Marine Weather and Tide Forecast for Charlevoix, MI

DISCUSSION
Issued at 240 PM EDT Sun Sep 20 2026

Drier air will continue to push into the area from the north today as Canadian high pressure gradually builds into the Great Lakes, with a mix of sun and clouds expected for the remainder of the day. This will usher in a relatively benign stretch of weather across northern Michigan, with high pressure largely keeping the better rain chances west and south of the area through much of the upcoming week. Northeast will be breezy at times through this afternoon/evening and again Monday as cooler air settles south across the Great Lakes, with Monday shaping up to be the coolest day of the period. Highs Monday will generally be in the mid 50s to low 60s. Cooler temperatures tonight will bring some potential for patchy frost across interior eastern Upper, especially in areas that see lighter winds. Another chilly night is expected Monday night, with temperatures again falling into the 30s across many interior locations bringing the potential for some patchy frost yet again... Frost potential for both nights will depend on how much winds diminish overnight, with the best chances occurring where winds are able to decouple.

Temperatures will then gradually moderate through the reminder of the week as the surface high slowly shifts east and weak return flow allows milder air to work back into Northern Michigan. Much of the week looks dry, with mostly clear to partly cloudy skies and seasonably cool temperatures early before the aformentioned gradual slight warmup into the 60s and possibly low 70s occurs by late week. Rain chances remain minimal through the period, with the next more meaningful opportunity for precipitation potentially arriving next weekend or early the following next week, though there is still considerable uncertainty with the timing and evolution of that potential at this range.



AVIATION /18Z TAFS THROUGH 18Z MONDAY/
Issued at 121 PM EDT Sun Sep 20 2026

Lingering MVFR ceilings should lift to VFR and persist through the issuance period. Breezy northeast winds look to continue occassionally producing gusts 15-20 kts, especially across northern Lower terminals. Cloud cover will increase south to north late tonight.

APX WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...Small Craft Advisory until 2 AM EDT Monday for LHZ345.
Small Craft Advisory until 8 AM EDT Monday for LHZ346-347.
Small Craft Advisory until 8 PM EDT Monday for LHZ348-349.
Small Craft Advisory until 2 AM EDT Monday for LMZ323-341-342- 344>346.