Brecon Beacons
Includes all higher summits in the southern half of Wales: the Bannau Brycheiniog / Brecon Beacons National Park, southern Cambrian Mountains and highest Preseli hills.
Monday's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Cool to mild
Air temperature +5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Cool to mild
Air temperature +5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Viewing Forecast For
Brecon Beacons
Monday 26th May 2025
Last updated
Sun 25th May 25 at
4:00PM
Summary for all mountain areas
Gales widespread over the mountains, during afternoon in Wales strengthening to become increasingly severe on tops. Showery bursts, most frequent in the west, hail and isolated thunder. Merging into constant and heavier rain for England, Wales and southwest Scotland later.
Headline for Brecon Beacons
Windy, severe gales later; showers then heavier rain.
How windy? (On the summits)
Southwesterly 30mph, strengthening to reach 45mph during afternoon, 55-60mph on highest tops into evening.
Effect of the wind on you?
Frequent buffeting across the hills, making walking uncomfortable on exposed terrain; deteriorating further to become widely difficult later. Significant wind chill.
How Wet?
Occasional showers; constant rain later
Showers mostly toward coast in west at first, extending eastwards to give showery rain on and off during day. Through afternoon, developing into more persistent rain, setting in heavier, continuing into evening.
Cloud on the hills?
Mostly high tops, lowering to become extensive
Patches of cloud likely to come and go over higher tops, particularly western areas, bases 600-800m. Higher breaks common in east. Lowering generally over higher terrain as rain becomes persistent.
Chance of cloud free summits?
40%, by later afternoon 10%
Sunshine and air clarity?
Occasional sun mostly east in morning. Visibility very good for periods, briefly poor in showers, reducing generally to poor later.
How Cold? (at 750m)
4C rising to 6 or 7C. Wind chill feeling like -5C on tops.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Tuesday 27th May 2025
Last updated
Sun 25th May 25 at
4:00PM
How windy? (On the summits)
West to southwesterly 15-25mph early morning. Strengthening rapidly to 50mph middle of day into afternoon.
Effect of the wind on you?
Fairly small early morning, but deteriorating conditions afternoon, becoming difficult as gales develop and increase.
How Wet?
Heavy rain setting in
Dry start, for longest in east, but rain moving in from southwest - some uncertainty of timing - but threat of heavy rain soon setting in, continuing afternoon into evening.
Cloud on the hills?
Becoming extensive
Patches of cloud mostly higher and western tops in the morning; most tops clear or clearing for a few hours. As rain develops, cloud lowering to blanket hills to increasingly low levels.
Chance of cloud free summits?
Dropping to 10% as rain sets in
Sunshine and air clarity?
Any weak sun at dawn giving way as high cloud builds, soon overcast. Visibility starting very good, then poor as rain develops.
How Cold? (at 750m)
6C rising to 9C. Feeling colder as wind speeds increase, later may feel sub-zero where exposed.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Wednesday 28th May 2025
Last updated
Sun 25th May 25 at
4:00PM
How windy? (On the summits)
West to northwesterly 20 to 25mph, risk 30-35mph for a few hours from dawn.
Effect of the wind on you?
Starting to affect comfortable walking where exposed on higher terrain. More blustery at first. Marked wind chill.
How Wet?
Showers mostly early in day
Showery rain from overnight may continue into early morning before clearing, leaving brief passing light showers. Into night, risk of heavy rain moving in from the west.
Cloud on the hills?
Lifting and clearing
Patches capping some high tops in the morning, possibly fairly extensive at dawn, mostly higher western hills. Lifting to clear the tops by middle of day.
Chance of cloud free summits?
70% rising above 90%
Sunshine and air clarity?
Broken cloud and sun; cloud filling in for periods, sunnier later near coasts. Visibility very good.
How Cold? (at 750m)
5C rising to 8C. Wind chill feeling sub-zero in morning, risk nearer -5C at first.
Freezing Level
Above the summits
Planning Outlook
Changeable conditions this week with low pressure and frontal systems passing west to east. West to southwesterly winds prevailing, speeds varied, but gale force for periods on the mountains. Spells of rain and showers, some periods of sustained heavier rain. Cloud often shrouding higher terrain. Better toward the east and northeast of Scotland. Generally rather cool for Scotland, near freezing on highest summits early in week, then a little milder, or warmer further south over England & Wales. Some improvements in conditions especially in southern areas as pressure builds at times, but mixed westerlies are likely to prevail into the start of June.