Marine forecast
Portage Lake–Huron Is.–Portage Canal, MI
- current wind
- 6 kt N
- Gusts
- 10 kt
- Seas
- 3.3 ft
- Air
- 50°F
- Water
- 56°F
Observed Tue 12:00 PM | LSZ247
- Gusts now
- 10 kt
- Seas now
- 3.3 ft
- Air
- 50°F
- Water
- 56°F
- 72-hr peak
- 27 kt
In brief
At 12:00 pm CDT on Oct 13, 2026, NDBC station 45025 (South Entry Buoy, South Keweenaw Peninsula, MI, 6 miles away) measured wind from the N at 6 kt, gusting to 10 kt, with seas of 3.3 ft. The NWS forecast for Portage Lake–Huron Is.–Portage Canal, 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 27 kt
Seas forecast · ftPeak 4 ft
NWS marine forecast
| Period | Forecast |
|---|---|
| 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. |
| Tonight | West wind 5 to 15 knots veering northwest 10 to 15 knots late. Gusts up to 23 knots. Cloudy. Waves subsiding to 1 to 2 feet. |
| Wednesday | Northwest wind 5 to 15 knots with gusts up to 23 knots. Mostly cloudy. Waves 1 to 2 feet. |
| Wednesday Night | Variable wind less than 10 knots becoming southeast less than 10 knots after midnight. Mostly 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 12:00 PM | 6 kt N | 10 kt | 3.3 ft | 56°F |
| Tue 11:40 AM | 8 kt N | 10 kt | 3.6 ft | 56°F |
| Tue 10:40 AM | 8 kt N | 10 kt | 3.6 ft | 56°F |
| Tue 9:40 AM | 10 kt NNE | 16 kt | 3.6 ft | 56°F |
| Tue 8:40 AM | 16 kt ENE | 19 kt | 3.9 ft | 56°F |
| Tue 7:40 AM | 18 kt ENE | 23 kt | 4.3 ft | 56°F |
| Tue 6:40 AM | 12 kt E | 16 kt | 4.6 ft | 56°F |
| Tue 5:40 AM | 12 kt E | 16 kt | 5.2 ft | 56°F |
| Tue 4:40 AM | 14 kt E | 18 kt | 5.2 ft | 56°F |
| Tue 3:40 AM | 14 kt E | 19 kt | 5.2 ft | 56°F |
| Tue 2:40 AM | 18 kt E | 23 kt | 5.9 ft | 56°F |
| Tue 1:40 AM | 18 kt E | 25 kt | 5.9 ft | 56°F |
Observed Tue 12:00 PM at NDBC buoy 45025 (South Entry Buoy, South Keweenaw Peninsula, MI), 6.0 miles away.
Frequently asked questions
What is the marine forecast for Portage Lake–Huron Is.–Portage Canal 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 Portage Lake–Huron Is.–Portage Canal?
No advisories, warnings or watches are in effect for NWS zone LSZ247 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 Portage Lake–Huron Is.–Portage Canal right now?
Seas are running 3.3 ft, measured at NDBC buoy 45025 Tue 12:00 PM, 6.0 miles from this zone. The forecast peaks at 4.0 ft Fri 6 AM.
What is the water temperature at Portage Lake–Huron Is.–Portage Canal?
The nearest buoy read 56°F (13°C) at Tue 12:00 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 LSZ247, 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 45025, read Tue 12:00 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.