diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 835e3b2e..7fe27c52 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -27,10 +27,14 @@ jobs:
 
   call-windows:
     uses: ./.github/workflows/windows.yml
+    with:
+      publish: true
 
 
   call-windows-arm:
     uses: ./.github/workflows/windows-arm.yml
+    with:
+      publish: true
 
 
 # -------------------------------------------------------------------------------------
diff --git a/.github/workflows/windows-arm.yml b/.github/workflows/windows-arm.yml
index 6737c5bd..863f7bef 100644
--- a/.github/workflows/windows-arm.yml
+++ b/.github/workflows/windows-arm.yml
@@ -7,7 +7,15 @@ on:
     branches:
       - main
       - maintenance/**
+  workflow_dispatch: null
+  schedule:
+    - cron: '0 0 * * 0'
   workflow_call:
+    inputs:
+      publish:
+        type: boolean
+        default: false
+        required: false
 
 
 env:
@@ -29,6 +37,10 @@ jobs:
 
     env:
       INTERFACE64: ${{ matrix.INTERFACE64 }}
+      # A scheduled or manually triggered run builds against the latest
+      # OpenBLAS HEAD instead of openblas_commit.txt
+      # A run called from publish.yml builds the pinned commit.
+      NIGHTLY: ${{ inputs.publish == false && (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch') }}
 
     steps:
 
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 61cc83b5..62eeecd3 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -8,7 +8,14 @@ on:
       - main
       - maintenance/**
   workflow_dispatch: null
+  schedule:
+    - cron: '0 0 * * 0'
   workflow_call:
+    inputs:
+      publish:
+        type: boolean
+        default: false
+        required: false
 
 env:
   OPENBLAS_ROOT: "c:\\opt"
@@ -30,6 +37,12 @@ jobs:
       fail-fast: false
     runs-on: ${{ matrix.os }}
 
+    env:
+      # A scheduled or manually triggered run builds against the latest
+      # OpenBLAS HEAD instead of openblas_commit.txt
+      # A run called from publish.yml builds the pinned commit.
+      NIGHTLY: ${{ inputs.publish == false && (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch') }}
+
     timeout-minutes: 90
     steps:
     - uses: actions/checkout@v6.0.1
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 39d527e6..4131c26d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## OpenBLAS v0.3.34 (v0.3.34)
 
+### 0.3.34.481.1 (2026-10-29)
+
+- Add a weekly scheduled run to both Windows workflows against OpenBLAS HEAD.
+
 ### 0.3.34.481.0 (2026-10-20)
 
 - update to latest develop HEAD, fix `NO_LIBGFORTRAN` patch
diff --git a/pyproject.toml b/pyproject.toml
index cbf16624..1a9d4830 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "scipy-openblas64"
 # 0.3.34-481-g5137bb62
-version = "0.3.34.481.0"
+version = "0.3.34.481.1"
 requires-python = ">=3.7"
 description = "Provides OpenBLAS for python packaging"
 readme = "README.md"
diff --git a/tools/build_steps_win_arm64.bat b/tools/build_steps_win_arm64.bat
index 02b4488d..94b1c0f3 100755
--- a/tools/build_steps_win_arm64.bat
+++ b/tools/build_steps_win_arm64.bat
@@ -62,7 +62,14 @@ set /p OPENBLAS_COMMIT=<openblas_commit.txt
  
 REM Enter OpenBLAS directory and checkout buildable commit
 cd OpenBLAS
-git checkout %OPENBLAS_COMMIT%
+if "%NIGHTLY%"=="true" (
+    REM Build the latest HEAD of develop
+    git fetch origin
+    git checkout -B develop origin/develop
+) else (
+    git checkout %OPENBLAS_COMMIT%
+)
+if errorlevel 1 exit /b 1
 git merge-base --is-ancestor %first_woa_buildable_commit% HEAD 2>NUL
 if errorlevel 1 (
     echo OpenBLAS commit does not contain WoA build fixes.
@@ -82,6 +89,12 @@ REM Patch VERSION
 REM version=$(grep "^version =" ../pyproject.toml | sed 's/version = "//;s/"//')
 REM sed -e "s/^VERSION = .*/VERSION = ${version}/" -i.bak Makefile.rule
 
+if "%NIGHTLY%"=="true" (
+    REM v0.3.24-30-g138ed79f -> 0.3.24.30.0 in pyproject.toml
+    powershell -Command "$v = ((git describe --tags --abbrev=8) -replace '^v(.*)-g.*', '$1') -replace '-', '.'; (Get-Content ..\pyproject.toml) -replace '^version = .*', ('version = \"' + $v + '.0\"') | Set-Content ..\pyproject.toml"
+    if errorlevel 1 exit /b 1
+)
+
 for /f "tokens=3 delims= " %%v in ('findstr /b "version = " ..\pyproject.toml') do set version=%%v
 set version=%version:"=%
 REM cwd is already OpenBLAS here, so the source is Makefile.rule, not
diff --git a/tools/build_steps_windows.sh b/tools/build_steps_windows.sh
index 3a792989..0674e3c8 100644
--- a/tools/build_steps_windows.sh
+++ b/tools/build_steps_windows.sh
@@ -49,7 +49,12 @@ git submodule update --init --recursive
 
 # Get / clean code
 git fetch origin
-git checkout $(cat ../openblas_commit.txt)
+if [ "$NIGHTLY" == "true" ]; then
+    # Build the latest HEAD of develop
+    git checkout -B develop origin/develop
+else
+    git checkout $(cat ../openblas_commit.txt)
+fi
 git clean -fxd
 git reset --hard
 rm -rf $openblas_root/$build_bits
@@ -100,7 +105,13 @@ for p in ../patches-common/*.patch ../patches-windows/*.patch; do
 done
 
 # Patch VERSION
-version=$(grep "^version =" ../pyproject.toml | sed 's/version = "//;s/"//')
+if [ "$NIGHTLY" == "true" ]; then
+    # v0.3.24-30-g138ed79f -> 0.3.24.30.0 in pyproject.toml
+    version=$(echo $OPENBLAS_VERSION | sed -e "s/^v\(.*\)-g.*/\1/" | sed -e "s/-/./g").0
+    sed -e "s/^version = .*/version = \"${version}\"/" -i.bak ../pyproject.toml
+else
+    version=$(grep "^version =" ../pyproject.toml | sed 's/version = "//;s/"//')
+fi
 sed -e "s/^VERSION = .*/VERSION = ${version}/" -i.bak Makefile.rule
 
 # Build OpenBLAS