diff --git a/olaflow/processing/sws_ola.py b/olaflow/processing/sws_ola.py
new file mode 100644
index 0000000..f0083e2
--- /dev/null
+++ b/olaflow/processing/sws_ola.py
@@ -0,0 +1,47 @@
+import argparse
+import configparser
+import logging
+import pathlib
+import re
+
+import matplotlib.pyplot as plt
+import numpy as np
+from fluidfoam import readof
+from scipy import interpolate
+
+parser = argparse.ArgumentParser(
+    description="Convert swash output to olaFlow input"
+)
+parser.add_argument("-v", "--verbose", action="count", default=0)
+args = parser.parse_args()
+
+logging.basicConfig(level=max((10, 20 - 10 * args.verbose)))
+log = logging.getLogger("sws_ola")
+
+log.info("Starting sws -> olaFlow converter")
+config = configparser.ConfigParser()
+config.read("config.ini")
+
+sws_out = pathlib.Path(config.get("swash", "npz_out"))
+sws = np.load(sws_out.joinpath("sws.npz"))
+
+x, t = sws["x"], sws["t"]
+
+olaflow_root = pathlib.Path(config.get("olaflow", "root"))
+of_x, of_y, of_z = mesh = readof.readmesh(str(olaflow_root))
+
+watl = interpolate.interp1d(x, sws["watl"][680])
+
+with open(olaflow_root.joinpath("0", "alpha.water"), "r") as aw_file:
+    aw_raw = aw_file.read()
+
+with open(olaflow_root.joinpath("0", "alpha.water"), "w") as aw_file:
+    aw_file.write(
+        re.sub(
+            r"(?<=\(\n).*?(?=\n\))",
+            "\n".join(map(str, alpha_water)),
+            aw_raw,
+            count=1,
+            flags=re.S,
+        )
+    )