Section 5: Rules of Play
5.1 Heat Format
- Heat duration: Standard heats are 30 minutes. The Competition Director may shorten heats to 20 or 25 minutes or extend to 35 minutes based on wave frequency and conditions.
- Surfers per heat: Early rounds may feature 3–4 surfers per heat. From the Round of 16 onward (and all Olympic rounds from Round 3), heats are man-on-man (2 surfers).
- Wave count: There is no limit on the number of waves a surfer may catch during a heat. However, only the best 2 wave scores count toward the heat total.
- Heat start: A horn or siren signals the start and end of each heat. Surfers are in the water and positioned in the lineup before the start signal.
5.2 Priority System
The priority system is the most critical rule in competitive surfing, governing the right of way on waves:
- Establishing priority: At the start of a heat, priority is determined by paddle position relative to the peak (curl) of the wave. The surfer closest to the breaking part of the wave has priority.
- Priority rotation: After a surfer catches and rides a wave (stands up and makes a deliberate ride), that surfer moves to lowest priority. The remaining surfer(s) move up in priority order.
- Paddling for a wave: A surfer with priority who paddles for and commits to a wave claims that wave. The non-priority surfer must yield.
- Split peaks: If a wave breaks in two directions (A-frame), one surfer may take the left and another the right without interference, as they are riding different sections of the wave.
- Priority indicator: An electronic or flag-based display on the beach and/or in the water shows which surfer currently holds priority.
5.3 Wave Selection Strategy
With only the best 2 waves counting, surfers must balance quality versus quantity. Catching many waves provides more scoring opportunities but consumes paddling energy and resets priority. Experienced competitors often sit deep in the lineup, waiting for the largest set waves to maximize individual wave scores rather than accumulating marginal attempts.
5.4 Competition Format
- Olympic format: Initial seeding rounds, followed by main rounds leading to elimination rounds with a repechage (second-chance) system. Surfers who lose in early main rounds drop to the repechage bracket, where they can re-enter the competition. The repechage ensures a loss in one heat does not mean immediate elimination.
- ISA World Surfing Games: Round-robin group stages followed by single-elimination knockout rounds. Both individual and team standings are tracked simultaneously.
- Advancement: In multi-surfer heats (3–4 surfers), typically the top 1 or 2 surfers advance. In man-on-man heats, the winner advances and the loser is eliminated (or enters repechage).
- Medal matches: Semifinals determine the Gold Medal match and the Bronze Medal match. There is no bronze medal playoff between losing semifinalists in some formats — the Olympic format uses direct semifinals-to-final progression.
5.5 Conduct During Heats
- Surfers must remain within the designated competition zone throughout the heat.
- Coaching from the beach, channel, or any external source is prohibited during heats.
- Surfers may not receive any electronic communication (radio, earpiece) during a heat.
- A surfer who loses their board must retrieve it by swimming; no external assistance is permitted unless a safety issue arises.