Cyclostationary empirical orthogonal functions, derived from satellite altimetry, are combined with historical sea level measurements from tide gauges to estimate nearly-global monthly sea level fields from 1900-2010. The reconstructed global mean sea level is shown to compare favorably with the satellite altimetry over the period from 1993-2010. The trend in global mean sea level for the fully reconstructed data record is 1.4 mm/yr. This reconstruction shows improvement over previously published reconstructions in its robust ability to capture sea level variability associated with the modulated annual cycle and El Nino-Southern Oscillation signals.