Predict Weather With a Cup of Coffee

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Introduction: Predict Weather With a Cup of Coffee

I learned this trick reading Backpacker Magazine years ago while waiting for an air taxi flight into the Nahanni River. It really works.

Make a cup of coffee. I like to add cream and sugar since it makes the bubbles easier to see but black coffee is fine. Hot tea or hot cocoa will work too.

Step 1: Watch the Bubbles

When you pour the coffee into your cup, watch the bubbles.

If the bubbles move to the edge of the cup rather quickly, that's a good sign. Expect clear skies for the next 12 hours.

If the bubbles hang around in the center of the cup, get out your rain gear. You can expect rain in 12 hours.

If the bubbles slowly move to the edge of the cup, you may get a bit of weather, but it should be clearing in a few hours.

If you've managed to make a cup without bubbles, flop a spoonful of coffee back into your cup and make some more bubbles.

Step 2: Theory

The theory behind this trick is that high pressure will push the bubbles to the edge, and high pressure indicates a period of sunny, calm weather. Low pressure won't move the bubbles and low pressure systems typically bring unsettled weather.

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60 Comments

Amazing I gonna try it !

My mom told me about this about a month ago. The few times I done it, it was right. Crazy how such a little everyday things works :)

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I don't think I want to know what gets predicted when a frog jumps in your coffee. Best just run for the hills. :-)

Adams had been to The End of Time Restaurant, so he naturally knew all.

P.S. The coffee trick works best if you can get exactly 42 bubbles ...

I wonder what the improbability factor of getting exactly 42 bubbles would be?

Infinity, of course, give or take 42,000,000,000,000,000,000,000.

Which, of course is 42 x 10^(42/2). The chances of this occurring randomly is, well, pretty Improbable - as a rough Guide.

How exactly does this work? I drink tea every day and I never noticed this cool trick. I should try it.