diff --git a/science/hdf/Makefile b/science/hdf/Makefile
index d704ede5fd12..0972e8ad6f8d 100644
--- a/science/hdf/Makefile
+++ b/science/hdf/Makefile
@@ -1,55 +1,47 @@
 PORTNAME=	hdf
-DISTVERSION=	4.3.0
-PORTREVISION=	2
+PORTVERSION=	4.3.1
 PORTEPOCH=	1
 CATEGORIES=	science archivers graphics
-MASTER_SITES=	https://github.com/HDFGroup/hdf4/releases/download/hdf${DISTVERSION}/
-DISTNAME=	hdf${DISTVERSION}
+MASTER_SITES=	https://github.com/HDFGroup/hdf4/releases/download/hdf${PORTVERSION}/
+DISTNAME=	hdf${PORTVERSION}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Hierarchical Data Format library (from NCSA)
-WWW=		https://www.hdfgroup.org/solutions/hdf4/
+WWW=		https://www.hdfgroup.org/solutions/hdf4/ \
+		https://github.com/HDFGroup/hdf4
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-NOT_FOR_ARCHS=		aarch64 armv6 armv7
+NOT_FOR_ARCHS=	aarch64 armv6 armv7
 NOT_FOR_ARCHS_REASON=	fails to compile: no machine type has been defined
 
 LIB_DEPENDS=	libsz.so:science/libaec
 
 USES=		fortran jpeg libtool
-USE_LDCONFIG=	yes
-
-WRKSRC=		${WRKDIR}/hdfsrc
 
-GNU_CONFIGURE=	yes
+FFLAGS+=	-fallow-argument-mismatch
 CONFIGURE_ARGS=	--enable-shared \
 		--with-jpeg=${LOCALBASE} \
 		--with-szlib=${LOCALBASE}
-
+GNU_CONFIGURE=	yes
 INSTALL_TARGET=	install-strip
 TEST_TARGET=	check
+USE_LDCONFIG=	yes
+WRKSRC=		${WRKDIR}/hdf-${PORTVERSION}
 
-OPTIONS_DEFINE=		JAVA
-OPTIONS_DEFAULT=	JAVA
-OPTIONS_SUB=		yes
+PLIST_SUB=	PORTVERSION=${PORTVERSION}
+
+CONFLICTS_INSTALL=	netcdf-4.[0-9]*
+
+OPTIONS_DEFINE=	JAVA
+OPTIONS_DEFAULT=JAVA
+OPTIONS_SUB=	yes
 
 JAVA_CONFIGURE_ENABLE=	java
-JAVA_USES=		java:build
-JAVA_VARS=		JAVA_VERSION=17
 JAVA_CONFIGURE_ENV=	JAVA_HOME=${JAVA_HOME} \
 			PATH=${JAVA_HOME}/bin:${PATH}
 JAVA_MAKE_ENV=		PATH=${JAVA_HOME}/bin:${PATH}
+JAVA_USES=		java:build
 
-.include <bsd.port.pre.mk>
-
-.if ${GCC_DEFAULT} >= 10
-# workaround for Type mismatch between actual argument at (1) and actual argument at (2) (CHARACTER(0)/INTEGER(4)).
-# in theory, this should set FCFLAGS, but the port does not conform
-FFLAGS+=	-fallow-argument-mismatch
-.endif
-
-CONFLICTS_INSTALL=	netcdf-4.[0-9]*
-
-.include <bsd.port.post.mk>
+.include <bsd.port.mk>
diff --git a/science/hdf/distinfo b/science/hdf/distinfo
index a2c3b55e4c1c..b328eceb5155 100644
--- a/science/hdf/distinfo
+++ b/science/hdf/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1727142524
-SHA256 (hdf4.3.0.tar.gz) = 282b244a819790590950f772095abcaeef405b0f17d2ee1eb5039da698cf938b
-SIZE (hdf4.3.0.tar.gz) = 18408537
+TIMESTAMP = 1779520112
+SHA256 (hdf4.3.1.tar.gz) = a2c69eb752aee385b73d4255e4387134dd5e182780d64da0a5cb0d6e1d3dea3b
+SIZE (hdf4.3.1.tar.gz) = 9366549
diff --git a/science/hdf/pkg-descr b/science/hdf/pkg-descr
index 31226f04054e..19a726a0ee67 100644
--- a/science/hdf/pkg-descr
+++ b/science/hdf/pkg-descr
@@ -1,17 +1,8 @@
-HDF4 (originally known as HDF) is file format for storing scientific data
-and a software library that provides high-level APIs and a low-level data
-access interface.
+HDF4 is a library and multi-object file format for storing and managing data
+between machines. HDF4 is a very different technology than HDF5. The HDF Group
+recommends that, other than for working with existing HDF4 data, new
+applications use HDF5 since HDF5 addresses important deficiencies of HDF4.
 
