A racing yacht ferrying Swedish teen climate activist Greta Thunberg is rapidly approaching New York, the destination of her transatlantic voyage.
The arrival of the Malizia could however be somewhat delayed compared to an earlier estimate due to weakening winds, sources close to the team told dpa on Monday.
In an earlier tweet, the 16-year-old said she expects to arrive in New York on Tuesday, writing: "Strong winds are pushing us west. We expect to arrive at North Cove Marina in Manhattan, New York sometime Tuesday afternoon or evening."
However, the arrival could instead take place on Wednesday evening or Thursday morning (local time), dpa learned.
 Thunberg refuses to fly, citing the CO2 emissions caused by aviation. Her now-famous weekly school strike outside the Swedish parliament began on August 20, 2018. It inspired other young people across Europe and beyond to demand action on climate change under the "Fridays For Future" slogan.
 The 18-metre long Malizia is captained by German sailor Boris Herrmann and Pierre Casiraghi of Monaco. Thunberg's father Svante Thunberg and filmmaker Nathan Grossman are also on board.
In addition to weaker winds, the yacht has to sail up the Hudson River to the marina. The last leg of the voyage to the marina is expected to take about two hours. The crew has to time the last leg with high tide, factoring in the yacht's 5-metre draught.
Finally, the crew and passengers have to be cleared by US Customs and Border Patrol, which closes at 10 pm. The Malizia racing yacht set sail on August 14 from Plymouth, England.
In the United States, Thunberg plans to attend the UN Climate Action Summit in New York on September 23 on the sidelines of the UN General Assembly. She also plans to attend climate protests set for September 20 and 27. Thunberg will also visit Canada and Mexico before joining the annual UN climate change conference hosted by Chile in December.