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FZUS63 KDTX 310743
GLFSC

Lake St Clair Forecast
National Weather Service Detroit/Pontiac MI
343 AM EDT Fri Jul 31 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, 30.30 inches, governs Great Lakes
conditions today. Low pressure then tracks into the Ohio Valley
this weekend, with local pressure averaging around 29.90 inches.
This brings rain and isolated thunderstorm chances to the Great
Lakes Friday night into Sunday along with elevated winds and
waves into Saginaw Bay and the Thumb nearshores.

LCZ460-311600-
Lake St Clair-
343 AM EDT Fri Jul 31 2026

.TODAY...Light and variable winds becoming southeast 5 to 10 knots
in the afternoon. Mostly sunny. Waves 2 feet or less.
.TONIGHT...South winds 5 to 10 knots backing to the southeast early
in the morning. Cloudy. A chance of light showers after midnight.
Waves 2 feet or less.
.SATURDAY...East winds 5 to 10 knots. Cloudy. A chance of light
showers in the late morning and early afternoon. Light showers
likely early in the afternoon. Waves 2 feet or less.
.SATURDAY NIGHT...Northeast winds 10 to 15 knots. Showers...then
light showers likely after midnight. Waves 2 feet or less.
.SUNDAY...Northeast winds 10 to 15 knots becoming north 15 to 20
knots in the evening. Partly sunny with showers likely and a chance
of thunderstorms...then partly cloudy in the evening. Waves 1 to 3
feet.
.MONDAY...Northeast winds 15 to 20 knots. Mostly clear. Waves 2 feet
or less.
.TUESDAY...East winds 5 to 10 knots. Mostly clear. Waves 2 feet or
less.

$$

TF

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

Graphical marine forecasts are available at weather.gov/greatlakes