-HDF technologies at present include two data management formats (HDF4 and
-HDF5) and libraries, a modular data browser/editor, associated tools and
-utilities, and a conversion library.  Both HDF4 and HDF5 were designed to
-be a general scientific format, adaptable to virtually any scientific or
-engineering application, and also have been used successfully in non-
-technical areas.  The Open Source format is a key technological foundation
-for HDF core technologies.  It allows users to collaborate with The HDF
-Group regarding functionality requirements and permits users' experience
-and knowledge to be incorporated into the HDF product when appropriate.
-
-It also permits users and organizations without adequate technology
-resources to use a sophisticated and robust data management tool for no
-charge.
+Although The HDF Group maintains HDF4 by fixing defects and porting it to new
+operating environments, there is no longer any new development occurring. HDF4
+is considered deprecated and new products should be developed in HDF5.
diff --git a/science/hdf/pkg-plist b/science/hdf/pkg-plist
index 8160e961785f..6a8729fe6d01 100644
--- a/science/hdf/pkg-plist
+++ b/science/hdf/pkg-plist
@@ -1,62 +1,62 @@
 bin/gif2hdf
 bin/h4cc
 bin/h4redeploy
 bin/hdf24to8
 bin/hdf2gif
 bin/hdf2jpeg
 bin/hdf8to24
 bin/hdfcomp
 bin/hdfed
 bin/hdfimport
 bin/hdfls
 bin/hdfpack
 bin/hdftopal
 bin/hdftor8
 bin/hdfunpac
 bin/hdiff
 bin/hdp
 bin/hrepack
 bin/jpeg2hdf
 bin/ncdump
 bin/ncgen
 bin/paltohdf
 bin/r8tohdf
 bin/ristosds
 bin/vmake
 bin/vshow
 include/H4api_adpt.h
 include/df.h
 include/h4config.h
 include/hbitio.h
 include/hcomp.h
 include/hdatainfo.h
 include/hdf.h
 include/hdf2netcdf.h
 include/herr.h
 include/hfile.h
 include/hlimits.h
 include/hntdefs.h
 include/hproto.h
 include/htags.h
 include/mfan.h
 include/mfdatainfo.h
 include/mfgr.h
 include/mfhdf.h
 include/netcdf.h
 include/vg.h
-%%JAVA%%lib/jarhdf-4.2.17-1.jar
+%%JAVA%%lib/jarhdf-%%PORTVERSION%%.jar
 lib/libdf.a
 lib/libdf.so
 lib/libdf.so.2
 lib/libdf.so.2.0.0
 lib/libhdf4.settings
 %%JAVA%%lib/libhdf_java.a
 %%JAVA%%lib/libhdf_java.so
 %%JAVA%%lib/libhdf_java.so.0
 %%JAVA%%lib/libhdf_java.so.0.0.0
 lib/libmfhdf.a
 lib/libmfhdf.so
 lib/libmfhdf.so.3
 lib/libmfhdf.so.3.0.0
 share/man/man1/ncdump.1.gz
 share/man/man1/ncgen.1.gz