FFXi Weather
This is the website for a FFXi weather collection project that's been ongoing off and on since January 2022. The project aims to archive the retail weather data from packet capture and provide others with a dataset for study and use in their own projects. This project is not affiliated with any other project, group, etc. that may exist.
Prototype FFXi Weather Browser (warning/disclaimer: as this was a personal project originally written in 2022 as a prototype to view the captured data, expect an extremely large download size, a user interface that works best on desktop, and an inaccessible website design. region 41 (aht urhgan) has some display issues but the region is 100% complete.)
A copy of the dataset can be downloaded from here.
Current Status
- Launch: 99.85% complete
- Rize of the Zilart: 100% complete
- Chains of Promathia: 42.72% complete
- Treasures of Aht Urhgan: 44.89% complete
- Wings of the Goddess: 5.82% complete
- Seekers of Adoulin: 10.4% complete
- Rhapsodies of Vana'diel: 6.85% complete
- Total: 50.81% complete
Last updated 2026/02/08
Technical Information
A Vana'diel year is 360 Vana'diel days, a Vana'diel day is 24 Vana'diel hours, a Vana'diel hour is 60 Vana'diel minutes, and a Vana'diel minute is 60 Vana'diel seconds. The FFXi weather system repeats every 6 Vana'diel years. Vana'diel time runs 25 times faster than Earth time. Therefore, a complete cycle of the Vana'diel weather takes 86.4 Earth days. The weather, while originally believed to be randomly generated at runtime, is not actually random at all, and is the same across all servers, meaning that it can be archived perfectly. This also means that anyone attempting to duplicate work already done is just wasting their time and money.
The weather dataset is organized by weather region. Zones that share the same weather pattern are all part of the same weather region.
The downloadable weather dataset contains what has been captured and archived up to this point. zones.json is a mapping between the game's map zone index and weather region id. weather.json is organized by weather region id, and times are stored as Vana'diel minutes. null prev and next values are used to indicate missing data. A table of the client's "w" values are provided below. "t" values are the transition time values used by the game client for weather transition durations.
Weather types
- fine (fine patches, partly cloudy, not "NONE")
- suny (sunshine)
- clod (clouds)
- mist (fog)
- dryw (hot spells, fire weather)
- heat (heat waves, double fire)
- rain (rain, water weather)
- squl (squalls, double water)
- dust (dust storms, earth weather)
- sand (sand storms, double earth)
- wind (winds, wind weather)
- stom (gales, double wind)
- snow (snow, ice weather)
- bliz (blizzards, double ice)
- thdr (thunder, thunder weather)
- bolt (thunderstorms, double thunder)
- aura (auroras, light weather)
- ligt (stellar glare, double light)
- fogd (gloom, dark weather)
- dark (darkness, double dark)
Links
Legal
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR(S) DISCLAIM ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
THIS IS AN UNOFFICIAL, INDEPENDENT PROJECT NOT AFFILIATED WITH, ENDORSED BY,
OR APPROVED BY SQUARE ENIX OR ITS AFFILIATES. ALL TRADEMARKS AND GAME CONTENT ARE
PROPERTY OF SQUARE ENIX.
DATA PRESENTED IS DERIVED FROM PACKET CAPTURE ANALYSIS. NO COPYRIGHTED MATERIALS
ARE DISTRIBUTED WITHOUT TRANSFORMATION.
VIEWS EXPRESSED ARE SOLELY THOSE OF THE AUTHOR(S) AND DO NOT REPRESENT
SQUARE ENIX OR ANY OTHER PARTY.