Mountain weather

Brecon Beacons

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Brecon Beacons Mountain weather forecast table


High confidence for a more settled weekend of weather but some uncertainty about the timing of frontal rain on Monday.

Mountain hazards

Mountain weather hazards

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

hazard Severe chill effect
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.
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 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 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

Cloudy with some sunny intervals, westerly winds.

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

A few strong gusts at first on Friday but winds gradually easing, a significant wind chill is likely.


Some bright spells but the risk of a few wintery showers blowing through on the strong westerly winds. These will push through quite quickly and some decent sunny spells are also likely.

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

Generally 80%, 40% in showers.


Visibility will generally be very good but in any snow showers cloud may lower to around 500m temporarily, in any heavier snow showers visibility will become very poor for a time as the shower moves through.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
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.


Mountain weather information


A mixture of sunny spells and cloud with a few wintery showers.

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

80%, a few patches of low cloud will cover the tops in showers.

Maximum wind speed expected

Northwesterly winds 15-20mph.


  • At 600m Minus 2 falling to minus 5 Celsius.
  • Valley Zero rising to plus 4 Celsius.
  • Freezing level 400m falling to 100m.


Generally very good visibility becoming poor for a time as showers pass through, patches of cloud at 500m and above likely in showers.

Mountain weather information

Sunday 24 January


A fine dry day with plenty of winter sunshine. Southwest becoming northwesterly winds. Freezing level 100m rising to 400m.

Monday 25 January


A dry and bright start on Monday but becoming increasingly cloudy later in the day, perhaps some light rain in the west but the end of the day. Freezing level 400m rising to 1000m later in the evening.

Tuesday 26 January


Some rain and southwesterly winds, milder than of late.

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.