Guide

Listen forWeather

Why frozen ponds ping, chirp and growl

December to February

A frozen pond or lake can ping, chirp, whoop like a toy laser, or growl as its ice expands, shrinks and cracks with temperature change. Listen from the shore, never from the ice.

Why this time of year

Where a pond or lake has frozen over, swings between cold nights and sun-warmed days keep stressing the ice.

How to notice it

  1. Stand on the bank, well back from the edge, and go quiet for a full minute before you decide it is silent.
  2. Try a cold evening after a mild day, or a sunny cold morning after a freezing night, when the ice is changing temperature fastest.
  3. Listen for short pings and 'poing' twangs, a falling 'pew' like a toy laser, and now and then a low growl.
  4. Choose a pond with bare ice if you can: deep snow on top deadens the sound, and very thick ice is quieter too.

Try this with kids: From the bank, stay quiet and count how many different sounds you can hear from the ice: a ping, a whoop, a growl. Which one was your favorite?

Good to know: The falling 'pew' is dispersion: high tones travel through ice faster than low tones, so the high note arrives first.

Safety

  • Stay off the ice. MassWildlife says there are no guarantees and to always consider ice potentially dangerous, and you can't judge ice by how it looks or how thick it is.
  • Listen from the bank and keep children and dogs back from the water's edge.

Sources

  • seagrant.umn.eduUniversity of Minnesota Sea Grant (John A. Downing, 2021-12-28), read in full. Ice warms and cools with sun and air; expansion cracks it and the vibration is heard as sound; sounds less pronounced in the dead of winter because ice is thicker, heavier and snow-covered; spring brings new sounds. Quotes: 'That expansion causes the ice to crack and deform and this causes vibration of the ice that you hear as sounds.' / 'Some people have puzzled at why the sounds are not as pronounced in the dead of winter.' / 'Third, the ice is usually snow-covered and this acts to deaden sounds.' / heading 'A very noisy start to winter.' Minnesota, not New England.
  • lakeice.squarespace.comLake Ice reference site (lakeice.org, expert-author site for ice skaters, Vermont-based). Cooling shrinks ice and it cracks with a distinctive pitch; noisier as temperature drops late in the day; thin black ice most prone. Quotes: 'When the temperature drops late in the day the amount of noise new ice makes picks up.' / 'Contraction cracks make particular poing when they form.' / 'Contraction cracks are more common in black ice less than a few inches thick.'
  • discovermagazine.comDiscover Magazine (secondary; summarized by the fetch tool, not read verbatim). Retained only for the chirp mechanism: high frequencies travel faster through ice so the high tone arrives first, giving a falling 'pew pew'; cracking often follows significant temperature changes. Also says 'spring and fall are the best times to hear it'.
  • mass.govMassWildlife ice strength and safety page, opened by the lead in the browser pane 2026-10-30. Quotes: 'There are no guarantees. Always consider ice to be potentially dangerous. You can't judge ice conditions by appearance or thickness alone'; '2 inches or less: STAY OFF!'; 'Remember to always keep pets leashed while walking on or near ice.' Backs the safety notes.

Checked against these sources on October 30, 2026.

In the guide for December, January, February

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