The Met Office said the strong winds were likely to cause “dangerous coastal conditions”.
Officials warned of a small chance of injuries from flying debris and from large waves and beach material being thrown onto sea fronts, coastal roads and properties.
More than 200 flood alerts are in place across the UK, while about 350,000 homes had lost power, though most have been reconnected.
Energy Secretary Ed Miliband said: “My thoughts are with all those affected by Storm Bert.
“For those who have lost power, my department will be keeping in close touch with the energy companies as they seek to ensure it is restored as swiftly as possible and help those affected.”