Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Wednesday's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
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.
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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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
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.
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
Wednesday 5th August 2026
Last updated
Tue 4th Aug 26 at
4:00PM
Summary for all mountain areas
Increasingly gale-force winds over high terrain in northern England and near west coast of Scotland; wind strengthening widely over the Highlands. Areas of persistent rain and heavy downpours becoming widespread for the Highlands, local thunderstorms. Frequent rain for northern England, less for Wales.
Headline for Eryri / Snowdonia National Park
Windy, gale-force northern tops. Rain on and off.
How windy? (On the summits)
West-southwesterly, 30 to 40mph, strongest toward north, rising to 50mph at least in gusts on higher northern tops middle of day into afternoon; then moderating a little through to dusk.
Effect of the wind on you?
Strenuous walking on high terrain, making balance challenging on ridges, frequent buffeting and gusts may knock you off your feet in places. Marked wind chill.
How Wet?
Showery rain
Rain most common on western hills in the morning, amounts fairly small, but through middle of day into afternoon showers more widely for a time, odd heavier showers passing eastwards. Drier later in northwest.
Cloud on the hills?
Most persistent west
Covering many higher slopes much of the day above 600-800m, lowest and most persistent west coasts and during rain. Some breaks forming where dry in east.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Brief sun breaking through mainly east. A general slight haze, reduced further in rain.
How Cold? (at 900m)
8 or 9C, little change all day. Feeling near or below freezing in the stronger wind.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Thursday 6th August 2026
Last updated
Tue 4th Aug 26 at
4:00PM
How windy? (On the summits)
West-northwesterly 25mph, gusts over 30mph for a few hours from dawn, tending to ease to 20mph midday into afternoon.
Effect of the wind on you?
Becoming fairly small, but breezy and rather cool in the morning, may start to affect ease of walking in exposed spots.
How Wet?
Early showers fade
Showers from dawn into early morning, tending to fade to be often dry, rare light showers into middle of day onward. A little light rain may return into night.
Cloud on the hills?
Lifting and breaking above tops
Cloud banks above 700-800m in the morning, most common toward west. Lifting to higher tops then largely clearing the hills, odd patches on highest summits.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Patchwork of cloud and sun. Visibility very good.
How Cold? (at 900m)
7C rising to 9C afternoon. Feeling close to freezing if exposed to early wind on tops.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 7th August 2026
Last updated
Tue 4th Aug 26 at
4:00PM
How windy? (On the summits)
Southwesterly 10-15mph, sometimes less.
Effect of the wind on you?
Small.
How Wet?
Early drizzle
Drizzle on high tops and western slopes nearest Cardigan Bay for a few early hours, this soon fading for dry hills.
Cloud on the hills?
Lifting to summits
Most high terrain shrouded early with varied lower patchy banks, most extensive west with banks to 300-400m. Cloud lifts to largely just banks over high summits afternoon, some clear windows appearing.
Chance of cloud free summits?
Rising to 50%
Sunshine and air clarity?
Starting mostly cloudy, breaks increasingly forming for extended sunny windows. Very good visibility.
How Cold? (at 900m)
8C rising to 11C.
Freezing Level
Above the summits.
Planning Outlook
West to southwesterly winds prevail later this week and into the weekend and further weather fronts will come in off the Atlantic to bring low cloud and rain especially to western mountains in Scotland. A brief ridge of high pressure this Thursday offers a better day with the wind lessening for a time and fewer showers, but winds likely strengthen again by Friday, toward gale force over northwestern Scottish mountains at least. Heavy rain likely affects western Scotland on Saturday, becoming widely showery into Sunday. A brief window of improvement is indicated early next week, but a generally unsettled theme likely continues into mid-month.