Lochaber mountain weather forecast.

Ben Nevis, the Mamores and surrounding ranges. Height-aware guidance for wind, cloud, rain and temperature.

Mountain Weather brief

Lochaber

Tuesday 20 October 2026 · Ben Nevis, the Mamores and surrounding ranges

Confidence: Medium Why?

Uncertainty over rain amounts and timing. Uncertainty over high-ground wind strength. Uncertainty over sky cloud cover and sunshine.

What matters most

A poor day on the tops in Lochaber, with rain arriving in the early afternoon.

High-ground wind · 900 m20-30 mph southerly Gusts · 900 m25-35 mph Cloud base700-1300 m Feels like · 900 m-2 to 2°C
Regional median

Sunshine and sky

More sunshine later. Sunshine is indicated more often later in the day.

Modelled sunshine2.9 h29% of daylight
Early0 h sunshine
MiddayLess than 1 hour sunshine
Later2 h sunshine

These are direct modelled sunshine hours during daylight, not the probability of sunshine. Cloud cover and summit cloud are assessed separately in the forecast above. The regional median prevents one unusually bright or dull summit cell defining the whole area.

Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.

Morning · 08:00–12:00PoorSummit winds around 20-35 mph. Gusts around 35-45 mph are possible on exposed ground. Gusts this strong can make walking into it hard work, with buffeting on ridges and edges. Rain is forecast on some hills during this period. Some early summit cloud is possible. Rain is possible during the main walking period, but its timing may shift by several hours.
44
Afternoon · 12:00–17:00PoorSummit winds around 15-30 mph. Gusts around 30-40 mph are possible on exposed ground. Gusts this strong can make walking into it hard work, with buffeting on ridges and edges. Rain is forecast on some hills during this period. Rain is possible during the main walking period, but its timing may shift by several hours.
44

Conservative regional grades across representative summits, so one sheltered hill does not overstate the wider area.

01

High-ground wind (900 m)

At around 900 m, expect a southerly wind of 20–30 mph, gusting 25–35 mph, strongest first thing and easing later. Gusts like that will be noticeable on ridges and open tops, and you will chill quickly when you stop.

02

Walking impact

Gusts of 25–35 mph will be noticeable on ridges and open tops, and you will chill quickly when you stop.

03

Rain and showers

A band of rain moves in during the early afternoon. Expect 2–5 mm in total. Rain is possible during the main walking period, but its timing may shift by several hours. The timing may shift by a few hours.

04

Cloud-free summits

Clear-summit estimate: about 80% early, about 80% around midday and about 55% later.

05

Cloud and visibility

The tops should stay mostly clear of cloud. The cloud base could be as low as 700–1000 m in the late afternoon. It will look largely cloudy overhead, but that cloud should mostly stay above the tops.

06

Temperature and wind chill

At around 900 m it will be 4 to 8°C, feeling like -2 to 2°C in the wind. It turns milder through the day. Take a hat, gloves, a windproof and a spare warm layer. Pack waterproofs too, and keep a warm layer dry in your pack.

07

Freezing level

The freezing level is around 1100–1400 m, so it will be below freezing on the tops.

08

Daylight

Sunrise 08:01, Sunset 18:05, about 10.1 hours daylight.

Overnight · 17:00–08:00Wild campingBetaAcross these hills, a mixed night to camp, mainly because of the wind: gusts of about 35 mph. 54Mixed · 600 m View detailsHide details
Regional night beginning Tuesday 20 October 2026

Full regional overnight outlook

Across these hills, a mixed night to camp, mainly because of the wind. Gusts reach about 35 mph on open ground, so peg out well and use the guylines. Look for shelter from the south. Some light rain is forecast overnight. Above about 600 m you'd likely be in cloud for part of the night: damp, and hard to find your way if you need to move. The air is damp up around 900 m, so expect heavy condensation. Leave the vents open. Overnight lows of about 6°C at 900 m.

Overnight rain1.1 mmOpen ground · 600 m16 mph · gusts 28 mphMorning pack-upDampness possible

Moon overnight

Waxing gibbous moon

Illuminated disc
72%
Moonrise
Outside this window
Moonset
01:36 next morning BST

Cloud and terrain vary across the area. Illumination describes the sunlit part of the Moon, not brightness at your pitch.

Overnight window: 20 Oct, 17:00 BST to 21 Oct, 08:00 BST. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.

Representative location: 56.797, -5.004. Times vary across the area.

300 m64 · mixed
Wind / gust
13 mph / 24 mph
Coldest
6.5°C
In cloud
0% of modelled night
Condensation
Moderate
600 m54 · mixed
Wind / gust
16 mph / 28 mph
Coldest
6.2°C
In cloud
93% of modelled night
Condensation
Moderate
900 m39 · poor
Wind / gust
18 mph / 33 mph
Coldest
6.1°C
In cloud
100% of modelled night
Condensation
High

Open-hillside guidance across representative hills. Local shelter, ridges, tent design and the exact pitch can change conditions substantially. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.

Daytime · exposed rockClimbing & scramblingBetaSub-zero temperatures and moisture may leave icy patches on exposed rock. Wet rock is likely. Gusts near 40 mph may affect balance on exposed rock. 0Poor · Very poor View detailsHide details
Regional rock conditions · sampled mountain terrain

Regional climbing & scrambling outlook

A broad guide to dampness and exposed rock across the area, not a forecast for every crag. Lower, sheltered crags and individual rock types may behave differently.

Conditions for exposed scrambling across the area look very poor (0/100). Rain is likely to leave rock wet. Polished slabs, vegetation and drainage lines may be notably worse. Gusts may reach about 40 mph on exposed ground, making crosswinds an important route consideration. Mapped summit-point geology across the representative hills includes psammite, pelite or semipelite, granite, gneiss or gabbro and volcanic rock. Rock can therefore respond differently to moisture between crags and routes.

Rock surfaceWet rock likelyExposed gust39 mphRain1.8 mm
Mapped rock across sampled summits4 broad familiesSummit samples, not a survey of every crag
psammite, pelite or semipelite 38% 3 representative summitsDry quartz-rich bands can be grippy, while mica-rich or foliated sections, lichen and vegetation may become slippery when wet.granite, gneiss or gabbro 25% 2 representative summitsGenerally grippy when dry and often still positive when damp, but wet slabs, lichen, polish and drainage lines can remain slippery.volcanic rock 25% 2 representative summitsOften grippy when dry, but volcanic rocks vary widely; wet lichen, smooth holds and local seepage can still make them slippery.quartzite 12% 1 representative summitUsually hard and grippy when dry and often reasonably positive when damp, although wet lichen and smooth slabs can still be slippery.

Representative summit-point samples across the region; individual crags and routes may differ.

Generic exposed hands-on-rock terrain across representative summits; mapped summit-point geology is a broad regional sample, not a named-route survey. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.

Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit

For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.

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This is about Lochaber on Tuesday 20 October 2026. It asks about intentions, not whether you actually went out. No name or account is needed.

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Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.

Updated 15 October 2026 at 15:29 UTC. See typical weekly and monthly conditions for Lochaber.

More context for your hill day

Check the approach as well as the tops

Compare midge conditions by day and height, or look for a possible cloud inversion. For Snowdon and Tryfan, camera-derived cloud-base observations add a view of conditions already seen on the slopes.