Thalassa

Mediterranean Sea forecast

Free · Designed for iPad. Not verified for macOS.

Free, ad-free Mediterranean marine weather forecast: animated currents, waves, wind and an AI Sea Advisor. Trusted Copernicus, ECMWF & EMODnet data. Thalassa turns professional ocean and weather models into a simple map and a friendly advisor for anyone who spends time on the water. REAL-TIME MARINE MAP See the Mediterranean come alive with animated sea-surface currents, wave height, wind, rain, cloud cover, pressure, temperature and water quality. Scrub the timeline — hourly near now, out to +10 days — to watch conditions evolve, tap any point for a detailed meteogram, and switch between layers with a single tap. • Sea-surface currents (animated streamlines) • Wave height, period and direction • Wind, air temperature and mean sea-level pressure • Rain and cloud cover, with sky symbols • Sea temperature and water transparency • Satellite and in-situ observations • Adaptive timeline: hourly near now, out to +10 days SEA ADVISOR — YOUR AI GUIDE Not sure where to go? Just ask. Tell Sea Advisor what you want to do — swim, kayak, surf, snorkel or sail — and it checks the live marine forecast to recommend the best spots and times along the coast, with clear safety notes (waves, wind, UV). TRUSTED DATA Forecasts come from Copernicus Marine (CMEMS), ECMWF and EMODnet — the same operational models used by scientists — delivered by CMCC, the Euro-Mediterranean Center on Climate Change. Thalassa is free, has no ads, and does not track you.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

• Sharper maps: high-resolution coastline at every zoom level. OpenStreetMap (ODbL) attribution for coastline data. • Dynamic colour palette: when you open a layer the colours auto-fit the data in view, then stay stable as you change date or zoom. Re-fit on demand anytime. • Unified, more readable palette for waves and wind. • Optimization in maps: Sea Level (SSH) and Air Temperature, with dedicated colour scales. • EMODnet bathymetry as a dedicated depth map. • Better display of hourly forecasts in the meteograms. • Various fixes and performance improvements.

Version 1.3

The developer, CMCC Foundation, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location
    • Other Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
CMCC Foundation
Size
5.7 MB
Category
Weather
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • iPad
    Requires iPadOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and Italian
Age Rating
4+
Copyright
© 2026 CMCC — Euro-Mediterranean Center on Climate Change
  • Privacy Policy

    • More by CMCC Foundation

    You Might Also Like