カーディフ 8月の天気
カーディフの8月:快適、ときどき雨、空気がきれい — 一年で最も訪れやすい月のひとつ。
2026年9月更新 · ERA5再解析による気候平年値
カーディフCardiff, United Kingdom🇬🇧 イギリス · イギリス諸島 · 都市89
カーディフでは12か月中2位 · 8月に訪れたい旅行先で1413か所中274位 · 快適スコア89/100(Aランク)
- 日中
- 21°C
- 夜
- 14°C
- 雨の日
- 12
- 日照
- 9.7 h
- 湿度
- 79%
- 日の長さ
- 15 h

8月のカーディフについての旅行者の声
Cardiff forum regulars call August the hottest stretch of the year locally but rarely an extreme one: “on occasion can be hot, but rarely uncomfortably so,” with Cardiff singled out as one of the mildest cities in the UK, generally spared the heavier rainfall that hits Wales's upland areas. When rain does come it's “more likely to be light rain or drizzle” than a proper downpour, so a light rain jacket covers most days rather than full waterproofs, though regulars still pack wellies just in case. The one genuine crowd risk: on a rare hot August weekend, beaches fill up fast and parking gets difficult. Our record: 20°C days, 14.3°C nights, 12.2 rain days and a 19.1°C sea — mild rather than hot, matching the “rarely uncomfortably warm” read closely.
カーディフのほかの月
Forum posters describe February across Wales as starting cold, dark and potentially stormy, typically settling somewhat in the second half of the month, with rain and frost likely and snow a real possibility in places. Posters specifically note that Cardiff's sheltered position on the Bristol Channel spares it the extremes seen elsewhere in Wales, making it one of the UK's milder cities where snow stays rare even so - winters here run wet and raw rather than bitterly cold. Posters consistently recommend a hat over an umbrella given how often wind drives the rain sideways, alongside waterproof shoes and thick socks. Posters generally rate February as damp, blustery but comparatively mild for Cardiff specifically relative to the rest of Wales, workable with solid waterproof gear.
Forum posters describe Cardiff's sheltered position on the Bristol Channel as giving it one of the milder climates in the UK, without the temperature extremes some other parts of Britain see, and note that snow in the city itself is rare even in January - it's much more likely up in the higher elevations of the Brecon Beacons. Posters are consistent that mild and wet describes a typical south Wales January far better than cold and snowy, with most of the region's heaviest rain actually concentrated in the October-through-January stretch. Posters flag the short winter days as a real factor, with darkness for around 15 hours. Posters generally rate Cardiff as a fine January destination for its castle, museums and Cardiff Bay, while noting that bus service to surrounding holiday areas runs more limited this time of year than in peak season.
The forum's honest summary of a Cardiff July is that it could be very hot, could be chilly, or could rain without stopping — Welsh weather being "entirely unpredictable" — but they rate July as the more reliable month than August if the dates are yours to choose, particularly for hiking. What July reliably is not is oppressive: averages sit near 20°C, which regulars count as an advantage over Mediterranean destinations in high summer. Rain lands on around a dozen days across the month, so the standing packing advice is light summer clothes plus a thin sweater and a light waterproof.
地図のカーディフのカードから自分のメモを追加できます。
カーディフの気候平年値 — 8月
ERA5再解析による月平均値です。AQIはその月の平均US AQI(米国大気質指数)です。
8月のカーディフの混雑
その場所自体の混み具合 — 学校休暇や大型連休、編集部がタグ付けした月、そして天気の良さによる人気の高さ。快適スコアには含まれません。
混雑イギリスのSummer holidays、主な訪問国のうち6か国で学校休暇(推定)
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ピークの混雑混雑ショルダーシーズン閑散
カーディフの天気が良い月
この旅行先自身の一年間の快適スコアでランキングしています — 混み具合とは別のものです(上の「混雑」を参照)。
天気が最高カーディフの天気がピークを迎えるのは6月〜8月で、特に良いのは7月ごろです。
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天気が最高天気はまずまず天気が厳しい
近くで開催中のイベント
カーディフから300 km以内 — 日帰りやちょっとした移動で行けて、今月何かがある場所です。快適スコアには含まれません。
カーディフはどこにある?
地図を読み込み中…
8月のカーディフ — よくある質問
- 8月はカーディフを訪れるのに良い時期ですか?
- カーディフの8月:快適、ときどき雨、空気がきれい — 一年で最も訪れやすい月のひとつ。SeasonMapの快適スコアでは、カーディフの12か月中2位です(89/100)。
- 8月のカーディフはどんな天気ですか?
- 8月のカーディフは、平均最高気温21.2°C、最低気温13.7°C、降水量は約77.2 mmで、雨の日はおよそ11.7日です。
- 8月のカーディフの大気質はどうですか?
- 8月のカーディフの米国大気質指数(US AQI)は、平均約32です。
300 km圏内:BristolのBalloon Fiesta(8月7日〜9日)、BathのRoman Baths open late(7月1日〜8月31日)。