Sally and Sarah have 2,300 miles to go in the rowing regatta

Sally Kettle, 26, from Brighton, and her mother Sarah, 45, from Northampton, are a month into the trip and are now preparing for bad weather.

The team, who have rowed 700 miles, said they expected the storm to hit on Friday and would have to "sit it out".

Once the storm passes the women have to row a further 2,300 miles.

The problem we have is our calf muscles are wasting away because we are not using them so if we get to the other end we will have a serious case of jelly legs Sally Kettle

Speaking on a satellite phone from the Atlantic, Sally Kettle told BBC News Online: "The last month has been brilliant but in the last few days a north westerly has been pushing us the wrong way.

"Now we are expecting the storm so we will have to batten down the hatches, put out the power anchor and ride it out."

Sally, who unsuccessfully attempted the Ocean Rowing Society's Atlantic Regatta in the past with her partner Marcus Thompson, has said the cramped conditions have not caused any arguments.

She said: "We have not fallen out and the time has flown by. It is brilliant.

"The only problem we have is our calf muscles are wasting away because we are not using them so if we get to the other end we will have a serious case of jelly legs."

If they complete the race the Kettles will be the first mother and daughter team to finish the challenge.