Thunder sounds for sleep: soothing, or a bad idea?

Rain and thunder is one of the most-played sleep tracks there is. The rain half has the same thin evidence as any steady noise. The thunder half has a problem of its own: thunder is the opposite of steady, and sleep reacts to peaks, not averages.

Last updated October 2026 · about 6 minutes

No one has run a trial of thunder sounds for sleep, so there is nothing to cite that says they work or don't. What can be done is take what is known about sound and sleep in general and see what it implies for a track made of long rumbles and sudden cracks.

The claim you'll see, and what it is based on

Pages on this topic often cite a 2017 study in Scientific Reports by Gould van Praag and colleagues as showing that natural sounds relax the body. It is a real study, and it is worth reading what it did. Participants lay in an fMRI scanner and listened to sounds from natural and artificial environments, while the team measured brain connectivity, heart-rate measures and mind-wandering. The result was a shift in how brain regions were coupled and changes in autonomic arousal under the natural sounds. The study did not measure sleep, was not about storms specifically, and did not find the increase in default-mode-network activity that its authors had set out to test [1].

So "nature sounds do something measurable to the body while you're awake" has a reasonable basis. "Thunder helps you fall asleep" does not have one yet.

Why peaks matter more than averages

The strongest sleep evidence about sound is about noise events: short, loud changes against a quiet background. In a 2018 systematic review for the WHO, Basner and McGuire pooled polysomnography studies and found that the probability of awakening rises with the maximum level of each event: the odds ratio for awakening per 10 dBA increase in indoor L_max was about 1.35 for aircraft, road and rail noise alike [2].

That research is on transport noise, not storm recordings, so the numbers do not transfer directly. The principle does. Sleep is disturbed by sudden change in level, more than by overall loudness, and a thunderclap is a sudden change in level by design.

Where it can backfire

• Loud cracks on a quiet room. A track with sharp, close thunder is a series of small noise events you are choosing to play. A distant rolling rumble with no sharp peaks behaves much more like steady noise.
• Turning it up to cover the street. To mask traffic you raise the volume, and the thunder peaks rise with it. The steady part of a rain track masks; the thunder part, when loud, does the reverse.
• The cost of masking itself. A 2026 polysomnography study from the University of Pennsylvania found that 50 dB pink noise reduced REM sleep by roughly 19 minutes a night, and earplugs did better than noise at blunting intermittent environmental sounds [3]. That was pink noise, not thunder. It shows that adding a constant sound is not free.
• Evidence in general. A systematic review of 38 studies of continuous noise as a sleep aid graded the evidence that it improves sleep as very low [4]. Thunder tracks inherit that, they don't escape it.

If you like it, how to use it

• Prefer distant, rolling thunder over close cracks.
• Keep the volume low enough that the loudest peak is still not startling. If you can hear individual thunderclaps as events, it's too loud.
• Use a sleep timer or a track that fades rather than one that loops loudly until morning.
• If you share a room with a pet, watch the pet. Some animals are frightened by thunder recordings.

How to find out for yourself

This is a question about your own sleep, and averages from other people's rooms can't answer it. SomniTune has both Rain & Thunder and Distant Thunder (Pro sounds), so you can compare a sharp storm against a distant one, plain rain and silence. It logs which sound you fell asleep to and compares it against the night that followed, from Apple Health data (Apple Watch, Oura, Whoop, Withings) or from iPhone motion and on-device sound analysis if you don't wear a tracker. A few weeks gives you your own answer, measured as how long it took you to fall asleep.

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