diff --git a/configs/common/packages_nvhpc.yaml b/configs/common/packages_nvhpc.yaml
new file mode 100644
index 000000000..57b74373e
--- /dev/null
+++ b/configs/common/packages_nvhpc.yaml
@@ -0,0 +1,99 @@
+packages:
+  # Compiler preferences
+  c:
+    prefer:
+    - nvhpc
+  cxx:
+    prefer:
+    - nvhpc
+  fortran:
+    prefer:
+    - nvhpc
+  # Virtual provider settings
+  blas:
+    require:
+    - nvhpc
+  fftw-api:
+    require:
+    - fftw
+    #- nvpl-fft
+  lapack:
+    require:
+    - nvhpc
+  # Individual package settings
+  antlr:
+    require:
+    - '%c,cxx=gcc'
+  bison:
+    require:
+    - '%c,cxx=gcc'
+  cmake:
+    require:
+    - '%c,cxx=gcc'
+  curl:
+    require:
+    - '%c=gcc'
+  ectrans:
+    require:
+    - +fftw
+  file:
+    require:
+    - '%c=gcc'
+  gmake:
+    require:
+    - '%c=gcc'
+  go:
+    require:
+    - '%c,cxx=gcc'
+  # https://github.com/NOAA-EMC/NCEPLIBS-ip/issues/320
+  ip:
+    require:
+    - ~openmp
+  libbsd:
+    require:
+    - '%c=gcc'
+  libffi:
+    require:
+    - '%c=gcc'
+  libiconv:
+    require:
+    - '%c=gcc'
+  libmd:
+    require:
+    - '%c=gcc'
+  libxml2:
+    require:
+    - '%c=gcc'
+  ninja:
+    require:
+    - '%c=gcc'
+  nco:
+    require:
+    - '%c,cxx=gcc'
+  numactl:
+    require:
+    - '%c=gcc'
+  patchelf:
+    require:
+    - '%c=gcc'
+  pkg-config:
+    require:
+    - '%c=gcc'
+  python:
+    require:
+    - '%c=gcc'
+  py-cython:
+    require:
+    - '%c=gcc'
+  py-mpi4py:
+    require:
+    - '%c,cxx=gcc'  
+  py-numpy:
+    require:
+    - '%c,cxx=gcc'
+  rust:
+    require:
+    - '%c,cxx=gcc'
+  zstd:
+    require:
+    - '%c,cxx=gcc'
\ No newline at end of file
diff --git a/configs/sites/tier2/bounty/README_gcc-14.2.1.yaml b/configs/sites/tier2/bounty/README_gcc-14.2.1.md
similarity index 100%
rename from configs/sites/tier2/bounty/README_gcc-14.2.1.yaml
rename to configs/sites/tier2/bounty/README_gcc-14.2.1.md
diff --git a/configs/sites/tier2/bounty/README_nvhpc-26.5.md b/configs/sites/tier2/bounty/README_nvhpc-26.5.md
new file mode 100644
index 000000000..21c9ea680
--- /dev/null
+++ b/configs/sites/tier2/bounty/README_nvhpc-26.5.md
@@ -0,0 +1,13 @@
+WSL 2 Alma Linux 9 installation notes for NVHPC 26.5 compiler
+
+# Download and install nvhpc, for example:
+wget https://developer.download.nvidia.com/hpc-sdk/26.5/nvhpc_2026_265_Linux_x86_64_cuda_13.2.tar.gz
+tar xpzf nvhpc_2026_265_Linux_x86_64_cuda_13.2.tar.gz
+nvhpc_2026_265_Linux_x86_64_cuda_13.2/install
+
+# Bug fix for missing include directory (symbolic link)
+cd <nvhpc-top-level-install-dir>
+ln -s Linux_x86_64/26.5/compilers/include include
+
+# Needed for hpcx
+yum install libnl3
diff --git a/configs/sites/tier2/bounty/packages_nvhpc-26.5.yaml b/configs/sites/tier2/bounty/packages_nvhpc-26.5.yaml
new file mode 100644
index 000000000..3094e5134
--- /dev/null
+++ b/configs/sites/tier2/bounty/packages_nvhpc-26.5.yaml
@@ -0,0 +1,37 @@
+packages:
+  all:
+    require:
+    - any_of: ['%nvhpc@=26.5']
+      when: '%nvhpc'
+    - any_of: ['%gcc@=11.5.0']
+      when: '%gcc'
+  mpi:
+    buildable: false
+    require:
+    #- "nvhpc@=26.5"
+    - "openmpi@=5.0.10"
+  nvhpc:
+    buildable: false
+    externals:
+    - spec: nvhpc@26.5+blas+lapack~mpi
+      prefix: /home/dom/prod/nvhpc-26.5
+      extra_attributes:
+        compilers:
+          c: /home/dom/prod/nvhpc-26.5/Linux_x86_64/26.5/compilers/bin/nvc
