211
FZUS63 KMQT 130801
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 AM EDT Wed May 13 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...

A 29.6 inch low will depart the region today, tracking over Lake
Huron to eastern Ontario where it will stall through Thursday
morning. Ridging moves back over Lake Superior in its wake and
builds to 30.1 inches tonight into Thursday. This ridging is pressed
southeast to the Lower Great Lakes late Thursday into Friday while a
29.1 inch low emanates off the Canadian Rockies. This low is
expected to bring troughing of 29.6 inches over Lake Superior Friday
into Friday night as it tracks to near James Bay at 29.3 inches by
Saturday morning. Ridging of 30.1 inches builds over the lake from
northern Ontario Saturday night into Sunday, followed by another
29.7 inch trough extending from the central Plains early next week.


LSZ162-132000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 AM EDT Wed May 13 2026 /301 AM CDT Wed May 13 2026/

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves 1 to
3 feet.
.TODAY...Northwest winds 5 to 15 knots backing southwest late.
Waves subsiding to calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots backing northeast after
midnight, then veering east late. Waves calm to 2 feet.
.THURSDAY...East winds 5 to 15 knots increasing to 15 to
25 knots. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...East winds 15 to 25 knots veering south after
midnight. Rain showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 20 to 30 knots veering west after
midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...West winds 15 to 25 knots becoming northeast 10 to
20 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.SUNDAY...Northeast winds 20 to 30 knots increasing to gales to
35 knots. A chance of rain showers, then rain showers likely.
Waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ263-132000-
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-
401 AM EDT Wed May 13 2026

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves 2 to
4 feet.
.TODAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves subsiding to calm to 2 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering northeast after
midnight, then becoming east less than 10 knots late. Waves calm
to 2 feet.
.THURSDAY...East winds less than 10 knots increasing to 10 to
20 knots. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots becoming south
15 to 25 knots after midnight. A chance of rain showers through
midnight, then rain showers likely after midnight. Waves building
to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...South winds 15 to 25 knots veering southwest by mid
afternoon. Waves building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...West gales to 35 knots becoming east 5 to 15 knots.
Waves building to 6 to 9 feet occasionally to 11 feet, then
subsiding to calm to 2 feet.
.SUNDAY...East winds 20 to 30 knots. Rain showers likely. Waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet.

$$

LSZ264-132000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 AM EDT Wed May 13 2026

.EARLY THIS MORNING...North winds 15 to 25 knots. Waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet.
.TODAY...Northwest winds 10 to 20 knots. Waves subsiding to 1 to
3 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 5 to
15 knots after midnight, then diminishing to less than 10 knots
late. Waves subsiding to calm to 2 feet.
.THURSDAY...East winds less than 10 knots becoming southeast 5 to
15 knots in the afternoon, then increasing to 10 to 20 knots
late. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots veering south
after midnight. Rain showers likely after midnight. Waves
building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. A chance of rain showers through early
afternoon. Waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots becoming west
gales to 35 knots after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...West gales to 35 knots becoming northeast 5 to
15 knots. Waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 20 to 30 knots.
Rain showers likely. Waves building to 3 to 6 feet occasionally
to 8 feet.

$$

LSZ265-132000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 AM EDT Wed May 13 2026

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. A slight
chance of rain. Waves 4 to 7 feet occasionally to 9 feet.
.TODAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Waves subsiding to 2 to 4 feet.
.TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots late. Waves subsiding to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots veering east in the
afternoon, then increasing to 15 to 25 knots late. Waves building
to 2 to 4 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots veering south
after midnight. A chance of rain showers after midnight. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...South winds 20 to 30 knots. A chance of rain showers
through early afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...South winds 20 to 30 knots veering west after
midnight. Waves subsiding to 2 to 4 feet, then building to 3 to
6 feet occasionally to 8 feet.
.SATURDAY...West gales to 40 knots becoming east 5 to 15 knots.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to calm to 2 feet.
.SUNDAY...East winds 15 to 25 knots increasing to 20 to 30 knots.
Rain showers likely. Waves building to 4 to 7 feet occasionally
to 9 feet.

$$

LSZ266-132000-
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-
401 AM EDT Wed May 13 2026

.EARLY THIS MORNING...North winds 20 to 30 knots. A chance of
rain. Waves 4 to 8 feet occasionally to 10 feet.
.TODAY...North winds 20 to 30 knots backing northwest in the
afternoon. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
Waves subsiding to 1 to 3 feet.
.THURSDAY...North winds 5 to 15 knots veering southeast in the
afternoon, then increasing to 10 to 20 knots late. Waves
subsiding to calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 20 to 30 knots becoming south
gales to 35 knots after midnight. A chance of rain showers after
midnight. Waves building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...South gales to 35 knots. Rain showers likely through
early afternoon. Waves building to 6 to 9 feet occasionally to
11 feet.
.FRIDAY NIGHT...South gales to 35 knots becoming southwest 20 to
30 knots after midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet.
.SATURDAY...West gales to 40 knots becoming north 5 to 15 knots.
Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 20 to 30 knots.
Rain showers likely. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.

$$

LSZ267-132000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 AM EDT Wed May 13 2026

.EARLY THIS MORNING...North winds 15 to 25 knots. A chance of
rain. Waves 3 to 6 feet occasionally to 8 feet.
.TODAY...North winds 20 to 30 knots backing northwest in the
afternoon. Patchy fog through early afternoon. A slight chance of
rain through early afternoon. Waves 3 to 6 feet occasionally to
8 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming north 10 to
20 knots after midnight. Waves subsiding to calm to 2 feet.
.THURSDAY...North winds 5 to 15 knots backing northwest in the
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Southeast winds 5 to 15 knots becoming south
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.FRIDAY...South winds 20 to 30 knots. A chance of rain showers
through early afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY NIGHT...South winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...West gales to 35 knots becoming northeast 5 to
15 knots. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots becoming southeast 20 to
30 knots. Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ261-131400-
MAFOR 1309/
Superior West 13700 11600 12500 11100 11200. Waves 2 feet or
less.

Superior North Central 11830 14720 11720 11810 11800. Waves 3 to
5 feet subsiding to 2 to 4 feet today. Waves 1 to 3 feet tonight.

Superior South Central 14740 12730 11720 11810. Waves 4 to 7 feet
subsiding to 3 to 6 feet today. Waves 3 to 5 feet subsiding to 1
to 3 feet tonight.

Superior East 11830 11840 11730 12740 11730 11820 11810. A chance
of rain this morning. Waves 3 to 6 feet today. Waves 3 to 6 feet
subsiding to 2 to 4 feet tonight.

$$

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