Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Monday'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.
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.
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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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.
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.
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
Eryri / Snowdonia National Park
Monday 29th June 2026
Last updated
Sun 28th Jun 26 at
4:00PM
Summary for all mountain areas
Southwesterly breezes, strongest in the morning. Cloud covering many western hills, some drizzly rain and light showers, mostly western Scotland. Cloud higher and more broken toward east. Some improvements in the west as cloud base rises, some breaks forming afternoon. Rain develops from west into night.
Headline for Eryri / Snowdonia National Park
Breezy. Often dry, cloud lowest in west, improving.
How windy? (On the summits)
West turning southwesterly, 20-25mph dawn to early morning, easing to 15-20mph by middle of day, occasional 20-25mph on high western tops afternoon, freshening a little more widely by evening, turning southerly 25-30mph.
Effect of the wind on you?
Ease of walking impacted in exposure early, easing to fairly small effects. Later feeling more blustery again and may be more noticeable in west.
How Wet?
Largely dry, some early spots in west
Light patchy rain drifts onto west slopes from dawn, mostly amounting to very little, largely dry east hills. Generally dry into afternoon, low chance a light shower. Later evening patchy rain spreads in from southwest, some heavier.
Cloud on the hills?
Lifting to high terrain with breaks
Banks of cloud at multiple elevations at dawn, most extensive west aspects where banks to mid-slopes. Lifting through morning, to largely just banks over tops afternoon, and breaks form.
Chance of cloud free summits?
40% rising to 70%
Sunshine and air clarity?
A patchwork of cloud and sunshine, some variable thin high cloud around. Very good visibility.
How Cold? (at 900m)
8C rising to 11C afternoon. Feeling near freezing on high tops in strongest wind in morning.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 30th June 2026
Last updated
Sun 28th Jun 26 at
4:00PM
How windy? (On the summits)
Southerly 25 to 30mph, or 35mph for a time high western tops; shifting southwest later westerly, varying 20-30mph.
Effect of the wind on you?
Feeling blustery and cool over higher mountains. In places gusts may affect balance on exposed ridges.
How Wet?
Frequent or persistent rain, some heavy
Areas of rain and showers for much of the day, periods of constant rain, some heavy bursts tending to drift eastwards, chance of isolated thunder. Tending to clear from west coast later in day.
Cloud on the hills?
Fairly extensive
Shrouding most high terrain all day, varying bases around rain, some ragged patches to lower slopes. Local breaks form higher up Carneddau to Bala groups.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Generally cloudy, a little weak sun mainly morning in east, then late in day west. Visibility often reduced by rain, poor for periods; intermittently very good if dry.
How Cold? (at 900m)
9 or 10C, little variation all day. Feeling like 0C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Wednesday 1st July 2026
Last updated
Sun 28th Jun 26 at
4:00PM
How windy? (On the summits)
Westerly 15-20mph in morning, then strengthening southwesterly, to 25-35mph afternoon, later risk 40-50mph.
Effect of the wind on you?
Fairly small in the morning, but becoming more blustery, walking uncomfortable later, possibly arduous in exposure.
How Wet?
Risk of rain later in day
Generally dry much of the day, except for an odd isolated shower. Later afternoon-evening, increasing risk of rain moving in from west, may be patchy.
Cloud on the hills?
Fairly extensive, lifting, some breaks
Covering many hills in the morning, to some mid-slopes in west. Tending to lift and break toward upper slopes, clearing best inland and toward east. Lowering in west later if rain arrives.
Chance of cloud free summits?
20% rising to 60%
Sunshine and air clarity?
Fairly cloudy, some sun breaks through, later giving way to thickening high cloud. Visibility very good below cloud.
How Cold? (at 900m)
8 or 9C, little variation all day. Feeling near or possibly below freezing on high tops as wind increases later.
Freezing Level
Above the summits.
Planning Outlook
A changeable westerly Atlantic pattern dominates this week. Western hill groups from Lakeland northward will see the most cloud and rain, while east and southern areas are drier and sunnier. A spell of stronger winds and more widespread rain likely develops later Wednesday to early Thursday. Possibly another windy and wetter spell into Friday. A rather cool and windy westerly pattern is likely to continue into next weekend with showery rain. Drier and warmer conditions are indicated into the week of 5th July, though southwesterlies may still bring more cloud to the west, some rain in northwest Scotland.