Water Polo Rules: How the Game Works at Every Level

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The whistle blows, a referee sweeps an arm toward the corner of the pool, and a defender swims off to the re-entry area while his team scrambles to cover six attackers with five. The shot clock on the wall drops, the crowd counts it down, and a shot from the wing rips into the top corner. That one sequence is most of what you need to know about water polo rules: exclusions, the shot clock and the fight for position. This page explains the basics under World Aquatics rules, the positions, and how NCAA college and NFHS high school rules differ.

Water polo rules at a glance, by level

	World Aquatics (international, Olympics)	NCAA college	High school (NFHS)
Periods	4 × 8 minutes of actual play	4 × 8 minutes	Varsity usually 4 × 7 minutes; JV 4 × 6
Breaks	2 minutes between periods, 5 at halftime	3 minutes between periods, 5 at halftime	2 minutes between periods, 5 at halftime (CIF-LA)
Shot clock	28 seconds, reset to 18 after a rebound kept by the attack, an exclusion or a corner	30 seconds	30 seconds
Exclusion	18 seconds or until a goal or change of possession	20 seconds or the earliest of those events	20 seconds or until a goal or change of possession
Timeouts	2 per team, 1 minute each	3 per team in regulation, up to 2 minutes each, 1 in overtime	Set by NFHS rules
Tied at full time	Penalty shootout	Two 3-minute overtime periods, then 3-minute sudden-victory periods	Overtime periods, then sudden victory
Field	25 m between goal lines, 20 m wide; at least 1.8 m deep	22.9–25 m long, 13–20 m wide; at least 2 m deep for most of it	Set by NFHS rules and the pool

Every level uses seven players per side, one of them the goalkeeper, and the same caps-with-ear-guards rule. In all three rulebooks, a player with three personal fouls is out for the rest of the game.

The basics of play

• The start: each period begins with players lined up on their own goal lines. At the whistle, the referee releases the ball at the half-distance line and the fastest swimmers sprint for it.
• One hand: field players may play the ball with only one hand at a time and may not punch it. The goalkeeper may use both hands and a clenched fist, but only inside the 6-meter area.
• No standing: taking part in play while standing on the bottom, walking, or jumping off the floor is a foul, except for the goalkeeper inside 6 meters.
• Ball under water: taking the whole ball under water when tackled is a foul.
• Scoring: the whole ball must cross the goal line between the posts and under the crossbar. A goal can be scored with any part of the body except a clenched fist. The World Aquatics goal is 3 meters wide, with the crossbar 0.9 meters above the water.
• The goal area: attackers may not be inside the area in front of the goal (to the 2-meter line, 2 meters outside each post) ahead of the ball. The NCAA and NFHS adopted this goal area in 2024, replacing the old rule that applied to the whole 2-meter line.

Fouls: ordinary, exclusion and penalty

Ordinary fouls are the most common whistle: holding or pushing off the goal or the pool wall, pushing off an opponent who doesn’t have the ball, playing the ball with two hands, wasting the shot clock, simulating a foul. The other team gets a free throw, which must be taken without delay; under World Aquatics rules a player may shoot directly from a free throw taken outside 6 meters.

Exclusion fouls send a player out. The main ones: holding, sinking or pulling back an opponent who isn’t holding the ball, impeding a player without the ball, blocking a pass or shot with two hands outside 6 meters, splashing an opponent in the face, kicking or striking, interfering with a free throw, and misconduct. The excluded player swims to the re-entry area near their own goal without leaving the water and may come back (or a substitute may) after 18 seconds under World Aquatics rules (20 seconds in college and high school), or sooner if a goal is scored or their team gets the ball back. That stretch of six against five is called the “man-up” or power play, and it is where many goals are scored.

