Weather4D Routing & Navigation replaces Weather4D 2.0. This state of the art application integrates weather forecasting, routing calculations and navigation with marine charts to maximize your boating experience from preparation to post navigation track review.

With a wifi connection to a transponder, Weather4D Routing & Navigation instruments display information such as SOG, COG, TWS, AWS etc…, ETAs, ETWs, AIS data, in real time along with weather and routing information.

Between dusk and dawn, the screen can be set to night mode making it an ideal set of instruments during your watch.

Alarms can be set to let you know about low precision GPS signal, excessive XTE, course deviations, surrounding boats, wind speed and low depth.

Over 35 weather and oceanographic forecast models are available. Queries and downloads are fully customizable.

The application makes it possible to create your own geographical zones and to select the characteristics of the GRIB files to download: choice of data, resolution, periodicity, file size, etc. GRIB files can be downloaded wherever you are from our servers through a regular or satellite internet connection.

Weather4D Routing & Navigation displays the combined data as layered layers. All the data of a selected model is displayed by an animation in continuous time scrolling or in manual scrolling on the map.

The weather forecast is displayed in one or two windows (iPad only), offering several display combinations of the same area: navigation and weather, weather and waves or currents, comparison of different models. The two windows can be disassociated for displaying the same area at different scales.

Weather4D Routing & Navigation makes it possible to optimize sailing or motor, or mixed sail-motor routes.

You can save waypoints, locations, simulate routes, combine them with GRIB forecast models and thus get a holistic view of all the parameters affecting route calculations based on the selected options.

From a theoretical route using the engine, a routing calculation will take into account wind force and wave height constraints. When sailing, a polar combined with wind and current forecasts will also be used. In all cases, the routing calculation optimizes for safety, comfort and performance.

Several routes can be displayed to compare the outcome of different options: different forecast patterns, departure dates and times, selected constraint values. The routing can be restarted at any moment of navigation from the actual position of the boat.

Models and charts
Weather4D Routing comes standard with the GFS global forecast model at 0.25 °, 0.5 °, 1 ° and 2 ° resolutions. Two global satellite (BING) and global terrestrial (Open Street Map) charts.

GRIB files
The high-resolution weather models NAM, COAMPS, WRF (USA), GEM (Canada), ARPEGE Global, ARPEGE Europe, AROME, AROME HD (France), AROME (DOM-TOM), as well as WW3 wave models and MERCATOR OCEAN currents, and MFWAM and NCOM current models are supplied in a single pack available by annual subscription (integrated purchase).

Nautical charts
The official raster charts issued by the International Hydrographic Services come from the Geogarage cartographic server, which offers a wide choice subscription service and keeps them updated at all times. Chart selection is done per editor. Once the subscription is effective, charts are accessible within the application.

Currently available editors are:
CHS (Canada)
DHNV (Venezuela)
DHN (Brazil)
SHN (Argentina)
LINZ (New Zealand)
SHOM (France / DOM-TOM / Polynesia + international)
UKHO (UK and dependencies + international)
BSH (Germany)
NLHO (Netherlands)
VLAMMSE (Belgium)
DGA (Denmark)
NHS (Norway)
ICG-HD (Iceland)
NLHO (Nederland)

What's New

Version 2.0.39

- Added minimum sailing speed setting for simulation and routing
- Minor bug fixes

Ratings and Reviews

Cautiously optimistic


Update: While the new app is not intuitive and lacks the useful, exportable grib files via email, the customer service from Frederic to solve problems and assist in learning this new software is EXEMPLARY. We are hopeful that once we learn the new functionality of Weather 4D we will like it as much as we did Weather 4D Pro (the older version)

Great customer service


I just purchased the Routing and Navigation App on the recommendation of a friend. Although it looks like there is a steep learning curve, there is a free book on iTunes and I’ve gotten great help with quick and detailed responses via email from their support team. I’m looking forward to using the app for racing.


Olivier Bouyssou
207.4 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, French
Age Rating
Rated 4+
This app may use your location even when it isn't open, which can decrease battery life.
© 2015-2018 Olivier Bouyssou All rights reserved.
In-App Purchases
  1. 1 Year HD Forecast Subscription $33.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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