A Marble in the Jar: Surfing, Coaching and an ALS Diagnosis

A 71-minute documentary about Tatiana Weston-Webb and her coach Greg Browning reaches limited cinemas on 11 September, and streaming on 3 November.

By Miles Ashworth · 3 Sept 2026 · 2 min read · United Kingdom edition

Official poster for A Marble in the Jar. Promotional key art via the film's official website.

A Marble in the Jar, a 71-minute documentary about Brazilian surfer Tatiana Weston-Webb and her coach Greg Browning, gets a limited theatrical release on 11 September 2026, before streaming from 3 November. The film follows Weston-Webb's rise to the top of women's surfing alongside Browning's own fight with ALS, and the friendship the two have built along the way.

Browning co-directed the film himself, with Scott Smith, and the two also share writing credit. Weston-Webb and Browning both serve as executive producers, making this a genuinely personal project rather than an outside studio's take on their story. The film features appearances from some of the biggest names in the sport: Kelly Slater, Carissa Moore, Ross Williams and WSL commentator Joe Turpel all appear. It is distributed by Level 33 Entertainment, with Rockstar Energy and Body Glove attached as partners.

Who the Film Is About

Weston-Webb was born in Porto Alegre, Brazil, in 1996 and moved to Hawaii within two months, growing up on Kauai. She has spent a decade near the top of women's surfing. She was the WSL's Rookie of the Year in 2015, won the US Open of Surfing at Huntington Beach in 2016, and finished the 2021 World Tour season ranked second in the world. At the 2024 Paris Olympics she won silver in the women's shortboard event, becoming the first Brazilian woman to win an Olympic surfing medal.

Tatiana Weston-Webb on the beach at Oceanside, California, in 2016, the year she won the US Open of Surfing at Huntington Beach. Photo: Kathy Klossner / Water Dancer Photos, via Wikimedia Commons (CC BY-SA 4.0).

The film's central tension comes from Browning's diagnosis with ALS, amyotrophic lateral sclerosis, a progressive disease affecting the nerve cells that control muscle movement, and the choice both he and Weston-Webb have made to keep working, and keep the coaching relationship going, through it. Beyond that framing, detailed public information about Browning's own surfing background is limited, and the film itself is the primary account of his story so far.

Where to See It

The film opens in limited theatrical release on 11 September 2026, ahead of a wider streaming release on 3 November. Given the runtime and the subject matter, it sits closer to an intimate character study than a conventional surf film, built as much around the relationship between coach and athlete as around any single competition.