Ferries from Guernsey to Portsmouth can peak at up to 1 daily sailings, Sailing frequency typically peaks in the summer months, with approximately 7 departures offered each week. While schedules may be reduced from Guernsey to Portsmouth in other seasons, ferry services are often still available.

Ferry travel from Guernsey to Portsmouth on average typically takes 9h 15m. The earliest ferry usually leaves from Guernsey at 08:30, arriving to Portsmouth at 08:00 The latest ferry departs at 23:59 and arrives at 18:20.