Issues

• repr() raises OverflowError for timedelta64 arrays outside the nanosecond range

  pydata/xarray#11630 · Filter by author aniruddhaadak80 opened on Sep 28, 2026

• Custom index silently wins over a same-named plain coordinate with a different value

  needs triage
  pydata/xarray#11607 · Filter by author matthiasschabel opened on Sep 25, 2026

• potential netcdf4 backend bug involving coordinate collapse with Dataset.isel

  bugupstream issue
  pydata/xarray#11601 · Filter by author rorlija1 opened on Sep 21, 2026
  1

• RangeIndex with datetime64 bounds cannot be printed (Unknown format code 'g'`)

  bug
  pydata/xarray#11598 · Filter by author d-chambers opened on Sep 21, 2026
  1

• xarray - dask map_blocks duplicates coordinate tasks across calls on the same object

  bugneeds triage
  pydata/xarray#11588 · Filter by author benritchie opened on Sep 14, 2026
  2

• Fix accessors docs build

  bugneeds triage
  pydata/xarray#11584 · Filter by author mwyau opened on Sep 12, 2026

• CachingFileManager opens one file handle per open_dataset() call — could identical managers share a FILE_CACHE entry?

  needs triage
  pydata/xarray#11581 · Filter by author djhoese opened on Sep 11, 2026
  1

• Weighted reductions drop orphaned dimensions

  bugneeds triage
  pydata/xarray#11560 · Filter by author charles-turner-1 opened on Sep 4, 2026
  4

• max, min and datetime mean/median raise on an empty dimension

  pydata/xarray#11554 · Filter by author chiruu12 opened on Sep 1, 2026
  1

• quantile fails on an empty dimension where other reductions return NaN

  pydata/xarray#11549 · Filter by author chiruu12 opened on Aug 29, 2026
  2

• Dask graph rewriting/ expression optimisation

  enhancement
  pydata/xarray#11542 · Filter by author charles-turner-1 opened on Aug 24, 2026
  4

• get_chunked_array_type rejects two array classes handled by the same chunk manager

  bugneeds triage
  pydata/xarray#11539 · Filter by author claydugo opened on Aug 21, 2026
  1

• xarray change subset of values of Dataset variable obtained from pandas DataFrame with pandas v3

  needs triage
  pydata/xarray#11527 · Filter by author Lenticular opened on Aug 15, 2026

• DataTree constructor error message says dict even though dict is not accepted

  bugneeds triage
  pydata/xarray#11514 · Filter by author mgunyho opened on Aug 12, 2026

• In open_zarr, decode_timedelta does not behave as documented

  bugtopic-zarr
  pydata/xarray#11507 · Filter by author theo-xirouchaki opened on Aug 11, 2026
  7

• Construction of arrays with object dtype very slow when Pandas future.infer_string is enabled

  bugtopic-performance
  pydata/xarray#11470 · Filter by author y4n9squared opened on Jul 23, 2026
  5

• Testing secting is user guide renders incorrectly

  bugtopic-documentation
  pydata/xarray#11465 · Filter by author eni-awowale opened on Jul 21, 2026
  9

• Unable to roundtrip sharded zarr

  bugneeds triage
  pydata/xarray#11460 · Filter by author taus opened on Jul 20, 2026

• Documentation build failing in Windows

  bugtopic-documentation
  pydata/xarray#11458 · Filter by author rwkozar opened on Jul 19, 2026
  10

• unstack is slow for regular data

  bugtopic-performance
  pydata/xarray#11455 · Filter by author takluyver opened on Jul 17, 2026
  4

• DataTree.children repr is inconsistent with DataTree.parent (rich HTML vs. flat nested text)

  pydata/xarray#11453 · Filter by author ericmjl opened on Jul 14, 2026
  2

• REPR: Allow accessor to be included in the repr

  enhancement
  pydata/xarray#11451 · Filter by author ianhi opened on Jul 14, 2026
  1

• exception to indexed-coordinate only inheritance for coordinates encoding

  enhancement
  pydata/xarray#11441 · Filter by author itcarroll opened on Jul 7, 2026
  1

• resolving the nightly version of numcodecs fails

  pydata/xarray#11437 · Filter by author keewis opened on Jul 5, 2026
  1

• a proposal to simplify encoding for zarr data

  topic-zarr
  pydata/xarray#11431 · Filter by author d-v-b opened on Jul 2, 2026
  8