Experimental　and　numerical　studies　were　conducted　to　assess　the　stability　of　the　breakwater　of　Fujairah　Port　on　the　east　coast　of　the　United　Arab　Emirates　against　tsunamis.　Experiments　were　conducted　on　a　1:50　scale　and　numerical　analysis　was　done　with　the　formulas　of　tsunami-breakwater　interaction.　The　experimental　observations　corroborated　the　numerical　results.　The　breakwater　was　safe　up　to　3m　of　tsunami　height,　but　when　the　tsunami　height　increased　from　3m　to　6m,　the　percentage　damage　to　the　leeside　(portside)　of　the　breakwater　increased　compared　to　the　seaside.　The　leeside　of　the　breakwater　was　deformed　by　tsunami　overtopping　and　seepage　—　the　breakwater　cross-section　reshaped　from　trapezoidal　to　quasi-triangular　at　6m　tsunami　impact,　however,　the　breakwater　was　not　breached.　Rubbles　of　the　breakwater　were　transported　due　to　sliding,　rolling,　and　saltation　by　overtopping　and　seepage.　For　6m　tsunami　height,　rubbles　from　the　seaside　rolled　over　up　with　saltation　and　transported　to　the　leeside.　A　large　number　of　rubbles　were　transported　landward　from　the　leeside　of　the　breakwater　but　a　few　were　displaced　offshore　from　the　seaside.