Summit today
Is it safe to climb Castell y Gwynt today?
Castell y Gwynt today (updated 06:10, 28 Oct): up to 7°C at the summit, feeling as cold as -3°C, summit wind 45 mph gusting 57 mph, 100% chance of rain. A poor day for the hills. Best day this week: Saturday, summit gusts 16 mph.
Castell y Gwynt weather today
Moderate rain, up to 7°C at the summit, feeling as cold as -3°C, summit wind 45 mph gusting 57 mph, 100% chance of rain. Rated Poor.
Castell y Gwynt weather tomorrow
Thursday 29 October: slight rain, up to 7°C at the summit, feeling as cold as 0°C, summit wind 36 mph gusting 45 mph, 65% chance of rain. Rated Marginal.
Castell y Gwynt weather this weekend
Saturday 31 October: fog, up to 9°C at the summit, feeling as cold as -5°C, summit wind 13 mph gusting 16 mph, 2% chance of rain. Rated Good.
Sunday 1 November: mostly dry, up to 5°C at the summit, feeling as cold as -4°C, summit wind 28 mph gusting 35 mph, 2% chance of rain. Rated Marginal.
Castell y Gwynt summit forecast, next 7 days
| Day | Verdict | High/low | Feels like | Wind/gust mph | Rain or snow |
|---|
| TodayModerate rain | Poor | 7°/4° | -3° | 45/57 | 100% |
|---|
| TomorrowSlight rain | Marginal | 7°/5° | 0° | 36/45 | 65% |
|---|
| Fri 30Fog | Marginal | 8°/-1° | -3° | 37/47 | 2% |
|---|
| Sat 31Fog | Good | 9°/-3° | -5° | 13/16 | 2% |
|---|
| Sun 1Light drizzle | Marginal | 5°/-1° | -4° | 28/35 | 2% |
|---|
| Mon 2Light drizzle | Marginal | 4°/1° | -4° | 28/35 | 2% |
|---|
| Tue 3Light drizzle | Marginal | 6°/-2° | -5° | 28/35 | 0% |
|---|
Castell y Gwynt 14-day weather forecast: days 8 to 14, less certain
| Day | Verdict | High/low | Feels like | Wind/gust mph | Rain or snow |
|---|
| Wed 4Fog | Good | 6°/-2° | -4° | 10/13 | 2% |
|---|
| Thu 5Fog | Good | 5°/-1° | -4° | 11/14 | 2% |
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| Fri 6Fog | Good | 4°/-2° | -4° | 14/18 | 6% |
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| Sat 7Fog | Good | 5°/-2° | -5° | 16/21 | 17% |
|---|
| Sun 8Fog | Good | 5°/-3° | -5° | 14/17 | 26% |
|---|
| Mon 9Fog | Good | 4°/-2° | -4° | 7/9 | 30% |
|---|
| Tue 10Fog | Marginal | 3°/-5° | -8° | 21/26 | 33% |
|---|
Routes up
Routes coming soon
Cloud inversion · 7 days
The chance of standing above a sea of cloud on Castell y Gwynt each morning this week, from overnight temperature, humidity and low cloud below the 972m summit.
Dark sky · 7 days
How dark the sky gets over Castell y Gwynt each night this week, from cloud cover, moonlight and local light pollution.
Snow · 7 days
No snow is forecast at the summit in the next 7 days.
Sun today
Sunrise 07:06, sunset 16:53
9h 46m of daylight. Golden hour ends 07:57 and starts 16:01. From the summit you see the sun 06:59 to 16:59.
Nearby summits
Close to Castell y Gwynt
About Castell y Gwynt
Castell y Gwynt is 972 m (3,189 ft) high with 16 m of prominence. It is in Snowdonia, Wales. It is the 9th highest of the 152 summits Peakify lists in Snowdonia. The nearest summits are Glyder Fach (0.3 km), Tryfan Far South Peak (1.3 km) and Glyder Fawr (1.2 km).
How high is Castell y Gwynt?
Castell y Gwynt is 972 metres high with 16 metres of prominence.
Where is Castell y Gwynt?
Castell y Gwynt is listed in Snowdonia, Wales.
Are there routes for Castell y Gwynt?
Route data is not available for this mountain yet, but the page still shows summit, weather, and location context.
Is it safe to climb Castell y Gwynt today?
Peakify rates each day on the summit Good, Marginal or Poor from the forecast summit wind, gusts, chance of rain and wind chill. Wind of 40 mph or gusts of 65 mph make it Poor; wind of 25 mph, gusts of 45 mph, a 60% chance of rain or a feels-like temperature of -8°C or below make it Marginal. Today's and tomorrow's ratings are at the top of this page. The rating covers the weather only: also check your route, daylight, kit and experience, and in winter whether you need an ice axe and crampons.
What is the weather on Castell y Gwynt tomorrow?
Thursday 29 October: slight rain, up to 7°C at the summit, feeling as cold as 0°C, summit wind 36 mph gusting 45 mph, 65% chance of rain. Rated Marginal.
What is the weather on Castell y Gwynt this weekend?
Saturday 31 October: fog, up to 9°C at the summit, feeling as cold as -5°C, summit wind 13 mph gusting 16 mph, 2% chance of rain. Rated Good. Sunday 1 November: mostly dry, up to 5°C at the summit, feeling as cold as -4°C, summit wind 28 mph gusting 35 mph, 2% chance of rain. Rated Marginal.
What weather information is shown for Castell y Gwynt?
The page includes cached mountain forecast context, snow outlook, dark-sky signals, cloud-inversion information, sunrise, sunset, and summit planning details where available.
Peakify is run by Sam Tyler, who has climbed Yr Wyddfa 22 times. The forecast refreshes every hour; how our forecast works.