+          cxx: /home/dom/prod/nvhpc-26.5/Linux_x86_64/26.5/compilers/bin/nvc++
+          fortran: /home/dom/prod/nvhpc-26.5/Linux_x86_64/26.5/compilers/bin/nvfortran
+  gcc:
+    buildable: false
+    externals:
+    - spec: gcc@11.5.0 languages:='c,c++'
+      prefix: /usr
+      extra_attributes:
+        compilers:
+          c: /usr/bin/gcc
+          cxx: /usr/bin/g++
+          fortran: /usr/bin/gfortran
+  openmpi:
+    buildable: false
+    externals:
+    - spec: openmpi@5.0.10 ~internal-hwloc +two_level_namespace
+      prefix: /home/dom/prod/nvhpc-26.5/Linux_x86_64/26.5/comm_libs/13.2/hpcx/hpcx-2.50/ompi5
diff --git a/configs/templates/neptune-dev-nvhpc/spack.yaml b/configs/templates/neptune-dev-nvhpc/spack.yaml
new file mode 100644
index 000000000..adf6cfcc0
--- /dev/null
+++ b/configs/templates/neptune-dev-nvhpc/spack.yaml
@@ -0,0 +1,24 @@
+# Template for NEPTUNE development
+#
+spack:
+  concretizer:
+    unify: when_possible
+
+  view: false
+  include: []
+
+  specs:
+  #- dev-utils-env
+  - neptune-env ~debug +openmp +nvhpc +espc ~ncview ^esmf@=9.0.0b11
+  - neptune-env +debug +openmp +nvhpc +espc +ncview ^esmf@=9.0.0b11
+  - neptune-env ~debug ~openmp +nvhpc +espc +ncview ^esmf@=9.0.0b11
+  - neptune-env +debug ~openmp +nvhpc +espc +ncview ^esmf@=9.0.0b11
+
+  - py-numpy
+  #- crtm@3.1.3
+
+  packages:
+    # Turn on python variant for esmf
+    esmf:
+      require:
+      - +python
diff --git a/repos/spack_stack/spack_repo/spack_stack/packages/neptune_env/package.py b/repos/spack_stack/spack_repo/spack_stack/packages/neptune_env/package.py
index 4126b477e..f131fc928 100644
--- a/repos/spack_stack/spack_repo/spack_stack/packages/neptune_env/package.py
+++ b/repos/spack_stack/spack_repo/spack_stack/packages/neptune_env/package.py
@@ -24,6 +24,8 @@ class NeptuneEnv(BundlePackage):
     variant("ncview", default=False, description="Build ncview")
     variant("debug", default=False, description="Build debug version of selected dependencies")
     variant("openmp", default=True, description="Build OpenMP-enabled versions of dependencies")
+    # Because spack doesn't support "with when not"
+    variant("nvhpc", default=False, description="Flag to signal building with nvhpc")
 
     depends_on("base-env", type="run")
 
@@ -37,7 +39,9 @@ class NeptuneEnv(BundlePackage):
     depends_on("p4est", type="run")
     depends_on("w3emc", type="run")
     depends_on("ip ~openmp", type="run", when="~openmp")
-    depends_on("ip +openmp", type="run", when="+openmp")
+    # https://github.com/NOAA-EMC/NCEPLIBS-ip/issues/320
+    depends_on("ip ~openmp", type="run", when="+openmp +nvhpc")
+    depends_on("ip +openmp", type="run", when="+openmp ~nvhpc")
     depends_on("esmf ~debug ~openmp", type="run", when="~debug ~openmp")
     depends_on("esmf ~debug +openmp", type="run", when="~debug +openmp")
     depends_on("esmf +debug ~openmp", type="run", when="+debug ~openmp")
diff --git a/spack-ext/lib/jcsda-emc/spack-stack/stack/common.py b/spack-ext/lib/jcsda-emc/spack-stack/stack/common.py
index 5379715e1..5333e1c97 100644
--- a/spack-ext/lib/jcsda-emc/spack-stack/stack/common.py
+++ b/spack-ext/lib/jcsda-emc/spack-stack/stack/common.py
@@ -20,6 +20,7 @@
     "intel-oneapi-compilers-classic" : "intel",
     "intel-oneapi-compilers" : "oneapi",
     "llvm" : "llvm",
+    "nvhpc" : "nvhpc",
     # MPI
     "cray-mpich" : "cray-mpich",
     "intel-oneapi-mpi" : "impi",