Read here. UK ocean experts, using the best tidal gauges available, discover that sea level rise is not accelerating. In fact, it has been decelerating since 1960, as the below graph indicates. (click on image to enlarge)
"Furthermore, the rate of sea level rise as determined by satellite altimetry (which is only available since 1992 and is calibrated to tide gauges) has also decelerated over the past 5 years from 3.2 mm/yr to only 1.5 mm/yr, about the same rate as calculated by Holgate for the period 1954-2003. Paleologic data also indicate sea level rise has greatly decelerated over the past 6000 years, and that sea levels have been rising naturally since the last ice age."