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FZUS63 KDTX 170803
GLFLH

Open Lake Forecast for Lake Huron
National Weather Service Detroit/Pontiac MI
403 AM EDT Fri Oct 17 2025

For waters beyond five nautical miles off shore on Lake Huron

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 will wash out into the west Atlantic
through the end of the week while a low pressure system moves
from the northern Plains into west Ontario. This will strengthen
the pressure gradient over the Great Lakes, increasing wind
speeds through the afternoon and evening. Low pressure, 29.20
inches, will then rapidly develop and move over Michigan Sunday,
bringing increasing potential to see gales for a greater portion
of the region.

LHZ361-171615-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
403 AM EDT Fri Oct 17 2025

.TODAY...South winds 10 to 15 knots increasing to 15 to 20 knots
in the afternoon. Showers in the morning. Waves 1 to 3 feet
building to 5 to 7 feet. Waves occasionally around 10 feet.
.TONIGHT...South winds 15 to 20 knots decreasing to 10 to
15 knots early in the morning. A chance of showers. Waves 5 to
7 feet. Waves occasionally around 10 feet.
.SATURDAY...South winds 10 to 15 knots becoming southwest 5 to
10 knots early in the afternoon. Showers. Waves 4 to 6 feet.
Waves occasionally around 8 feet.
.SATURDAY NIGHT...South winds 5 to 10 knots backing to the
southeast after midnight. Showers likely in the evening...then
showers after midnight. Waves 2 to 4 feet subsiding to 1 to
3 feet after midnight.
.SUNDAY...North winds 10 to 15 knots becoming northwest 15 to
20 knots with gusts to 35 knot gales late in the morning...then
increasing to 20 to 25 knots with gusts to 35 knot gales late in
the afternoon decreasing to 15 to 20 knots with gusts to around
30 knots late in the evening. Showers in the morning...then
showers likely late in the morning. Waves 2 to 4 feet building to
8 to 12 feet. Waves occasionally around 15 feet.
.MONDAY...West winds 10 to 15 knots backing to the south early in
the evening...then increasing to 15 to 20 knots in the late
evening and early morning. Showers likely in the late evening and
early morning. Waves 4 to 6 feet subsiding to 2 to 4 feet. Waves
occasionally around 8 feet.
.TUESDAY...South winds 15 to 20 knots with gusts to 35 knot gales
becoming southwest 20 to 25 knots with gusts to 35 knot gales
early in the evening...then veering to the northwest with gusts
to around 30 knots in the late evening and early morning. Showers
likely early in the morning...then showers until early evening. A
chance of showers in the late evening and early morning. Waves
4 to 6 feet building to 8 to 12 feet. Waves occasionally around
15 feet.


$$

LHZ362-363-171615-
Lake Huron from Presque Isle Light to Sturgeon Point MI beyond
5NM off shore-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off
shore-
403 AM EDT Fri Oct 17 2025

.TODAY...South winds 10 to 15 knots increasing to 20 to 25 knots
with gusts to around 30 knots. Showers in the morning. Waves 1 to
3 feet building to 6 to 9 feet. Waves occasionally around
12 feet.
.TONIGHT...South winds 20 to 25 knots. Gusts to 30 knots late in
the evening then 30 knots early in the morning. Waves 6 to
9 feet. Waves occasionally around 12 feet.
.SATURDAY...South winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late morning and
afternoon. Showers likely in the morning...then showers in the
afternoon. Waves 8 to 12 feet. Waves occasionally around 15 feet.
.SATURDAY NIGHT...South winds 10 to 15 knots. Showers. Waves 4 to
6 feet. Waves occasionally around 8 feet.
.SUNDAY...Southeast winds 10 to 15 knots becoming south 20 to
25 knots with gusts to 35 knot gales late in the morning...then
becoming west to 30 knots with gusts to 35 knot gales late in the
afternoon becoming northwest 20 to 25 knots with gusts to 35 knot
gales late in the evening. Showers...then a chance of showers
late in the afternoon. Waves 5 to 7 feet building to 10 to
14 feet. Waves occasionally around 18 feet.
.MONDAY...West winds 15 to 20 knots backing to the south until
early morning. Showers likely in the late evening and early
morning. Waves 8 to 12 feet subsiding to 4 to 6 feet until early
morning. Waves occasionally around 15 feet.
.TUESDAY...South winds 20 to 25 knots with gusts to 35 knot gales
becoming southwest to 30 knots with gusts to 35 knot gales early
in the evening...then becoming west 20 to 25 knots with gusts to
around 30 knots in the late evening and early morning. Showers
likely until afternoon...then showers early in the evening. Rain
showers likely in the late evening and early morning. Waves 6 to
9 feet building to 10 to 14 feet. Waves occasionally around
18 feet.


$$

LHZ462>464-171615-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
403 AM EDT Fri Oct 17 2025

.TODAY...South winds 5 to 10 knots increasing to 15 to 20 knots.
Showers likely in the morning. Waves 2 feet or less building to
2 to 4 feet in the afternoon.
.TONIGHT...South winds 15 to 20 knots increasing to 20 to
25 knots early in the morning. Waves 5 to 7 feet. Waves
occasionally around 10 feet.
.SATURDAY...South winds 20 to 25 knots decreasing to 15 to
20 knots in the late morning and afternoon. A chance of showers
in the morning...then showers likely in the afternoon. Waves 5 to
7 feet. Waves occasionally around 10 feet.
.SATURDAY NIGHT...South winds 10 to 15 knots increasing to 15 to
20 knots after midnight. Showers likely and a chance of
thunderstorms in the evening...then showers and a chance of
thunderstorms after midnight. Waves 3 to 5 feet.
.SUNDAY...South winds 15 to 20 knots increasing to 20 to 25 knots
with gusts to around 30 knots late in the morning...then veering
to the northwest with gusts to 35 knot gales late in the
afternoon. Showers. Rain showers likely late in the evening.
Waves 5 to 7 feet building to 10 to 14 feet. Waves occasionally
around 18 feet.
.MONDAY...Northwest winds 20 to 25 knots becoming west 15 to
20 knots in the late morning and early afternoon...then backing
to the southwest early in the evening backing to the south in the
late evening and early morning. Showers likely in the late
evening and early morning. Waves 8 to 12 feet subsiding to 3 to
5 feet until early morning. Waves occasionally around 15 feet.
.TUESDAY...South winds 20 to 25 knots with gusts to 35 knot gales
becoming southwest to 30 knots with gusts to 35 knot gales early
in the evening...then becoming west 20 to 25 knots with gusts to
around 30 knots in the late evening and early morning. Showers
likely. Waves 6 to 9 feet building to 10 to 14 feet until early
morning. Waves occasionally around 18 feet.


$$

LHZ461-171615-
MAFOR 1709/
HURON NORTH 11406 11416 11426 14430 11430. Waves 2 feet or
less building to 3 to 5 feet...THEN building to 5 to 7 feet.
Occasional wave height around 10 feet today. Waves 6 to 9 feet.
Occasional wave height around 12 feet tonight.

HURON SOUTH 11400 12416 12420 13430. Waves 1 to 3 feet
building to 3 to 5 feet today. Waves 4 to 6 feet tonight.

$$

AA

Experimental modernized open lake forecast is available online at
weather.gov/dtx/glftable (all lower case)

Graphical marine forecasts are available online at
weather.gov/greatlakes (all lower case)