カンクン 8月の天気
カンクンの8月:猛暑、雨が多い、空気がきれい — 雨の日20日が気にならなければ悪くない時期。
2026年9月更新 · ERA5再解析による気候平年値
カンクンでは12か月中9位 · 8月に訪れたい旅行先で1413か所中666位 · 快適スコア80/100(Aランク)
- 日中
- 32°C
- 夜
- 25°C
- 雨の日
- 20
- 日照
- 11.2 h
- 湿度
- 80%
- 日の長さ
- 13 h

カンクンの8月のようす
One of the wettest months, hot and humid, with a real hurricane risk and the lowest prices of the year.
typhoonlow season
確度:high
8月のカンクンについての旅行者の声
Cancun-forum threads asking about August hurricane season are consistent the odds of an actual storm hitting are low through most of the month, ticking up only toward the very end as the wider season builds toward its September-October peak. A typical day is described as sunny, hot and humid, with forecasts often calling for rain that doesn't necessarily show up - and when it does arrive, it's usually overnight or a brief afternoon burst rather than an all-day washout. Posters call the ocean warm enough to feel almost bath-like, a genuine plus for anyone prioritizing swimming and snorkeling over cooler water. Regulars are consistent that most August trips proceed entirely normally, and recommend simply keeping half an eye on the tropical outlook rather than avoiding the month outright. The record: 31.8C days feeling like a punishing 37C, 25.2C nights, a 28.5C sea and 80 percent humidity.
カンクンのほかの月
Regulars are consistent this month can turn sunny and hot for a stretch, then briefly cloudy and cool when a cold front passes through, before swinging back to sunny and hot again within a day or two. Our row backs that warm, still-showery read, 27.7C reading as a hot 30C, over 21.5C nights, with 30.1mm of rain across 7.4 days and humidity at 73 percent. Regulars are specific that tropical showers here tend to last only 5-10 minutes rather than settling in, and that packing a light sweater for cooler evenings is worth it even on an otherwise warm trip. The sea sits at a warm, swimmable 26.8C regardless of which version of the day arrives. The record: 9.8 hours of sun, a 20.4 kph wind and AQI 47.
Cancun-forum threads on September weather confirm it's sunny and hot with high humidity most days, a typical afternoon high around 32C that feels considerably warmer given the moisture in the air. September sits squarely in hurricane season and is one of the two busiest months for tropical activity, but posters are consistent that forecasts calling for rain and storms every day rarely match the actual experience - genuine all-day washouts are called rare, with rain more typically landing overnight or as a brief afternoon burst. Regulars recommend travel insurance covering storms as a sensible precaution, even though the odds of a direct hit on any specific week are described as slim. The clear upside: noticeably lower rates and thinner crowds than the winter high season. The record: 31.3C days feeling like a punishing 37C, 24.8C nights, 175mm across 23.3 days, 82 percent humidity, a 29.9C sea and 10.5 hours of sun.
April in Cancun is dry, hot and squarely inside the worst of the sargassum. Regulars put the peak at April through June, arriving daily and in quantity, varying by the day and by the stretch of beach; their mitigation is geography - it thins going north towards Costa Mujeres, the western shore of Isla Mujeres sees less, and many hotels rake their frontage each morning. Lent can also be very windy here, which our row's 20.9 kph reflects. The other April question is spring break: most American school breaks fall in the last two weeks of March, and the consensus is that Cancun is big enough to dilute them. The record: 29.5C days that feel like 33C, 23.7C nights, 5.7 precipitation days carrying 31.7mm and a 27.2C sea.
March on the Cancun forum comes down to three variables. Weather is the easy one: sunny, 85 to 89F, very little falling from the sky. Wind is the one people underrate - late March starts the surada, the run of strong southerlies that peaks across March, April and May, and a windy week changes the beach more than the forecast does. Sargassum season opens late February or early March, but March amounts are usually light to moderate and not every day; April to June is when it arrives in quantity. Spring break lands the weeks of about 23 and 30 March, and regulars say it spreads thin and stays in its own places. The record: 28.5C days feeling like 31C, 22.6C nights, 6 precipitation days, a 26.6C sea, a 21 kph wind.
通年のメモはカンクンの概要ページにあります。 地図のカンクンのカードから自分のメモを追加できます。
カンクンの気候平年値 — 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月のカンクンの混雑
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。
閑散編集部が選ぶ閑散月、Mexican summer holidays、主な訪問国のうち3か国で学校休暇
ピークの混雑混雑ショルダーシーズン閑散
カンクンの天気が良い月
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)。
天気はまずまずカンクンの天気は一年を通じて大きく変わりません — どの月も快適さはほぼ一定です。
8月のカンクンのイベント
毎年の季節のイベント、自然の見どころ、休業、祝日 — 厳選し出典を明記しています。
- ルール
Visitor tax and park fees
1月1日〜12月31日Quintana Roo charges every foreign visitor a state tourism fee, paid online before you fly out, and the marine parks off Isla Mujeres and Cozumel add their own per-day charge on the boat. 出典 ↗
- 季節
Sargassum season
4月1日〜9月30日 · 例年リスクRafts of brown seaweed pile up on the east-facing beaches, worst between May and August. It rots fast and smells, hotels rake it at dawn, and the north-facing beaches at Isla Mujeres usually escape it. 出典 ↗
- 自然
Sea turtle nesting
5月1日〜10月31日 · 例年Loggerheads and greens come up the hotel-zone beaches at night through the summer and the hatchlings run from August. Beach lighting is dimmed and the nests are fenced; the releases are run by the hotels. 出典 ↗
- 要注意
Hurricane season
6月1日〜11月30日The Atlantic season runs June to November, with most activity between mid-August and mid-October. 出典 ↗
- 自然
Whale sharks off Isla Mujeres
6月15日〜9月15日ダイビングシーズン早めの予約をHundreds of whale sharks gather to feed north of Isla Mujeres and the permitted swim season runs from mid-June to mid-September, July being the densest. It is a three-hour boat day in open water, often a rough one. 出典 ↗
- 祝日
Mexican summer holidays
7月15日〜8月31日 · 例年学校休暇混雑Domestic school holidays fill the hotel zone with Mexican families, which is a different and cheaper crowd than spring break but the same queue at Xcaret. 出典 ↗
近くで開催中のイベント
カンクンから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。
カンクンはどこにある?
8月のカンクン — よくある質問
- 8月はカンクンを訪れるのに良い時期ですか?
- カンクンの8月:猛暑、雨が多い、空気がきれい — 雨の日20日が気にならなければ悪くない時期。SeasonMapの快適スコアでは、カンクンの12か月中9位です(80/100)。
- 8月のカンクンはどんな天気ですか?
- 8月のカンクンは、平均最高気温31.8°C、最低気温25.2°C、降水量は約149.5 mmで、雨の日はおよそ20.4日です。
- 8月のカンクンの大気質はどうですか?
- 8月のカンクンの米国大気質指数(US AQI)は、平均約48です。
300 km圏内:Isla MujeresのWhale shark season(5月15日〜9月17日)、HolboxのWhale shark season(5月15日〜9月17日)。