Cairngorms
Ben Macdui Weather
Mountain forecast and current conditions · summit 1309m
Current conditions
Daylight Today
- Sunrise
- 06:24
- Sunset
- 20:03
- Civil dawn
- 05:44
- Civil dusk
- 20:43
NOAA Solar Calculator · 5 September 2026
About the weather here
Ben Macdui (1,309m) is the second-highest mountain in Britain and the high point of the Cairngorm plateau. It is not a peak so much as the highest bump on a vast, featureless expanse of gravel and boulders, and that is exactly what makes its weather dangerous: there is no ridge to follow, no shelter, and in cloud the summit cairn is the only thing to aim for. Most ascents start from the Cairngorm ski car park and cross the plateau; the Linn of Dee approach from the south is far longer.
What to expect
The Cairngorm plateau has an arctic climate. Wind is the defining feature — the plateau is at 1,100m or more for kilometres in every direction, so there is nothing to slow it down, and it can be blowing a full gale on the summit while Aviemore is calm. Cloud sits on the plateau for much of the year and whiteout — snow, cloud and ground all the same colour — is the classic condition that kills people here. Summer snow patches persist into July and August in the corries.
Wind exposure
Extreme. The plateau crossing from Cairn Lochan to Ben Macdui is the most wind-exposed walking route in Scotland, several kilometres of ground above 1,100m with no lee. Spindrift in winter reduces visibility to nothing. If the forecast gives gusts above about 50mph on the summits, the crossing is not a walk.
Winter conditions
Ben Macdui in winter is a mountaineering objective, not a walk. The plateau crossing requires confident compass navigation in whiteout; the corrie edges — Coire an Lochain, Coire an t-Sneachda, the Lairig Ghru side — carry cornices that are invisible from above. The avalanche forecast linked on this page covers this ground and should be read before every winter day. Cold here is severe: the plateau regularly records the lowest temperatures in Britain and wind chill on the summit is far below the air temperature.
Avalanche forecast: Ben Macdui is in the SAIS Northern Cairngorms forecast area — the link is in the official forecasts below.
Official forecasts
Always check an official mountain forecast before setting out. Current conditions displayed above are from the Open-Meteo API and are indicative only.
Hills in this area
| Hill | Height |
|---|---|
| Derry Cairngorm | 1156m |
| Cairn Toul | 1291m |
| Braeriach | 1296m |
| Sgor an Lochain Uaine | 1258m |
Frequently asked questions
- How cold is Ben Macdui?
- Colder than anywhere else you are likely to walk in Britain. The plateau is above 1,100m with nothing to shelter it, and wind chill routinely takes the felt temperature far below the air temperature. Even in July a summit day can feel like winter; from October to May treat it as arctic.
- Why is the Ben Macdui plateau so dangerous in cloud?
- Because there is nothing to navigate by. The ground is flat gravel and boulders, the corrie rims are unmarked, and snow, cloud and ground become the same white. Walkers have died within a few hundred metres of the summit after losing their bearings. Compass navigation is essential and a GPS is a backup, not a substitute.
- Is there an avalanche forecast for Ben Macdui?
- Yes — the SAIS avalanche forecast linked on this page covers the northern Cairngorms, which includes Ben Macdui and the corries between it and Cairn Gorm. Read it before any winter ascent.
- Is Ben Macdui harder than Cairn Gorm?
- Not steeper, but longer and much more committing. Cairn Gorm is close to the car park and the ski area; Ben Macdui is a long plateau crossing from it, with the return journey in whatever the weather has become. Turnaround times matter more here than on almost any other Munro.
Weather for other locations
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