# ERA5 ocean grid mismatch

**URL:** <https://forum.ecmwf.int/t/era5-ocean-grid-mismatch/15055>\
**Category:** C3S - Datasets and Usage\
**Tags:** era5\
**Created:** [8 June 2026 08:11 UTC](https://forum.ecmwf.int/t/era5-ocean-grid-mismatch/15055 "2026-06-08T08:11:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Steven\_Yirenkyi](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/s/9de053/32.png) [@Steven\_Yirenkyi](https://forum.ecmwf.int/u/Steven_Yirenkyi)\
**Post date:** [8 June 2026 08:11 UTC](https://forum.ecmwf.int/t/era5-ocean-grid-mismatch/15055/1 "2026-06-08T08:11:41Z")

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Last year, between May and July, I downloaded 30 years of ocean data using the cdsapi for my study area. The longitude values were [0.2, 0.7, 1.2].

This year, using the same script and bounding box to download the same ocean data, the longitude values seem to have shifted: [0.0, 0.5, 1.0].

Would it be okay to simply replace the old coordinates with the new ones?

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**Author:** ![Michela](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/m/898d66/32.png) [@Michela](https://forum.ecmwf.int/u/Michela)\
**Post date:** [8 June 2026 12:02 UTC](https://forum.ecmwf.int/t/era5-ocean-grid-mismatch/15055/2 "2026-06-08T12:02:43Z")

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Hi,  
please refer to **[Software upgrade for data extraction of a geographical area from selected ERA5 and Seasonal forecast datasets](https://forum.ecmwf.int/t/software-upgrade-for-data-extraction-of-a-geographical-area-from-selected-era5-and-seasonal-forecast-datasets/14583)**

Thanks

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<div class="post-metadata">

**Author:** ![Steven\_Yirenkyi](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/s/9de053/32.png) [@Steven\_Yirenkyi](https://forum.ecmwf.int/u/Steven_Yirenkyi)\
**Post date:** [8 June 2026 14:12 UTC](https://forum.ecmwf.int/t/era5-ocean-grid-mismatch/15055/3 "2026-06-08T14:12:16Z")

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Thanks. Guess I have to redownload the entire data again.