Water Safety in Idaho

Idaho water is cold, and that shapes every safety rule here. Wear a life jacket on every boat, raft and float tube, because Idaho's water averages about 52 degrees even in summer, and a sudden fall into cold water can make it hard to breathe or swim. Idaho law already requires it for kids 14 and under on small boats.

Idaho drowning and boating numbers

1.71 per 100,000

• Drowning: CDC puts Idaho's average annual drowning death rate for 2018-2021 at 1.71 per 100,000 people (opens in a new tab), in the highest band on its map.
• Boating: The U.S. Coast Guard counted 39 reportable recreational boating incidents in Idaho in 2024, with 4 deaths and 16 injuries (opens in a new tab). Deaths by year: 5 in 2020, 10 in 2021, 15 in 2022, 7 in 2023 and 4 in 2024.
• State pattern: Idaho Parks and Recreation says that in the past ten years nearly 67% of the fatal boating accidents in Idaho were the result of victims involuntarily entering the water from small boats (opens in a new tab).

CDC counts drowning deaths of residents; the Coast Guard counts all deaths in reported boating incidents. See our Idaho data page.

Cold water, all year

Idaho Parks and Recreation puts it plainly: the average water temperature of Idaho's water is 52 degrees, even during the summer (opens in a new tab). It recommends that all boat passengers wear life jackets, especially in cold water.

At that temperature, the National Weather Service says cold shock can be just as severe and dangerous (opens in a new tab) as in near-freezing water. You gasp, you breathe fast, and you can inhale water in the first minutes. A life jacket holds your head up while your breathing settles. Read cold water shock and what to do if you fall overboard.

Rivers add current. Before you float, read our river safety guide.

Idaho life jacket rules

From Idaho Parks and Recreation:

• Kids: kids 14 years of age and under on boats 19 feet or less are required to wear a Coast Guard approved and properly fitting life jacket when underway (opens in a new tab). This covers canoes, rafts, powerboats, sailboats, personal watercraft and fishing float tubes.
• Personal watercraft and towing: regardless of age, you must wear a life jacket on a personal watercraft and when being pulled behind a boat (skiing, wakeboarding, tubing).
• Every boat: life jackets must be Coast Guard approved, the right size, in good condition and within easy reach.

Loaner life jackets and free classes

Idaho Parks and Recreation publishes a map of life jacket loaner stations (opens in a new tab). Look up the one nearest your launch before you go. Our guide to loaner stations explains how they work.

Idaho's Safe Boating Act has no general boater education requirement (opens in a new tab). It does require a course after repeat boating violations, and personal watercraft renters must get instruction from the rental business. Even so, the state offers a free in-person boating safety class and a free home study guide (opens in a new tab), plus approved online courses.

This is a summary, not legal advice. Check Idaho Parks and Recreation before you go.

Official Idaho resources

• Idaho Parks and Recreation boating (opens in a new tab)
• Life jacket loaner station map (opens in a new tab)

What you can do today

• Fit a life jacket for every child 14 and under, and wear one yourself.
• Find the loaner station at your favorite launch on the state map.
• Sign up for Idaho's free boating safety class or home study course.
• Dress for 52-degree water, not for the air.
• Learn the rescue rule: reach or throw, don't go.