers. Waves 2 feet or less. .SATURDAY...West winds 10 to 15 knots diminishing to 5 to 10 knots in the late morning and early afternoon...then veering to the north early in the afternoon. Partly sunny. A chance of light showers. Waves 2 feet or less. .SATURDAY NIGHT...Northeast winds 5 to 10 knots. Partly cloudy. A chance of light showers. Waves 2 feet or less. .SUNDAY...East winds 5 to 10 knots increasing to 10 to 15 knots in the afternoon and evening. Partly sunny in the morning becoming mostly clear. Waves 2 feet or less. .MONDAY...East winds 10 to 15 knots. Mostly clear. Waves 2 feet or less. .TUESDAY...North winds 10 to 15 knots. Mostly clear. Waves 2 feet or less. $$ KDK Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes