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Snowdonia - Mountain weather forecast

Weather warnings

Warnings affecting Snowdonia over the next 5 days

Confidence

High confidence for a fine day through Friday and for cloudier conditions through the weekend with the prospect of low cloud covering the tops on Saturday and Sunday. Improving conditions later on Sunday although only medium confidence on the timing of this change.

  • Thursday
  • Friday
  • Further outlook

Thursday 18 October 2018

Weather hazards

Strong sunlight Low likelihood Hide detail

Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.

Learn more about strong sunlight

Headline

A fine dry and sunny day with excellent visibility and light winds.

Weather

06:00 09:00 12:00 15:00 18:00 21:00
Weather at 800m Clear night Sunny day Sunny day Sunny day Sunny day Clear night
Chance of precipitation at 800m <05% <05% <05% <05% <05% <05%

Wind speed and direction

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
900m NE 16 21 E 12 16 E 7 11 E 7 10 E 11 14 SE 14 17
600m NE 8 13 E 7 11 E 6 10 SE 6 10 SE 8 11 SE 11 14
300m E 5 11 E 3 7 E 4 9 SE 4 9 SE 5 9 SE 6 11
Valley E 5 11 E 3 7 E 4 9 E 4 9 SE 5 9 SE 6 11

Temperature

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
900m 4 ° 3 ° 5 ° 5 ° 4 ° 4 °
600m 6 ° 6 ° 7 ° 8 ° 6 ° 6 °
300m 7 ° 8 ° 10 ° 11 ° 8 ° 7 °
Valley 8 ° 9 ° 12 ° 12 ° 9 ° 8 °

Feels like temperature

06:00 09:00 12:00 15:00 18:00 21:00
Altitude above mean sea level
900m -2 ° -1 ° 2 ° 2 ° 0 ° -1 °
600m 3 ° 3 ° 6 ° 6 ° 4 ° 3 °
300m 6 ° 7 ° 10 ° 10 ° 6 ° 5 °
Valley 7 ° 9 ° 11 ° 11 ° 8 ° 7 °

Freezing level

06:00 09:00 12:00 15:00 18:00 21:00
Freezing level i 1,200 m 1,200 m 1,200 m 1,200 m 1,300 m 1,300 m
Sunrise: 07:47
Sunset: 18:15
Moon phase: First quarter

Weather

A fine dry day with plenty of sunshine and light to moderate winds.

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

High chance that the summits will remain clear of any cloud throughout the day.

Visibility

Excellent, with superb views of the surrounding landscapes.

Meteorologist's view

An excellent day out with light to moderate winds and plenty of sunshine, chilly in any shady spots.

Ground conditions

No recent ground conditions report available. For archived reports see - http://www.snowdonia.gov.wales/visiting/walking/ground-conditions

Friday 19 October 2018

Sunrise: 07:49
Sunset: 18:13
Moon phase: First quarter

Weather

Generally cloudy, with a little light rain or drizzle possible in the morning. Cloud thinning for a time around the middle of the day to give some brighter intervals.

Maximum wind speed expected

South or southwest 15-20mph, gusting at times to 25mph

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

60%, with patchy cloud down to 600m at times.

Temperature

  • At 800m 4 Celsius
  • Valley 6 Celsius rising to 13 or 14 Celsius
  • Freezing level above the summits

Visibility

Good or very good visibility

Saturday 20 October 2018

Sunrise: 07:51
Sunset: 18:10
Moon phase: Waxing gibbous

Cloudy and misty with patchy rain and drizzle developing. Extensive cloud cover developing above 500m, lowering to 200m in the afternoon and evening. Fresh or strong southwest winds across the summits.

Sunday 21 October 2018

Sunrise: 07:53
Sunset: 18:08
Moon phase: Waxing gibbous

Remaining overcast and misty with spells of rain and drizzle, although mostly light. Improving conditions will spread down from the northwest later in the day with some late sunshine possible. Fresh to strong southwest veering northwest winds across the summits.

Monday 22 October 2018

Sunrise: 07:55
Sunset: 18:06
Moon phase: Waxing gibbous

Dry with sunny intervals, but colder than through the weekend with a fresh northwest wind across the tops.

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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