The UK Foreign Office said high levels of traffic are expected on all routes across the channel from 7 April.
It comes after a critical emergency was declared at the Port of Dover last weekend (31 March), when passengers faced 17-hour queues due to slow processing and an unexpected number of coaches.
"There is a possibility of delays over the Easter bank holiday weekend as high levels of cross-channel traffic on all routes are expected," the FCDO advised.
