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Grand Massif ski resort
Tier C — ENSO-proof

Europe

Grand Massif Snow Forecast

Closed for the season

Best months to book: March, February, January · last season + 30-yr record

Closed for the season — closed April 19

Weather data is still collected for informational purposes.

Last Snowfall

Sep 10

11d ago

Past 24 Hours

0cm

Past 48 Hours

0cm

Past 10 Days

0cm

7-Day Forecast

0cm

Snow Depth

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Updated: Sep 21, 2:02 AM•Weather at base: 700m
SnowSure™ Score2025-26 season
Closed for the season

Grand Massif is closed for the season. Here is when it is usually best to book.

Best months to book: March, February, January. Best weeks: 20 Mar–25 Mar, 27 Mar–2 Apr, 3 Apr–9 Apr.Dec3Jan2Feb1MarAprOpens 14 DecCloses 19 Apr

March

#1 to book

79cm avg · scored 42.8

February

#2 to book

87cm avg

January

#3 to book

99cm avg

Best weeks to book

  1. #120 Mar – 25 Marscored 38.5
  2. #227 Mar – 2 Aprscored 46.9
  3. #33 Apr – 9 Aprscored 24.7

Ranked on 25% last season's SnowSure score (2025-26) · 75% 30-year snowfall and base-depth record. The live score returns when the lifts turn.

Snow Summary

2,500m
ECMWFGFSGEMJMAICONMétéo-Fr

Updated Sep 21, 2026 at 2:02 AM

0cm
24h
0cm
Past 10d
7-Day Forecast
0
Prev10d
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Now21
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T22
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W23
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T24
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F25
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S26
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S27
Days 8–14 and every model are in Pro.Unlock with Pro
Past
Today
Forecast

Hourly Forecast

21 Mon
12° / 1°
22 Tue
12° / 2°
23 Wed
11° / 1°
24 Thu
10° / 0°
25 Fri
10° / -3°
26 Sat
13° / 1°
27 Sun
13° / 1°
Days 8–14 and every model are in SnowSure Pro.Unlock with Pro
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight28 Mon29 Tue30 Wed1 Thu2 Fri3 Sat4 Sun
Conditions⛅☁️☁️☀️☀️☀️☀️☀️☀️☀️☁️☀️🌤️🌤️☀️☀️☀️☀️🌤️⛅☀️
some cloudscloudycloudyclearclearclearclearclearclearclearcloudyclearmostly clearmostly clearclearclearclearclearmostly clearsome cloudsclear
Summit2,500 mModeled
Temp°C4°11°4°4°11°3°4°11°3°4°10°2°1°9°1°4°12°4°4°12°5°
Feels like°C1°9°1°1°9°1°1°9°1°1°7°-1°-3°6°-2°1°9°1°1°10°2°
Snowcm·····················
Precipmm·····················
Windkm/h362262262362252252252
Mid-mountain1,600 mModeled
Temp°C10°17°10°10°17°9°10°17°9°9°16°8°6°15°7°10°18°10°10°18°10°
Feels like°C8°16°8°8°16°8°8°15°7°7°14°6°3°13°5°7°16°7°8°17°9°
Snowcm·····················
Precipmm·····················
Windkm/h362262262362252252252
Base700 mModeled
Temp°C16°23°16°16°23°15°16°23°15°15°22°14°12°21°13°16°24°15°16°24°16°
Feels like°C15°23°16°14°23°15°15°23°15°14°21°13°10°20°12°13°23°14°15°24°16°
Snowcm·····················
Precipmm·····················
Windkm/h362262262362252252252
Humidity%664574444467575171584166393462283050544563
0°C linem—————————————————————
Forecast Range · SnowSure Pro

Every model for Grand Massif, side by side for 14 days

Where the models agree, where they split, and which one has been most accurate here. Free for 14 days, then yearly.

Unlock with Pro

SnowSure™ blend — verified model weighting

The black line is not a simple average. For Grand Massif (alps), we combine seven global weather models using weights learned from daily forecast verification — comparing each model's prediction to measured snowfall (SNOTEL, resort reports, ERA5).

  • 1.Horizon buckets: days 1–3, 4–7, and 8–14 each get separate weights — short-range skill differs from long-range.
  • 2.Regional calibration: weights come from verified error in this geography (Rockies, Alps, Japan, etc.), recalculated weekly.
  • 3.Ground truth only: we never grade a forecast against another model — only against measured snow.

Building verification history for this resort.

How we verify forecasts →

Snowfall Forecast Maps

The Alps region

El Niño Outlook · Winter 2026-27

Grand Massif El Niño rank & forecast

Grand Massif ranks #196 of 488 SnowSure resorts — Tier C, +1% in strong El Niño winters.

Tier C — ENSO-proof: Strong El Niño winters looked like a normal year here — within about ±3% of this resort’s own 30-year snowfall average. Not a jackpot, not a bust: a hedge if you’re planning around El Niño.

#196 of 488Tier C — ENSO-proof

Strong-event signal: +1% vs this resort's 30-yr avg

In the three strongest El Niño winters on record ('97-98, '15-16, '23-24), Grand Massif averaged +1% versus its own 30-year snowfall baseline. El Niño has historically made little difference here — this is an ENSO-proof mountain, for winter 2026-27 as in past events. Analog winters: '97-98 0%, '15-16 +23%, '23-24 -18%. A pattern, not a promise.

'97-98 0%'15-16 +23%'23-24 −19%

Signal = average snowfall in the three strongest El Niño winters since 1996 ('97-98, '15-16, '23-24) vs this resort's own 30-year ERA5 baseline. n=3 — a lean, not a law. Updated monthly against measured snowfall Dec–Mar.

Full El Niño report →

ENSO seasonal analog

History · not a forecast

In 10 past El Niño winters at Grand Massif, ERA5 season snowfall median was 522 cm (206 in), about 1% below this resort’s long-term median. This is a historical analog from reanalysis — not a prediction of this winter’s storm track.

Prevailing ONI

El Niño

JJA 2026 · ANOM +1.8°C

Analog season median

522cm

10 El Niño winters · 1% below median

All-season median

530cm

Across 30 ERA5 seasons (2026-27)

PhaseSeasonsMedianp25–p75Recent analogs
El Niñocurrent10522cm475cm – 540cm2023, 2019, 2018, 2015, 2014, 2009
La Niña12594cm459cm – 659cm2022, 2021, 2020, 2017, 2011, 2010
ENSO-neutral8532cm402cm – 651cm2025, 2024, 2016, 2013, 2012, 2003

Season snowfall from Open-Meteo ERA5 reanalysis (~9 km). ENSO phase from NOAA CPC Oceanic Niño Index. Relative phase differences are more trustworthy than absolute cm totals. Source: NOAA CPC Oceanic Niño Index + Open-Meteo ERA5 via SnowSure season archive.

Local Reports

0 reports

How accurate is this forecast?

We verify every forecast against what actually fell — see the model-by-model results.

→

Frequently asked questions about Grand Massif

How much snow is Grand Massif getting this week?
No significant snow is forecast at Grand Massif over the next 7 days.
What is the 14-day snow forecast for Grand Massif?
The full 14-day forecast for Grand Massif — the SnowSure™ blend and every model we track, day by day — is part of SnowSure Pro. The first 7 days are free on this page.
How accurate are SnowSure forecasts for Grand Massif?
We verify every forecast against what actually fell and publish the results — see our forecast verification pages for model-by-model accuracy, updated continuously.