PNW Current Atlas 4+

Current prediction charts

TinyOctopus, LLC

Designed for iPad

    • 3.7 • 22 Ratings
    • Free
    • Offers In-App Purchases



The PNW Current Atlas brings a fast and easy way to view Pacific Northwest current prediction charts for the Juan de Fuca Strait / Strait of Georgia regions on your mobile device. This includes complete coverage of the US San Juan Islands, the Canadian Gulf Islands, and the Eastern Juan de Fuca Strait and more.

This digital current atlas includes predictions for the current year with free yearly updates so that you never have to buy a reference or look-up table ever again.

◆ View any date/time within a tide cycle, past or future (within the current year)
◆ Easily jump to the prediction closest to Now with a single tap
◆ Easily move forwards or backwards through prediction time by tapping or swiping
◆ Zoom into predictions to see more detail
◆ Works offline - no Internet connection needed!
◆ Includes all predictions for the current calendar year with free yearly updates
◆ and more...

What’s New

Version 1.0.7

Updated predictions for 2024

Ratings and Reviews

3.7 out of 5
22 Ratings

22 Ratings

CED6870 ,

Great App, times seem to be off

Update: Thank you for the quick response. We do find the app very useful in seeing current trends where there is no Navionics current data.

The currents seem to be off by an amount of time. (1hr late?). Navionics is correct for the points they report out on, comparing to exact places.

Developer Response ,

Yes the app is fully DST aware. Internally everything is in GMT/UTC and converted to the timezone your device has set, i.e. your local time.

Current atlas charts are not appropriate for timing current passes like Dodd, Gabriola, Active Pass, etc. As an atlas, charts were never designed for predicting restricted areas but rather large scale patterns. In fact the closest current “arrow” on charts near a pass is likely outside the actual pass as defined by a current and tide table. Always use an official current table for transiting passes.

As for the chart time spacing between pages, there is no standardized length of time between chart pages because the time duration between each low and high tide varies for each tide cycle. There are a set number of charts for each cycle and the time is divided to space out the charts to match the cycle duration.

Hope this helps. And thanks for the info on the support page not working. We’ll get it fix asap.

Rsmullen ,

Great Resource

At one point I was using the app and I found what I thought was an error since there was a disagreement between the paper current atlas and the app. I recorded the time and the referenced pages and reached out to the author of the app. He wrote several emails explaining the additional algorithms used for the app, and how since the paper atlas is by hour is often doesn’t show small reversals and other small changes. He walked me thru the data used and how his app presents the analysis. I won’t stop referencing the paper current atlas but I will use this app as well. Randall

Fred1957X ,


I sail a small boat in these waters, and depend on the Canadian current atlas for every trip. This implementation is fantastic. And since you have to buy an update to the printed atlas every year for $20, the once off price for the app is well worth it. The app also lets you scan the currents hourly, instead of paging through the printed guide. Very impressive.

App Privacy

The developer, TinyOctopus, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

More By This Developer

You Might Also Like