Mountain weather

Brecon Beacons

There may be weather warnings in force for the UK

Brecon Beacons Mountain weather forecast table

Confidence

High for a cold, showery and still windy couple of days and for milder, wetter conditions from mid-week, but lower confidence for timings of showers, snow level and amounts of rainfall Wednesday and Thursday.

This evening forecast

Sunrise:
Sunset:

A few clear spells, but rather cloudy with showers, these of snow down to 600m. Strong or gale force westerly winds.

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.

hazard Blizzards
Blizzards and whiteouts present challenging and serious conditions due to a combination of falling or blowing snow, strong winds and cold temperatures. They can be highly disorientating, often resulting in near-zero visibility with limited or no visual references and no distinction between ground and sky. Cliff edges and cornices may not be apparent, even close up. These conditions require very good navigational skills.
hazard Heavy snow
Heavy snow can lead to rapid changes in underfoot conditions and paths may become treacherous or hidden. It also brings very poor visibility and often makes navigation much more challenging. When deep snow accumulates progress is often time consuming and strenuous, significantly affecting the distance one can travel on foot. Deep drifts can develop if snow is combined with strong winds. A heightened avalanche risk is possible and avalanche reports should be consulted where available.

hazard Storm force winds
Storm force winds (gusts over 70mph) make walking very strenuous with any mobility virtually impossible over exposed ground. Where these conditions occur there is a high risk of being blown over and even standing may be impossible at times with a risk of being blown off one’s feet. Basic tasks such as using a map, eating, putting on extra clothing or communication become extremely difficult away from any shelter.
hazard Poor visibility
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.
hazard Thunderstorms
Lightning is a significant mountain hazard which can result in serious injury or death. Mountain terrain often leaves one highly exposed to lightning strikes. Hail may give unpleasant conditions with torrential rain and localised flash flooding also possible, mainly in Summer months.
hazard Heavy persistent rain
Heavy and persistent rain can lead to drenched clothing and footwear with waterproofs often becoming soaked through, especially if accompanied by strong winds. This can lead to significant loss of body heat and an increased likelihood of hypothermia. Terrain may turn increasingly boggy underfoot while streams can flood and become impassable. There may also be a risk of flooding in valleys or glens. If there is snow cover, a heightened avalanche hazard is possible and avalanche reports should be consulted where available.

Mountain weather forecast

A windy, showery day, with snow falling on the tops and showers likely to merge to give a longer spell of rain and summit snow in the morning.

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

Weather

A few showers overnight, then bright spells and occasional heavy showers, these wintry over the summits and merging to give a more prolonged spell of rain and summit snow mid to late morning. Temporary blizzard conditions at height with risk of thunder and hail too. Best of the sunnier spells in east in the afternoon.

Chance of cloud-free mountain/hill tops at 600m

50 to 70%, with cloud down to 500m at times, best chance in east, though 20% chance for a time in morning with more prolonged rain bringing more extensive cloud down to 400 or 500m.

Visibility

Very good out of cloud, but moderate or poor in rain and showers and very poor at height in cloud and snow.

Meteorologist's view

Blustery and gusty winds and average speeds at lower levels likely stronger then shown on tables, by 5-10mph. Rather hazardous conditions at height with snow and gale force winds and a significant chill. Flooding still likely in places from rain over last few days. Winds may gust up to 65mph over exposed higher peaks in showers, especially in morning.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
0mm0mm0mm
Measurement date:

Rainfall data provided by Natural Resources Wales. The Met Office is not responsible for content provided by third parties and may remove this data without warning.

Sunrise:
Sunset:

Mountain weather information

Weather

Sunny spells and occasionally heavy showers, falling as snow above 700m, with risk of hail and thunder. Showers becoming frequent in afternoon, but most dying out in evening though snow level will fall to 500m.

Chance of cloud-free mountain/hill tops at 600m

60% with broken cloud down to 500m at times, but 30 or 40% chance in afternoon with more frequent showers bringing more in the way of cloud.

Maximum wind speed expected

West to southwest 35 to 45 gust 60mph, but risk 50 gust 75 mph over exposed peaks and ridge with showers. Veering northwest 30 gust 45mph in evening

Temperature

  • At 600m Plus 3 falling to Zero C later
  • Valley Plus 3 rising to plus 8 C
  • Freezing level Rising to 900m by morning, later 600m

Visibility

Very good out of cloud, but a few kilometres or less with showers and very poor at height at times with snow.

Mountain weather information

Wednesday 19 February

Sunrise:
Sunset:

A mainly dry start with fresh westerly winds, but southwest gales developing in the morning to bring cloudier conditions and outbreaks of rain. Some heavy rain and summit snow for a time.

Thursday 20 February

Sunrise:
Sunset:

Heavy rain clearing late morning, then bright spells and a few showers, these turning wintry above 400m, as freezing level falls to 500m. Southwest gales turning northwest late morning, then gradually easing

Friday 21 February

Sunrise:
Sunset:

Mostly dry and bright start but rather cloudy and cloud will thicken to bring patchy rain, with strong westerly winds increasing gale force over the tops. Freezing level around 800m at first but then rising.

Updated at:

The summits of each peak form a long ridge with four of the peaks forming a horseshoe shape around the head of the Taf Fechan River which flows away to the south-east. The Brecon Beacons is said to be named after the ancient practice of lighting signal fires (beacons) on mountains to warn of attacks by invaders, or more recently to commemorate public and national events such as coronations or the Millennium.

For ardent mountain climbers, the Brecon Beacons National Park is among the best that Britain has to offer. While it doesn't have some of the headline-grabbing peaks of Snowdonia or the Scottish Highlands, it fits scores of slightly smaller mountains into its relatively compact 519 square mile area. These include the area's highest peak, Pen y Fan, as well as the marginally smaller Corn Du (873 metres). Both offer rather hospitable, anvil-shaped summits to those who reach the top, with plenty of space for rest and photographs, before tackling the descent.

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