Outdoor clothing retailer Blacks is one of few UK retailers to celebrate the inclement summer - as its sales of waterproofs soared.
There was huge demand for wellies in the week before Glastonbury
The company, which owns Millets, said that sales of camping equipment had also been at "encouraging levels".
Demand was driven by correct forecasts of wet and muddy conditions at music festivals such as Glastonbury.
"Every black cloud - in Blacks' case anyway - has a silver lining," said Richard Ratner of Seymour Pierce.
The company said that the sales increase of 6.3% in the 19 weeks to 14 July, reflected its introduction of new products - as well as the weather.
Last month Blacks said that its chief executive Russell Hardy was stepping down by mutual consent, after a string of profit warnings.
Back in March, the firm said it was shutting 45 stores, and warned that profits would be below expectations - having blamed falling sales last year on warmer weather.