Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Sunday'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.
Click an icon for more information or click here for a key to all icons.
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
Sunday 28th June 2026
Last updated
Sat 27th Jun 26 at
4:00PM
Summary for all mountain areas
Strengthening southwesterly winds, reaching gale force over western Scottish mountains, soonest near Skye. Much fresher everywhere, rather chilly on tops in exposure to wind. Some early rain, improving as cloud lifts and breaks, but scattered showers move east across the Highlands into the afternoon.
Headline for Eryri / Snowdonia National Park
Breezy. Early patchy rain, cloud lifts to tops, breaks form.
How windy? (On the summits)
West-southwesterly 20-25mph, sometimes gusting 30mph over tops, briefly stronger 35mph around dawn; later in day again more sustained 30mph and trending westerly.
Effect of the wind on you?
Fairly small for periods, but breezy and feeling fresh, gusts at times impact ease of walking, more consistently impeded at dawn and again later in the day.
How Wet?
Early showery rain, then substantially dry
From before dawn, several bands of rain pass west-to-east, brief heavier falls at first, soon clearing during morning to become largely dry, odd light spots of rain drifting onto western hills.
Cloud on the hills?
Lifting and breaking through morning
Fairly extensive early morning, to most middle slopes, or lower western slopes with ragged lower patches at first. During morning, a rising and breaking trend, to banks above 800m with increasing breaks by afternoon.
Chance of cloud free summits?
20% at first, rising middle of day to 70%
Sunshine and air clarity?
Mostly cloudy start breaking into a patchwork of cloud and sun Visibility becoming very good.
How Cold? (at 900m)
10 or 11C, cooling later afternoon to 9C. Feeling like 3C directly in breeze on tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Monday 29th June 2026
Last updated
Sat 27th Jun 26 at
4:00PM
How windy? (On the summits)
Westerly trending southwesterly 10-15mph, stronger early, sustained 20mph around dawn.
Effect of the wind on you?
Mostly small, some breezy moments early in exposure.
How Wet?
Patchy rain, afternoon showers, drier east
Light patchy rain drifts onto west slopes from dawn, mostly light with dry windows, more frequent on higher west aspects. Some risk of showery bursts forming afternoon. Very little rain reaches east hills.
Cloud on the hills?
Lifting to high terrain with breaks
Banks of cloud at multiple elevations at dawn, most extensive west aspects where banks may reach lower slopes. Lifting through morning, to largely just banks over tops afternoon, and breaks probable; briefly lower again if showers occur.
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)
9C rising to 12C.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Tuesday 30th June 2026
Last updated
Sat 27th Jun 26 at
4:00PM
How windy? (On the summits)
Southerly 20 to 25mph, at times 30mph higher western tops; shifting southwest later westerly, speeds varying.
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 throughout the day, periods of constant rain, some heavy bursts tending to drift eastwards, risk of isolated thunder. May tend 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 may 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.
Planning Outlook
A westerly Atlantic pattern dominates the new week: high pressure south and low pressure north will bring alternating periods of rain punctuated by bright sunshine. Wind generally on the strong side with mild to sometimes warm temperatures, though cooler and windier spells at times produce significant wind chill on Scottish tops. Western hill groups from Lakeland northward will see the most cloud and patchy rain, while east and southern areas likely drier and sunnier. This pattern is likely to continue into next weekend.