Rapid, millennial-scale changes in sea level have been proposed for the beginning, middle, and/or end of this the last interglacial period, where each of these scenarios has different implications for the way that polar ice sheets will behave in a warming world. We have generated a suite of U-Th ages for fossil corals in the Seychelles with a detailed sedimentary and stratigraphic context to determine the timing of peak sea level and of several abrupt interruptions to vertical reef accretion. Using multiple, independently-derived chronologies, we establish a temporal link between episodes of reef growth and meltwater influx into the N. Atlantic. These observations suggest a bipolar interplay of ice sheet growth and decay between the Northern and Southern hemispheres that contribute to millennial scale oscillations in sea level and climate during this past warm period.