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This study examines the effect of Jakarta Bay reclamation on sea level height generated by storm tide using Regional Ocean Modeling System (ROMS) with tidal data sources from The Oregon State University TOPEX / Poseidon Global Inverse Solution Tidal Model Version 7.2 (TPXO 7.2), wind and atmospheric data from Interim European Center for Medium-Range Weather (ECMWF) Re-analysis (ERA-Interim) with a resolution of 1/8˚. The Simulation is carried out in two stages with the scenario before and after reclamation. Harmonic analysis using data from the model results is used to obtain astronomical tides. the effect of reclamation on water level is seen from the difference in water level from the astronomical tide before and after reclamation. the result shows that the reclamation of the Jakarta Bay is changing the tidal range in the Jakarta Bay to a greater extent. Tidal range changes can reach 0.19 m or 22.4% in Bekasi, while changes in areas that turn into reservoirs after reclamation reach 0.07 m or 7.2% (Western Garuda Reservoir) and changes at flood points can reach 0.09 m or 7.2% (Sunda Kelapa).