Marine forecast
Black River To Ontonagon, MI
- current wind
- 5 kt N
- Gusts
- 8 kt
- Seas
- 2.6 ft
- Period
- 6 sec
- Air
- 48°F
Observed Tue 1:50 PM | LSZ241
- Gusts now
- 8 kt
- Seas now
- 2.6 ft · 6 sec
- Air
- 48°F
- 72-hr peak
- 35 kt
- Peak seas
- 12 ft
In brief
At 1:50 pm CDT on Oct 13, 2026, NDBC station OTNM4 (Ontonagon, MI, 18 miles away) measured wind from the N at 5 kt, gusting to 8 kt; buoy 45023 measured seas of 2.6 ft. The NWS forecast for Black River To Ontonagon, MI issued at 10:01 am CDT on Oct 13, 2026 reads, for rest of today: “North wind 5 to 15 knots backing west less than 10 knots late. Cloudy.”
Source: National Weather Service Marquette MI forecast; NDBC observations
Wind forecast · ktPeak 35 kt
Seas forecast · ftPeak 12 ft
NWS marine forecast
| Period | Forecast |
|---|---|
| Rest Of Today | North wind 5 to 15 knots backing west less than 10 knots late. Cloudy. Waves 3 to 6 feet occasionally to 8 feet subsiding to 2 to 3 feet. |
| Tonight | West wind less than 10 knots veering northwest 10 to 15 knots by midnight. Mostly cloudy. Waves subsiding to 1 to 2 feet, then building to 2 to 3 feet. |
| Wednesday | Northwest wind 10 to 15 knots diminishing to less than 10 knots in the afternoon. Mostly cloudy. Waves subsiding to 1 to 2 feet. |
| Wednesday Night | Variable 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).
Recent buoy conditions
| Time | Wind | Gust | Seas | Water |
|---|---|---|---|---|
| Tue 1:50 PM | 5 kt N | 8 kt | — | — |
| Tue 12:50 PM | 6 kt NE | 9 kt | — | — |
| Tue 11:50 AM | 8 kt NE | 12 kt | — | — |
| Tue 10:50 AM | 7 kt NE | 11 kt | — | — |
| Tue 9:50 AM | 9 kt NNE | 13 kt | — | — |
| Tue 8:50 AM | 7 kt ENE | 11 kt | — | — |
| Tue 7:50 AM | 10 kt ENE | 16 kt | — | — |
| Tue 6:50 AM | 9 kt ENE | 14 kt | — | — |
| Tue 5:50 AM | 7 kt NE | 16 kt | — | — |
| Tue 4:50 AM | 7 kt NE | 12 kt | — | — |
| Tue 3:50 AM | 6 kt ENE | 9 kt | — | — |
| Tue 2:50 AM | 2 kt E | 4 kt | — | — |
Observed Tue 1:50 PM at NDBC buoy OTNM4 (Ontonagon, MI), 18.4 miles away. Seas from buoy 45023 (North Entry Buoy, North Keweenaw Peninsula, MI), 60.3 miles away, at Tue 1:40 PM.
Frequently asked questions
What is the marine forecast for Black River To Ontonagon today?
Rest Of Today: North wind 5 to 15 knots backing west less than 10 knots late. Cloudy. Waves 3 to 6 feet occasionally to 8 feet subsiding to 2 to 3 feet.
Is there a small craft advisory for Black River To Ontonagon?
No advisories, warnings or watches are in effect for NWS zone LSZ241 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 Black River To Ontonagon right now?
Seas are running 2.6 ft at a 6-second period, measured at NDBC buoy OTNM4 Tue 1:50 PM, 18.4 miles from this zone. The forecast peaks at 12.0 ft Fri 8 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 LSZ241, 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 OTNM4, read Tue 1:50 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.