diff --git a/.gitmodules b/.gitmodules
index a3775fc12d..4eab6a3600 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,8 +4,8 @@
   branch = develop
 [submodule "WW3"]
   path = WW3
-  url = https://github.com/NOAA-EMC/WW3
-  branch = dev/ufs-weather-model
+  url = https://github.com/NickSzapiro-NOAA/WW3
+  branch = wavice_sync
 [submodule "stochastic_physics"]
   path = stochastic_physics
   url = https://github.com/NOAA-PSL/stochastic_physics
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4f4d418862..395a4506f2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -73,6 +73,7 @@ set(JEDI_DRIVER     OFF CACHE BOOL "Enable JEDI as top level driver")
 set(CMEPS_AOFLUX    OFF CACHE BOOL "Enable atmosphere-ocean flux calculation in mediator")
 set(PDLIB           OFF CACHE BOOL "Enable Domain Decomposition in WW3 via PDLIB")
 set(CDEPS_INLINE    OFF CACHE BOOL "Enable CDEPS inline capability")
+set(WAVICE          OFF CACHE BOOL "Enable wave-sea ice coupling")
 set(HYDRO           OFF CACHE BOOL "Enable hydrostatic set")
 
 set(CMAKE_Platform $ENV{CMAKE_Platform})
@@ -214,7 +215,11 @@ if(WW3)
     list(APPEND _ufs_defs_private FRONT_WW3=WMESMFMD)
   else()
     if(PDLIB)
-      set(SWITCH "meshcap_pdlib" CACHE STRING "NUOPC mesh cap")
+      if(WAVICE)
+        set(SWITCH "meshcap_pdlib_IC4" CACHE STRING "NUOPC mesh cap")
+      else()
+        set(SWITCH "meshcap_pdlib" CACHE STRING "NUOPC mesh cap")
+      endif()
     else()
       set(SWITCH "meshcap" CACHE STRING "NUOPC mesh cap")
     endif()
diff --git a/WW3 b/WW3
index d9b3172f41..8580b34020 160000
--- a/WW3
+++ b/WW3
@@ -1 +1 @@
-Subproject commit d9b3172f4197c65d471662c6952a668152d71230
+Subproject commit 8580b340202ffa0a0806a577e7a6cb30ee71bab3
diff --git a/tests/default_vars.sh b/tests/default_vars.sh
index 236a9202ee..5f3a338f22 100644
--- a/tests/default_vars.sh
+++ b/tests/default_vars.sh
@@ -840,6 +840,7 @@ export WW3_CUR='F'
 export WW3_ICE='F'
 export WW3_IC1='F'
 export WW3_IC5='F'
+export wav_coupling_to_cice=false
 # ATMW
 export WW3_MULTIGRID=true
 export WW3_MODDEF=mod_def.glo_1deg
@@ -945,6 +946,11 @@ export_cice6() {
   export CICE_FRAZIL_FWSALT=.true.
   export CICE_KTHERM=2
   export CICE_TFREEZE_OPTION=mushy
+  #Wave-ice coupling variables
+  export CICE_nfsd=1
+  export CICE_tr_fsd=.false.
+  export CICE_restart_fsd=.false.
+  export CICE_wave_spec_type=none
   # SlenderX2
   export CICE_NPROC=${ICE_tasks}
   np2=$((CICE_NPROC/2))
diff --git a/tests/opnReqTests/rst.sh b/tests/opnReqTests/rst.sh
index f01b2ca0cf..ae07c6243f 100644
--- a/tests/opnReqTests/rst.sh
+++ b/tests/opnReqTests/rst.sh
@@ -28,6 +28,9 @@ elif [[ $application == 'cpld' ]]; then
   CICE_RUNTYPE='continue'
   RUNTYPE='continue'
   CICE_USE_RESTART_TIME='.true.'
+  if [[ ${CICE_tr_fsd} ]]; then
+    CICE_restart_fsd='.true.'
+  fi
   MOM6_RESTART_SETTING="r"
   RESTART_N=$(( FHMAX - FHROT ))
   RESTART_FILE_PREFIX="${SYEAR}${SMONTH}${SDAY}.$(printf "%02d" $(( SHOUR + FHROT  )))0000"
@@ -75,6 +78,7 @@ export NSTF_NAME=${NSTF_NAME}
 export CICE_RUNTYPE=${CICE_RUNTYPE:-}
 export RUNTYPE=${RUNTYPE:-}
 export CICE_USE_RESTART_TIME=${CICE_USE_RESTART_TIME:-}
+export CICE_restart_fsd=${CICE_restart_fsd:-}
 export MOM6_RESTART_SETTING=${MOM6_RESTART_SETTING:-}
 export RESTART_N=${RESTART_N:-}
 export RESTART_FILE_SUFFIX_SECS=${RESTART_FILE_SUFFIX_SECS:-}
diff --git a/tests/parm/ice_in.IN b/tests/parm/ice_in.IN
index e0a29ecacb..e53a7a822e 100644
--- a/tests/parm/ice_in.IN
+++ b/tests/parm/ice_in.IN
@@ -65,11 +65,10 @@
     kmt_file     = '@[CICE_MASK]'
     kcatbound    = 0
     ncat         = 5
-    nfsd         = 1
+    nfsd         = @[CICE_nfsd]
     nilyr        = 7
     nslyr        = 1
     nblyr        = 1
-    nfsd         = 1
     grid_atm     = '@[CICE_GRIDATM]'
     grid_ocn     = '@[CICE_GRIDOCN]'
     grid_ice     = '@[CICE_GRIDICE]'
@@ -88,8 +87,8 @@
     restart_pond_lvl  = @[CICE_RESTART_POND_LVL]
     tr_aero      = .false.
     restart_aero = .false.
-    tr_fsd       = .false.
-    restart_fsd  = .false.
+    tr_fsd       = @[CICE_tr_fsd]
+    restart_fsd  = @[CICE_restart_fsd]
 /
 
