Under the weather: meaning, examples and when to use it
Short answer: “Under the weather” means feeling a little sick. It is a polite, soft way to say that you do not feel well: “I'm feeling under the weather today.”
What does “Under the weather” mean in English?
If you are “under the weather”, you are not very ill, but you do not feel good. You may be tired, have a small cold or a headache. The idiom has nothing to do with the real weather, so you can use it on a sunny day.
Examples of “Under the weather”
- She stayed home because she was feeling a bit under the weather.
A small illness is a reason to rest. - I'm under the weather, so I will skip the party.
A polite way to explain why you cannot come. - He looked under the weather this morning.
You can say it about someone else when they look unwell.
When do you use “Under the weather”?
- To say that you feel a little sick without giving details.
- To explain why you stay home or cancel plans.
- In speech, messages and friendly emails.
Is “Under the weather” formal?
“Under the weather” is common and polite. It is fine in speech and in emails to colleagues. In a formal medical text, write “unwell” or “ill”.
Common mistakes with “Under the weather”
- It is only for small problems. For a serious illness, say “very sick” or “ill”.
- It does not describe bad weather. Say “It is raining” for weather.
- Say “under the weather”, not “below the weather”.
Similar expressions
- It is in the group idioms about life, time and weather, with “raining cats and dogs”.
Questions
What does “Under the weather” mean in English?
“Under the weather” means feeling a little sick. It is a polite, soft way to say that you do not feel well: “I'm feeling under the weather today.”
Is “Under the weather” formal?
“Under the weather” is common and polite. It is fine in speech and in emails to colleagues. In a formal medical text, write “unwell” or “ill”.
Is “under the weather” serious?
No. It means a little sick, for example tired or with a small cold.
Can I say “I am under the weather” in an email to my boss?
Yes. It is a polite and common way to say that you do not feel well.
Part of the English idioms guide and of idioms about everyday life, time and weather, in the 💬 Idioms tool. Đọc bằng tiếng Việt.
Written for English learners by the English for Fun team. How we write our lessons · Last updated 2026-11-05.