Under the weather
/ˈʌndə ðə ˈweðə/informal, politeUK · US
What does “Under the weather” mean?
Under the weather means slightly ill or not feeling well.
"Under the weather" is deliberately vague. It signals a cold, a headache or general tiredness rather than serious illness.
It is polite and widely used at work, which is part of its appeal: it excuses you without oversharing.
When do people say it?
A gentle way of saying you are unwell without giving details.
“I'm a bit under the weather, so I'll join the meeting by phone.”
Is it formal or informal?
Register: informal, polite. It is most at home in everyday conversation rather than formal writing. Most common in UK and US.
Where does it come from?
Nautical in flavour and nineteenth century in date; the exact source is unsettled.
Origin confidence: Disputed; treat with caution
How do you say “Under the weather” in other languages?
Related idioms
- Call it a day, To stop for the day, or stop altogether.
Last updated 2026-09-11