Michigan · live outlook · refreshes every 3 h

Michigan sap flow forecast

The next several days for Michigan's sugaring country, read the way a sugarmaker reads them: how cold the night gets, how warm the afternoon gets, and whether that adds up to a run.

Michigan highlighted on a map of the maple belt, with its forecast towns (Stephenson, Boyne City) marked — Michigan in the maple beltDots: Stephenson · Boyne City

Season opens: Mar 5; typical
Closes: Apr 7; typical

115 days to the usual opening. When to tap in Michigan

Stephenson · Menominee County in the Upper Peninsula has the most taps in Michigan, 45,900 (2022 Census of Agriculture).

Forecast for Stephenson

Updated Nov 10, 7:07 AM EST

3 sap days in the next 6

freeze thaw 32°F

WedNov 11
35° / 46°
0h below · 24h above
No refreeze forecast
Low of 35°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
ThuNov 12
34° / 39°
0h below · 21h above
No refreeze forecast
Low of 34°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
FriNov 13
32° / 40°
4h below · 12h above
No refreeze forecast
Low of 32°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
SatNov 14
24° / 42°
13h below · 10h above
Classic sap day
Low 24°F, high 42°F — nights in the 20s and days in the 40s: the textbook sap day.
SunNov 15
24° / 45°
12h below · 12h above
Classic sap day
Low 24°F, high 45°F — nights in the 20s and days in the 40s: the textbook sap day.
MonNov 16
27° / 48°
Classic sap day
Low 27°F, high 48°F — nights in the 20s and days in the 40s: the textbook sap day.

Data: National Weather Service. Verdicts use freeze-thaw thresholds from maple field research; your woods may run a little differently.

Boyne City · Charlevoix County made the most syrup of any Michigan county with published figures, 19,405 gallons (2022 Census of Agriculture).

Forecast for Boyne City

Updated Nov 10, 8:41 AM EST

1 sap day in the next 6

freeze thaw 32°F

WedNov 11
36° / 45°
0h below · 24h above
No refreeze forecast
Low of 36°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
ThuNov 12
34° / 37°
0h below · 24h above
No refreeze forecast
Low of 34°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
FriNov 13
29° / 40°
6h below · 15h above
Classic sap day
Low 29°F, high 40°F — nights in the 20s and days in the 40s: the textbook sap day.
SatNov 14
31° / 41°
7h below · 16h above
Maybe a light run
Only a light freeze (31°F). Branches may not freeze hard enough for a strong run.
SunNov 15
32° / 43°
0h below · 17h above
No refreeze forecast
Low of 32°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
MonNov 16
33° / 45°
No refreeze forecast
Low of 33°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.

Data: National Weather Service. Verdicts use freeze-thaw thresholds from maple field research; your woods may run a little differently.

Your exact spot

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Your sugarbush, your forecast

Hourly temperatures for your exact spot, turned into a day-by-day sap-run outlook. US and Canada.

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Data & method · 4

1.National Weather Service API · NOAA National Weather Service
2.Sap flow in sugar maple: timing and weather drivers (Frontiers in Agronomy, 2025) · de Lima Santos et al.
3.Maple Sugaring Tips for Beginners and Backyard Maple Sugar Producers · UNH Extension
4.North American Maple Syrup Producers Manual, 2nd ed. (Bulletin 856) · The Ohio State University Extension

LuckySap · free on iPhone & Android

Never miss the first run

LuckySap can ping you the evening before a strong sap day, then keeps your collections, sugar readings and boils in one season log. Free on iPhone and Android.