820
FZUS63 KMQT 290801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EDT Wed Jul 29 2026

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...

Weak ridging near 30.0 inches over Lake Superior remains until
Thursday morning. The ridging then gives way to weak troughing of
29.9 inches before becoming weak ridging of 29.9 to 30.0 inches
returns again for the rest of this week into early next week.



LSZ162-292000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 AM EDT Wed Jul 29 2026 /300 AM CDT Wed Jul 29 2026/

.EARLY THIS MORNING...North winds less than 10 knots. Waves calm
to 2 feet.
.TODAY...North winds less than 10 knots increasing to 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.TONIGHT...East winds less than 10 knots backing north late.
Waves calm to 2 feet.
.THURSDAY...East winds less than 10 knots becoming southwest 5 to
15 knots in the afternoon, then veering west late. Patchy smoke.
A chance of showers and thunderstorms by mid afternoon. Waves
calm to 2 feet.
.THURSDAY NIGHT...West winds 5 to 15 knots. Patchy smoke through
midnight. A chance of showers through midnight. A slight chance
of thunderstorms. Showers likely after midnight. Waves calm to
2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Showers likely through
early afternoon, then a chance of showers by mid afternoon. Waves
calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Northeast winds 10 to 20 knots. Waves calm to 2 feet.

$$

LSZ263-292000-
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-
400 AM EDT Wed Jul 29 2026

.EARLY THIS MORNING...South winds less than 10 knots. Waves calm
to 2 feet.
.TODAY...South winds 5 to 15 knots veering southwest in the
afternoon, then backing east late. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming southeast less than
10 knots after midnight, then becoming south 5 to 15 knots late.
Patchy smoke after midnight. A slight chance of showers after
midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots veering southwest in the
afternoon, then backing south late. Patchy smoke. A slight chance
of showers and thunderstorms by mid afternoon. Waves calm to
2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Patchy smoke through midnight. A chance of
showers and a slight chance of thunderstorms. Waves calm to
2 feet.
.FRIDAY...Southwest winds 5 to 15 knots veering west by mid
afternoon. Showers likely through early afternoon, then a chance
of showers by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots becoming north less than
10 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.

$$

LSZ264-292000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 AM EDT Wed Jul 29 2026

.EARLY THIS MORNING...South winds less than 10 knots. Waves calm
to 2 feet.
.TODAY...South winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then becoming southeast less than
10 knots late. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south in the
afternoon. Patchy smoke. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots veering west after
midnight. Patchy smoke through midnight. A slight chance of
thunderstorms through midnight. A chance of showers. Waves calm
to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY NIGHT...West winds less than 10 knots veering north after
midnight. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots becoming northeast less
than 10 knots. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots veering southeast. Waves calm
to 2 feet.

$$

LSZ265-292000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 AM EDT Wed Jul 29 2026

.EARLY THIS MORNING...South winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...South winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.TONIGHT...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots backing southeast in the
afternoon, then increasing to 10 to 20 knots late. Patchy smoke
by mid afternoon. A slight chance of showers and thunderstorms by
mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. Patchy smoke through midnight. A
chance of showers and a slight chance of thunderstorms. Waves
calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Showers likely. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots veering north after
midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots veering southeast. Waves calm
to 2 feet.

$$

LSZ266-292000-
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-
400 AM EDT Wed Jul 29 2026

.EARLY THIS MORNING...South winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...South winds 5 to 15 knots backing southeast in the
afternoon. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots late. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. A chance of showers and a slight
chance of thunderstorms. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots backing southwest by mid
afternoon. Showers likely through early afternoon, then a chance
of showers by mid afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots veering north after
midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.

$$

LSZ267-292000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 AM EDT Wed Jul 29 2026

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...West winds 5 to 15 knots becoming east less than
10 knots late. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots veering southeast after
midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots. A chance of showers
and a slight chance of thunderstorms after midnight. Waves calm
to 2 feet.
.FRIDAY...West winds 5 to 15 knots. A chance of showers through
early afternoon. Showers likely by mid afternoon. Waves calm to
2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. A chance of showers. Waves calm to 2 feet.
.SATURDAY...North winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ261-291400-
MAFOR 2909/
Superior West 11400 12500 11800 14200. Waves 1 foot or less.

Superior North Central 14400 14300. Waves 1 foot or less.

Superior South Central 12400 13300 13310. Waves 1 foot or less.

Superior East 11700 11600 11500 12300 11200 12300. Waves 1 foot
or less.

$$

WFO MQT

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes