Massachusetts · live outlook · refreshes every 3 h

Massachusetts sap flow forecast

The next several days for Massachusetts' 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.

Massachusetts highlighted on a map of the maple belt, with its forecast towns (Ashfield, Worthington) marked — Massachusetts in the maple beltDots: Ashfield · Worthington

Season opens: Feb 24; typical
Closes: Apr 3; typical

106 days to the usual opening. When to tap in Massachusetts

Ashfield · Franklin County has 101,339 of Massachusetts' 255,805 taps (39.6%), the most in the state (2022 Census of Agriculture).

Forecast for Ashfield

Updated Nov 10, 4:13 AM EST

1 sap day in the next 6

freeze thaw 32°F

WedNov 11
39° / 51°
0h below · 24h above
No refreeze forecast
Low of 39°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
ThuNov 12
35° / 45°
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.
FriNov 13
34° / 39°
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.
SatNov 14
32° / 40°
0h below · 21h 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.
SunNov 15
32° / 44°
0h below · 22h 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
30° / 46°
Sap likely
Freeze (30°F) then 46°F — a real freeze-thaw day.

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

Worthington · Hampshire County's hilltowns rank second with 78,267 taps (30.6%; 2022 Census of Agriculture).

Forecast for Worthington

Updated Nov 10, 4:13 AM EST

1 sap day in the next 6

freeze thaw 32°F

WedNov 11
38° / 50°
0h below · 24h above
No refreeze forecast
Low of 38°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
ThuNov 12
35° / 45°
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.
FriNov 13
33° / 40°
0h below · 24h above
No refreeze forecast
Low of 33°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
SatNov 14
31° / 39°
3h below · 20h above
Maybe a light run
Only a light freeze (31°F). Branches may not freeze hard enough for a strong run.
SunNov 15
31° / 42°
2h below · 19h above
Maybe a light run
Only a light freeze (31°F). Branches may not freeze hard enough for a strong run.
MonNov 16
30° / 45°
Sap likely
Freeze (30°F) then 45°F — a real freeze-thaw day.

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.