 &thermo_nml
@@ -172,6 +171,7 @@
     l_mpond_fresh   = .false.
     tfrz_option     = '@[CICE_TFREEZE_OPTION]'
     restart_coszen  = .true.
+    wave_spec_type  = '@[CICE_wave_spec_type]'
 /
 
 &domain_nml
@@ -383,5 +383,21 @@
     f_Cdn_ocn      = 'x'
 /
 
+&icefields_fsd_nml
+    f_fsdrad       = 'mdhxx'
+    f_fsdperim     = 'mdhxx'
+    f_afsd         = 'mdhxx'
+    f_afsdn        = 'mdhxx'
+    f_dafsd_newi   = 'x'
+    f_dafsd_latg   = 'x'
+    f_dafsd_latm   = 'x'
+    f_dafsd_wave   = 'x'
+    f_dafsd_weld   = 'x'
+    f_wave_sig_ht  = 'x'
+    f_aice_ww      = 'x'
+    f_diam_ww      = 'x'
+    f_hice_ww      = 'x'
+/
+
 &icefields_bgc_nml
 /
diff --git a/tests/parm/ufs.configure.s2sw.IN b/tests/parm/ufs.configure.s2sw.IN
index 95f35864bf..de0bd1ec99 100644
--- a/tests/parm/ufs.configure.s2sw.IN
+++ b/tests/parm/ufs.configure.s2sw.IN
@@ -134,4 +134,5 @@ ALLCOMP_attributes::
       orb_mode = fixed_year
       orb_mvelp = 1.e36
       orb_obliq = 1.e36
+      wav_coupling_to_cice = @[wav_coupling_to_cice]
 ::
diff --git a/tests/rt.conf b/tests/rt.conf
index dbd84e0cb1..0b79583b16 100644
--- a/tests/rt.conf
+++ b/tests/rt.conf
@@ -78,14 +78,14 @@ RUN | cpld_restart_c48                                  | - noaacloud
 COMPILE | s2swa_faster | intel | -DAPP=S2SWA -DCCPP_SUITES=FV3_GFS_v17_coupled_p8 -DFASTER=ON | - noaacloud  | fv3 |
 RUN | cpld_control_p8_faster                            | - noaacloud                          | baseline |
 
-# Unstructured WW3 mesh
-COMPILE | s2sw_pdlib | intel | -DAPP=S2SW -DCCPP_SUITES=FV3_GFS_v17_coupled_p8 -DPDLIB=ON | - noaacloud | fv3 |
-RUN | cpld_control_pdlib_p8                             | - noaacloud			       | baseline |
-RUN | cpld_restart_pdlib_p8                             | - noaacloud                          |          | cpld_control_pdlib_p8
-RUN | cpld_mpi_pdlib_p8                                 | - noaacloud                          |          | cpld_control_pdlib_p8
-
-COMPILE | s2sw_pdlib_debug | intel | -DAPP=S2SW -DCCPP_SUITES=FV3_GFS_v17_coupled_p8 -DPDLIB=ON -DDEBUG=ON | - noaacloud | fv3 |
-RUN | cpld_debug_pdlib_p8                               | - noaacloud		               | baseline |
+# Unstructured WW3 mesh with wave-ice coupling
+COMPILE | s2sw_pdlib | intel | -DAPP=S2SW -DCCPP_SUITES=FV3_GFS_v17_coupled_p8 -DPDLIB=ON -DWAVICE=ON | - noaacloud | fv3 |
+RUN | cpld_control_pdlib_p8                             | - noaacloud                | baseline |
+RUN | cpld_restart_pdlib_p8                             | - noaacloud                |          | cpld_control_pdlib_p8
+RUN | cpld_mpi_pdlib_p8                                 | - noaacloud                |          | cpld_control_pdlib_p8
+
+COMPILE | s2sw_pdlib_debug | intel | -DAPP=S2SW -DCCPP_SUITES=FV3_GFS_v17_coupled_p8 -DPDLIB=ON -DDEBUG=ON -DWAVICE=ON | - noaacloud | fv3 |
+RUN | cpld_debug_pdlib_p8                               | - noaacloud                | baseline |
 
