Marine Forecast
Illustrated map of Grand Traverse Bay

Marine forecast

Upper Entrance of Portage Canal–Eagle River

current wind
6 kt N
Gusts
10 kt
Seas
2.6 ft
Period
6 sec
Air
46°F

Observed Tue 1:40 PM | LSZ243

Gusts now
10 kt
Seas now
2.6 ft · 6 sec
Air
46°F
Water
43°F
72-hr peak
35 kt

In brief

At 1:40 pm CDT on Oct 13, 2026, NDBC station 45023 (North Entry Buoy, North Keweenaw Peninsula, MI, 9 miles away) measured wind from the N at 6 kt, gusting to 10 kt, with seas of 2.6 ft. The NWS forecast for Upper Entrance of Portage Canal–Eagle River, MI issued at 10:01 am CDT on Oct 13, 2026 reads, for rest of today: “North wind 10 to 15 knots backing northwest less than 10 knots late. Cloudy.”

Source: National Weather Service Marquette MI forecast; NDBC observations

Wind forecast · ktPeak 35 kt

05101520253035404550Wed 14Thu 15Fri 1605101520253035404550Wed 14Thu 15Fri 16
Sustained GustOct 13-16 | CDT

Seas forecast · ftPeak 11 ft

01234567891011Wed 14Thu 15Fri 1601234567891011Wed 14Thu 15Fri 16
Oct 13-16 | CDT

NWS marine forecast

PeriodForecast
Rest Of TodayNorth wind 10 to 15 knots backing northwest less than 10 knots late. Cloudy. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 3 feet.
TonightNorthwest wind 10 to 20 knots becoming 15 to 20 knots late. Cloudy. Waves subsiding to 1 to 2 feet, then building to 2 to 3 feet.
WednesdayNorthwest wind 5 to 15 knots. Mostly cloudy. Waves subsiding to 1 to 2 feet.
Wednesday NightVariable wind less than 10 knots becoming southeast less than 10 knots after midnight. Mostly cloudy in the evening then becoming partly cloudy. Waves calm to 1 foot.

Issued Tue 10:01 AM by Marquette MI (product NSHMQT).

TimeWindGustSeasWater
Tue 1:40 PM 6 kt N 10 kt 2.6 ft 43°F
Tue 12:40 PM 8 kt NNE 12 kt 2.6 ft 42°F
Tue 11:40 AM 6 kt ENE 8 kt 3.0 ft 43°F
Tue 10:40 AM 6 kt ENE 8 kt 3.0 ft 43°F
Tue 9:40 AM 6 kt ENE 8 kt 3.0 ft 43°F
Tue 8:40 AM 12 kt E 14 kt 3.0 ft 43°F
Tue 7:40 AM 16 kt E 21 kt 3.3 ft 44°F
Tue 6:40 AM 16 kt E 19 kt 3.6 ft 44°F
Tue 5:40 AM 18 kt E 23 kt 3.9 ft 45°F
Tue 4:40 AM 14 kt E 18 kt 3.6 ft 46°F
Tue 3:40 AM 12 kt E 16 kt 3.9 ft 47°F
Tue 2:40 AM 12 kt E 16 kt 3.9 ft 46°F

Observed Tue 1:40 PM at NDBC buoy 45023 (North Entry Buoy, North Keweenaw Peninsula, MI), 9.1 miles away.

What is the marine forecast for Upper Entrance of Portage Canal–Eagle River today?

Rest Of Today: North wind 10 to 15 knots backing northwest less than 10 knots late. Cloudy. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 3 feet.

Is there a small craft advisory for Upper Entrance of Portage Canal–Eagle River?

No advisories, warnings or watches are in effect for NWS zone LSZ243 as of the last update on this page. Advisories can be issued at any time; check the current bulletin before leaving the dock.

How high are the waves at Upper Entrance of Portage Canal–Eagle River right now?

Seas are running 2.6 ft at a 6-second period, measured at NDBC buoy 45023 Tue 1:40 PM, 9.1 miles from this zone. The forecast peaks at 11.0 ft Fri 7 AM.

What is the water temperature at Upper Entrance of Portage Canal–Eagle River?

The nearest buoy read 43°F (6°C) at Tue 1:40 PM. Sea surface temperature at a single buoy can differ by several degrees from the water at a beach or in a shallow bay nearby.

What do the wind speeds in knots mean?

One knot is 1.15 mph. The National Weather Service issues a small craft advisory for sustained winds of roughly 22–33 knots or hazardous seas, a gale warning at 34–47 knots, and a storm warning at 48 knots and above. Exact advisory thresholds vary by forecast office and by water body — a bay reaches dangerous chop at a lower wind speed than open ocean.

Where does this forecast come from?

The forecast text is the National Weather Service's own marine bulletin for zone LSZ243, issued by Marquette MI, reproduced in full. The wind and seas charts are drawn from the NWS gridded forecast for a point inside the zone. Observations come from the nearest reporting NDBC buoy. We are not affiliated with NOAA or the National Weather Service.

Forecast: NOAA/NWS product NSHMQT, issued Tue 10:01 AM. Observations: NOAA National Data Buoy Center station 45023, read Tue 1:40 PM. Retrieved Oct 13, 2:42 PM. Conditions offshore change faster than any page can be rebuilt, so check the current NWS bulletin and your own instruments before going out.