Best Open-Source Weather Apps 2026: 6 Options Compared
Best open-source Weather Apps compared: Breezy Weather, Geometric Weather, WeatherMaster, Forecastie and 2 more, with licenses, platforms and prices from official pages checked October 24, 2026.
•3 min read•Learning & Everyday Apps
Quick comparison
| Tool | Price | Platforms | Best for | Tested |
|---|---|---|---|---|
| Breezy Weather | Free (Free open-source weather app with more than 50 sources) | Android | Most Android users | Docs only |
| Geometric Weather | Free (Free open-source weather app) | Android | A graphical Android forecast | Docs only |
| WeatherMaster | Free (Free open-source weather app) | Android | Trying a newer Android app | Docs only |
| Forecastie | Free (Free open-source weather app using the OpenWeatherMap API) | Android | Simple forecasts | Docs only |
| GNOME Weather | Free (Free open-source weather app for the GNOME desktop) | Linux | Linux desktop | Docs only |
| Open-Meteo | Free (Open-source weather API and forecast site; the license is AGPL-3.0 and any commercial API terms were not checked) | Web browser, Self-hosted API | Developers and data users | Docs only |
Independent comparison. Paid placements are labelled separately; editorial links earn no affiliate commissions. Learn more.
Good fit if
- You want the widest choice of data sources (Breezy Weather is the pick)
- You use a GNOME desktop (GNOME Weather is the pick)
- You build your own dashboard (Open-Meteo is the pick)
- You have an OpenWeatherMap key (Forecastie is the pick)
Not ideal if
- You cannot host, patch and back up a server yourself and want a vendor to run it
Open-source weather apps are few, and most target Android or the Linux desktop. Breezy Weather (LGPL-3.0) is the most active: it supports more than 50 data sources, so you can switch providers if one is poor in your country. Geometric Weather (LGPL-3.0) and WeatherMaster (GPL-3.0) are alternatives with different layouts, and Forecastie (GPL-3.0) is a no-frills Android forecast that needs your own OpenWeatherMap API key. GNOME Weather (GPL-2.0) suits the Linux desktop. Open-Meteo (AGPL-3.0) is different: an open weather API and forecast site that many apps use for data, and you can self-host it, although you should check its terms before commercial use. The weak point is data rather than code. An open-source front end still relies on some forecast provider, and radar maps, severe-weather alerts and hourly rain predictions vary by region. If you depend on official warnings, install the national weather service app beside your preferred open-source one. Check the repository activity before installing, since small hobby apps can stall and stop receiving fixes.
Breezy Weather
LGPL-3.0 Android app with more than 50 sources and clear charts, the most flexible open choice for different countries.
Price: Free (Free open-source weather app with more than 50 sources) (Breezy Weather pricing, checked 2026-10-24).
Platforms and license: Android. LGPL-3.0 (open source) (license source).
Project activity: 11.8k GitHub stars · latest release v6.2.2 (Aug 23, 2026) · last commit Oct 25, 2026
Best for: Most Android users.
Worth knowing: License verified from the repository LICENSE/COPYING file on GitHub on 2026-10-24; platforms listed from project knowledge, not re-verified on the project site.
Geometric Weather
LGPL-3.0 Android app with a visual layout; check recent releases to confirm it is still maintained.
Price: Free (Free open-source weather app) (Geometric Weather pricing, checked 2026-10-24).
Platforms and license: Android. LGPL-3.0 (open source) (license source).
Project activity: 2.5k GitHub stars · latest release 3.013 (Apr 15, 2021) · last commit Aug 31, 2026
Best for: A graphical Android forecast.
Worth knowing: License verified from the repository LICENSE/COPYING file on GitHub on 2026-10-24; platforms listed from project knowledge, not re-verified on the project site.
WeatherMaster
GPL-3.0 Android weather app from a small project; read its release history before relying on it.
Price: Free (Free open-source weather app) (WeatherMaster pricing, checked 2026-10-24).
Platforms and license: Android. GPL-3.0 (open source) (license source).
Project activity: 3.2k GitHub stars · latest release v3.11.0 (Oct 17, 2026) · last commit Oct 23, 2026
Best for: Trying a newer Android app.
Worth knowing: License verified from the repository LICENSE/COPYING file on GitHub on 2026-10-24; platforms listed from project knowledge, not re-verified on the project site.
Forecastie
GPL-3.0 Android app that needs your own OpenWeatherMap API key; check its plan limits. It is a simple forecast viewer, and you supply your own key rather than relying on a bundled data service.
Price: Free (Free open-source weather app using the OpenWeatherMap API) (Forecastie pricing, checked 2026-10-24).
Platforms and license: Android. GPL-3.0 (open source) (license source).
Project activity: 902 GitHub stars · latest release v1.23 (Dec 7, 2025) · last commit Dec 7, 2025
Best for: Simple forecasts.
GNOME Weather
GPL-2.0 weather app for the GNOME desktop, simple and Linux-only, with forecasts for saved locations and no account.
Price: Free (Free open-source weather app for the GNOME desktop) (GNOME Weather pricing, checked 2026-10-24).
Platforms and license: Linux. GPL-2.0 (open source) (license source).
Project activity: 23 GitHub stars · last commit Oct 23, 2026
Best for: Linux desktop.
Worth knowing: License verified from the repository LICENSE/COPYING file on GitHub on 2026-10-24; platforms listed from project knowledge, not re-verified on the project site.
Open-Meteo
AGPL-3.0 open weather API and forecast site, usable from a browser or self-hosted; check its terms before commercial use.
Price: Free (Open-source weather API and forecast site; the license is AGPL-3.0 and any commercial API terms were not checked) (Open-Meteo pricing, checked 2026-10-24).
Platforms and license: Web browser, Self-hosted API. AGPL-3.0 (open source) (license source).
Project activity: 6.5k GitHub stars · latest release 1.7.0 (Oct 16, 2026) · last commit Oct 27, 2026
Best for: Developers and data users.
Which one to pick
- You want the widest choice of data sources: Breezy Weather
- You use a GNOME desktop: GNOME Weather
- You build your own dashboard: Open-Meteo
- You have an OpenWeatherMap key: Forecastie
Limits of this review
Docs-only for Breezy Weather, Geometric Weather, WeatherMaster, Forecastie, GNOME Weather, Open-Meteo: we did not install or run them, so feature claims come from vendor pages. Vendor prices and free limits change; confirm on the linked pricing page before you commit.
Related guides
Sources
Kevin Fan
Kevin Fan is a SaaS founder. He runs Free Instead Of, which tracks free and open-source alternatives to paid software and checks each price and free-plan limit against the vendor's own pages.
Methodology
Based on official pricing, license and product pages checked 2026-10-24: Breezy Weather, Geometric Weather, WeatherMaster, Forecastie, GNOME Weather, Open-Meteo. Prices, free limits and licenses are the figures shown on those pages on those dates. No tool on this page was installed or run. No accounts were created.