HI Buoy2.3 - App Store

Paddle out knowing what's out.

Every wave buoy in the Hawaiian chain, in one place, reporting what the ocean is actually doing.

HI Buoy reads live from the NOAA National Data Buoy Center stations moored around the islands - Waimea Bay, Barbers Point, Mokapu Point, Hanalei, Pauwela, Hilo, and the deep-water stations far offshore - and shows you the numbers straight.

This is measured data, not a forecast. Every figure came off a buoy in the water.

THE WHOLE CHAIN AT A GLANCE
Open the map and every buoy carries its current wave height and swell direction, color-coded so a big day stands out before you read a single number. Tap any buoy for the full picture.

THE NUMBERS THAT MATTER
Wave height, dominant period, average period and dominant direction, plus the swell and wind-wave trains broken out separately with their own height, period and direction. A steepness reading tells you whether it's clean groundswell or short, wind-driven chop.

SWELL POWER
A height reading alone won't tell you whether a swell is filling in or fading. HI Buoy charts sixteen hours of hourly spectral energy so you can see the trend, with the raw frequency spectra underneath. Touch and drag to inspect any hour.

RECENT LOG
The last sixteen hourly observations laid out in full - height, period, direction, swell and wind wave - so you can read the shift for yourself.

HONEST WHEN A BUOY GOES QUIET
Buoys break down, drift, and get pulled for maintenance. When one stops reporting, HI Buoy says so plainly instead of leaving an old number on screen looking current.

BUILT FOR THE ISLANDS
All times in Hawaii Standard Time, no converting in your head. Choose which buoys you want to see and hide the rest. A large-type setting for reading at arm's length. Designed for iPhone and iPad, in portrait and landscape.

Version History HI Buoy has been rebuilt from the ground up.
• A new map of every buoy around the islands, framed to fit your screen
• Swell Power chart with touch-and-drag readings
• Swell and wind wave shown separately, with a 16-hour trend on every buoy
• Buoys that stop reporting are clearly marked
• Works in portrait and landscape, on phones and tablets 2.3 Oct 1 HI Buoy has been rebuilt from the ground up.
• A new map of every buoy around the islands, framed to fit your screen
• Swell Power chart with touch-and-drag readings
• Swell and wind wave shown separately, with a 16-hour trend on every buoy
• Buoys that stop reporting are clearly marked
• Works in portrait and landscape, on phones and tablets 2.2 Sep 29 Complete App Redesign. 2.1 Sep 25 HI Buoy has been rebuilt from the ground up.

• A live map of the whole chain. Every buoy shows its current height and swell direction at any zoom level, color-coded by size, so you can read the islands in one look.

• Swell Power charts. Sixteen hours of hourly spectral energy per buoy, with the raw frequency spectra underneath and touch-and-drag inspection.

• A clear not-reporting signal. When a buoy stops sending, the app says so rather than showing a stale reading as if it were current.

• Redesigned recent log. The full sixteen-hour record, readable in landscape on iPhone and side by side with the chart on iPad.

• Full iPad support in both orientations, with layouts that use the extra room instead of stretching the phone screen.

• A large-type setting for reading at arm's length. 2.0.0 Sep 19 Stability Update. 1.7.1 10/21/2022 Buoy Listing View. 1.7.0 05/12/2022 Stability Update. 1.6.1 09/11/2021 Swell Power Graph and Historical Data for the last 16 hours. 1.5.3 01/30/2021 Stability Update. 1.5.2 01/22/2021 New Feature: View the Swell Power Graph for the last 8 hours by tapping on a buoy. 1.5.1 11/11/2020 Stability Update. 1.5.0 11/05/2020 Stability Update. 1.04 02/27/2020 Stability Update. 1.03 02/21/2020 Stability Update. 1.02 02/19/2020 Stability Update. 1.01 02/13/2020 1.0 02/08/2020