 ### ATM tests ###
 COMPILE | atm_dyn32 | intel | -DAPP=ATM -DCCPP_SUITES=FV3_GFS_v16,FV3_GFS_v16_flake,FV3_GFS_v17_p8,FV3_GFS_v17_p8_rrtmgp,FV3_GFS_v15_thompson_mynn_lam3km,FV3_WoFS_v0,FV3_GFS_v17_p8_mynn,FV3_GFS_v17_p8_ugwpv1 -D32BIT=ON | | fv3 |
diff --git a/tests/tests/cpld_control_pdlib_p8 b/tests/tests/cpld_control_pdlib_p8
index 17bb7805ef..6bd1532b78 100644
--- a/tests/tests/cpld_control_pdlib_p8
+++ b/tests/tests/cpld_control_pdlib_p8
@@ -94,7 +94,15 @@ export eps_imesh=2.5e-1
 
 export WW3_DOMAIN=global_270k
 export MESH_WAV=mesh.${WW3_DOMAIN}.nc
-export WW3_MODDEF=mod_def.exp.${WW3_DOMAIN}
+export WW3_MODDEF=mod_def.ic4.exp.${WW3_DOMAIN}
+export WW3_ICE='C'
+export WW3_IC1='C'
+export WW3_IC5='C'
+export CICE_nfsd=12
+export CICE_tr_fsd=.true.
+export CICE_restart_fsd=.false.
+export CICE_wave_spec_type=constant
+export wav_coupling_to_cice=true
 
 export DIAG_TABLE=diag_table_template
 export FIELD_TABLE=field_table_thompson_noaero_tke
diff --git a/tests/tests/cpld_debug_pdlib_p8 b/tests/tests/cpld_debug_pdlib_p8
index fa7be3c086..d3c503e2e1 100644
--- a/tests/tests/cpld_debug_pdlib_p8
+++ b/tests/tests/cpld_debug_pdlib_p8
@@ -87,7 +87,15 @@ export CICE_DIAGFREQ=`expr $((FHMAX-$FHROT)) \* 3600 / $DT_CICE`
 
 export WW3_DOMAIN=global_270k
 export MESH_WAV=mesh.${WW3_DOMAIN}.nc
-export WW3_MODDEF=mod_def.exp.${WW3_DOMAIN}
+export WW3_MODDEF=mod_def.ic4.exp.${WW3_DOMAIN}
+export WW3_ICE='C'
+export WW3_IC1='C'
+export WW3_IC5='C'
+export CICE_nfsd=12
+export CICE_tr_fsd=.true.
+export CICE_restart_fsd=.false.
+export CICE_wave_spec_type=constant
+export wav_coupling_to_cice=true
 
 export DIAG_TABLE=diag_table_template
 export FIELD_TABLE=field_table_thompson_noaero_tke
diff --git a/tests/tests/cpld_mpi_pdlib_p8 b/tests/tests/cpld_mpi_pdlib_p8
index 18dcc1ee74..032d2a92ba 100644
--- a/tests/tests/cpld_mpi_pdlib_p8
+++ b/tests/tests/cpld_mpi_pdlib_p8
@@ -97,7 +97,15 @@ export eps_imesh=2.5e-1
 
 export WW3_DOMAIN=global_270k
 export MESH_WAV=mesh.${WW3_DOMAIN}.nc
-export WW3_MODDEF=mod_def.exp.${WW3_DOMAIN}
+export WW3_MODDEF=mod_def.ic4.exp.${WW3_DOMAIN}
+export WW3_ICE='C'
+export WW3_IC1='C'
+export WW3_IC5='C'
+export CICE_nfsd=12
+export CICE_tr_fsd=.true.
+export CICE_restart_fsd=.false.
+export CICE_wave_spec_type=constant
+export wav_coupling_to_cice=true
 
 export DIAG_TABLE=diag_table_template
 export FIELD_TABLE=field_table_thompson_noaero_tke
diff --git a/tests/tests/cpld_restart_pdlib_p8 b/tests/tests/cpld_restart_pdlib_p8
index 01a351be21..e491a5ff0e 100644
--- a/tests/tests/cpld_restart_pdlib_p8
+++ b/tests/tests/cpld_restart_pdlib_p8
@@ -101,7 +101,15 @@ export CICE_DIAGFREQ=`expr $((FHMAX-$FHROT)) \* 3600 / $DT_CICE`
 
 export WW3_DOMAIN=global_270k
 export MESH_WAV=mesh.${WW3_DOMAIN}.nc
-export WW3_MODDEF=mod_def.exp.${WW3_DOMAIN}
+export WW3_MODDEF=mod_def.ic4.exp.${WW3_DOMAIN}
+export WW3_ICE='C'
+export WW3_IC1='C'
+export WW3_IC5='C'
+export CICE_nfsd=12
+export CICE_tr_fsd=.true.
+export CICE_restart_fsd=.false.
+export CICE_wave_spec_type=constant
+export wav_coupling_to_cice=true
 
 export DIAG_TABLE=diag_table_template
 export FIELD_TABLE=field_table_thompson_noaero_tke