Eryri / Snowdonia National Park
Includes all summits in the the northern half of Wales from Pumlumon northwards.
Today'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.
Mostly dry, partly cloudy
Dry most or all day. Variable amounts of sun and cloud, occasional patches drifting onto some higher slopes, but most summits often clear.
Warm
Comfortable temperatures on the hills, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Strong sunshine
High UV levels, beware of sunburn. Warm temperatures, rising above 20C in the valleys, beware of dehydration.
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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.
Mostly dry, partly cloudy
Dry most or all day. Variable amounts of sun and cloud, occasional patches drifting onto some higher slopes, but most summits often clear.
Warm
Comfortable temperatures on the hills, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Strong sunshine
High UV levels, beware of sunburn. Warm temperatures, rising above 20C in the valleys, beware of dehydration.
Viewing Forecast For
Eryri / Snowdonia National Park
Friday 20th September 2024
Last updated
Thu 19th Sep 24 at
1:08PM
Summary for all mountain areas
Sunny, warm and calm with only morning valley fog in the Highlands. Low cloud southern Scotland and northeastern England, inversion, tops above the cloud. Sunny Lake District. East Wales under low cloud, west including Snowdon sunny & dry. Showers in Brecon Beacons. Locally gusty Welsh and English hills.
Headline for Eryri / Snowdonia National Park
Mostly dry, sunny on highest tops, cloud lower down
How windy? (On the summits)
Easterly 20 or 25mph. Locally gusty on elevated passes.
Effect of the wind on you?
Fairly small, but gusts affecting comfortable walking.
How Wet?
Risk of a little rain
Risk low, but there may be one or two periods of showery rain toward the evening toward the south - possibly a heavy burst with very low risk an isolated thunder. First half of the day surely dry, rain very unlikely on Snowdon/Yr Wyddfa.
Cloud on the hills?
Lower slopes often covered at first
Higher, particularly western & northern mountains clear all day. Lower down, cloud between 200m and 400-600m (top of the cloud) extensive east Wales, more broken west.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Patches of sunshine east Wales, very sunny in the west. Hazy.
How Cold? (at 900m)
13C, sometimes colder lower down where in cloud.
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Saturday 21st September 2024
Last updated
Thu 19th Sep 24 at
1:08PM
How windy? (On the summits)
East to northeasterly, 15 to 20mph. Sudden gusts up to 40mph through elevated passes & west of major ridges.
Effect of the wind on you?
Small, but gusts locally may significantly affect your balance and stability.
How Wet?
Showers, most south, locally heavy
Frequent showers during the afternoon, highest risk east toward the south. Moderate risk thunder.
Cloud on the hills?
Hills covered at times on various levels
Valley fog in the morning below 500m. During the day fog slowly dispersing, but afternoon cloud possibly coming and going on various higher levels.
Chance of cloud free summits?
50%, tops in the morning cloud-free
Sunshine and air clarity?
Patchwork of sun, clouds most frequently in the east and southeast. Good visibility, some haze in the air.
How Cold? (at 900m)
11 to 13C
Freezing Level
Above the summits.
Viewing Forecast For
Eryri / Snowdonia National Park
Sunday 22nd September 2024
Last updated
Thu 19th Sep 24 at
1:08PM
How windy? (On the summits)
Northeast to southeasterly, mean wind 10 to 25mph, but gusts may exceed 40mph locally. Strongest in the south.
Effect of the wind on you?
Variable, fairly small at times but in exposed locations gusts affecting comfortable walking and stability.
How Wet?
Risk showers, perhaps with thunder
Possible thundery and at times heavy showers, risk highest toward the south.
Cloud on the hills?
Hills partly in cloud
Cloud covering the hills toward the south, on Snowdon range except for morning mist mostly hills clear at start, perhaps getting covered during the day.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Patchy sun at start, increasingly murky and dull from the southeast during the day. Haze in the air.
How Cold? (at 900m)
9 or 10C
Freezing Level
Above the summits.
Planning Outlook
High pressure conditions with a lot of sunshine, warm temperatures and calm winds continue until early next week in Scotland and northern England. In Wales and Peak District during the weekend heavy showery bursts of rain, possibly thunderstorms. On Monday clouds and brief rain in Scotland. Northern England mostly dry, Peaks and Wales still wet. On Tuesday most likely dry day, before a deep low pressure system arrives on Wednesday/Thursday, bringing strong cooling and a lot of rain to most British mountains. Toward next weekend probably cold and wet, with again some snow on high tops.