Light winds mean the Volvo Ocean Race leaders are revising their finish time into Miami.
Camper is engaged in a tight three-way battle for the lead with Puma and Telefonica as the fleet heads downwind towards the Doldrums in leg six.
The latest weather reports suggest slow going across the Caribbean with the trade winds remaining light and variable all the way to the finish. That means the estimated time of arrival has slipped by four days to May 10.
Camper navigator Will Oxley said the uncertain weather models may result in some unconventional tactics.
"The Bahamas lie 3000 miles ahead. It looks like mostly downwind sailing all of the way, which is quite a change for the race. First, though, we have the Doldrums to deal with.
"The trades are looking quite disrupted for the last part of the leg and some `interesting' routing options are popping up.
"Normally you reject these out of hand, but based on our experience so far in this Volvo Ocean Race - every option remains on the table.
"We're set up quite nicely though where we are at the moment and we're hoping that there's a bit better breeze and current than what the other guys have got.
"We got around Brazil in pretty good shape really but that's not necessarily going to mean much in the long term. The only thing we can really be sure about is that this leg is going to be tight for a very long time.''