Upon landing, Caesar left Quintus Atrius in charge of the beach-head and made an immediate night march 12 mi (19 km) inland, where he encountered the British forces at a river crossing, probably somewhere on the River Stour. The Britons attacked but were repulsed, and attempted to regroup at a fortified place in the forests, possibly the hillfort at Bigbury Wood, Kent, but were again defeated and scattered. As it was late in the day and Caesar was unsure of the territory, he called off the pursuit and made camp.

However, the next morning, as he prepared to advance further, Caesar received word from Atrius that, once again, his ships at anchor had been dashed against each other in a storm and suffered considerable damage. About forty, he says, were lost. The Romans were unused to Atlantic and Channel tides and storms, but nevertheless, considering the damage he had sustained the previous year, this was poor planning on Caesar's part. However, Caesar may have exaggerated the number of ships wrecked to magnify his own achievement in rescuing the situation. He returned to the coast, recalling the legions that had gone ahead, and immediately set about repairing his fleet. His men worked day and night for approximately ten days, beaching and repairing the ships, and building a fortified camp around them. Word was sent to Labienus to send more ships.

Caesar was on the coast on 1 September, from where he wrote a letter to Cicero. News must have reached Caesar at this point of the death of his daughter Julia, as Cicero refrained from replying "on account of his mourning".