Ontonagon to Upper Entrance of Portage Canal MI Marine Forecast

Hourly forecast at zone center

Hourly wind and waves

Gusts peak near 26kts around 4:00 AM, with waves reaching 4.2ft around 4:00 AM.

Sunday, October 11

7:09 AM CDT

Wind forecast

15ktsSSW

Gusts:24kts

Wind forecast: 15 kts; gusts 24 kts. Use left and right arrows to inspect hours; Escape to reset.

Hourly wind speed and gust forecastSustained wind is shown in cyan and gusts in blue-gray. Dashed lines show past conditions. Direction arrows show where the wind is traveling.01020304012AM6AM12PM6PM

Waves Now

3.7ftSW

Period3s

Waves Now: 3.7 ft; period 3 seconds. Use left and right arrows to inspect hours; Escape to reset.

Hourly wave height and period forecastWave height is shown in blue. The dashed line shows past conditions. Direction arrows show where the waves are traveling.024612AM6AM12PM6PM

NOAA marine forecast

Text forecast

Updated 5:00am EDT Oct 11, 2026

Small Craft Advisory In Effect Until 11 Am Edt This Morning

Early This Morning

South wind 15 to 20 knots with gusts up to 29 knots. Clear. Waves 2 to 4 feet.

Today

South wind 10 to 15 knots with gusts up to 26 knots veering southwest 5 to 15 knots with gusts up to 26 knots by late morning, then veering northwest less than 10 knots late. Sunny.

Tonight

Northeast wind 5 to 15 knots increasing to 15 to 25 knots by midnight. Cloudy. A slight chance of showers by midnight. Waves building to 6 to 9 feet occasionally to 11 feet.

Monday

Northeast wind 15 to 25 knots. Cloudy. A chance of showers in the morning, then a slight chance of showers in the afternoon. Waves subsiding to 5 to 8 feet occasionally to 10 feet.

Monday Night

Northeast wind 10 to 20 knots with gusts up to 28 knots. Rain showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.

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Interactive Mapbox map highlighting marine forecast zone LSZ242.