By Nicko Brennan

  • Category: Weather
  • Release Date: 2011-04-06
  • Current Version: 1.2.10
  • Adult Rating: 4+
  • File Size: 26.96 MB
  • Developer: Nicko Brennan
  • Compatibility: Requires iOS 7.0 or later.
Score: 4.5
From 181 Ratings


With PocketGrib you can download, view and analyse global weather data while on the go. Wind, precipitation, pressure, temperature, wave and other data extracted from GRIB files are displayed through our powerful GRIB viewer interface. Perfect for sailors (both sailing and in the pub), windsurfers, storm chasers, outdoor enthusiasts, amateur and professional meteorologists. Features - Choose your map location and have weather information overlaid - Animation of weather maps - Weather can be viewed as a meteogram (graph) or raw data - Configurable download to minimise file sizes (great for roaming) - GRIB files can be downloaded to your PC via iTunes - Displays online and offline - Support for 3rd party GRIB files PocketGrib downloads and displays the following weather types: - Wind speed and direction (10 m above ground/sea) - Precipitation (rain, snow etc) - Pressure - Air temperature - Waves (including Mediterranean and Black Sea) - Cloud cover - Relative humidity - CAPE (Convective Atmospheric Potential Energy) - Current (Atlantic only) - 500mb Height Direct download of GRIB data from NOAA's GFS (Global Forecast System) model - Forecasts up to 8 days - Data steps: 3hr, 6hr, 12hr - Worldwide coverage - Resolution: 0.25°, 0.5°, 1°, 2° - Data updated 4 times a day (every 6 hours) Also support for COAMPS (0.2° resolution), WW3, NOGAPS, RTOFS (Currents) and FNMOC WW3 (Mediterranean wave) models. GRIB forecasts are published without human intervention or review. As such, the end user requires some knowledge and awareness. Most GRIB models do NOT accurately forecast hurricanes and tropical cyclones so their use should be combined with specific hurricane and tropical cyclone forecasts.



  • Great app

    By Moosebone
    Been using this for several years and have found it invaluable.
  • Invaluable for boating!

    By Pop Jeff
    I've used this app for almost 3 years now and rely on it so much I feel guilty I've never provided a review. I use this mainly for boating in the Upper Chesapeake. Power boating, not sail boating. In the upper bay both wind direction and wind speed play a role in how rough the water will be and I can use this app to show me when the tucking into a certain section of the bay or scooting into the Susquehanna River will find more protected waters at a given time.
  • I am a sailor, this app really works for me

    By Bob sailor
    Spend a little time learning the features and this app will become your first choice for passage planning. You will find that you can minimize the download file size by selecting the area you are interested in, the parameters you want to see, and the number of days that are of interest.
  • If only the Mac had a GRIB viewer this good

    By Hotfluids
    I can't imagine sailing without this program. It works so intuitively I don't even think about using it, I just do & get to concentrate on the weather, not the program. GRIBs are amazing and this program allows me to be able to harness their power! Update 20 Feb 16 - We have been using PocketGrib as live aboard cruisers for almost 2 years now. My wife now has it on her iPhone, & I have it on my iPads & iPhone. We use it nearly every day, and can not imagine Cruising from Boston Harbor to Great Exuma Island without it! Our Lagoon 420's mast is over 65', so we can not use the ICW & must go offshore, where we sail for up to 7 days without sight of land. My only PocketGrib complaint is that I wish it would work with my GlobalStar 9000 Satellite Phone WiFi router, or even Iridium Go (although I don't yet have that). Then we could get the latest GRIBs into our PocketGrib when we are over 20 nm offshore & out of cell phone range. Since we are usually well beyond 20 nm offshore for most of our offshore cruise, getting the latest GRIBs into our PocketGrib would be very valuable to us as GRIBs become less accurate with age.
  • A GREAT app!

    By D_Snow
    This does a wonderful job of displaying the weather forecast hour by hour. While it is designed for sailors with low bandwidth high cost communications it also works those of of with cheap hi bandwidth networks on land.
  • Sailor's Favorite Tool

    By Capt Bloodletter
    Quite good and easy to use. Keep this app handy.
  • Good source of info

    By Nascarrunner71
    I had a little trouble learning the app, but now it is a great source of weather info. We live on our sailboat and use this app daily to decide where to anchor next, or if we need to move. Only upgrade I can recommend is compressing data for Iridium use.
  • Bad

    By apoka123
    Ther is no wave info for US areas. I got this for $6 for the wave data... Would lile to get a refund. ... And the app also crashes...bad bad bad
  • Excellent

    By Edkess
    I use this app every day. No glitches; just solid performance.
  • Crashes

    By FairWinds585
    The app crashes each time I try to download new products. Please update! I didn't pay $5 to have an app that doesn't work.