"It's the best Mac weather app."
-- John Gruber, Daring Fireball

Seasonality Core 2.0 is a Mac app any weather aficionado should have. That's because it's probably the most complete and detailed weather software I've ever seen on the Mac.
-- The Unofficial Apple Weblog

I'm a big fan of good weather-reporting software for years but never thought I'd find nirvana so easily. No weather program I've ever tried, for Windows, Linux or OS X, comes within a light year of Seasonality.
-- Al Fasoldt, The Post-Standard, Syracuse, NY.

Seasonality becomes your weather center. It does everything but control the weather.
-- Mac360


Seasonality Core is the complete weather center for your Mac. View weather at any of the 34,000 built-in locations in more than 200 countries, or add your own custom weather location to view even more precise data. Seasonality gives you an accurate 7 day forecast, graphs of past weather conditions, a custom satellite/radar image, and much more.

Seasonality Core's graphs are excellent at showing how weather conditions are changing over days, months, or even years. Seasonality Core will automatically collect and store weather data indefinitely.

The custom satellite/radar image gives users the option to adjust opacity of both overlays, show the latest North American surface analysis, and view the global wind flow with Particle Mode.

Seasonality Core has a solid foundation from being in development for more than 10 years. We always welcome feedback, and have made countless improvements to the software over the years based on user suggestions. If Seasonality Core is missing something, we want to hear about it! Send your feedback to our support email.


What we're working on:

• Higher resolution radar within the US.
• Improved radar coverage outside the US.
• Supporting personal weather stations.
• Weather watches and warnings.
• An even more flexible interface.

What's New

Version 2.5.1

• Fixed the help pages.

Ratings and Reviews



Everything you need is all there on one screen! Very accurate forecasts.

Great resource for weather geeks!


I've been using Seasonality Go on the iPad for a while, and finally decided to give the Mac app a try since it's been updated (and rather radically changed) from its original version (which was simply called "Seasonality"). I love the dark interface, and the access to the wide range of graphs for pressure, wind speed/direction, precipitation, etc (all of which can be turned on or off as desired). As a keyboard junkie, I appreciate that the developer made it easy to switch between saved locations with Command+1, Command+2, and so on. Full screen mode looks fantastic as well. Plus, having a journaling option gives me a central place to record my own weather observations, and keep all my WX stuff in one place. Excellent work!

Particle Mode Ruined, -1 Star


First, I love Seasonality Core. Really, really love it. Cool, fascinating, visually appealing and educational; overall a wonderful app!

One of the coolest features is Particle Mode which displays the movement and temperature of surface air using small color-coded moving particles (small dots). It was fascinating and highly educational watching how cold and hot air masses interact with one another, how winds move along and over mountain ranges and passes, how storms interact with surrounding air currents, etc.

Now, with the newly added "motion trails" in this version (2.4), Particle Mode runs much slower than before and looks plain awful. The trails are not only annoying and get in the way of seeing details, they are irrelevant; the particles, alone, are and where already in MOTION and TRAILING.

Yes, I can see times turning the trailing feature on would be cool. Turning them off would also be cool. Sadly, however, the developers decided we have no choice in the matter and don't give an option to turn them off.

I still love SC and still highly recommend it despite Particle Mode now being far less appealing. I just hope the developers choose to give us a choice soon and allow us the option to turn the annoying trails off.


Gaucho Software, LLC.
6.5 MB
Age Rating
Rated 4+
© 2005-2017 Gaucho Software, LLC.


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