Health3 min(s) read
Published 10:23 02 Jul 2026 GMT
While many will be familiar with the phrase “summer body”, fewer will be as well-acquainted with the phenomenon of the “summer penis”.
Attaining that perfect physique for the warmer months sees many forgo calorific indulgences in favor of protein-dense meals and intensive sessions at the gym, so it may come as a surprise that the summer penis isn’t acquired in quite the same manner.
“Summer penis” is a nickname given to a guy’s manhood when there is swelling in that sensitive region during high temperatures, and not a penis suddenly developing a six-pack.
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According to experts, there is a biological explanation for this increase in size, with the blood vessels in the penis dilating to help the body cool.
As a result, men are reportedly enjoying possessing larger members.
“So ‘summer penis’ is a term people use to describe when a male’s penis seems a bit bigger or fuller during hot weather,” Dr Chun Tang, a private healthcare GP has revealed.
“It’s not an official medical thing, just something people have noticed and talked about.
“The idea is that in warmer months, especially when it’s hot and humid, the heat causes your blood vessels to expand a bit, which can make things down there look a bit different.
“Some men notice that their penis looks a little larger, especially when it’s flaccid.
“Because of the increased blood flow, it might feel a bit softer or more relaxed than usual.”
Dr Tang added that men whose bodies are more susceptible to changes in the weather are more likely to experience the effects, despite there being no exact temperature at which ‘summer penis’ would typically occur.
According to other healthcare professionals, both men and their sexual partners may get an additional boost from summer heatwaves, with the ‘summer penis’ impacting sex.
Dr Sarah Jarvis told The Sun: “Technically when you’re hot, as well as when you are excited, then your blood vessels may expand.
“When blood vessels on the surface are a bit bigger, then things are going to look a bit bigger.
“But your penis is not growing, it’s just your blood vessels growing slightly larger as a way to reduce heat.
“It’s not going to make you perform better either – when you are erect your penis is swollen to the max anyway.”
Unfortunately for some, this isn’t a permanent state of affairs, with penises expected to go back to normal size once the weather becomes cooler. Sorry, gents.
For those who don’t require that extra girth, Dr Tang advises keeping cool, particularly if the ‘summer penis’ makes you feel uncomfortable.
“Avoid too much heat, wear loose clothes, and stay well-hydrated. This can help minimise the effect,” he adds.
“On its own, ‘summer penis’ isn’t a sign of anything serious.
“But, if you notice any sudden or unusual changes in your penis – like significant swelling, pain, or discomfort – then it’s definitely a good idea to get it checked out by a doctor.
“Those could be signs of something that does need attention, like an infection or an injury.”
