Marine Weather and Tide Forecast for Superior, WI

DISCUSSION
Issued at 139 PM CDT Tue Aug 4 2026

Northwesterly flow is bringing a classic August fall teaser today, with breezy winds, a broken altocumulus cloud deck, and dewpoints in the 50s. Even lower dewpoints in the 40s are expected overnight into Wednesday morning, which will likely make for a relatively chilly night tonight. Expect overnight lows in the 40s for most, except right along Lake Superior.

Rinse and repeat tomorrow with a westerly breeze in the afternoon, lower dewpoints, and high temperatures in the 70s.

A little wiggle in the upper level flow Thursday should allow for some moisture and warmth advection back into the area, with dewpoints in the mid to upper 50s and temperatures rising into the 80s. That impulse could also lead to some scattered showers and thunderstorms late Thursday through Friday.

We expect to stay under broad upper level troughing into next week which will keep us on the slightly cooler side. Any upper level shortwaves that move through could bring some passing precipitation chances.

AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/
Issued at 1142 AM CDT Tue Aug 4 2026

Largely VFR conditions are expected through the TAF period.
Scattered MVFR cumulus are expected today, which could verge on broken coverage at times. Expect gusty west to northwest winds through this afternoon, and then a clearing of skies and calming of winds overnight. There is a slight chance for some fog at HYR overnight, but confidence is not high enough to include in the TAF at this time. West to southwest winds are expected Wednesday.

MARINE /FOR NEARSHORE WATERS OF WESTERN LAKE SUPERIOR/
Issued at 139 PM CDT Tue Aug 4 2026

Southwesterly winds are expected today and Wednesday, with some afternoon gusts up to 15 knots possible. Slightly stronger southwest winds are possible Thursday with some gusts of 20-25 knots possible - a Small Craft Advisory may be needed. No precipitation is expected until the end of the week.

For the open water discussion, refer to the NWS Marquette Area Forecast Discussion at weather.gov/mqt.

FIRE WEATHER
Issued at 139 PM CDT Tue Aug 4 2026

Drier weather continues for today and tomorrow. Wednesday, dewpoints in the 40s will make for a noticeably dry day with afternoon RH falling to around 30%. Expect breezy afternoon conditions with west winds gusting 15-20mph. A little more moisture returns Thu-Fri but afternoon RH may still fall into the 35-40% range. Strong southwest winds are possible Thursday, sustained 10-15mph with gusts up to 25mph. There could be some scattered rain showers and thunderstorms late Thursday into Friday, possibly continuing through the weekend.

See the Fire Weather Forecast product for a more thorough breakdown of fire weather conditions.

DLH WATCHES/WARNINGS/ADVISORIES
MN...None.
WI...None.
MARINE...None.