iGrib is a GRIB (GRIdded Binary) file viewer for iOS (iPad, iPhone and iPod Touch).

This allows you to see the same data that the professionals use for forecasting.

This app is particularly valuable for people like sailors who require a longer range forecast. (The author is a sailor)

Grib files are available with up to 10 days forecast of temperature, wind, cloud cover, precipitation, pressure, relative humidity and CAPE - for various regions covering most of the world. Alternatively you can define your own files from within the app or use files from 3rd parties.

View one or more parameters at a time on the map, or touch and hold to see all the data for a particular point.

What’s New

Version 2.4.1

Urgent bug fix and technical update.

From the previous version you'll most likely be updating from:

- iPhone6 and 6Plus screen compatibility

- File definition improvements:
- A new UI for defining your own files
- Include CAPE, Relative Humidity and wind GUST in your own files
- Specify a less frequent interval for the data points (to save file size)
- Include a space in the name you choose for files that you define

- The key button is disabled whilst you don't have an applicable layer visible.

- Fixed a bug that for some users prevented the automatic display of when updates are available.

- Various other minor IOS8 updates to keep with the times...

Ratings and Reviews

4.6 out of 5
41 Ratings
41 Ratings
pnjr1950 ,

Great sailing weather app

Have used this for several years in UK and Europe mainly for sailing weather. Allows you to understand the forthcoming weather so much better. Best features are the files, once loaded can be looked at when out of internet access. Also that one can cycle through at your own pace to watch changes.

Tron_7654 ,

Straight simple GRiB file viewer. Does what it says on the can!

I like this app on both iPhone and iPad. I've used it for day sailing in UK waters & also on two longer trips to and from the Med. it's compared well against much more expensive s/w tools.

Burntbum ,

Great for sailors

Always worked very well for me and allows me to work out for myself what is happening with the weather systems to plan voyages. Don't understand those who can't make it work. Easy enough.


James Eddison
13 MB
Requires iOS 6.0 or later. Compatible with iPhone, iPad and iPod touch.
Age Rating
Rated 4+
© Mojoso 2010-2015


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

More By This Developer

You May Also Like