Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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
Tuesday 30th June 2026
Last updated
Mon 29th Jun 26 at
4:03PM
Summary for all mountain areas
Rain and cloud over the hills widely, heavier pulses of rain tending to extend north and eastwards with time through middle of day into afternoon, some local thundery downpours forming. Wind dropping light across much of Highlands, fresh south-southwest winds England and Wales.
Headline for Eryri / Snowdonia National Park
Frequent rain, some heavy bursts. Strong breeze.
How windy? (On the summits)
Southerly 25 to 30mph, or 35mph for a time in morning high western tops; shifting southwest later westerly, or northwesterly by evening, 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, heavy bursts, risk lightning
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, leaving odd lighter showers.
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. Some improvement later in day from west.
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
Mon 29th Jun 26 at
4:03PM
How windy? (On the summits)
Westerly 20mph in morning, then strengthening southwesterly, to 30-35mph afternoon, later toward 50mph.
Effect of the wind on you?
Fairly small in the morning, but becoming more blustery, walking uncomfortable then arduous later in exposure.
How Wet?
Rain mainly later in day
Generally dry in morning, some spots of rain developing onward into afternoon, amounts small and some places further south and east stay dry. Increasing risk later of more persistent rain in west.
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 as rain arrives.
Chance of cloud free summits?
20% rising to 60%; later 20% west
Sunshine and air clarity?
Fairly cloudy, some sun breaks through, then 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 later below freezing on high tops as wind increases.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 2nd July 2026
Last updated
Mon 29th Jun 26 at
4:03PM
How windy? (On the summits)
Westerly, risk 60-70mph dawn-early morning, lessening to 30-40mph during morning, 20-30mph in afternoon.
Effect of the wind on you?
Risk severe conditions from overnight and still difficult well into daytime, walking and balance challenging, slowly improving.
How Wet?
Showers fade
Overnight rain likely clears to leave showery conditions in the morning, becoming well scattered and brief afternoon, likely more often dry.
Cloud on the hills?
Lifting toward or above tops
Covering high terrain fairly widely from dawn, lifting toward highest tops and gradually tending to thin and break, but patches may come and go western tops.
Chance of cloud free summits?
30% rising to 60%
Sunshine and air clarity?
Occasional sun breaking through, most often eastern lower slopes. Visibility good below cloud, some haze toward coastal areas.
How Cold? (at 900m)
9 or 10C, little variation all day. Directly in the stronger winds feeling like -5C on tops, nearer 0C later.
Freezing Level
Above the summits.
Planning Outlook
A changeable westerly Atlantic pattern this week and into the weekend. By later Wednesday into Thursday, a spell of upland gales and more widespread rain. Risk of another windy and wetter spell into Friday. Rain and cloud most frequent over western hills from Lake District northward. Temperatures this week near or slightly below average, with marked wind chill on tops. An improving trend from the south over the weekend, best conditions for Wales and eastern hills elsewhere. Drier and warmer conditions more likely into next week, though southwesterlies may still bring more cloud to the west, some rain mainly northwest Scotland.