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Snowdonia - Mountain weather forecast

Weather warnings

Warnings affecting Snowdonia over the next 5 days

Confidence

High for a breezy, rather unsettled and generally milder week, but only medium for details and timings of precipitation.

  • This evening
  • Monday
  • Tuesday
  • Further outlook

Sunday 21 January 2018

Sunset: 16:40
Moon phase: Waxing crescent

Mostly cloudy with patchy light rain, sleet and summit snow. Strong to gale force westerly winds.

Monday 22 January 2018

Weather hazards

Poor visibility High likelihood Hide detail

Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.

Learn more about poor visibility

Gales Medium likelihood Show detail

Progress will be impeded by very strong winds. Walking will be difficult and strenuous at times with a potential for one to be blown over in gusts. There can be a marked increase in winds through cols or on exposed ridges and summits. Distances often take longer to cover with compass bearings becoming more difficult to follow accurately.

Learn more about gales

Severe chill effect Medium likelihood Show detail

Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.

Learn more about severe chill effect

Headline

Mostly cloudy with a little rain or summit snow at times. Strong westerly winds.

Weather

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Weather at 800m Partly cloudy night Partly cloudy night Cloudy Light snow Light snow Cloudy Cloudy Cloudy
Chance of precipitation at 800m 30% 30% 40% 60% 60% 30% 40% 60%

Wind speed and direction

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
900m W 32 39 W 29 35 W 28 34 W 27 32 W 29 35 W 27 33 SW 27 33 SW 32 40
600m W 21 27 W 19 24 W 18 23 W 17 22 W 19 25 W 18 24 SW 18 24 SW 21 28
300m W 11 25 W 10 22 W 9 22 W 9 21 W 11 23 W 10 21 SW 10 22 SW 11 25
Valley W 12 26 W 10 23 W 10 22 W 9 21 W 12 24 W 11 22 SW 10 23 SW 11 25

Temperature

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
900m 1 ° 1 ° 1 ° 1 ° 1 ° 1 ° 1 ° 2 °
600m 4 ° 3 ° 3 ° 3 ° 3 ° 3 ° 3 ° 4 °
300m 6 ° 5 ° 5 ° 5 ° 6 ° 6 ° 5 ° 6 °
Valley 7 ° 6 ° 7 ° 7 ° 7 ° 7 ° 7 ° 7 °

Feels like temperature

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
900m -7 ° -7 ° -6 ° -6 ° -7 ° -7 ° -6 ° -6 °
600m -2 ° -2 ° -2 ° -2 ° -3 ° -3 ° -2 ° -2 °
300m 2 ° 2 ° 2 ° 2 ° 2 ° 2 ° 2 ° 3 °
Valley 4 ° 3 ° 4 ° 4 ° 4 ° 4 ° 4 ° 4 °

Freezing level

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Freezing level i 1,000 m 1,000 m 1,000 m 900 m 900 m 900 m 1,000 m 1,200 m
Sunrise: 08:15
Sunset: 16:41
Moon phase: Waxing crescent

Weather

Mostly cloudy with outbreaks of mainly light rain, sleet and, above about 750m, snow especially across more western ranges. Some drier spells are likely especially during the afternoon across more eastern fells where a little brightness is possible. During the evening any precipitation is likely to be rain at all levels.

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

Little chance across western hills with periods or persistent cloud above about 600m lowering to 300m at times in precipitation. Chances better in the east but still only around 30% with cloud becoming periods above 750m at times.

Visibility

Good falling to just a few kilometres in rain, sleet and snow

Meteorologist's view

Gusts around 50mph expected at first and again later over ridges and summits. A continuing thaw at all but the highest levels.

Ground conditions

Area - Snowdon Date - 20 January 2018 Time - 11.00am Snow Above - 400m Report By - Snowdon Warden Route Taken PyG and Miners Track Conditions • Heavy frost cover on rocks and vegitation. • Depth of snow increases with altitude. • Snow drifts in areas. • The snow is soft at the moment Kit Advice The following is a list of additional kit required based on the current conditions. • Ice axe and crampons recommended. • Wear crampon compatible boots. • Take waterproofs, hat, gloves and spare warm layers.

Tuesday 23 January 2018

Sunrise: 08:14
Sunset: 16:43
Moon phase: First quarter

Weather

Continuing mostly cloudy with outbreaks of rain, perhaps a little snow on the highest summits, most persistent and occasionally heavy across western fells during the morning and early afternoon.

Maximum wind speed expected

Southwesterly winds 30-35mph, with gusts around 55mph over ridges and summits, easing later

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

Similar to Monday with little chance across western ranges with periods or persistent cloud above about 600m lowering to 300m at times with cloud over eastern fells lifting to become periods above about 750m at times.

Temperature

  • At 800m Plus 2 Celsius rising to plus 5 Celsius.
  • Valley Around plus 6 Celsius rising to plus 11 Celsius by day.
  • Freezing level Above the summits.

Visibility

Good falling to just a few kilometres in rain and summit snow

Wednesday 24 January 2018

Sunrise: 08:13
Sunset: 16:45
Moon phase: First quarter

Early rain clearing to sunny spells and occasional showers, these turning increasingly to snow above about 900m. Gale or severe gale force southwesterly winds at times. Freezing level falling close to the highest summits.

Thursday 25 January 2018

Sunrise: 08:11
Sunset: 16:47
Moon phase: First quarter

Clear or sunny spells and wintry showers, falling mainly as snow above about 600m, the showers may merge to give a longer spells of rain or snow during the late morning. Southwesterly gales turning more westerly and easing later. Freezing level falling to around 750m.

Friday 26 January 2018

Sunrise: 08:10
Sunset: 16:49
Moon phase: First quarter

A few snow showers, falling increasingly as rain below about 600m, with some decent spells of sunshine. Cloud increasing later with risk of more persistent rain and snow during the evening. Strong westerly or northwesterly winds backing southwesterly later. Freezing level around 750m.

Issued at:
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The Snowdonia mountains are made up of 90 mountain peaks including the tallest mountain in Wales, Snowdon, standing at 1,085 metres.

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.

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