9.3.3 Accelerations in sea level rise
Is there evidence of any “accelerations” (or departures from long-term linear trends) in the rate of sea level rise? From examinations of both composite regional and global curves and individual tide gauge records, there is no convincing evidence of an acceleration in global sea level rise during the twentieth century. For longer periods, however, there is weak evidence for an acceleration of the last 2-3 centuries.
Source: Climate Change: The IPCC Scientific Assessment