A 13-year-old American boy arrived at Mount Everest's Camp Two, a step closer to completing his goal of conquering the highest peaks on all seven continents.

After a nine-hour climb from Camp One, Jordan Romero and his support team arrived at Camp Two, which is at 7,500 metres, while Everest's summit is at 8,850 metres, according to Romero's blog.

Climbers stay overnight at three or four camps before the summit, depending on their route and pace.

"Team Jordan is OK. We are trekking!" read the latest update from Romero's blog this morning.

The record for the youngest climber to scale Everest is held by Temba Tsheri of Nepal, who reached the peak at age 16.

Romero, from Big Bear, California, is climbing with his father Paul and three Sherpa guides.

He climbed the highest peaks on six other continents and hopes to reach the top of the world's tallest mountain in five to seven days, depending on weather conditions. Everest, however, will be his first challenge above 8,000 metres.

"Every step I take is finally toward the biggest goal of my life, to stand on top of the world," said Romero on his blog.

The teenager, who climbed Mount Kilimanjaro in Africa when he was 10 years old, said he was inspired by a painting in his school hallway of the seven continents' highest summits.

Weather forecasts for Everest posted on the blog showed sunny skies and winds of up to 83 miles per hour, with winds expected to ease to 37mph tomorrow.