Cliveden Rocks has been cancelled due to the weather.
Thousands of people were due to attend the concerts, which were set to take place tonight and tomorrow at the National Trust venue in Taplow.
But this morning organisers made the decision to call them off.
A spokeswoman said: "This is a difficult decision to make, but with 12 hours of solid rain overnight and thunder storms due this afternoon, we feel that the site is no longer a safe place."
There are no plans to reschedule the event.
Cliveden has offered the following advice for anyone who was due to attend:
- Tickets brought via the Box Office will automatically be refunded within five working days
- If you have booked through the property, please come back and your ticket price will be refunded. Please bring your ticket with you for proof of purchase.- If you have booked through the Frost Partnership, please contact the property directly to arrange a refund. Email firstname.lastname@example.org
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