Penalty fouls are fouls inside the 6-meter area that stop a probable goal, plus a few others such as pulling the goal out of place or blocking with two hands inside 6 meters. The attacking team gets a penalty throw from the 5-meter line, one shooter against the goalkeeper. Every exclusion or penalty foul counts as a personal foul; at three, the player is out for the rest of the game and a substitute takes their place. A violent action, such as kicking or striking an opponent with malicious intent, is harsher still under World Aquatics rules: the player is out for the rest of the game, the other team gets a penalty throw (if it happens during play), and no substitute may come in until four minutes of play have passed. Referees also show yellow and red cards, mostly to coaches and benches.

Water polo positions

• Goalkeeper: wears the red cap (number 1) and guards the goal. Strong legs let goalkeepers rise high out of the water to block shots.
• Center (hole set or 2-meter): the attacking player in front of the goal, near the 2-meter line, who fights for position with their back to the goal and draws exclusions.
• Center defender (hole guard): the defender who battles the center, from in front or behind.
• Drivers and wings: the outside attackers who swim, cut toward the goal, feed the center and shoot from the sides.
• Point: the attacker at the top of the formation, farthest from the goal, who often runs the offense like a point guard.

Since the 2025 rule changes, World Aquatics no longer requires a team to keep a goalkeeper in the water after the start: a team may play with seven field players. The NCAA adopted a similar change for 2026-27.

Rules for younger players

USA Water Polo plays a smaller game for kids. Under its 2022–2024 rules, 10U plays 5v5 with four 5-minute quarters and a size 2 ball, and 12U plays 6v6 with four 6-minute quarters and a size 3 ball, both with a 30-second shot clock. An excluded 10U or 12U player has no set time to serve: they swim to the re-entry area and may come back as soon as their head rises above the water there. Younger players also can’t shoot directly from a free throw or corner throw; they have to put the ball in play first. Our youth water polo guide has more.

Safety rules

Caps with ear guards must be worn and fastened under the chin for the whole game. Players must remove anything likely to cause injury; NFHS rules name jewelry, watches and swim goggles, and require sharp fingernails and toenails to be trimmed. Only prescription goggles made for contact sports, approved in advance, are allowed. Mouthguards are allowed in high school and college without special permission. A bleeding player must leave the water right away and a substitute enters. Under USA Water Polo’s rules, a referee may stop the game for up to three minutes to check a player after a hard blow to the head, and a player suspected of a concussion can’t return to that game. See our water polo injuries page for what to do next and the water polo gear page for caps, suits and mouthguards.

For referees, coaches and the pool deck

Every game needs a loud whistle and the right ball. The Fox 40 Classic is a pealess whistle the maker rates at 115 dB, for about $8. For the ball, the KAP7 HydroGrip size 5 is the men’s ball, which KAP7 calls the official NCAA men’s game ball and says is NFHS and USA Water Polo approved, and the KAP7 HydroGrip size 4, which KAP7 calls the official NCAA women’s game ball, is the size for women, girls and 14U boys (each about $40 on Amazon in October 2026).

Back to the water polo hub, or see water polo leagues and associations. Comparing sports? Our soccer rules and swimming rules pages work the same way. After a long tournament, our recovery shoes guide has slides for the pool deck.

Water polo rules questions

How long is the shot clock in water polo?

28 seconds under World Aquatics rules since 2025, reset to 18 seconds after an exclusion, a corner throw or a rebound the attack keeps. NCAA and high school games use a 30-second shot clock.

How long is an exclusion in water polo?

18 seconds of play under World Aquatics rules and 20 seconds in NCAA and high school play, or less if a goal is scored or the excluded player’s team gets the ball back.

What happens after three personal fouls?

The player is out for the rest of the game. A substitute can take their place once the player reaches the re-entry area and the exclusion ends.

Can you wear goggles in water polo?

Not ordinary swim goggles in games. High school rules list them among items players must remove, and the NCAA allows only prescription goggles made for contact sports, approved in advance. Goggles are fine for swim sets in practice.

How is a tied water polo game decided?

World Aquatics games go straight to a penalty shootout. NCAA games play two 3-minute overtime periods and then 3-minute sudden-victory periods until someone scores.