diff --git a/.github/workflows/benchmarks.yml b/.github/workflows/benchmarks.yml
index 16f87c22822..71df1f62262 100644
--- a/.github/workflows/benchmarks.yml
+++ b/.github/workflows/benchmarks.yml
@@ -54,7 +54,7 @@ jobs:
           cache-environment-key: micromamba-environment-${{ steps.date.outputs.date }}
           create-args: >-
             gmt=6.7.0
-            python=3.14
+            python=3.15
             numpy
             pandas
             xarray
diff --git a/.github/workflows/cache_data.yaml b/.github/workflows/cache_data.yaml
index b564e1b87e7..b6b2c73b67a 100644
--- a/.github/workflows/cache_data.yaml
+++ b/.github/workflows/cache_data.yaml
@@ -52,7 +52,7 @@ jobs:
         with:
           environment-name: pygmt
           create-args: >-
-            python=3.14
+            python=3.15
             gmt=6.7.0
             numpy
             pandas
diff --git a/.github/workflows/ci_docs.yml b/.github/workflows/ci_docs.yml
index acad1ec0079..691cb2866fb 100644
--- a/.github/workflows/ci_docs.yml
+++ b/.github/workflows/ci_docs.yml
@@ -92,7 +92,7 @@ jobs:
           # environment cache is persistent for one week.
           cache-environment-key: micromamba-environment-${{ steps.date.outputs.date }}
           create-args: >-
-            python=3.14
+            python=3.15
             gmt=6.7.0
             ghostscript=10.08.0
             numpy
diff --git a/.github/workflows/ci_doctests.yaml b/.github/workflows/ci_doctests.yaml
index f384ea0d341..538d884930e 100644
--- a/.github/workflows/ci_doctests.yaml
+++ b/.github/workflows/ci_doctests.yaml
@@ -47,7 +47,7 @@ jobs:
         with:
           environment-name: pygmt
           create-args: >-
-            python=3.14
+            python=3.15
             gmt=6.7.0
             numpy
             pandas
diff --git a/.github/workflows/ci_tests.yaml b/.github/workflows/ci_tests.yaml
index 2854d928d3e..b459aa85ff3 100644
--- a/.github/workflows/ci_tests.yaml
+++ b/.github/workflows/ci_tests.yaml
@@ -61,7 +61,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.12', '3.14']
+        python-version: ['3.12', '3.15']
         os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-latest]
         # Is it a draft Pull Request (true or false)?
         isDraft:
@@ -81,8 +81,8 @@ jobs:
             pandas-version: '=2.3'
             xarray-version: '=2024.10'
             optional-packages: ' contextily geopandas ipython pyarrow-core rioxarray netCDF4 sphinx-gallery'
-          # Python 3.14 + core packages (latest versions) + optional packages
-          - python-version: '3.14'
+          # Python 3.15 + core packages (latest versions) + optional packages
+          - python-version: '3.15'
             numpy-version: '2.5'
             pandas-version: ''
             xarray-version: ''
diff --git a/.github/workflows/ci_tests_dev.yaml b/.github/workflows/ci_tests_dev.yaml
index 8dd2d631c39..f87c233214a 100644
--- a/.github/workflows/ci_tests_dev.yaml
+++ b/.github/workflows/ci_tests_dev.yaml
@@ -70,7 +70,7 @@ jobs:
           # environment cache is persistent for one week.
           cache-environment-key: micromamba-environment-${{ steps.date.outputs.date }}
           create-args: >-
-            python=3.14
+            python=3.15
             cmake
             make
             ninja
diff --git a/.github/workflows/format-command.yml b/.github/workflows/format-command.yml
index 760e71fd7ea..d75c4a1a142 100644
--- a/.github/workflows/format-command.yml
+++ b/.github/workflows/format-command.yml
@@ -36,7 +36,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
-          python-version: '3.14'
+          python-version: '3.15'
 
       - name: Install formatting tools
         run: |
diff --git a/.github/workflows/publish-to-pypi.yml b/.github/workflows/publish-to-pypi.yml
index 4a0f7c31150..5808b5a4571 100644
--- a/.github/workflows/publish-to-pypi.yml
+++ b/.github/workflows/publish-to-pypi.yml
@@ -50,7 +50,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
       with:
-        python-version: '3.14'
+        python-version: '3.15'
 
     - name: Install dependencies
       run: python -m pip install build
diff --git a/.github/workflows/style_checks.yaml b/.github/workflows/style_checks.yaml
index af5226bac19..946d66cb1fd 100644
--- a/.github/workflows/style_checks.yaml
+++ b/.github/workflows/style_checks.yaml
@@ -33,7 +33,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
-          python-version: '3.14'
+          python-version: '3.15'
 
       - name: Install packages
         run: |
diff --git a/.github/workflows/type_checks.yml b/.github/workflows/type_checks.yml
index b1c3ac14a64..4257a04d2d0 100644
--- a/.github/workflows/type_checks.yml
+++ b/.github/workflows/type_checks.yml
@@ -43,7 +43,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
-          python-version: '3.14'
+          python-version: '3.15'
 
       - name: Install packages
         run: |
diff --git a/ci/requirements/docs.yml b/ci/requirements/docs.yml
index c4aa6108f4d..69a2f512d69 100644
--- a/ci/requirements/docs.yml
+++ b/ci/requirements/docs.yml
@@ -4,7 +4,7 @@ channels:
     - nodefaults
 dependencies:
     # Required dependencies
-    - python=3.14
+    - python=3.15
     - gmt=6.7.0
     - ghostscript=10.08.0
     - numpy
diff --git a/doc/install.md b/doc/install.md
index 8061fff7d01..82f96ec5cf7 100644
--- a/doc/install.md
+++ b/doc/install.md
@@ -99,7 +99,7 @@ Now we can create a new virtual environment with Python and all our dependencies
 installed (we'll call it `pygmt` but feel free to change it to whatever you want):
 
 ```
-conda create --name pygmt python=3.14 numpy pandas xarray packaging gmt
+conda create --name pygmt python=3.15 numpy pandas xarray packaging gmt
 ```
 
 Activate the environment by running the following (**do not forget this step!**):
diff --git a/pyproject.toml b/pyproject.toml
index 23fe013a24e..a2854095dcb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,6 +33,7 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",
+    "Programming Language :: Python :: 3.15",
 ]
 dependencies = [
     "numpy>=2.2",