Microbes could munch oil away from Gulf sands but dispersants may have made the problem worse.
Churned up waves and strong winds forced the suspension of oil skimming and booming operations.
Strong swells and winds could still reach the slick area and disrupt cleanup efforts.
The leak will not be completely stopped until BP completes the drilling of two relief wells, sometime in August.
Remote-controlled submarines installed the cap in BP's most recent attempt to contain the oil leak.
Since the cut was irregular, fitting the cap snugly over the leak could prove all the more challenging.
BP has tried and failed repeatedly to halt the flow of the oil, and the latest attempt like others has never been tried before a mile beneath the ocean.
BP called off its most recent attempt to stop the oil leaking into the Gulf, though it had said "Top Kill" was its best option.
From analyzing oyster shells to monitoring how the oil is dispersing, scientists are working furiously to collect as much data as possible on the Gulf spill.
Officials hope the construction of these islands will separate the Louisiana coastline from the widening slick.