When to tap maple trees in West Virginia

Maple season in West Virginia usually opens early February and winds down mid-March. Here's the long-run pattern, the year-by-year record, and what the forecast says right now.

Typical season
Opens
February 4
Closes
March 12
Recent openings ranged
Feb 3 – Feb 9 (2016–2018)
Typical length
About 32 days
Sap-flow outlook right now

Forecast for Kingwood

Updated Sep 26, 9:16 AM EDT

It's the off-season. Sap needs freezing nights, and there are none in sight. West Virginia's season usually opens around February 4 — 131 days from now.

No freeze-thaw days in the forecast

Blue = below 32°F · Amber = thaw · dashed line = freezing

  1. SunSep 27
    62°high
    48°low
    0h frozen
    24h thawed
    No freeze, no run
  2. MonSep 28
    61°high
    53°low
    0h frozen
    24h thawed
    No freeze, no run
  3. TueSep 29
    67°high
    55°low
    0h frozen
    24h thawed
    No freeze, no run
  4. WedSep 30
    73°high
    52°low
    0h frozen
    24h thawed
    No freeze, no run
  5. ThuOct 1
    74°high
    58°low
    0h frozen
    24h thawed
    No freeze, no run
  6. FriOct 2
    73°high
    60°low
    0h frozen
    21h thawed
    No freeze, no run

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

Full West Virginia sap forecast →
West Virginia seasons, 2016–2018
JanFebMarAprMaymedian start Feb 420162016: Feb 9 – Mar 1220172017: Feb 3 – Mar 720182018: Feb 4 – Mar 14
Each bar is one season, from the approximate average opening date to closing date reported by USDA NASS.
How to know it's time

Sap runs on a temperature swing, not a date. A night below freezing loads the tree; a day above freezing pushes sap out of the taphole. Field research treats a low under about 30°F followed by a high over about 37°F as a real freeze-thaw day, and big runs almost always come on days like that.

So watch the 10-day forecast. When you see a string of nights in the 20s and afternoons in the 40s, get your taps in a day or two ahead. Tap south-facing slopes first — they warm and run earlier.

Only three NASS seasons exist for West Virginia (estimates ran 2016–2018), so treat the median as indicative. It has the earliest median opening date of any NASS state.

Seasons are shifting. In New England and New York, the sugaring season now begins about 8 days earlier and ends about 11 days earlier than it did 40 years earlier, leaving it roughly 3 days (about 10%) shorter, according to UVM Proctor Maple Research Center survey records analyzed in 2007.

Common questions

When is maple syrup season in West Virginia?
Usually from early February to mid-March — about 5 weeks. The exact start moves by weeks from year to year with the weather.
When should I tap my trees in West Virginia?
Tap just before the first good run: when the forecast shows nights below freezing and days climbing to around 40°F. In a typical year that's around February 4. Tapholes dry up within 6 to 10 weeks, so tapping far too early can cost you the late runs.
What weather makes sap run?
Freezing nights and thawing days. Field research counts a freeze-thaw day as a low under about 30°F and a high over about 37°F; nights in the 20s and days in the 40s are the classic sap days.
Other states

Get a heads-up when West Virginia's sap will run

LuckySap checks the forecast for your trees and can ping you the night before a strong sap day — then keeps every collection and boil in one season log. Free on iPhone.

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