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.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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
Tuesday 19th May 2026
Last updated
Mon 18th May 26 at
3:55PM
Summary for all mountain areas
Frequent rain nearly everywhere all day, the rain most persistent west where hill-cloud fills in to low slopes with little improvement. A risk of localised hail and thunder in afternoon showery rain, increasingly wet underfoot, and with slippery rock surfaces. Very windy, gusty gales early including downslope.
Headline for Brecon Beacons
Often raining; very windy, moments of gales
How windy? (On the summits)
Southwesterly 35-45mph most of the day, gusty over tops and high passes, particularly early when gusts may reach downslope. A few hours of slightly lighter wind possible in the early hours, but always at least 25mph. Stronger wind likely overnight.
Effect of the wind on you?
Walking arduous in exposure most of the day, buffeting gusts over tops and passes and wind chill; particularly early when strongest gusts will greatly challenge balance.
How Wet?
Periods of rain, sometimes heavy
Clusters of showery rain drive in from the southwest through the day, often with heavy bursts and a risk of isolated hail and thunder. West slopes and high tops stay drizzly even between showers. A few morning hours may be drier. Wet underfoot and slippery rock surfaces.
Cloud on the hills?
Fairly extensive
Extensive to low slopes at dawn. Through morning, tending to lift, some breaks forming towards east Wales up to 700m on north slopes. West and southern slopes remain in cloud, at times to low slopes; any breaks above 600m rare and brief.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Glimpses of sun in the morning, then later in the day too, otherwise largely cloudy. Visibility often poor due to rain and a building haze.
How Cold? (at 750m)
7 to 9C, mildest northern slopes and particularly towards the Black Mountains. Feeling like -5 to -8C in direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Wednesday 20th May 2026
Last updated
Mon 18th May 26 at
3:55PM
How windy? (On the summits)
West-southwesterly 25-40mph, risk quite gusty over high terrain.
Effect of the wind on you?
Walking impeded in exposure and often strenuous and feeling chilly; considerable buffeting possible over high terrain.
How Wet?
Some drizzly rain
Raining from before dawn, but through morning the rain likely eases, becoming light and patchy with dry periods. High summits and west slopes may remain in a drizzly cloud into the afternoon.
Cloud on the hills?
Fairly extensive particularly west
A sheet of cloud shrouds the hills at dawn, to lower western slopes. Bases slowly lift towards 700m on east and northern slopes, a few high breaks possible later in the day. High tops will struggle to clear, and west/southern slopes stay shrouded above 500-600m.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Glimpses of sun. Visibility starts poor, improving as cloud and rain ease.
How Cold? (at 750m)
7C rising to 10C, mildest Black Mountains. Feeling below freezing in strongest direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Thursday 21st May 2026
Last updated
Mon 18th May 26 at
3:55PM
How windy? (On the summits)
Southerly 20-30mph. Strongest winds west, and also quite gusty, including downslope to the north early.
Effect of the wind on you?
Walking strenuous in exposure during strongest wind with a cool feeling. Considerable buffeting from gusts.
How Wet?
Drizzle fades
Drizzly and damp in early cloud, the drizzle possibly to middle slopes or lower on southern slopes. Drizzle rises to just the tops through morning as cloud lifts, then largely dry afternoon.
Cloud on the hills?
Extensive early, improving
Cloud shrouds the hills to low slopes at dawn, as low as 200m southern aspects. Bases rise after sunrise, approaching 700-800m southern aspects, northern aspects soon clearer. By later afternoon, breaks off summits increasingly likely.
Chance of cloud free summits?
10%, later rising to 60%
Sunshine and air clarity?
Overcast and dull with poor visibility early. Sunny glimpses breaking out through afternoon with improved visibility.
How Cold? (at 750m)
12 to 14C. Feeling like 5C in strongest wind.
Freezing Level
Above the summits.
Planning Outlook
Damp southwesterlies establish by mid-week; regular periods of rain with only glimpses of sunshine. Wettest on western hills where drizzle may persist between rain and low cloud clings to the hills. Expect slippery exposed rock surfaces and rare (if any) exposed tops in Scotland before the weekend. Indications of rising pressure later in the week, bringing milder and drier conditions to England and Wales. However, some drizzle and low cloud may continue to affect western hills, outbreaks of rain as well, but rising chances of clear hills. Pressure may continue to rise into the weekend, allowing for warmer and sunnier conditions, but some fronts and lingering humidity will continue to bring cloud and rain here and there.