587
FZUS63 KDTX 180748
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
348 AM EDT Fri Sep 18 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 tracks north of the Great Lakes today. A
low pressure system follows a stalled front from the central
Plains into the Ohio Valley this weekend. Another area of high
pressure then builds into northern Ontario on Sunday.

LCZ460-181600-
Lake St Clair-
348 AM EDT Fri Sep 18 2026

.TODAY...North winds 10 to 15 knots becoming northeast 5 to 10 knots
early in the afternoon...then increasing to 10 to 15 knots late in
the afternoon. Mostly sunny. Waves 2 feet or less.
.TONIGHT...Northeast winds 15 to 20 knots diminishing to 10 to 15
knots after midnight. Partly cloudy this evening becoming mostly
cloudy. Waves 1 to 3 feet.
.SATURDAY...East winds 10 to 15 knots. Mostly cloudy. A chance of
light showers until late afternoon...then showers likely early in
the afternoon. Waves 2 feet or less.
.SATURDAY NIGHT...East winds 10 to 15 knots. Cloudy. A chance of
light showers ...then light showers likely after midnight. Waves 2
feet or less.
.SUNDAY...Northeast winds 10 to 15 knots increasing to 20 to 25
knots in the evening. Mostly cloudy with a chance of showers. Waves
1 to 3 feet.
.MONDAY...Northeast winds to 30 knots. Mostly cloudy. Waves 2 to 4
feet. A Small Craft Advisory may be needed.
.TUESDAY...Northeast winds to 30 knots. Mostly cloudy with a
chance of showers. Waves 2 to 4 feet.

$$

TF

Experimental modernized open lake forecast is available online at
weather.gov/dtx/glftablesc

Graphical marine forecasts are available at weather.gov/greatlakes