Downwind Foil

Paddle onto a passing bump, then ride open-ocean swell for kilometres

67 boards · 12 brands · 282 sizes

Downwind foiling means riding the wind-driven bumps of open water on a hydrofoil, travelling with the wind from one point to another along a coast or across a channel. Riders usually paddle up onto foil, then link one bump to the next for kilometres with almost no effort. It began with Hawaiian SUP downwinders and now has its own races, record attempts and long, narrow boards.

A typical downwind foil board, 2286 by 491 mm
the typical outline: every board’s shape averaged at the median length and width

The typical board

The typical downwind foil board is 2261 × 502 mm, 105 L, with a pin tail and its wide point ahead of centre.

1727–2591mm long · median 2261

432–584mm wide · median 502

70–135litres · median 105

4.6length over width, median · derived

Ranges hold the middle 80 % of every size listed · tails: pin tail 33, square tail 16, rounded pin tail 13, round tail 4, swallow tail 1

How It Rides

What moves it

Wind blowing over a long fetch builds moving bumps, and each one carries energy a foil can use. The rider sprints with a paddle, or sometimes a stowable wing or parawing, until a bump lifts the board onto the foil. After that, gravity on the face of the swell keeps the board moving, and the rider pumps across flat patches to reach the next bump. The foil's lift needs only modest speed, so even small, irregular wind swell can carry a rider a long way.

Reading the shape

Downwind boards are the longest and narrowest boards in the foil family, typically 7'2 to 8'4 long and 19–22 in wide, with a recessed deck. Length gives a long waterline to accelerate into a bump before take-off. A narrow outline paddles faster and releases from the water more easily, at the cost of stability. Armstrong's range shows the pattern: 7'2 x 19.5 in (96 L) up to 8'5 x 21.25 in (140 L), with a V nose, double concave and bottom chines for clean release. A shop guide's rule of thumb is body weight plus 10–30 L for intermediates and roughly body weight (−8 to +12 L) for advanced riders.

How to read any board: length and width, wide point, tails, rails, rocker

Wind

a steady breeze along the coast or channel, strong enough to build wind swell (e.g. trade winds)

Water

open-ocean wind swell and bumps; groundswell helps

Worth knowing

Most runs are one-way, so you need a shuttle or a way back upwind.

The Rack

Every downwind foil board, shortest to longest, one scale · from the Takoon Prosurf 2026 (1473 mm) to the Kalama Barracuda XP V2 (2743 mm)

All 67 in the catalogue

Good To Know

  1. The SUP foil course record for the Molokai-2-Oahu channel crossing is 1:56:55, set by Edoardo Tanas in 2025. In 2017 Kai Lenny's unofficial foil crossing took 3 h 26, so the record has dropped by about an hour and a half in eight years. [1][2]

  2. On 12 July 2026 the Frenchman Erwan Jauffroy crossed the English Channel from Eastbourne to Cherbourg on a foil with no sail and no motor, using only wave energy and his own effort. He spent 8 h 08 min 18 s on the water and covered 191.6 km of tracked distance, with a safety escort. [3][4]

  3. On 29 June 2023 Olivia Piana of France downwind-foiled about 285 km along Portugal's west coast from Peniche in 14 h 36 min. That beat James Casey's 2022 mark of 213 km by roughly 70 km. [5][6]

  4. The Maliko run on Maui, from Maliko Gulch to Kahului Harbor, is about 15 km of trade-wind bumps. Riders first have to get through the reef about 1.5–2 km offshore before turning west down the coast. [7]

  5. At the 2026 Molokai-2-Oahu, more than 100 athletes raced the SUP foil divisions, while only seven solo paddlers entered the traditional, non-foil stand-up races. [8]

Watch And Read

Who Makes Them

Where And When

Where to watch it

  • Maliko run, Maui, HawaiiAbout 15 km of trade-wind bumps from Maliko Gulch to Kahului, where downwind foiling started.
  • Ka'iwi (Molokai) Channel, HawaiiThe Molokai-2-Oahu crossing is the sport's world-championship race.
  • Peniche and Portugal's west coastOlivia Piana started her roughly 285 km downwind-foil record run here in June 2023.

Where it came from

Hawaiian SUP racers were crossing the Ka'iwi (Molokai) channel by about 2005. In spring 2016 Kai Lenny was filmed foiling the Maliko run on a cut-down race board with a GoFoil and only a paddle, and that clip started the sport. Boards then went from wide SUP foil boards to dedicated narrow downwind shapes around 2022–23, and parawings (2024) gave riders a way to get going without a paddle.

More disciplines

Sources

  1. [1]

    Molokai 2 Oahu (M2O) — Events

    DWFoil, 2026 · tier 2 · article

  2. [2]
  3. [3]

    First English Channel crossing on a foil powered only by waves

    Foiling Freaks, 2026-07-12 · tier 2 · record

  4. [4]
  5. [5]

    Olivia Piana Sets New Downwind Foil World Record - 287.4km

    SUPboarder Magazine, 2023-07-05 · tier 2 · article

  6. [6]

    Olivia Piana breaks Downwind World Record

    Stand Up Magazin, 2023-07 · tier 2 · article

  7. [7]

    Maliko Run - Downwind Runs Database

    Downwindable · tier 3 · reference

  8. [8]

    Molokai 2 Oahu Results 2026: A Changing Landscape for Stand Up Paddling

    SUPboarder Magazine, 2026-07-30 · tier 2 · article

  9. [9]

    Downwind SUP Foil Board Size Guide 2026

    The Quiver, 2026 · tier 3 · reference

  10. [10]

    Downwind FG Board

    Armstrong Foils · tier 3 · manufacturer

  11. [11]

    Armstrong Foils Downwind SUP 7'7, 21 2023

    Tonic, 2023 · tier 2 · article