diff --git a/frontend/src/components/map/MapWorkspace.tsx b/frontend/src/components/map/MapWorkspace.tsx
index a6b956b1..0849d109 100644
--- a/frontend/src/components/map/MapWorkspace.tsx
+++ b/frontend/src/components/map/MapWorkspace.tsx
@@ -50,6 +50,7 @@ import {
   selectionFeatureLimit,
   selectionMetricLabel,
   splitSelectionBbox,
+  temporalDatasetAreaMatch,
 } from './mapWorkspaceUtils'
 
 const DEFAULT_SELECTED_FEATURE_FILENAME = 'selected-feature.geojson'
@@ -584,22 +585,43 @@ function temporalSeriesLabel(items: DatasetCreateResponse[]): string {
   return range ? `${source} (${range})` : source
 }
 
-function listThemeTemporalSeries(datasets: DatasetCreateResponse[], theme: DataTheme): TemporalSeriesGroup[] {
+function listThemeTemporalSeries(
+  datasets: DatasetCreateResponse[],
+  theme: DataTheme,
+  selectedAreaId: string | null,
+): TemporalSeriesGroup[] {
   const groups = new Map<string, DatasetCreateResponse[]>()
   for (const dataset of datasets) {
     if (!datasetMatchesTheme(dataset, theme) || !dataset.temporal_series_key || !dataset.observed_at) {
       continue
     }
+    if (temporalDatasetAreaMatch(dataset, selectedAreaId) === 'other') {
+      continue
+    }
     const items = groups.get(dataset.temporal_series_key) ?? []
     items.push(dataset)
     groups.set(dataset.temporal_series_key, items)
   }
-  return Array.from(groups.entries())
+  const series = Array.from(groups.entries())
     .map(([key, items]) => {
       const ordered = deduplicateTemporalSnapshots(items)
       return { key, label: temporalSeriesLabel(ordered), items: ordered }
     })
     .filter((group) => group.items.length >= 2)
+
+  const sourcesWithExactAreaSeries = new Set(
+    series
+      .filter((group) => group.items.some((item) => temporalDatasetAreaMatch(item, selectedAreaId) === 'exact'))
+      .map((group) => group.items[0]?.source_name)
+      .filter(Boolean),
+  )
+
+  return series
+    .filter((group) => {
+      const sourceName = group.items[0]?.source_name
+      if (!sourceName || !sourcesWithExactAreaSeries.has(sourceName)) return true
+      return group.items.some((item) => temporalDatasetAreaMatch(item, selectedAreaId) === 'exact')
+    })
     .sort((left, right) => {
       if (right.items.length !== left.items.length) {
         return right.items.length - left.items.length
@@ -1442,9 +1464,9 @@ export function MapWorkspace({
   const themeTemporalSeriesMap = useMemo(
     () =>
       Object.fromEntries(
-        DATA_THEMES.map((theme) => [theme.id, listThemeTemporalSeries(availableMapDatasets, theme)]),
+        DATA_THEMES.map((theme) => [theme.id, listThemeTemporalSeries(availableMapDatasets, theme, selectedMapAreaId)]),
       ) as Record<DataThemeId, TemporalSeriesGroup[]>,
-    [availableMapDatasets],
+    [availableMapDatasets, selectedMapAreaId],
   )
   const activeTemporalSeriesGroups = themeTemporalSeriesMap[activeTheme.id]
   const availableEvolutionThemes = DATA_THEMES.filter((theme) =>
diff --git a/frontend/src/components/map/mapWorkspaceUtils.test.ts b/frontend/src/components/map/mapWorkspaceUtils.test.ts
index aef08956..7a0394fb 100644
--- a/frontend/src/components/map/mapWorkspaceUtils.test.ts
+++ b/frontend/src/components/map/mapWorkspaceUtils.test.ts
@@ -16,6 +16,7 @@ import {
   selectionDimensions,
   selectionFeatureLimit,
   splitSelectionBbox,
+  temporalDatasetAreaMatch,
 } from './mapWorkspaceUtils'
 import type { VectorSelectionBBox, VectorSelectionResponse } from '../../types'
 
@@ -98,6 +99,12 @@ describe('map workspace selection guards', () => {
     })).toBe(false)
   })
 
+  it('distinguishes exact, unscoped and foreign temporal work-area snapshots', () => {
+    expect(temporalDatasetAreaMatch({ area_id: 'wallonia-golden' }, 'wallonia-golden')).toBe('exact')
+    expect(temporalDatasetAreaMatch({ area_id: 'other-area' }, 'wallonia-golden')).toBe('other')
+    expect(temporalDatasetAreaMatch({ area_id: null }, 'wallonia-golden')).toBe('unscoped')
+  })
+
   it('classifies local, regional and overview selections before provider calls', () => {
     const bbox = (widthDegrees: number, heightDegrees: number): VectorSelectionBBox => ({
       min_x: 5,
diff --git a/frontend/src/components/map/mapWorkspaceUtils.ts b/frontend/src/components/map/mapWorkspaceUtils.ts
index 5daf91a4..e2174b2a 100644
--- a/frontend/src/components/map/mapWorkspaceUtils.ts
+++ b/frontend/src/components/map/mapWorkspaceUtils.ts
@@ -1,5 +1,6 @@
 import { featureCollectionBounds } from '../../lib/geojsonBounds'
 import type {
+  DatasetCreateResponse,
   ProjectRead,
   VectorSelectionBBox,
   VectorSelectionMetric,
@@ -50,6 +51,16 @@ export function isSelectionBoundedDataset(
     && sourceMetadata['bbox_epsg4326'].length === 4
 }
 
+export type TemporalAreaMatch = 'exact' | 'unscoped' | 'other'
+
+export function temporalDatasetAreaMatch(
+  dataset: Pick<DatasetCreateResponse, 'area_id'>,
+  selectedAreaId: string | null,
+): TemporalAreaMatch {
+  if (!selectedAreaId || !dataset.area_id) return 'unscoped'
+  return dataset.area_id === selectedAreaId ? 'exact' : 'other'
+}
+
 export function operationalScopeProjectLabel(project: ProjectRead): string {
   if (project.name === MOL_PROJECT_NAME) {
     return 'Mol'