Marine forecast
Munising to Grand Marais, MI
- current wind
- 11 kt N
- Seas
- 3.3 ft
- Period
- 6 sec
- Air
- 53°F
- 72-hr peak
- 35 kt
Observed Tue 1:56 PM | LSZ250
- Seas now
- 3.3 ft · 6 sec
- Air
- 53°F
- 72-hr peak
- 35 kt
- Peak seas
- 19 ft
In brief
At 1:56 pm CDT on Oct 13, 2026, NDBC station KP53 (Munising Lake Shore, MI, 13 miles away) measured wind from the N at 11 kt; buoy 45211 measured seas of 3.3 ft. The NWS forecast for Munising to Grand Marais, 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
Seas forecast · ftPeak 19 ft
NWS marine forecast
| Period | Forecast |
|---|---|
| Rest Of Today | North wind 10 to 15 knots backing northwest late. Cloudy. Waves 2 to 3 feet. |
| Tonight | Northwest wind 10 to 20 knots. Cloudy. Waves building to 2 to 4 feet. |
| Wednesday | Northwest wind 15 to 20 knots. Cloudy. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. |
| Wednesday Night | North wind 10 to 15 knots veering east less than 10 knots after midnight. Mostly cloudy. Waves subsiding to 1 to 2 feet. |
Issued Tue 10:01 AM by Marquette MI (product NSHMQT).
Recent buoy conditions
| Time | Wind | Gust | Seas | Water |
|---|---|---|---|---|
| Tue 1:56 PM | 11 kt N | — | — | — |
| Tue 12:56 PM | 9 kt N | — | — | — |
| Tue 11:56 AM | 8 kt N | — | — | — |
| Tue 10:56 AM | 5 kt N | — | — | — |
| Tue 9:56 AM | 7 kt N | — | — | — |
| Tue 8:56 AM | 6 kt N | — | — | — |
| Tue 7:56 AM | 4 kt N | — | — | — |
| Tue 6:56 AM | 5 kt NNW | — | — | — |
| Tue 5:56 AM | 0 kt | — | — | — |
| Tue 4:56 AM | 0 kt | — | — | — |
| Tue 3:56 AM | 6 kt WNW | — | — | — |
| Tue 2:56 AM | 6 kt | — | — | — |
Observed Tue 1:56 PM at NDBC buoy KP53 (Munising Lake Shore, MI), 13.1 miles away. Seas from buoy 45211 (Grand Island North, MI (268)), 29.0 miles away, at Tue 1:56 PM.
Frequently asked questions
What is the marine forecast for Munising to Grand Marais today?
Rest Of Today: North wind 10 to 15 knots backing northwest late. Cloudy. Waves 2 to 3 feet.
Is there a small craft advisory for Munising to Grand Marais?
No advisories, warnings or watches are in effect for NWS zone LSZ250 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 Munising to Grand Marais right now?
Seas are running 3.3 ft at a 6-second period, measured at NDBC buoy KP53 Tue 1:56 PM, 13.1 miles from this zone. The forecast peaks at 19.0 ft Fri 11 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 LSZ250, 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 KP53, read Tue 1:56 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.