Under the weather: Meaning and Examples

Updated 2026-10-03 · Idiom Meanings editorial team

Quick answer: When you are under the weather, you are feeling slightly ill, tired, or unwell. This common idiom describes a state where you do not have your usual energy or health. It is not a serious medical emergency, but a general sense of being rundown.

What Does "under the weather" Mean?

The phrase under the weather means that you are feeling physically unwell or slightly sick. It indicates a temporary condition where your body is not operating at its normal level of health or comfort.

This expression captures the feeling of mild discomfort, such as having a cold, a headache, or general fatigue. It describes a situation where you might prefer to rest rather than engage in strenuous activity or social events.

How People Use It Today

Today, people use this phrase to politely explain why they are taking a sick day, canceling plans, or staying home from work. It is a gentle way to communicate that you are not at your best without providing specific medical details. It remains a standard part of everyday conversation.

Example Sentences

I am feeling a bit under the weather, so I will skip the gym today.
Sarah stayed home from work because she was under the weather.
If you are under the weather, it is best to drink plenty of fluids.
He looked pale and under the weather after staying up all night.
I would love to join the party, but I am under the weather.
She took a nap because she was feeling under the weather.
My boss allowed me to work from home since I was under the weather.
Are you under the weather, or just tired from travel?
I cooked soup for my friend who was under the weather.
Please let me know if you are under the weather tomorrow.

Idioms With a Similar Meaning

Not feeling great: This is a more casual and vague way to say you are unwell, lacking the specific idiomatic flavor of under the weather.
Under the weather: Wait, this is the topic itself. Let us use not oneself. This phrase implies you are not acting like your normal, healthy self.
Feeling lousy: This emphasizes a strong feeling of physical discomfort or misery, often more intense than just being under the weather.
In a bad way: This can mean physically sick, but it also frequently refers to emotional distress or serious trouble, not just mild illness.
Not up to par: This suggests your performance or health is below your usual standard, which can apply to skills as well as sickness.
A bit off: This is very subtle, implying a slight deviation from normal health without explicitly stating you are sick.

Opposite or Contrasting Phrases

On top of the world: This means you are feeling extremely happy and energetic, the complete opposite of feeling unwell or low.
Fit as a fiddle: This idiom describes being in excellent physical health and strong, contrasting with the weakness of being under the weather.
Full of beans: This phrase indicates you have high energy and enthusiasm, whereas under the weather implies low energy and discomfort.
Healthy as a horse: This suggests robust physical strength and vitality, directly opposing the frailty associated with being under the weather.

When to Use It and When Not To

You can use this phrase in casual conversations with friends, family, and coworkers. It is perfect for explaining why you need to rest or decline an invitation. It strikes a balance between being honest about your health and keeping the details private and brief.

Avoid using this idiom in formal medical reports or legal documents, as it is too vague. It is also inappropriate to use it if you have a serious injury or chronic condition, as it minimizes the severity. Stick to clear, specific language for serious health matters.

Example Dialogues

Do you want to grab lunch at the new Italian place?

I would love to, but I am feeling a bit under the weather this afternoon.

Why did you leave the meeting early?

My headache got worse, and I realized I was getting under the weather.

Are we still on for the hike tomorrow morning?

I think I will pass; I woke up feeling quite under the weather.

You look tired and pale today.

Thanks for noticing, but yes, I am definitely under the weather.

Can you cover my shift on Friday?

Sure, if you are under the weather, I can take over easily.

More Example Sentences

The sudden drop in temperature left the entire office feeling under the weather.
Even though he was not sick, he felt under the weather after the long flight.
She decided to cancel her plans because she was feeling under the weather.
It is common to feel under the weather during seasonal changes.
He stayed in bed all day, feeling under the weather and unable to focus.
Her voice was weak because she had been under the weather for two days.
We postponed the event since many attendees were under the weather.
Feeling under the weather, she ordered takeout instead of cooking dinner.

In Formal Writing, Say This Instead

Not feeling well: I am writing to inform you that I am not feeling well and cannot attend.
Unwell: The employee requested a leave of absence as he was feeling unwell.
Suffering from illness: Production slowed down because several workers were suffering from illness.
Experiencing health issues: She is currently experiencing health issues and will return next week.
In poor health: Due to being in poor health, he declined the invitation to speak.

Frequently Asked Questions

Is under the weather serious?

No, it typically describes mild illness like a cold or fatigue. It is not used for severe injuries, emergencies, or critical medical conditions that require immediate attention.

Can I use it for mental health?

While it primarily refers to physical sickness, people sometimes use it to describe feeling emotionally low. However, it is best reserved for physical symptoms to avoid confusion.

Is it rude to say I am under the weather?

Not at all. It is a polite and common way to communicate that you are unwell. It helps others understand why you might need to cancel plans or take a break.

Can children use this phrase?

Yes, children can use it to tell parents or teachers they feel sick. It is a family-friendly expression that helps them communicate their physical state simply and clearly.