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.
Sunday's Forecast
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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
Sunday 22nd March 2026
Last updated
Sat 21st Mar 26 at
4:00PM
Summary for all mountain areas
A band of patchy rain and low cloud moves southeastwards, improving with rising cloud bases across the Highlands, but brisk winds and below freezing on higher terrain - snow showers mostly in northwest. England & Wales start with low-level fog, hazy sun then cloud lowering, a little rain develops.
Headline for Brecon Beacons
Low-level fog clears, weak sun then cloudier.
How windy? (On the summits)
Variable below 10mph in morning, then west becoming northwesterly 10-15mph, reaching 20mph up to dusk.
Effect of the wind on you?
Small, but feeling breezier late in day.
How Wet?
Precipitation unlikely if any until late
An odd spot of rain possible later in day as high cloud thickens.
Cloud on the hills?
Early fog clearing
Some areas of fog in valleys and lower hill slopes in the morning, briefly drifting upslope, but clearing to leave clear hills. Later in day some cloud caps may drift onto higher western tops.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Mostly sunny morning, some high cloud develops with time from northwest, more overcast later in day. Visibility good, but some haze.
How Cold? (at 750m)
7C, little change all day, dropping a little toward dusk. Feeling like 2C later as breeze freshens.
Freezing Level
Above the summits. Slight frost some valleys at dawn.
Viewing Forecast For
Brecon Beacons
Monday 23rd March 2026
Last updated
Sat 21st Mar 26 at
4:00PM
How windy? (On the summits)
Variable 10mph in morning, becoming SW'ly 15-20mph, tending to strengthen to 25mph afternoon, after dark 35mph+.
Effect of the wind on you?
Mostly small, but tending to feel more blustery with time, deteriorating further into evening and night.
How Wet?
Precipitation not expected
Cloud on the hills?
Little if any
Chance of cloud free summits?
90%
Sunshine and air clarity?
Sunshine tending to weaken as high cloud thickens, may become obscured afternoon. Visibility excellent.
How Cold? (at 750m)
0C rising to 5C by late afternoon. As wind increases, chill factor toward dusk feeling like -3C in exposure.
Freezing Level
Close to freezing above 800m, plus frost inland valleys around dawn. Lifting above freezing to tops by late morning.
Viewing Forecast For
Brecon Beacons
Tuesday 24th March 2026
Last updated
Sat 21st Mar 26 at
4:00PM
How windy? (On the summits)
Southwesterly 40 to 50mph, risk reaching 60mph higher tops for a few hours during day.
Effect of the wind on you?
Arduous to difficult conditions across the hills, mobility challenging in exposure. Significant wind chill.
How Wet?
Drizzly rain in places, risk later heavier
Patchy drizzly rain mostly west and southwestern areas, amounts small much of day. Risk later in day of steadier and heavier rain moving in from the northwest.
Cloud on the hills?
Extensive
Shrouding the hills widely, often from 300-400m upward west and southwest of Brecon. Higher bases mostly above 600m toward Black Mountains and mid Wales.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Generally cloudy, some brighter moments mainly morning and in east Wales. Visibility good where dry below cloud, reducing if in rain, may become poor.
How Cold? (at 750m)
5C, lowering later afternoon to 2C. Feeling like -8 to -12C in the wind.
Freezing Level
Above the summits all day, then from dusk dropping onto tops around 600-700m.
Planning Outlook
A fine start to the week for many places, but strengthening winds and a spell of heavy rain arriving from the northwest during Monday advances southwards into Tuesday. Cold, wintry conditions follow across the mountains into midweek, falling sub-zero across all hills of Britain above 600-700m later Tuesday into Wednesday. Significant chill factor from gale force west then northwesterly winds. Showery hail and snow falling toward lower elevations. High pressure to the southwest then likely rebuilds to settle things again toward next weekend and temperatures will tend to recover. A mixed west to southwesterly flow likely continues to bring more changeable conditions to west and northwest Scotland.