diff --git a/Gemfile b/Gemfile
index 1d6c1bc..b75cd2b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -60,6 +60,8 @@ gem "aws-sdk-s3", "~> 1.177"
 gem "sidekiq", "~> 7.3"
 gem "sidekiq-scheduler", "~> 5.0"
 
+gem "image_processing", "~> 1.13"
+
 group :development, :test do
   # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
   gem "debug", platforms: %i[ mri windows ], require: "debug/prelude"
diff --git a/Gemfile.lock b/Gemfile.lock
index 30d3377..9ff2d31 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -164,6 +164,7 @@ GEM
       multipart-post (~> 2.0)
     faraday-net_http (3.4.0)
       net-http (>= 0.5.0)
+    ffi (1.17.1-arm64-darwin)
     formtastic (5.0.0)
       actionpack (>= 6.0.0)
     formtastic_i18n (0.7.0)
@@ -183,6 +184,9 @@ GEM
       multi_xml (>= 0.5.2)
     i18n (1.14.6)
       concurrent-ruby (~> 1.0)
+    image_processing (1.13.0)
+      mini_magick (>= 4.9.5, < 5)
+      ruby-vips (>= 2.0.17, < 3)
     inherited_resources (1.14.0)
       actionpack (>= 6.0)
       has_scope (>= 0.6)
@@ -240,6 +244,7 @@ GEM
     matrix (0.4.2)
     meta-tags (2.22.1)
       actionpack (>= 6.0.0, < 8.1)
+    mini_magick (4.13.2)
     mini_mime (1.1.5)
     minitest (5.25.4)
     msgpack (1.7.5)
@@ -386,6 +391,9 @@ GEM
       faraday (>= 1)
       faraday-multipart (>= 1)
     ruby-progressbar (1.13.0)
+    ruby-vips (2.2.2)
+      ffi (~> 1.12)
+      logger
     ruby2_keywords (0.0.5)
     rubyzip (2.4.1)
     rufus-scheduler (3.9.2)
@@ -502,6 +510,7 @@ DEPENDENCIES
   down (~> 5.4)
   friendly_id (~> 5.5)
   httparty (~> 0.22.0)
+  image_processing (~> 1.13)
   jbuilder
   jsbundling-rails
   kamal
diff --git a/app/assets/images/today_ai_weather_copyright_watermark1.png b/app/assets/images/today_ai_weather_copyright_watermark1.png
new file mode 100644
index 0000000..47c2ce9
Binary files /dev/null and b/app/assets/images/today_ai_weather_copyright_watermark1.png differ
diff --git a/app/models/weather_art.rb b/app/models/weather_art.rb
index e45c2b5..078a58e 100644
--- a/app/models/weather_art.rb
+++ b/app/models/weather_art.rb
@@ -4,6 +4,7 @@ class WeatherArt < ApplicationRecord
 
   belongs_to :city
   has_one_attached :image
+  has_one_attached :image_with_watermark
 
   has_many :visits, class_name: "Ahoy::Visit", foreign_key: :weather_art_id
   has_many :events, class_name: "Ahoy::Event", foreign_key: :weather_art_id
diff --git a/app/workers/add_watermark_to_weatherart_worker.rb b/app/workers/add_watermark_to_weatherart_worker.rb
new file mode 100644
index 0000000..6f27610
--- /dev/null
+++ b/app/workers/add_watermark_to_weatherart_worker.rb
@@ -0,0 +1,53 @@
+class AddWatermarkToWeatherArtWorker
+  include Sidekiq::Worker
+
+  def perform(weather_art_id)
+    @weather_art = WeatherArt.find_by(id: weather_art_id)
+    return unless @weather_art
+
+    add_watermark
+  rescue StandardError => e
+    Rails.logger.error "Error adding watermark to WeatherArt #{weather_art_id}: #{e.message}"
+    Rails.logger.error e.backtrace.join("\n")
+  end
+
+  private
+
+  attr_reader :weather_art
+
+  def add_watermark
+    return if weather_art.image_with_watermark.attached?
+
+    watermark_path = Rails.root.join("app/assets/images/today_ai_weather_copyright_watermark1.png")
+    return unless File.exist?(watermark_path)
+
+    image_tempfile = nil
+    watermark_tempfile = nil
+    begin
+      image_tempfile = weather_art.image.download
+      return unless image_dimensions_are_sufficient?(image_tempfile.path)
+
+      image = ImageProcessing::Vips.source(image_tempfile.path)
+      watermark = ImageProcessing::Vips.source(watermark_path)
+      watermarked_image = image.composite(watermark, "overlay")
+      watermark_tempfile = Tempfile.new([ "watermarked_image", ".png" ])
+      watermarked_image.write_to_file(watermark_tempfile.path)
+      weather_art.image_with_watermark.attach(
+        io: File.open(watermark_tempfile.path),
+        filename: "#{generate_filename("watermarked")}",
+        content_type: "image/png"
+      )
+    ensure
+      watermark_tempfile.unlink if watermark_tempfile
+    end
+  end
+
+  def image_dimensions_are_sufficient?(image_path)
+    dimensions = ImageProcessing::Vips.source(image_path).sizes
+    dimensions.width >= 200 && dimensions.height >= 200
+  end
+
+  def generate_filename(prefix)
+    "#{prefix}_#{weather_art.image.filename.base}"
+  end
+end