diff --git a/science/Makefile b/science/Makefile
index e69aabfe297c..40cd5b04bdd2 100644
--- a/science/Makefile
+++ b/science/Makefile
@@ -106,6 +106,7 @@
     SUBDIR += qcl
     SUBDIR += ruby-dcl
     SUBDIR += ruby-gphys
+    SUBDIR += silo
     SUBDIR += simlib
     SUBDIR += svmlight
     SUBDIR += szip
diff --git a/science/silo/Makefile b/science/silo/Makefile
new file mode 100644
index 000000000000..4e92518570d8
--- /dev/null
+++ b/science/silo/Makefile
@@ -0,0 +1,78 @@
+# New ports collection makefile for:	silo
+# Date created:		17 jul 2008
+# Whom: 		Pedro F. Giffuni <giffunip@tutopia.com>
+#
+# $FreeBSD$
+#
+
+PORTNAME=	silo
+PORTVERSION=	4.6.1
+CATEGORIES=	science
+MASTER_SITES=	https://wci.llnl.gov/codes/${PORTNAME}/silo-${PORTVERSION}/
+
+MAINTAINER=	giffunip@tutopia.com
+COMMENT=	A mesh and field I/O library and scientific database
+
+LIB_DEPENDS=	netcdf.4:${PORTSDIR}/science/netcdf
+
+USE_AUTOTOOLS=	libtool:15
+GNU_CONFIGURE=	yes
+CONFIGURE_ENV=	CPPFLAGS="${CFLAGS} ${PTHREAD_CFLAGS} -I${LOCALBASE}/include"	\
+		LDFLAGS="${LDFLAGS} ${PTHREAD_LIBS} -L${LOCALBASE}/lib"
+
+USE_GMAKE=	yes
+CONFIGURE_ARGS= --enable-shared
+USE_LDCONFIG=	yes
+
+USE_XLIB=	yes
+USE_QT_VER=	3
+QT_COMPONENTS=	moc uic
+
+OPTIONS=	PYTHON	"Enable Python Module" On \
+		HDF5	"Enable HDF5 Driver" Off \
+		BROWSER	"Enable Silex Browser" Off \
+		FORTRAN "Compile Fortran interface" Off \
+		OPTIMIZATION "Enable extra optimizations" On
+
+.include <bsd.port.pre.mk>
+
+.ifdef WITH_PYTHON
+USE_PYTHON=	yes
+CONFIGURE_ARGS+=	--enable-pythonmodule
+PLIST_SUB+=	WITH_PYTHON=""
+.else
+PLIST_SUB+=	WITH_PYTHON="@comment "
+.endif
+
+.ifdef WITH_HDF5
+LIB_DEPENDS+=	hdf5.0:${PORTSDIR}/science/hdf5
+CONFIGURE_ARGS= --with-hdf5=${LOCALBASE}
+PLIST_SUB+=	WITH_HDF5=""
+PLIST_SUB+=	WITH_HDF5="@comment "
+.else
+PLIST_SUB+=	WITH_HDF5="@comment "
+PLIST_SUB+=	WITH_NCDF=""
+.endif
+
+.ifdef WITH_BROWSER
+CONFIGURE_ARGS+=	--enable-silex
+PLIST_SUB+=	WITH_BROWSER=""
+.else
+PLIST_SUB+=	WITH_BROWSER="@comment "
+.endif
+
+.ifdef WITH_FORTRAN
+USE_FORTRAN=	yes
+CONFIGURE_ARGS+=	--enable-fortran
+.else
+CONFIGURE_ARGS+=	--disable-fortran
+.endif
+
+.ifdef WITH_OPTIMIZATION
+CONFIGURE_ARGS+=	--enable-optimization
+.endif
+
+regression-test: build
+	@cd ${WRKSRC} && ${SETENV} ${MAKE_ENV} ${GMAKE} check
+
+.include <bsd.port.post.mk>
diff --git a/science/silo/distinfo b/science/silo/distinfo
new file mode 100644
index 000000000000..bdd51fae619a
--- /dev/null
+++ b/science/silo/distinfo
@@ -0,0 +1,3 @@
+MD5 (silo-4.6.1.tar.gz) = 34b030e8c098b89bd79ee1b23477b283
+SHA256 (silo-4.6.1.tar.gz) = 8e5c314db468613a2a6ddf7c3ce07a0a9f969e854e5957011f0cade184bf0ac7
+SIZE (silo-4.6.1.tar.gz) = 2618748
diff --git a/science/silo/files/patch-tests+Makefile.in b/science/silo/files/patch-tests+Makefile.in
new file mode 100644
index 000000000000..2107a7d28f34
--- /dev/null
+++ b/science/silo/files/patch-tests+Makefile.in
@@ -0,0 +1,11 @@
+--- tests/Makefile.in.orig	2008-03-27 13:56:49.000000000 -0500
++++ tests/Makefile.in	2008-03-27 13:57:36.000000000 -0500
+@@ -407,7 +407,7 @@
+ INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+ LDFLAGS = @LDFLAGS@
+ LIBOBJS = @LIBOBJS@
+-LIBS = @LIBS@
++LIBS = @LIBS@ -lcompat
+ LIBTOOL = @LIBTOOL@
+ LN_S = @LN_S@
+ LOCAL = @LOCAL@
diff --git a/science/silo/pkg-descr b/science/silo/pkg-descr
new file mode 100644
index 000000000000..d63472f11c2b
--- /dev/null
+++ b/science/silo/pkg-descr
@@ -0,0 +1,24 @@
+A mesh and field I/O library and scientific database
+
+Silo is a library for reading and writing a wide variety of scientific 
+data to binary, disk files. The files Silo produces and the data within 
+them can be easily shared and exchanged between wholly independently 
+developed applications running on disparate computing platforms. 
+
+Consequently, Silo facilitates the development of general purpose tools 
+for processing scientific data. One of the more popular tools that process 
+Silo data files is the VisIt visualization tool.
+
+Silo supports gridless (point) meshes, structured meshes, unstructured-zoo 
+and unstructured-arbitrary-polyhedral meshes, block structured AMR meshes, 
+constructive solid geometry (CSG) meshes, piecewise-constant (e.g. 
+zone-centered) and piecewise-linear (e.g. node-centered) variables defined 
+on the node, edge, face or volume elements of meshes as well as the 
+decomposition of meshes into arbitrary subset hierarchies including 
+materials and mixing materials. In addition, Silo supports a wide variety 
+of other useful objects to address various scientific computing 
+application needs.Although the Silo library is a serial library, it has 
+some key features which enable it to be applied quite effectively and 
+scalably in parallel.
+
+WWW: https://wci.llnl.gov/codes/silo/
diff --git a/science/silo/pkg-plist b/science/silo/pkg-plist
new file mode 100644
index 000000000000..48a489b9e50f
--- /dev/null
+++ b/science/silo/pkg-plist
@@ -0,0 +1,16 @@
+%%WITH_BROWSER%%bin/browser
+bin/silodiff
+bin/silex
+bin/silock
+include/silo.h
+include/silo.inc
+include/pmpio.h
+%%WITH_PYTHON%%lib/Silo.a
+%%WITH_PYTHON%%lib/Silo.la
+%%WITH_PYTHON%%lib/Silo.so
+%%WITH_NCDF%%lib/libsilo.a
+%%WITH_NCDF%%lib/libsilo.la
+%%WITH_NCDF%%lib/libsilo.so
+%%WITH_HDF5%%lib/libsiloh5.a
+%%WITH_HDF5%%lib/libsiloh5.la
+%%WITH_HDF5%%lib/libsiloh5.so