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.
Today'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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Clear
Excellent or superb visibility, no navigation issues.
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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Clear
Excellent or superb visibility, no navigation issues.
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 20th May 2025
Last updated
Mon 19th May 25 at
4:30PM
Summary for all mountain areas
Mostly sunny and warm in Scotland; some patchy low fog in the north at dawn. Sunny too in England and Wales, fair weather cloud building afternoon with localised showers. Local heavy bursts later in western areas (including Galloway) with chance of isolated lightning, showers more scattered across the Pennines. Fairly light wind for all.
Headline for Brecon Beacons
Showers forming afternoon, isolated heavy bursts
How windy? (On the summits)
Variable direction, 10mph or less. Brief gusts around showers in the afternoon. Shifting generally west to northwesterly later afternoon into evening with breezes up to 15mph.
Effect of the wind on you?
Negligible
How Wet?
Showers forming afternoon, local heavy bursts
Chance of an odd spot of rain from high cloud in the morning in eastern areas. Increasing risk of showers forming through the afternoon; isolated heavy bursts with chance of lightning later afternoon.
Cloud on the hills?
Forming mainly in showers
Patchy mist on some slopes early morning, notably in the east if rain here; soon dissipating. Cloud then largely above the hills. Where showers form, cloud lowering onto tops, fleeing patches to lower elevations.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Sunshine through high cloud; patchy cloud filling in and high cloud thickening through the day for only glimpses of sun later. Visibility excellent, some early haze.
How Cold? (at 750m)
9C rising to 11C.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Wednesday 21st May 2025
Last updated
Mon 19th May 25 at
4:30PM
How windy? (On the summits)
Northerly 15 to 20mph. Strongest winds afternoon into evening, possibly up to 25mph.
Effect of the wind on you?
Fairly small, though becoming blustery as evening approaches.
How Wet?
Localised showers
Local showers in the morning soon clear, though may persist for a time east. Slow moving localised showers form afternoon, drifting southward. Risk of heavy spells.
Cloud on the hills?
Little if any
Patches forming locally in showers at varied heights, otherwise the hills generally clear.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Patchwork of cloud and sun; more sun for most into later afternoon. Visibility excellent.
How Cold? (at 750m)
7C rising to 11C.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Thursday 22nd May 2025
Last updated
Mon 19th May 25 at
4:30PM
How windy? (On the summits)
Northwesterly 15-25mph. Always strongest westernmost mountains.
Effect of the wind on you?
Fairly small, walking at times lightly impeded in the west.
How Wet?
Outbreaks of showers afternoon
Outbreaks of showers in the afternoon, risk of strong or extended spells.
Cloud on the hills?
Little or none
Hills largely cloud-free. Chance of mist in sheltered valley bottoms in the early morning.
Chance of cloud free summits?
90%
Sunshine and air clarity?
A patchwork of sunshine most of the day. Excellent visibility.
How Cold? (at 750m)
9 or 10C. Warming up to 12C south.
Freezing Level
Above the summits
Planning Outlook
High pressure weakens into midweek. Some passing rain/showery bursts into Wales and England on Wednesday will lead to a mostly dry Thursday and Friday. A northerly breeze will lower temperatures; freezing levels will lower to high terrain of north and east Scotland for a time. In the short-term, ground conditions remain extensively dry, water courses are very low and the fire risk is very high. Weather turns very unsettled into the weekend as a strong frontal system arrives from the west on Friday night, bringing heavy rain and strong winds to all areas. Showers and a brisk wind will follow into the weekend.