Marine Forecast
Illustrated map of Grand Traverse Bay

Marine forecast

Eagle River to Manitou Island, MI

current wind
9 kt NNE
Seas
2.6 ft
Period
6 sec
Air
46°F
72-hr peak
35 kt

Observed Tue 1:51 PM | LSZ244

Seas now
2.6 ft · 6 sec
Air
46°F
72-hr peak
35 kt
Peak seas
15 ft

In brief

At 1:51 pm CDT on Oct 13, 2026, NDBC station KP59 (Copper Harbor, MI, 4 miles away) measured wind from the NNE at 9 kt; buoy 45023 measured seas of 2.6 ft. The NWS forecast for Eagle River to Manitou Island, MI issued at 10:01 am CDT on Oct 13, 2026 reads, for rest of today: “North wind 10 to 15 knots backing northwest 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 15 ft

0123456789101112131415Wed 14Thu 15Fri 160123456789101112131415Wed 14Thu 15Fri 16
Oct 13-16 | CDT

NWS marine forecast

PeriodForecast
Rest Of TodayNorth wind 10 to 15 knots backing northwest late. Cloudy. Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to 3 feet.
TonightNorthwest wind 10 to 20 knots. Cloudy. Waves subsiding to 1 to 2 feet, then building to 2 to 4 feet.
WednesdayNorthwest wind 15 to 20 knots diminishing to 5 to 15 knots in the afternoon. Mostly cloudy. Waves subsiding to 1 to 2 feet.
Wednesday NightNorth wind less than 10 knots veering southeast after midnight. Partly cloudy. Waves 1 to 2 feet.

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

TimeWindGustSeasWater
Tue 1:51 PM 9 kt NNE — — —
Tue 12:51 PM 10 kt NNE — — —
Tue 11:51 AM 5 kt NE — — —
Tue 10:51 AM 6 kt NE — — —
Tue 9:51 AM 6 kt ENE — — —
Tue 8:51 AM 10 kt E — — —
Tue 7:51 AM 4 kt — — —
Tue 6:51 AM 8 kt E 21 kt — —
Tue 5:51 AM 5 kt E — — —
Tue 4:51 AM 8 kt SE 14 kt — —
Tue 3:51 AM 6 kt 20 kt — —
Tue 2:51 AM 8 kt SE 18 kt — —

Observed Tue 1:51 PM at NDBC buoy KP59 (Copper Harbor, MI), 3.5 miles away. Seas from buoy 45023 (North Entry Buoy, North Keweenaw Peninsula, MI), 33.8 miles away, at Tue 1:40 PM.

What is the marine forecast for Eagle River to Manitou Island today?

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

Is there a small craft advisory for Eagle River to Manitou Island?

No advisories, warnings or watches are in effect for NWS zone LSZ244 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 Eagle River to Manitou Island right now?

Seas are running 2.6 ft at a 6-second period, measured at NDBC buoy KP59 Tue 1:51 PM, 3.5 miles from this zone. The forecast peaks at 15.0 ft Fri 9 AM.

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 LSZ244, 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 KP59, read Tue 1:51 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.