Cairn Gorm1,245 m
17Poor
A poor day on the tops of Cairn Gorm, with very strong, gusty winds and drizzle for much of the day.
Wind43 mph SWGusts 57 mph
Rain2.5 mm
Summit views73%
Cairngorms 4000s weather forecast
Compare Cairn Gorm, Ben Macdui, Cairn Toul, Sgòr an Lochain Uaine and Braeriach in one forecast view.
5 summitsAll five above 4,000 feet
Forecast comparison
Every summit is shown side by side. The combined grade gives extra weight to the weakest forecast.
SummitGradeForecast summaryWindRainSummit viewsDetails
Ben Macdui1,309 mLimiting summit
13Poor
A poor day on the tops of Ben Macdui, with very strong, gusty winds and drizzle for much of the day.
Wind42 mph SWGusts 56 mph
Rain2.5 mm
Summit views69%
Cairn Toul1,291 m
14Poor
A poor day on the tops of Cairn Toul, with very strong, gusty winds and drizzle for much of the day.
Wind43 mph SWGusts 57 mph
Rain2.5 mm
Summit views70%
Sgòr an Lochain Uaine1,258 m
18Poor
A poor day on the tops of Sgòr an Lochain Uaine, with very strong, gusty winds and drizzle for much of the day.
Wind42 mph SWGusts 56 mph
Rain2.5 mm
Summit views73%
Braeriach1,296 m
19Poor
A poor day on the tops of Braeriach, with very strong, gusty winds and drizzle for much of the day.
Wind40 mph SWGusts 53 mph
Rain2.5 mm
Summit views69%
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
Moon for your challenge
Night before your chosen day: Saturday 24 October 2026
Cairngorms
Area reference: Ben Macdui. Local mountain horizons will vary.
Near-full moon
- Illuminated disc
- 98%
- Moonrise
- Outside this window
- Moonset
- 06:18 next morning GMT
Moon up during darker hours18:30 BST to 06:20 GMT next morning
Window: 24 Oct, 17:00 BST to 25 Oct, 08:00 GMT
Night beginning Sunday 25 October 2026
Cairngorms
Area reference: Ben Macdui. Local mountain horizons will vary.
Near-full moon
- Illuminated disc
- 100%
- Moonrise
- Outside this window
- Moonset
- 07:55 next morning GMT
Moon up during darker hours17:25 GMT to 06:30 GMT next morning
Window: 25 Oct, 17:00 GMT to 26 Oct, 08:00 GMT
Approximate times in UK local time, for an open horizon. Moon-up periods are rounded to five minutes. Hills and cloud can hide the Moon. Illumination is the sunlit percentage of its disc, not how bright your route will be. Darker hours here begin after civil twilight. This almanac covers only the stated overnight window and does not change the weather grade. Take a headtorch and spare power regardless.
Planning the Cairngorms 4000s
The Cairngorms 4000s links five of Britain’s highest summits across a remote, exposed plateau and the Lairig Ghru. Even when the general pattern is settled, cloud, wind and temperature can differ across this large mountain area.
Use the challenge grade to compare dates, then inspect all five rows. The forecast does not account for river crossings, snow cover, navigation or the very substantial distance between summits.
Read Cairngorms 4000s route context