diff --git a/esmvaltool/cmorizers/data/cmor_config/OSI-450-nh.yml b/esmvaltool/cmorizers/data/cmor_config/OSI-450-nh.yml
index 6a115cf20e..db5ffb2eb8 100644
--- a/esmvaltool/cmorizers/data/cmor_config/OSI-450-nh.yml
+++ b/esmvaltool/cmorizers/data/cmor_config/OSI-450-nh.yml
@@ -2,7 +2,7 @@
 # Common global attributes for Cmorizer output
 attributes:
   dataset_id: OSI-450-nh
-  version: 'v2'
+  version: 'v3'
   tier: 2
   modeling_realm: reanaly
   project_id: OBS
@@ -19,6 +19,6 @@ variables:
 
 custom:
   create_areacello: true
-  grid_cell_size: 25000.
+  grid_cell_size: 0.625e9
   # Minimum number of days with data to generate daily files
   min_days: 50
diff --git a/esmvaltool/cmorizers/data/cmor_config/OSI-450-sh.yml b/esmvaltool/cmorizers/data/cmor_config/OSI-450-sh.yml
index 47c22c6d18..25c53a3f6b 100644
--- a/esmvaltool/cmorizers/data/cmor_config/OSI-450-sh.yml
+++ b/esmvaltool/cmorizers/data/cmor_config/OSI-450-sh.yml
@@ -2,7 +2,7 @@
 # Common global attributes for Cmorizer output
 attributes:
   dataset_id: OSI-450-sh
-  version: 'v2'
+  version: 'v3'
   tier: 2
   modeling_realm: reanaly
   project_id: OBS
@@ -19,6 +19,6 @@ variables:
 
 custom:
   create_areacello: true
-  grid_cell_size: 25000.
+  grid_cell_size: 0.625e9
   # Minimum number of days with data to generate daily files
   min_days: 50
diff --git a/esmvaltool/cmorizers/data/datasets.yml b/esmvaltool/cmorizers/data/datasets.yml
index 15991a8c33..86e0bfbc6b 100644
--- a/esmvaltool/cmorizers/data/datasets.yml
+++ b/esmvaltool/cmorizers/data/datasets.yml
@@ -1178,10 +1178,10 @@ datasets:
   OSI-450-nh:
     tier: 2
     source: http://osisaf.met.no/p/ice/
-    last_access: 2019-05-02
+    last_access: 2025-03-14
     info: |
       Download the desired years from the following ftp:
-        ftp://osisaf.met.no/reprocessed/ice/conc/v2p0
+        ftp://osisaf.met.no/reprocessed/ice/conc/v3p0
       Please, keep folder structure.
 
       If you want to use only the nh data download only the nh files,
@@ -1194,10 +1194,10 @@ datasets:
   OSI-450-sh:
     tier: 2
     source: http://osisaf.met.no/p/ice/
-    last_access: 2019-05-02
+    last_access: 2025-03-14
     info: |
       Download the desired years from the following ftp:
-        ftp://osisaf.met.no/reprocessed/ice/conc/v2p0
+        ftp://osisaf.met.no/reprocessed/ice/conc/v3p0
       Please, keep folder structure.
 
       If you want to use only the nh data download only the nh files,
diff --git a/esmvaltool/cmorizers/data/downloaders/datasets/osi_450_nh.py b/esmvaltool/cmorizers/data/downloaders/datasets/osi_450_nh.py
index bea5b20dd3..86a4cfbf58 100644
--- a/esmvaltool/cmorizers/data/downloaders/datasets/osi_450_nh.py
+++ b/esmvaltool/cmorizers/data/downloaders/datasets/osi_450_nh.py
@@ -30,7 +30,7 @@ def download_dataset(
     if start_date is None:
         start_date = datetime(1979, 1, 1)
     if end_date is None:
-        end_date = datetime(2015, 12, 1)
+        end_date = datetime(2020, 12, 1)
     downloader = FTPDownloader(
         config=config,
         server="osisaf.met.no",
@@ -42,7 +42,7 @@ def download_dataset(
 
     loop_date = start_date
 
-    downloader.set_cwd("/reprocessed/ice/conc/v2p0")
+    downloader.set_cwd("/reprocessed/ice/conc/v3p0")
 
     while loop_date <= end_date:
         year = loop_date.year
diff --git a/esmvaltool/cmorizers/data/downloaders/datasets/osi_450_sh.py b/esmvaltool/cmorizers/data/downloaders/datasets/osi_450_sh.py
index 0dc529bf9f..461f019c7c 100644
--- a/esmvaltool/cmorizers/data/downloaders/datasets/osi_450_sh.py
+++ b/esmvaltool/cmorizers/data/downloaders/datasets/osi_450_sh.py
@@ -30,7 +30,7 @@ def download_dataset(
     if start_date is None:
         start_date = datetime(1979, 1, 1)
     if end_date is None:
-        end_date = datetime(2015, 12, 1)
+        end_date = datetime(2020, 12, 1)
     downloader = FTPDownloader(
         config=config,
         server="osisaf.met.no",
@@ -42,7 +42,7 @@ def download_dataset(
 
     loop_date = start_date
 
-    downloader.set_cwd("/reprocessed/ice/conc/v2p0")
+    downloader.set_cwd("/reprocessed/ice/conc/v3p0")
 
     while loop_date <= end_date:
         year = loop_date.year
diff --git a/esmvaltool/cmorizers/data/formatters/datasets/osi_450_nh.py b/esmvaltool/cmorizers/data/formatters/datasets/osi_450_nh.py
index 1cc0193f54..ca0d50598d 100644
--- a/esmvaltool/cmorizers/data/formatters/datasets/osi_450_nh.py
+++ b/esmvaltool/cmorizers/data/formatters/datasets/osi_450_nh.py
@@ -7,7 +7,7 @@
    http://osisaf.met.no/p/ice/
 
 Last access
-   20190502
+   20250314
 
 Download and processing instructions
     Download the desired years from the following ftp:
diff --git a/esmvaltool/cmorizers/data/formatters/datasets/osi_450_sh.py b/esmvaltool/cmorizers/data/formatters/datasets/osi_450_sh.py
index 51998abadb..9662b0e40d 100644
--- a/esmvaltool/cmorizers/data/formatters/datasets/osi_450_sh.py
+++ b/esmvaltool/cmorizers/data/formatters/datasets/osi_450_sh.py
@@ -7,7 +7,7 @@
    http://osisaf.met.no/p/ice/
 
 Last access
-   20190502
+   20250314
 
 Download and processing instructions
     Download the desired years from the following ftp:
diff --git a/esmvaltool/recipes/examples/recipe_check_obs.yml b/esmvaltool/recipes/examples/recipe_check_obs.yml
index 24da949a68..cd75f8dfb5 100644
--- a/esmvaltool/recipes/examples/recipe_check_obs.yml
+++ b/esmvaltool/recipes/examples/recipe_check_obs.yml
@@ -856,9 +856,9 @@ diagnostics:
         mip: fx
     additional_datasets:
       - {dataset: OSI-450-nh, project: OBS, tier: 2,
-         type: reanaly, version: v2, start_year: 1979, end_year: 2015}
+         type: reanaly, version: v3, start_year: 1979, end_year: 2020}
       - {dataset: OSI-450-sh, project: OBS, tier: 2,
-         type: reanaly, version: v2, start_year: 1979, end_year: 2015}
+         type: reanaly, version: v3, start_year: 1979, end_year: 2020}
     scripts: null