Author: Will Hay


The classic ‘Slip, Slop, Slap & Wrap’ has long been a staple for sun protection in Aotearoa New Zealand where the sun is particularly harsh - even compared to ‘hotter’ countries like Australia. Aotearoa unfortunately has the perfect recipe for UV intensity. Positioned under the "hole" in the ozone layer over the Antarctic region, New Zealand experiences less natural filtration of harmful UV rays. During the summer months, the sun sits at a higher angle in the sky, making its rays more direct and potent. To make matters worse, the country’s clear atmosphere and the reflective surfaces of surrounding waters that encapsulate the nation, amplify UV exposure - a factor that boaties, in particular, need to be mindful of.

These factors make sun protection and heat management critical for anyone enjoying the outdoors, especially boaties who are often exposed for extended periods of time. The ill effects of sun exposure are not just irritating but can be deadly, with extended exposure to the sun and heat leading to several health issues, including: 

  • Sunburn: Caused by excessive UV radiation, leading to skin damage and increasing the risk of skin cancer. This unfortunately is the most common cancer in New Zealand and we have one of the highest rates of skin cancer worldwide.
  • Heat exhaustion: Prolonged exposure to high temperatures, especially under direct sunlight, can cause the body to overheat and lose fluids and salts through excessive sweating. Symptoms such as heavy sweating, weakness, dizziness and nausea can be exacerbated on the water where reflective surfaces like the sea only amplify heat exposure. On a boat, these symptoms may lead to impaired judgment, reduced physical coordination, and fatigue - critical issues when navigating or managing safety equipment. Without intervention, such as moving to a shaded area, hydrating, and cooling down, heat exhaustion can progress to heatstroke.
  • Heatstroke: This life-threatening condition occurs when the body’s temperature regulation system fails, causing a rapid increase in internal temperature. Symptoms may include confusion, rapid breathing, flushed skin, and even loss of consciousness. On a boat, heatstroke poses unique dangers. It can incapacitate an individual, making it difficult to operate the vessel, assist others, or call for help. Additionally, the physical effects of heatstroke, such as dizziness or fainting, heighten the risk of falling overboard. Immediate medical intervention is crucial to prevent severe complications.

Six ways to stay cool and sun-safe while boating this summer

 1.  Wear appropriate clothing:

  • Lightweight, breathable fabrics: Opt for clothing made from materials that allow air circulation to help regulate body temperature. Lighter and looser fits allow more air flow which will keep you cooler, giving your skin a chance to breathe. You can couple this with an inflatable lifejacket to minimise the blanketing feeling of a foam one further on those hotter days.
  • UV-protective clothing: Utilise garments with built-in UV protection to reduce sun exposure. Loose fitting long sleeve fishing performance shirts are growing in popularity worldwide for good reason, these are a good combination of these two points and provide superb protection from the sun.
  • Wide-brimmed hats and sunglasses: Protecting your face and eyes from direct sunlight is crucial as often it’s the areas you don’t think about that get hit the worst such as the tips of your ears. Polarised sunnies protect your eyes from the sun but also reduce the glare off the water so they are a good investment for any water-based activity.

2.  Apply sunscreen regularly:

  • Broad-spectrum sunscreen: Use a sunscreen with a high SPF rating to protect against both UVA and UVB rays and cover EVERYWHERE your skin is exposed. As mentioned, when you are out on the water the sun can attack you from above and below as the rays reflect off the mirror like surface of the water. These rays bounce back onto you so your exposure can be multiplied compared to on land.  
  • Re-application: Re-apply every two hours, or more frequently if swimming or sweating, don’t just go off feel. Often when you’re out on the water the sea breezes and odd cloud make it feel like you aren’t getting burnt but UV rays don’t blow away so even though it may seem like the sun is cooler, the effect is still the same.

3. Stay hydrated:

  • Adequate water intake: Drink water regularly, even if you don’t feel thirsty, to prevent dehydration. On the water, the cooling effect of sea breezes can mask early signs of dehydration, making it easier to overlook the need for hydration. Keep a supply of fresh water readily available on board and encourage everyone to drink small amounts frequently, especially during long days under the sun. It’s amazing how much fluid you can lose through perspiration in a couple hours under the sun.
  • Avoid alcohol and caffeine and choose electrolyte-based: Drinks with alcohol or caffeine can contribute to dehydration due to their diuretic effects, which increase fluid loss. While a cold beer might seem appealing on a hot day, alcohol can impair judgment and coordination - both critical when managing a boat. Instead, stock the cooler with water or electrolyte-replenishing drinks to maintain hydration and electrolytes you lose through sweat, and to ensure everyone stays sharp and safe on the water.

4.  Create shaded areas

  • Install Bimini tops or sunshades: Equip your boat with fixed shade options such as Bimini tops or retractable sunshades to offer a reliable escape from the harsh sun. These not only provide comfort for passengers but also protect sensitive equipment, such as navigation electronics, from overheating or UV damage.
  • Use umbrellas or tarps: For smaller boats or as a temporary measure, umbrellas or tarps can be used to create improvised shaded areas when at anchor or fishing. Secure them properly to prevent them from being dislodged by wind, waves or while you are underway, which could pose a hazard on deck.

5.  Plan activities during cooler parts of the day

  • Morning and late afternoon: Schedule your boating adventures during these cooler periods to avoid the peak UV index and intense midday heat. Early mornings often provide calmer waters, making them ideal for fishing or cruising, while late afternoons offer stunning sunset views with milder conditions. By avoiding the hottest part of the day, you also reduce the risk of heat-related illnesses and sunburn for passengers.

6.  Monitor weather conditions

  • Stay informed: Use marine weather forecasting apps such as the Coastguard app, Metservice, Windy & Predict Wind and VHF Nowcasting updates to stay on top of conditions like wind changes, currents, temperature spikes and UX indexes. On the water, weather can shift quickly and staying informed ensures you can adapt to avoid potentially hazardous situations.
  • Be prepared to adjust plans: If severe weather or temperature extremes are forecasted, consider delaying your trip or altering your route to a safer area. For example, in case of strong winds or unexpected storms, head to a sheltered bay or marina to wait it out. Flexibility is key to keeping everyone safe and comfortable while boating.

It's essential to respect the sun and heat to ensure a safe experience on and off the water and avoid looking like a prawn this summer. Make sure you stay informed, prepared, and vigilant of the weather and UV index this summer and gear up accordingly.