Sea Level

LATEST MEASUREMENT:
LATEST ANNUAL AVERAGE:
July 2017
84.8 mm

Sea level rise is caused primarily by two factors related to global warming: the added water from melting ice sheets and glaciers and the expansion of sea water as it warms. The first graph tracks the change in sea level since 1993 as observed by satellites.

The second graph, derived from coastal tide gauge data, shows how much sea level changed from about 1870 to 2000.

Data shown are latest available, with time allowed for processing.

Learn more

NASA Sea Level Change

SATELLITE DATA: 1993-PRESENT

Data source: Satellite sea level observations.
Credit: NASA Goddard Space Flight Center
Rate of Change
3.4
millimeters per year
margin: ±0.4
Click+drag to zoom
Reset
FTP  |  PNG

GROUND DATA: 1870-2000

Data source: Coastal tide gauge records. 
Credit: CSIRO
data graph