New Brunswick sap flow forecast

The next several days for New Brunswick'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. The season here usually opens late February to March (south first).

Recognized as the 'Maple Capital of the Atlantic' (Town of Saint-Quentin), in northwestern New Brunswick, home to operations as large as 115,000 taps (ACOA, 2026).

Forecast for Saint-Quentin

Updated Sep 26, 4:00 AM EDT

No freeze-thaw days in the forecast

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

  1. SunSep 27
    18°high
    9°low
    No freeze, no run

    Low of 48°F — trees need a hard freeze to reload. No freeze, no run.

  2. MonSep 28
    17°high
    3°low
    No freeze, no run

    Low of 37°F — trees need a hard freeze to reload. No freeze, no run.

  3. TueSep 29
    19°high
    7°low
    No freeze, no run

    Low of 45°F — trees need a hard freeze to reload. No freeze, no run.

  4. WedSep 30
    21°high
    4°low
    No freeze, no run

    Low of 39°F — trees need a hard freeze to reload. No freeze, no run.

  5. ThuOct 1
    20°high
    11°low
    No freeze, no run

    Low of 52°F — trees need a hard freeze to reload. No freeze, no run.

  6. FriOct 2
    17°high
    14°low
    No freeze, no run

    Low of 57°F — trees need a hard freeze to reload. No freeze, no run.

Data: Environment and Climate Change Canada. Verdicts use freeze-thaw thresholds from maple field research; your woods may run a little differently.

Somewhere else in New Brunswick?

Your sugarbush, your forecast

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

Planning ahead? Typical tapping dates for New Brunswick →

Data & method

  1. MSC GeoMet — city page weather — Environment and Climate Change Canada
  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

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.

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