1. The tree freezes
Cold air helps reset internal stem pressures. Nights below 32°F, especially into the 20s, can precede useful sap-flow conditions.
01 / Maple timing
Your local sap-run outlook
Choose a Michigan forecast point. Index values describe weather conditions only; sap flow and budding must be checked at the tree.
LoadingChecking weather
Checking the season
Loading seasonal guidance.
Sugar maple: check bud development before collecting.
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No run forecast available yet
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0–100 heuristic, not flow probability
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Complete days analyzed
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Model weather window, not tree observations
What we can and cannot tell: NWS air temperatures help identify favorable freeze/thaw windows. We do not have sensors in Michigan trees; no score is a live sap-flow measurement, yield forecast, guarantee of safe tapping, or proof a sugarhouse is boiling today.
02 / Statewide view
Michigan maple weather map
Tap a dot to examine its seven-day local outlook. The map shows model points, not countywide actual sap flow.
Map unavailable. Use the location menu and statewide list instead.
FavorablePossibleLow / insufficientOff season
03 / Plan collection
Next seven days
Hourly NWS temperatures, evaluated against the prior overnight freeze.
Checking the season…
Scores favor cold nights followed by above-freezing daytime hours. Forecast highs, lows and opportunity values are approximations of the hours available; the first incomplete day is not scored.
04 / Compare Michigan
Regional sap weather board
Sampled forecast points from southeast Michigan to the Upper Peninsula. Choose a city to open its complete local forecast.
Loading regional locations…
Each region is a forecast sample, not a report of actual sap running.
05 / Go experience it
Visit a Michigan sugarhouse
Actual maple festivals, educational sugarbushes and maple-making demonstrations. Dates marked “2027 confirmed” come from the organizer. Other venues have hosted programs but have not yet posted 2027 dates.
Visiting a farm without a scheduled event may not be permitted. Verify hours, fees, accessibility and reservations on the organizer website before traveling. 2026 events are not automatically relabeled as 2027.
Michigan Maple Weekend: The Michigan Maple Syrup Association organized regional sugarhouse weekends in 2026. The 2027 statewide weekend schedule is not yet confirmed here; check its official website.
06 / Understand the weather
What makes sap run?
2. The tree thaws
Above-freezing daytime temperatures, often in the 40s, can generate positive pressure that moves sap through the tap hole.
3. The season eventually ends
Watch buds and tree health. Consecutive warm days and bud expansion can end quality syrup collection even when another freeze occurs.
Science references: Cornell Cooperative Extension · MSU Extension · University of Wisconsin Extension.
07 / Frequently asked
Michigan maple syrup timing questions
When does maple sap run in Michigan?
Most Michigan tapping activity is in late winter and early spring. Southern Lower Michigan often starts before the north; the Upper Peninsula can continue later. Some years bring earlier warm spells, so there is no reliable single start date for every property.
What temperatures make maple sap run?
A night below freezing followed by a day above freezing is a familiar favorable pattern. Temperatures in the 20s overnight and around the 40s in daytime are often useful, though moisture, tree dormancy and site conditions matter.
Does the map show actual sap flow?
No. It summarizes hourly NWS forecast conditions. Neither a “favorable” marker nor an index score is confirmation that a specific tree or sugarhouse has flowing sap. The site currently has no direct sap sensors or producer reports.
Where can I watch maple syrup being made in Michigan?
Public maple programs have been offered at Maple Row Sugarhouse near Jones, Chippewa Nature Center in Midland, Blandford Nature Center in Grand Rapids and MSU Tollgate Farm in Novi. Shepherd has a multi-day festival. Follow the listed organizer for confirmed dates, tours and admission.
How late can I collect maple sap?
Collection should stop when tree buds begin expanding or sap develops off flavors. Conditions differ by species and by location, and some red maples bud earlier. A weather model cannot observe the bud stage of your trees.
Can I tap a maple tree in October?
The traditional Michigan sugaring season is late winter into early spring. October is outside the modeled tapping window; this site deliberately marks fall and summer as off season rather than showing misleading daily sap-flow ratings.