diff --git a/opm/parser/eclipse/EclipseState/Schedule/Schedule.hpp b/opm/parser/eclipse/EclipseState/Schedule/Schedule.hpp
index a22aa5a14..4a4f2434f 100644
--- a/opm/parser/eclipse/EclipseState/Schedule/Schedule.hpp
+++ b/opm/parser/eclipse/EclipseState/Schedule/Schedule.hpp
@@ -190,6 +190,7 @@ namespace Opm
         size_t numGroups() const;
         size_t numGroups(size_t timeStep) const;
         bool hasGroup(const std::string& groupName) const;
+        bool hasGroup(const std::string& groupName, std::size_t timeStep) const;
         const Group2& getGroup2(const std::string& groupName, size_t timeStep) const;
 
         const Tuning& getTuning() const;
diff --git a/src/opm/parser/eclipse/EclipseState/Schedule/Schedule.cpp b/src/opm/parser/eclipse/EclipseState/Schedule/Schedule.cpp
index 09d48aec6..ac8c42ff8 100644
--- a/src/opm/parser/eclipse/EclipseState/Schedule/Schedule.cpp
+++ b/src/opm/parser/eclipse/EclipseState/Schedule/Schedule.cpp
@@ -2369,6 +2369,15 @@ void Schedule::handleGRUPTREE( const DeckKeyword& keyword, size_t currentStep, c
         return groups.count(groupName) > 0;
     }
 
+    bool Schedule::hasGroup(const std::string& groupName, std::size_t timeStep) const {
+        if (timeStep >= this->size())
+            return false;
+
+        auto grpMap = this->groups.find(groupName);
+
+        return (grpMap != this->groups.end())
+            && grpMap->second.at(timeStep);
+    }
 
     void Schedule::addGroupToGroup( const std::string& parent_group, const Group2& child_group, size_t timeStep) {
         // Add to new parent
diff --git a/tests/parser/ScheduleTests.cpp b/tests/parser/ScheduleTests.cpp
index 0977398f0..66f877450 100644
--- a/tests/parser/ScheduleTests.cpp
+++ b/tests/parser/ScheduleTests.cpp
@@ -526,6 +526,85 @@ BOOST_AUTO_TEST_CASE(EmptyScheduleHasFIELDGroup) {
     BOOST_CHECK_THROW( schedule.getGroup2("GROUP", 0) , std::invalid_argument );
 }
 
+BOOST_AUTO_TEST_CASE(HasGroup_At_Time) {
+    const auto input = std::string { R"(
+RUNSPEC
+DIMENS
+  5 5 5 /
+OIL
+WATER
+TABDIMS
+/
+WELLDIMS
+  2  10  3  2 /
+GRID
+DXV
+  5*100 /
+DYV
+  5*100 /
+DZV
+  5*5 /
+TOPS
+  25*2500 /
+PERMX
+  125*500 /
+COPY
+  'PERMX' 'PERMY' /
+  'PERMX' 'PERMZ' /
+/
+MULTIPLY
+  'PERMZ' 0.1 /
+/
+PROPS
+SWOF
+0 0 1 0
+1 1 0 0 /
+SCHEDULE
+WELSPECS
+-- Group 'P' exists from the first report step
+  'P1' 'P' 1 1  2502.5  'OIL' /
+/
+WCONPROD
+  'P1' 'OPEN' 'ORAT'  123.4  4*  50.0 /
+/
+TSTEP
+  10 20 30 40 /
+WELSPECS
+-- Group 'I' does not exist before now (report step 4, zero-based = 3)
+  'I1' 'I' 5 5 2522.5 'WATER' /
+/
+WCONINJE
+  'I1' 'WATER'  'OPEN'  'RATE'  200  1*  450.0 /
+/
+TSTEP
+  50 50 /
+END
+)"
+    };
+
+    const auto deck = ::Opm::Parser{}.parseString(input);
+    const auto es = ::Opm::EclipseState{deck};
+    const auto sched = ::Opm::Schedule{ deck, es };
+
+    BOOST_CHECK_MESSAGE(sched.hasGroup("P"), R"(Group "P" Must Exist)");
+    BOOST_CHECK_MESSAGE(sched.hasGroup("I"), R"(Group "I" Must Exist)");
+
+    BOOST_CHECK_MESSAGE(  sched.hasGroup("P", 3), R"(Group "P" Must Exist at Report Step 3)");
+    BOOST_CHECK_MESSAGE(! sched.hasGroup("I", 3), R"(Group "I" Must NOT Exist at Report Step 3)");
+    BOOST_CHECK_MESSAGE(  sched.hasGroup("I", 4), R"(Group "I" Must Exist at Report Step 4)");
+
+    BOOST_CHECK_MESSAGE(sched.hasGroup("P", 6), R"(Group "P" Must Exist At Last Report Step)");
+    BOOST_CHECK_MESSAGE(sched.hasGroup("I", 6), R"(Group "I" Must Exist At Last Report Step)");
+
+    BOOST_CHECK_MESSAGE(! sched.hasGroup("P", 7), R"(Group "P" Must NOT Exist Immediately After Last Report Step)");
+    BOOST_CHECK_MESSAGE(! sched.hasGroup("I", 7), R"(Group "I" Must NOT Exist Immediately After Last Report Step)");
+
+    BOOST_CHECK_MESSAGE(! sched.hasGroup("P", 1729), R"(Group "P" Must NOT Exist Long After Last Report Step)");
+    BOOST_CHECK_MESSAGE(! sched.hasGroup("I", 1729), R"(Group "I" Must NOT Exist Long After Last Report Step)");
+
+    BOOST_CHECK_THROW(const auto& grp = sched.getGroup2("I", 3), std::invalid_argument);
+}
+
 BOOST_AUTO_TEST_CASE(WellsIterator_Empty_EmptyVectorReturned) {
     EclipseGrid grid(10,10,10);
     auto deck = createDeck();