High-Resolution Ocean Maps for Hawaiian Waters

Yes! Download maps for your fishing areas while you have WiFi, then use them offshore with no internet connection. Map layers, placemarks, and GPS tracks always work offline with no download required — only the bathymetry map tiles need to be downloaded ahead of time. Perfect for when you're miles from shore.

All Hawaiian Islands are covered with high-resolution 3-meter NOAA CUDEM data, including Oahu, Maui, Big Island, Kauai, Molokai, Lanai, and Niihau.

$9.99 one-time purchase. No subscriptions, no ads, no in-app purchases. Pay once and own it forever.

We use NOAA's Continuously Updated Digital Elevation Model (CUDEM), the highest-quality publicly available bathymetry data for Hawaiian waters. This is the same data used by professional marine researchers and NOAA itself.

Hawaii Ocean Map is available on iPhone, iPad (iOS 17.0+), and Android devices (Android 8.0+). Optimized for all screen sizes.

The app includes a dedicated Map Layers page where you can toggle and explore ocean overlays. Layers include 86 official fishing restriction zones from Hawaii DLNR, 188 ORMA ocean recreation management areas, humpback whale sanctuary boundaries, submarine cable routes, and curated points of interest (harbors, boat ramps, FAD buoys, surf spots, dive spots, and lifeguard towers). Tap any layer to zoom to it on the map.

On iOS, your placemarks are stored on your device and in your personal iCloud account — no one else, including me, can access them. On Android, placemarks are stored on your device with optional cloud sync via Firebase, which does not offer the same level of privacy as iCloud (the app developer has access to the Firebase database). I will never share, sell, or make your data public. See the Privacy Policy for full details on how your data is stored and protected.

Map tiles and offline regions will need to be re-downloaded after reinstalling, but your placemarks and GPS tracks will automatically sync back. On iOS, your data restores when you sign in with the same Apple ID and also syncs across all your Apple devices. On Android, your data restores when you sign in with the same Google account and syncs across your Android devices.