How to Say "Very Hot" in Japanese

とても暑い

totemo atsui

In Japanese, "very hot" is expressed as とても暑い (totemo atsui).

The phrase is used to describe a high air temperature or weather that feels very warm.

Which one should you use?

Use 暑い (atsui) for weather or air temperature, but use 熱い (atsui) for objects like hot coffee or hot soup.

To make the phrase polite, add です to the end of the adjective, resulting in とても暑いです.

totemo atsui

While 暑い describes the weather, the word 熱い describes an object's temperature and can also be used to describe a person's passionate or 'hot' personality.
To cope with the 'very hot' summer, Japanese culture practices 夏バテ, a state of lethargy or loss of appetite caused by heat exhaustion.
To express an extreme, sweltering heat that feels heavy or humid, Japanese speakers often move beyond とても暑い to use the word 蒸し暑い (mushiatsui), which literally means 'steam-hot'.

夜はとても暑い。
It is very hot at night.
This sentence shows how to describe the temperature at night using とても暑い.
Tatoeba #79775 by bunbuku, translation #323942 by CC
今日はとても暑い。
It is very hot today.
This sentence shows how to describe today's temperature using とても暑い.
Tatoeba #5092 by bunbuku, translation #1689 by blay_paul
とても暑いですね。
It's very hot, isn't it?
This sentence demonstrates a common way to remark on the heat using とても暑い.
Tatoeba #200674 by bunbuku, translation #37876 by CK
11 more sentences on Tatoeba

Ren and Himari are walking outside in the summer.

蓮 Ren

外はとても暑いですね。
Soto wa totemo atsui desu ne.
It's very hot outside, isn't it?
陽葵 Himari

はい、本当に暑いです。
Hai, hontō ni atsui desu.
Yes, it really is hot.
蓮 Ren

どこかで休憩しましょう。
Dokoka de kyūkei shimashō.
Let's take a break somewhere.
陽葵 Himari

いいですね。あそこに入りましょう。
Ii desu ne. Asoko ni hairimashō.
That sounds good. Let's go in there.

Sources

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