Treble Cone NZLIVE
The short answer: PassCast projects a median of 125" at Treble Cone for 2026 — 112% of a typical season — with a skiability rating of 54/100, ~8 powder days, and Jul–Aug as the prime window. Updated daily from 10,000 simulations.
80% of simulated seasons land between 87" and 253". 45% of this season is already locked in by observed snowfall and the 16-day forecast — the simulation only fills in the rest.
10,000 simulated 2026 seasonsENSO-weighted resampling of 36 real seasons (1990–2026) at Treble Cone, tilted by the live seasonal outlook, anchored on snow already on the ground
Highlighted bars span the middle half of outcomes (P25–P75). The yellow dashed line is a typical season — the median of the last 36 at this mountain.
What's driving this forecast
The 2026 season is simulated by resampling Treble Cone's historical seasons weighted toward El Niño analog years. NOAA CPC El Niño Advisory (June 11, 2026): El Niño conditions are present and expected to strengthen into winter 2026-27, with a 63% chance of a very strong event (Niño3.4 ≥ +2.0°C) during Nov-Jan. CPC DJF strength odds: very strong 46%, strong 33%, moderate 16%. IRI (June 22) concurs at 98% El Niño for DJF. Latest observed ONI (AMJ 2026): +1.0.
El Niño drives persistent cold south-westerly flow over the South Island — a modest positive for southern and western fields (NIWA), though ENSO explains only ~25% of NZ's seasonal variance and warm Tasman seas keep early-season snow levels twitchy. Applied as a +3% tilt at partial weight.
The 51-member SEAS5 seasonal forecast puts Aug–Sep snowfall at this grid point at 110% of its ERA5 normal (ensemble mean 109", spread 47–191"). Applied as a +3% tilt — experimental, heavily shrunk and clamped because seasonal models and reanalysis have different biases.
45% of the season window is now locked in by observed snowfall and the blended near-term forecast (5" over the next 16 days). Each analog season contributes only what it delivered outside the known windows in its own calendar.
The regional readNew Zealand · from the 2026-27 outlook
El Niño flips New Zealand into a south-westerly regime — cold S-SW flow favors the southern and western South Island fields. After a mild, delayed June start, that regime is asserting itself: Mt Hutt already carries a 1.0-1.4 m base and 15-30 cm hit South Island peaks in early July. The strong-Niño analogs argue for a respectable-to-good season at Queenstown and Canterbury from mid-July onward, with warm Tasman seas keeping early-season snow levels twitchy on lower slopes. Of the three Southern Hemisphere regions, NZ is the quiet El Niño beneficiary after the Andes.
Month by monthENSO-conditioned analog medians vs a typical month — when this season should deliver
Prime window: Jul–Aug — the deepest contiguous stretch of the conditioned season. Aim the trip there.
The analog poolEvery season since 1990 at Treble Cone (ERA5, calibrated to the resort's reported average), colored by ENSO phase
Next 16 days, model by modelDaily snowfall (inches) at mid-mountain from four global models — fetched 2026-07-10
| Model | 7/10 | 7/11 | 7/12 | 7/13 | 7/14 | 7/15 | 7/16 | 7/17 | 7/18 | 7/19 | 7/20 | 7/21 | 7/22 | 7/23 | 7/24 | 7/25 | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GFS (NOAA) | — | — | 0.9 | 5.1 | 3.4 | — | — | 0.1 | — | — | — | — | — | — | — | 0.7 | 10.1" |
| ECMWF IFS | — | — | — | 2.0 | — | — | — | — | — | — | — | — | — | — | — | — | 2.0" |
| ICON (DWD) | — | — | — | 3.8 | — | — | — | — | — | — | — | — | — | — | — | — | 3.8" |
| GEM (Canada) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.0" |
| PassCast blend | — | — | 0.2 | 2.7 | 0.8 | — | — | — | — | — | — | — | — | — | — | 0.7 | 4.5" |
Pass math for Treble Cone
Treble Cone isn't on a multi-resort pass — but you can still see what a season here is worth.
No multi-resort pass covers these mountains — window tickets are the play.
Treble Cone 2026: straight answers
- How much snow will Treble Cone get in the 2026 season?
- PassCast's latest 10,000-run simulation (reseeded 2026-07-10) puts the median at 125 inches — 112% of a typical season at Treble Cone — with 80% of outcomes between 87 and 253 inches. The forecast blends Treble Cone's own 36-season ENSO analog record with NOAA's seasonal outlook and the ECMWF SEAS5 ensemble.
- Is a season pass worth it for Treble Cone in 2026?
- Treble Cone is not on Epic, Ikon, or Mountain Collective for 2026 — budget about $121 per peak-window day ticket, or check the resort's own multi-day products.
- When is the best time to ski Treble Cone in 2026?
- Jul–Aug is the prime window — the deepest contiguous stretch of the ENSO-conditioned season at Treble Cone. Month-by-month medians are charted on this page.
- How reliable will the snow be at Treble Cone this season?
- The simulation gives Treble Cone a 57% chance of beating its typical season and a median of about 8 six-inch-plus powder days. Its skiability rating is 54/100 (“Solid skiing expected”), updated daily.
Sources: ERA5 reanalysis & multi-model forecasts via Open-Meteo · NOAA CPC ONI, ENSO advisory & seasonal outlook · ECMWF SEAS5 · pass prices verified July 2026. See methodology for the honest fine print.