Marine forecast
St. Marys River Pt. Iroquois–E. Potagannissing Bay
- current wind
- 7 kt NW
- Gusts
- 8 kt
- Water
- 57°F
- 72-hr peak
- 25 kt
- Peak seas
- 1 ft
Observed Tue 2:00 PM | LSZ322
- Gusts now
- 8 kt
- Water
- 57°F
- 72-hr peak
- 25 kt
- Peak seas
- 1 ft
In brief
At 2:00 pm CDT on Oct 13, 2026, NDBC station RCKM4 (Rock Cut, MI, 4 miles away) measured wind from the NW at 7 kt, gusting to 8 kt. The NWS forecast for St. Marys River Pt. Iroquois–E. Potagannissing Bay, MI issued at 1:51 pm CDT on Oct 13, 2026 reads, for through early evening: “North wind 10 to 15 knots. Cloudy.”
Source: National Weather Service Gaylord MI forecast; NDBC observations
Wind forecast · ktPeak 25 kt
Seas forecast · ftPeak 1 ft
NWS marine forecast
| Period | Forecast |
|---|---|
| Through Early Evening | North wind 10 to 15 knots. Cloudy. |
| Tonight | Northwest wind 15 to 20 knots. Slight chance of showers. |
| Wednesday | Northwest wind 15 to 20 knots. Mostly cloudy. |
| Wednesday Night | Northeast wind 5 to 10 knots. Mostly cloudy. |
| Thursday | Southeast wind 5 to 10 knots. Mostly cloudy. See the open lakes forecast for days 3 through 5. |
Issued Tue 1:51 PM by Gaylord MI (product NSHAPX).
Recent buoy conditions
| Time | Wind | Gust | Seas | Water |
|---|---|---|---|---|
| Tue 2:00 PM | 7 kt NW | 8 kt | — | 57°F |
| Tue 1:54 PM | 7 kt NNW | 8 kt | — | 57°F |
| Tue 12:54 PM | 3 kt N | 5 kt | — | 57°F |
| Tue 11:54 AM | 1 kt N | 3 kt | — | 57°F |
| Tue 10:54 AM | 5 kt ENE | 9 kt | — | 57°F |
| Tue 9:54 AM | 6 kt E | 10 kt | — | 57°F |
| Tue 8:54 AM | 6 kt ENE | 10 kt | — | 57°F |
| Tue 7:54 AM | 5 kt ENE | 9 kt | — | 57°F |
| Tue 6:54 AM | 10 kt ESE | 13 kt | — | 58°F |
| Tue 5:54 AM | 11 kt E | 13 kt | — | 58°F |
| Tue 4:54 AM | 6 kt E | 8 kt | — | 58°F |
| Tue 3:54 AM | 6 kt ENE | 8 kt | — | 58°F |
Observed Tue 2:00 PM at NDBC buoy RCKM4 (Rock Cut, MI), 4.4 miles away.
Frequently asked questions
What is the marine forecast for St. Marys River Pt. Iroquois–E. Potagannissing Bay today?
Through Early Evening: North wind 10 to 15 knots. Cloudy.
Is there a small craft advisory for St. Marys River Pt. Iroquois–E. Potagannissing Bay?
No advisories, warnings or watches are in effect for NWS zone LSZ322 as of the last update on this page. Advisories can be issued at any time; check the current bulletin before leaving the dock.
What is the water temperature at St. Marys River Pt. Iroquois–E. Potagannissing Bay?
The nearest buoy read 57°F (14°C) at Tue 2:00 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 LSZ322, issued by Gaylord 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 NSHAPX, issued Tue 1:51 PM. Observations: NOAA National Data Buoy Center station RCKM4, read Tue 2:00 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.