Mountain weather

Snowdonia

There may be weather warnings in force for the UK

Snowdonia Mountain weather forecast table

Confidence

High confidence for a cloudier and windier day on Tuesday with some rain. Lower confidence thereafter in regards to cloud and rain through Wednesday and Thursday.

This evening forecast

Sunrise:
Sunset:

Some late sunshine through the evening with some clear spells to start the night.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.

hazard Gales
Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.

Mountain weather forecast

Becoming increasingly cloudy on Tuesday with light rain, particularly across western areas, and turning increasingly windy.

Wind direction and speed (mph)
Altitude above mean sea level
Wind gust (mph)
Altitude above mean sea level

Altitude above mean sea level

Altitude above mean sea level

Additional weather information

Meteorologist's view

Strong winds over the summits in particular, with winds gusting close to 60 mph.

Weather

Increasingly cloudy on Tuesday, with low cloud forming on the summits and with intermittent light rain and drizzle developing by mid-morning. Remaining overcast through the rest of the day with further spells of light rain and drizzle at times, with the best of any drier interludes in sheltered northeastern parts of the mountains. Increasingly windy, with very strong winds developing over the summits.

Chance of cloud-free mountain/hill tops at 800m

80% overnight, falling to 30% by dawn, and then to 10% or less from mid-morning as extensive low cloud develops.

Visibility

Good at low levels initially, but becoming moderate occasionally poor in rain or drizzle, and very poor on higher routes.

Ground conditions

Please see - https://www.eryri.llyw.cymru/visiting/walking/ground-conditions

Sunrise:
Sunset:

Mountain weather information

Weather

Cloud and rain to start the day with extensive low cloud and hill fog. This rain should clear northwards through the morning leaving some brightness before more rain arrives by evening.

Chance of cloud-free mountain/hill tops at 800m

Nil at first, rising to 30% by late morning.

Maximum wind speed expected

Southwesterly 45-50 mph.

Temperature

  • At 800m 12 Celsius.
  • Valley 18 Celsius.
  • Freezing level Well above the summits.

Visibility

Moderate occasionally poor to start the day, and very poor on higher routes. Improving through the morning, possibly becoming good for a time across lower routes.

Mountain weather information

Thursday 6 August

Sunrise:
Sunset:

Cloud with further rain or drizzle through the morning, and fog over higher routes. Rain easing through the afternoon. Lighter winds. Freezing level well above the summits.

Friday 7 August

Sunrise:
Sunset:

A drier day to come with more in the way of sunshine. Small risk of an afternoon shower. Feeling warm, with freezing level well above the summits.

Saturday 8 August

Sunrise:
Sunset:

A fine day to come across Snowdonia with light winds and plenty of sunshine. Feeling warm, with freezing level well above the summits.

Updated at:

The region can be divided into four areas with the northernmost area the most popular, including peaks such as Moel Hebog, Mynydd Mawr and the Nantlle Ridge. Many hikers tend to concentrate on Snowdon itself regarding it as a fine mountain. However it can become quite crowded, with the peak welcoming around half a million visitors every year, of which four fifths scale the peak on foot, while the remainder choose to take the train instead.

One of Snowdon’s main attractions is the sheer number and variety of paths that reach the peak. This means that everyone from mountaineering novices to climbing experts should find a way up the mountain that will suit their abilities or provide them with a sufficient test. The easiest is the Llanberis path which, being the longest, has the most shallow ascent. In contrast, the Watkin Path is widely seen as being the most demanding ascent, despite also being considered the prettiest.