Marine Weather and Tide Forecast for Mackinaw City, MI

DISCUSSION
Issued at 213 PM EDT Sat May 30 2026

Pattern Synopsis/Forecast: Amplified upper-level pattern remains in place through midweek across NOAM. Northern MI continues to find itself in the vicinity of the trough/ridge interface, favoring subsidence aloft and reinforcing Canadian-originated surface high pressure sagging into the western Great Lakes. Latest trends favor this pattern beginning to break down toward the middle and end of this coming week with downstream troughing exiting out over the Atlantic and upstream ridging trekking east into the Great Lakes. Pattern eventually becomes more zonal across the northern tier of the CONUS toward next weekend.

Forecast Details: Little in the way of sensible weather is anticipated through at least midweek across northern MI with mostly sunny skies and seasonable temperatures. Primary focus through Wednesday will likely be continued fire weather concerns with antecedent dry conditions, low afternoon humidity and occasional breeziness. High temperatures Sunday through Tuesday largely in the 70s to low 80s area-wide.

Slow upward temperature trend anticipated Wednesday-Thursday as aforementioned ridging folds overhead. Wednesday's highs in the upper 70s to mid 80s away from the lakeshores with the warmest day of the week likely Thursday with lots of mid-upper 80s for northern lower and upper 70s to low 80s north of the bridge. Fire weather issues may persist through this time frame as well. Low PoPs eventually reenter the forecast later Thursday through next weekend, but despite that, still think we'll be hard pressed to see any widespread meaningful rainfall.

AVIATION /00Z TAFS THROUGH 00Z SUNDAY/
Issued at 709 PM EDT Sat May 30 2026

VFR through the forecast period. Winds turn light and variable this evening into tonight. Westerly winds pick back up again through Sunday morning, gusting 15kts+ in places by afternoon.
Lake breeze processes will turn winds NW at TVC and CIU, and N to NNE at APN. Winds subside toward the end of the forecast period into Sunday night.

APX WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...None.