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Snowdonia - Mountain weather forecast

Weather warnings

Warnings affecting Snowdonia over the next 5 days

Confidence

High for settled conditions, with risk of morning fogs, but otherwise clearing to sunshine. Fog clearance detail low confidence throughout.

  • This evening
  • Sunday
  • Monday
  • Further outlook

Saturday 23 February 2019

Sunset: 17:43
Moon phase: Waning gibbous

A band of rain is expected to die out in situ, leaving a legacy of widespread low cloud and some valley mist and fog. Winds easing towards midnight.

Sunday 24 February 2019

Weather hazards

Severe chill effect Low likelihood Hide 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

Poor visibility Low likelihood Show 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

Headline

Chilly with extensive low cloud and fog during the morning. Mild in valleys with sunshine later.

Weather

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Weather at 800m Fog Fog Cloudy Cloudy Sunny intervals Sunny intervals Sunny day Cloudy
Chance of precipitation at 800m 20% 10% 10% 10% 10% 10% 10% 10%

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 S 6 8 E 13 16 SE 20 24 SE 23 28 SE 22 27 SE 18 22 SE 17 20 SE 16 20
600m S 8 11 E 9 12 SE 15 19 SE 17 22 S 17 21 S 13 16 SE 13 16 SE 14 18
300m S 5 9 E 4 7 SE 8 14 SE 8 16 SE 9 16 SE 6 11 SE 6 10 SE 7 15
Valley S 5 9 E 4 7 SE 8 14 SE 8 17 S 9 16 SE 5 11 SE 6 11 SE 7 15

Temperature

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
900m 8 ° 8 ° 8 ° 8 ° 10 ° 10 ° 9 ° 9 °
600m 8 ° 9 ° 9 ° 9 ° 11 ° 12 ° 10 ° 10 °
300m 8 ° 8 ° 8 ° 10 ° 13 ° 14 ° 11 ° 10 °
Valley 8 ° 8 ° 8 ° 10 ° 14 ° 15 ° 12 ° 11 °

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 ° 5 ° 4 ° 4 ° 6 ° 7 ° 6 ° 6 °
600m 6 ° 7 ° 6 ° 6 ° 8 ° 9 ° 7 ° 7 °
300m 7 ° 7 ° 6 ° 8 ° 12 ° 13 ° 10 ° 9 °
Valley 7 ° 7 ° 6 ° 8 ° 12 ° 14 ° 11 ° 9 °

Freezing level

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Freezing level i 1,200 m 1,200 m 1,400 m 1,700 m 1,800 m 1,900 m 1,800 m 1,900 m
Sunrise: 07:16
Sunset: 17:45
Moon phase: Waning gibbous

Weather

A murky start, with extensive low cloud and valley mist and fog that should prove slow to clear in the east, with western slopes perhaps clear by mid-morning. Otherwise, conditions should improve to a fine day with plenty of sunshine, albeit perhaps a little hazy through high cloud. It will be very mild for February, especially in shelter although the southwesterly breeze at height may make it feel nearer mid-single figures degrees Celsius. Mist and eventually fog should reform in valleys during the evening, requiring caution from late descenders.

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

Perhaps 40% in the west at first, with valley fog and broken cloud around 800m. Chances generally improving to 90% by the afternoon, improving latest in the east.

Visibility

Poor or very poor at first in valleys and near the higher summits, but improving to generally good by lunchtime. Deteoriating at low level into the evening as fog reforms.

Meteorologist's view

While mild for February, the breeze in exposure at height may make it feel nearer mid-single figure degrees Celsius.

Ground conditions

Area - Snowdon Date - 22 February 2019 Time - 13.00pm Snow Above - Report By - Snowdon Warden Route Taken Llanberis path Conditions No adverse ground conditions observed by the National Park Wardens. Kit Advice The following is a list of additional kit required based on the current conditions. Wear sturdy walking boots. Take waterproofs, hat, gloves and spare warm layers. For archived reports see - http://www.snowdonia.gov.wales/visiting/walking/ground-conditions

Monday 25 February 2019

Sunrise: 07:14
Sunset: 17:46
Moon phase: Third quarter

Weather

Fine with sunshine after early fog clears, with this expected to occur more readily than on Sunday, perhaps by mid-morning, with the east and north improving first. Mist and fog will reform during the evening in valleys, with care advised for late descents.

Maximum wind speed expected

Southwesterly 30mph.

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

90% throughout, although note low level fog.

Temperature

  • At 800m Plus 11C
  • Valley Zero in places, becoming plus 17C at peak.
  • Freezing level Well above the summits.

Visibility

Poor in valleys at first and during the evening, otherwise improving to very good.

Tuesday 26 February 2019

Sunrise: 07:11
Sunset: 17:48
Moon phase: Third quarter

Another mild and sunny day after a chilly start with valley mist and fog. This should be more sparse than previous days, with better visibility in the drier air. Moderate southerly breezes, with the freezing level well above the summits.

Wednesday 27 February 2019

Sunrise: 07:09
Sunset: 17:50
Moon phase: Third quarter

A more seasonal cooler and cloudy day, with a southwesterly wind. There is a chance that the higher peaks may stand clear of this thicker cloud however. Freezing level remains well clear of the summits, which may be warmer than the valley floors.

Thursday 28 February 2019

Sunrise: 07:07
Sunset: 17:52
Moon phase: Waning crescent

Probably more unsettled, with a strengthening northwesterly wind and more lasting and extensive cloud, perhaps producing a little light rain at times. Freezing level above the summits.

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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