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
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Cool to mild
Air temperature 8 to 12C 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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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Cool to mild
Air temperature 8 to 12C 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 10th June 2025
Last updated
Mon 9th Jun 25 at
4:30PM
Summary for all mountain areas
A fine day developing as overnight rain fades and cloud banks lift and break to reveal patchy sunshine. Early strong breezes easing gradually. Patchy cloud may come and go on higher western tops in the Highlands. Slower to improve in south Wales.
Headline for Brecon Beacons
Strong breeze easing. Drizzly low cloud morning, improving.
How windy? (On the summits)
Westerly 25-30mph around dawn, or stronger just before gusts over 35mph. Soon dropping during morning to 15-20mph, then 10mph afternoon, or less later; turning south-southwesterly into night.
Effect of the wind on you?
Walking impeded at first - stability may be challenged around dawn on high tops -feeling chilly, but improving, becoming increasingly small.
How Wet?
Occasional drizzly rain morning
Remnants of overnight rain leaves patches of drizzle during the morning, brief light showers, most frequent western areas. Fading into middle of day to be dry for the afternoon.
Cloud on the hills?
Extensive morning, improving afternoon
Widespread cloud from middle slopes up in morning, down to low slopes western hills. Bases rise to upper slopes during morning, gradually breaking up during middle of day to leave tops increasingly clear afternoon.
Chance of cloud free summits?
Less than 10% early, rising to 80% afternoon.
Sunshine and air clarity?
Cloudy morning, misty for a few hours, improving gradually from north, leaving patchwork of sun and cloud into afternoon, visibility becoming excellent.
How Cold? (at 750m)
10C, rising to 12C. Little change, or slight rise further after dark.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Wednesday 11th June 2025
Last updated
Mon 9th Jun 25 at
4:30PM
How windy? (On the summits)
Southerly 15-20mph. Gradually shifting southeasterly, rising towards a gusty 30mph or higher toward evening onward.
Effect of the wind on you?
Fairly small, though increasingly gusty with time. Walking impeded or strenuous later with buffeting gusts.
How Wet?
Dry during daylight, chance rain late
Chance a few spots of rain may quickly come and go by evening, possibly an odd heavy burst coming up from south by dusk.
Cloud on the hills?
Morning cloud breaking, clearing summits
High terrain often shrouded early with bases drifting well downslope in the south. Patchy breaks soon increase and cloud bases lift, leaving mostly clear tops by afternoon.
Chance of cloud free summits?
Becoming 90%
Sunshine and air clarity?
Glimpses of sun becoming frequent or mostly sunny. Visibility becoming excellent.
How Cold? (at 750m)
11C rising to 16C. Little drop in temperature, if any, into night.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Thursday 12th June 2025
Last updated
Mon 9th Jun 25 at
4:30PM
How windy? (On the summits)
Southeast then southerly, 25 to 40mph, risk gusts 50mph at first; speeds may ease, but gusty around heavy rain.
Effect of the wind on you?
Very blustery, walking arduous on high terrain, affecting balance on exposed tops and ridges especially morning.
How Wet?
Thunderstorms likely soon develop
Sporadic bursts of rain from elevated cloud from dawn. Increasing threat possibly soon of widespread heavy rain developing from the south, lasting several hours, risk thunderstorms; may clear northward during afternoon.
Cloud on the hills?
Extensive with varied patches in rain
Possible clear for a time, but as rain develops, cloud filling in across the hills, in places patches from forest canopies upward during and after heavy bursts. May improve during afternoon.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Mainly overcast, hazy, poor visibility in rain. Some sun may break through later in the day, visibility may improve.
How Cold? (at 750m)
15C from dawn, but then little change; small variation with height in morning.
Freezing Level
Above the summits
Planning Outlook
Much warmer and feeling humid as winds shift southerly through Wednesday. Low pressure to the west and a front pushing in brings a risk of thunderstorms on Thursday, soonest in Wales, advancing northeastwards over England and Scotland likely afternoon into evening - some uncertainty of timing. Low pressure is likely to linger later week into weekend - initially staying warm and humid, bringing an ongoing risk of thundery downpours, mixed with sunnier spells. Likely cooler and windier with time over the weekend. Southwesterlies then prevailing with rain at times, most over western mountains into early next week, but a trend toward higher pressure building from the south with drier conditions emerging.