diff --git a/.changes/unreleased/Features-20240627-162953.yaml b/.changes/unreleased/Features-20240627-162953.yaml
new file mode 100644
index 00000000000..8e385aa6186
--- /dev/null
+++ b/.changes/unreleased/Features-20240627-162953.yaml
@@ -0,0 +1,6 @@
+kind: Features
+body: Add time_granularity to metric spec.
+time: 2024-06-27T16:29:53.500917-07:00
+custom:
+  Author: courtneyholcomb
+  Issue: "10376"
diff --git a/core/dbt/artifacts/resources/v1/metric.py b/core/dbt/artifacts/resources/v1/metric.py
index 0679fd3ba82..0c6da764220 100644
--- a/core/dbt/artifacts/resources/v1/metric.py
+++ b/core/dbt/artifacts/resources/v1/metric.py
@@ -121,6 +121,7 @@ class Metric(GraphResource):
     type_params: MetricTypeParams
     filter: Optional[WhereFilterIntersection] = None
     metadata: Optional[SourceFileMetadata] = None
+    time_granularity: Optional[TimeGranularity] = None
     resource_type: Literal[NodeType.Metric]
     meta: Dict[str, Any] = field(default_factory=dict, metadata=MergeBehavior.Update.meta())
     tags: List[str] = field(default_factory=list)
diff --git a/core/dbt/contracts/graph/unparsed.py b/core/dbt/contracts/graph/unparsed.py
index fd885645313..a64223df3b6 100644
--- a/core/dbt/contracts/graph/unparsed.py
+++ b/core/dbt/contracts/graph/unparsed.py
@@ -563,6 +563,7 @@ class UnparsedMetric(dbtClassMixin):
     description: str = ""
     # Note: `Union` must be the outermost part of the type annotation for serialization to work properly.
     filter: Union[str, List[str], None] = None
+    time_granularity: Optional[str] = None
     # metadata: Optional[Unparsedetadata] = None # TODO
     meta: Dict[str, Any] = field(default_factory=dict)
     tags: List[str] = field(default_factory=list)
diff --git a/core/dbt/parser/schema_yaml_readers.py b/core/dbt/parser/schema_yaml_readers.py
index 86ac10d7545..b4ae3e213b7 100644
--- a/core/dbt/parser/schema_yaml_readers.py
+++ b/core/dbt/parser/schema_yaml_readers.py
@@ -435,6 +435,9 @@ def parse_metric(self, unparsed: UnparsedMetric, generated: bool = False) -> Non
             label=unparsed.label,
             type=MetricType(unparsed.type),
             type_params=self._get_metric_type_params(unparsed),
+            time_granularity=(
+                TimeGranularity(unparsed.time_granularity) if unparsed.time_granularity else None
+            ),
             filter=parse_where_filter(unparsed.filter),
             meta=unparsed.meta,
             tags=unparsed.tags,
diff --git a/core/setup.py b/core/setup.py
index 42b60836931..1491204ae3c 100644
--- a/core/setup.py
+++ b/core/setup.py
@@ -69,7 +69,7 @@
         # Accept patches but avoid automatically updating past a set minor version range.
         "dbt-extractor>=0.5.0,<=0.6",
         "minimal-snowplow-tracker>=0.0.2,<0.1",
-        "dbt-semantic-interfaces>=0.6.1,<0.7",
+        "dbt-semantic-interfaces>=0.6.8,<0.7",
         # Minor versions for these are expected to be backwards-compatible
         "dbt-common>=1.3.0,<2.0",
         "dbt-adapters>=1.1.1,<2.0",
diff --git a/schemas/dbt/manifest/v12.json b/schemas/dbt/manifest/v12.json
index 6e125cc0c98..0ec6daae1f1 100644
--- a/schemas/dbt/manifest/v12.json
+++ b/schemas/dbt/manifest/v12.json
@@ -9044,6 +9044,29 @@
             ],
             "default": null
           },
+          "time_granularity": {
+            "anyOf": [
+              {
+                "enum": [
+                  "nanosecond",
+                  "microsecond",
+                  "millisecond",
+                  "second",
+                  "minute",
+                  "hour",
+                  "day",
+                  "week",
+                  "month",
+                  "quarter",
+                  "year"
+                ]
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "default": null
+          },
           "meta": {
             "type": "object",
             "propertyNames": {
@@ -18020,6 +18043,29 @@
                       ],
                       "default": null
                     },
+                    "time_granularity": {
+                      "anyOf": [
+                        {
+                          "enum": [
+                            "nanosecond",
+                            "microsecond",
+                            "millisecond",
+                            "second",
+                            "minute",
+                            "hour",
+                            "day",
+                            "week",
+                            "month",
+                            "quarter",
+                            "year"
+                          ]
+                        },
+                        {
+                          "type": "null"
+                        }
+                      ],
+                      "default": null
+                    },
                     "meta": {
                       "type": "object",
                       "propertyNames": {
diff --git a/tests/functional/metrics/fixtures.py b/tests/functional/metrics/fixtures.py
index 39d11fb0a95..5614fab8c63 100644
--- a/tests/functional/metrics/fixtures.py
+++ b/tests/functional/metrics/fixtures.py
@@ -113,6 +113,7 @@
     type: simple
     type_params:
       measure: people
+    time_granularity: month
     config:
       meta:
         my_meta_config: 'config'
diff --git a/tests/functional/metrics/test_metrics.py b/tests/functional/metrics/test_metrics.py
index 9241ea8ceaa..3f8fba2a19c 100644
--- a/tests/functional/metrics/test_metrics.py
+++ b/tests/functional/metrics/test_metrics.py
@@ -83,6 +83,11 @@ def test_simple_metric(
             )
             == 2
         )
+        assert (
+            manifest.metrics["metric.test.number_of_people"].time_granularity
+            == TimeGranularity.MONTH
+        )
+        assert manifest.metrics["metric.test.collective_tenure"].time_granularity is None
 
 
 class TestInvalidRefMetrics: