A night swim in Hawaii is hard to beat. The trade winds have cooled things off, the stars are out, and the water’s still warm from the afternoon sun. For a lot of my clients across East Honolulu, from Hawaii Kai to Diamond Head, evening pool time is the best part of the day.
I’m Paul Costello, and I’ve been maintaining residential pools in East Honolulu since 2000. I’ve helped a lot of homeowners set their pools up for evening use. Getting a pool from “usable after dark” to somewhere you actually want to be at night takes some prep, and most of it is easier and cheaper than you’d think.
Here’s how to get your pool ready for night swimming.
Why Night Swimming Is So Popular in Hawaii
Our climate lets you use the pool in the evening all year, which most mainland homeowners can’t do. Even in January, nights in East Honolulu rarely drop below the mid-60s. Add a heater and you can swim comfortably 365 days a year.
Night swimming has other things going for it too:
- No UV, so no sunscreen and no sunburn
- Cooler air, which feels great after a hot, still Kona day
- Privacy, with fewer neighbors out and a quieter yard
- A way to unwind by floating under the stars after work
- More use out of the pool, since you can swim day and night
For busy families, evenings are often the only time anyone gets in the pool during the week. Setting it up for night use means you actually use the pool you’re paying to maintain.
Pool Lighting: The Foundation of Every Night Swim
Lighting matters more than anything else for night swimming. Without enough light, an evening swim gets dangerous. You need to clearly see the pool bottom, the deck edges, and the water surface.
Underwater LED Lights
The upgrade that makes the biggest difference. Modern LED pool lights are bright, come in color-changing versions, and last 20,000-30,000 hours. They need professional installation.
Deck & Pathway Lights
Low-profile fixtures along the deck and walkways keep people from tripping and slipping on wet surfaces. Solar-powered versions skip the wiring cost entirely.
Floating Solar Lights
A cheap decorative option that charges during the day and glows at night. Nice to look at, but not enough light on their own.
Landscape Lighting
Uplights on the palms, accent lights in the garden beds, and string lights across the lanai make the whole pool area feel like a resort.
What to Prioritize
If you’re starting from nothing, this is the order I give my clients:
- Underwater pool lights first. This is for safety, not looks. You need to see the bottom of the pool.
- Deck edge lighting second. It keeps people from tripping and slipping on wet surfaces, especially older family members.
- Pathway lights third. Light the way from the house to the pool.
- Decorative lighting last. The fun stuff that sets the mood.
Hawaii electricity costs matter: With some of the highest electricity rates in the country (around $0.35-$0.45/kWh), LED pool lights are close to a must here. A single LED pool light uses about 40 watts, compared with 300-500 watts for an incandescent. Over a year of nightly use, that's hundreds of dollars off your HECO bill. For more ways to cut your pool's electricity costs, see my tips to save money on your pool.
LED Color-Changing Lights
Modern LED pool lights can cycle through blues, greens, purples, and more. It might sound gimmicky, but clients have told me this one upgrade made their pool feel like a different place at night. Many models let you control them from your phone.
Color-changing LEDs cost only a little more than plain white ones. If you’re already buying new pool lights, get the color version. Our pool LED lighting upgrade guide covers fixture choice and installation costs. LED lighting is also one of the easiest eco-friendly pool upgrades you can make.
Heating Your Pool for Evening Comfort
Even in Hawaii, the air at night can be 15-20 degrees cooler than the afternoon high. Combine that with the heat a pool gives off after sunset, and an unheated pool can feel chilly at night, especially for kids and older swimmers.
Most Popular in Hawaii
Lowest Operating Cost
For night swimming, a heat pump is usually the better pick. Solar works great during the day, but it can’t add heat once the sun’s down. A heat pump holds your temperature no matter what time it is.
My Recommendation
If you swim at night regularly, set the heat pump to hold 80-82°F. Keeping it there uses less energy (and is easier on the equipment) than heating from cold every time. Put a pool cover on during the day to hold in the sun’s heat, and you can cut the heater’s workload by up to 60%.
For more on heater options, see our guide on why you should consider a pool heater.
Insect Control Around Your Pool
Mainland pool guides get this one wrong for Hawaii. We have mosquitoes all year, not just in summer, and pool lights at night draw bugs in.
Here’s what works poolside:
Spread them around the pool instead of bunching them in one spot. The smoke makes a barrier mosquitoes avoid, and tiki torches look good out there too.
Put these in the landscaping around the pool for a natural repellent that's always working. They grow well here and look nice around a pool.
Mosquitoes breed in still water. Check plant saucers, gutters, birdbaths, and anything else that holds rainwater within 50 feet of the pool.
Mosquitoes are weak flyers. A couple of oscillating fans on the deck move enough air to keep them off you, and the breeze feels good on a warm night.
Put them 15-20 feet from the pool so they pull bugs away from the water, not toward it. Never hang one right over the pool.
What doesn’t work well poolside: Spray repellents wash right off in the water and can throw off your pool chemistry. Keep DEET products especially away from the pool. Stick with the methods above.
For which plants to use (and avoid) around a pool, see our guide on swimming pool landscaping.
Safety Essentials for Night Swimming
Swimming at night carries risks that daytime swimming doesn’t. It’s harder to see, harder to notice someone in trouble, and easier to slip on a wet deck. Here’s how to cut those risks:
This is rule number one. Always have someone else there, in the water with you or watching from the deck. If something goes wrong in the dark, you need someone who can help right away or call for help. Let a family member or neighbor know when you're swimming.
From the deck, you should be able to see the whole pool bottom. If any part of the pool is in shadow, you need more light. That's how you spot someone in trouble. Check your lighting before your first night swim by standing at each corner of the deck and looking for dark spots.
Keep a reaching pole, a ring buoy, and a phone within arm's reach of the pool at all times. At night, know exactly where they are so you don't have to look. Glow-in-the-dark markers on the rescue gear help.
Low light messes with depth perception, and even strong swimmers misjudge distance at night. Feet-first entries only, for everyone, adults included. When clients tell me about someone getting hurt in the pool at night, it usually involved a dive.
A poolside camera adds another layer of safety. It watches for anyone getting in who shouldn't (important if you have kids), records anything that happens, and lets a friend or neighbor watch a live feed if you're swimming alone. Many systems send motion alerts to your phone.
Alcohol and night swimming don't mix. It gets its own callout because alcohol is a major factor in adult drownings. It throws off your balance, coordination, and judgment, and the dark already makes all three harder. If you're hosting an evening pool party, set clear rules about drinking and swimming.
For more on keeping your pool area safe, read our guides on pool safety barriers, Hawaii pool fence laws, and pool pet safety guidelines.
Creating the Perfect Ambiance
Once lighting, heat, bugs, and safety are handled, you can make the space nice to be in. Hawaii does most of that for you, but a few touches help:
Sound
- A waterproof Bluetooth speaker playing something mellow or ocean sounds
- A water feature or fountain for some natural background noise
- Keep the volume low enough to hear people talking and any sounds from the water
Comfort
- Stack fresh towels in a waterproof bin near the pool
- Keep a robe or coverup close; you’ll cool off fast between swims
- Set up cushions and loungers so you can enjoy the pool even when you’re out of it
Refreshments
- A small bar cart or cooler with cold water, sparkling water, and non-alcoholic drinks
- Fresh mango, pineapple, or lilikoi makes a great poolside snack
- If you’re serving alcohol, pick someone who isn’t drinking to watch the water
The Hawaii Touch
- Tiki torches keep the bugs down and look the part
- Plumeria and pikake near the pool make the evening air smell great (plant them far enough back that the flowers don’t fall in)
- Turn off your phone. Seriously. A night swim is a chance to unplug
Pool Maintenance for Night Swimmers
If you’re in the pool most evenings, adjust your routine a little:
- Run your pump during the day so the filter cycle finishes before your swim and the water’s freshly circulated
- Skim before you swim. Two minutes with a leaf net gets out whatever landed during the day
- Check chemistry weekly. More swimming means more chemical demand, so stay on top of your pool chemistry
- Clean the pool lights. Calcium builds up on the lenses and dims them over time, so wipe them down during regular maintenance
- Keep an eye on the deck. Algae on a wet deck is a real slip hazard in the dark
If you’d rather spend your evenings swimming than testing and balancing, that’s what we’re here for. Our weekly pool maintenance service keeps your water clean, balanced, and ready for evening swims without any work on your end.
Frequently Asked Questions
Is it safe to swim at night?
Yes, if you take the right precautions. The basics are enough light to see the whole pool bottom, a swim buddy, rescue equipment within reach, and no diving. Skip the alcohol before and during, and make sure someone on the deck knows you're in the water.
How much does it cost to add LED lights to my pool?
Professional installation of an LED pool light usually runs $700-$1,500 per light, and most residential pools need 1-3 lights. The LEDs last 10-20 years, so they pay for themselves over time, especially compared with incandescent lights that burn out often and use 75-80% more electricity.
What temperature should my pool be for night swimming?
Most people find 80-82°F comfortable for night swimming. In Hawaii, an unheated pool usually sits around 76-80°F depending on the season and how much sun it's had lately. A heat pump can hold your target temperature for $50-$150 a month. Start heating 2-3 hours before you plan to swim.
How do I keep mosquitoes away from my pool at night?
Use a few methods together: citronella torches around the pool, outdoor fans to throw off their flight, lemongrass in the landscaping, and no standing water within 50 feet. Skip spray repellents near the pool, since they wash off in the water and affect your chemistry.
Do I need a pool cover if I swim at night?
A cover during the day holds in the sun's heat, so your heater works less and costs less to run. Take it off before your evening swim and put it back when you're done. Covers also cut evaporation, debris, and chemical loss, which saves you money there too.
Can I install pool lights myself?
Floating and solar decorative lights are easy to do yourself. Underwater pool lights and hardwired deck fixtures should always be installed by a licensed electrician. Pool electrical work puts water and high voltage together, and a bad install can electrocute someone.
Start with the Lights
A pool that’s set up for night use changes your evenings. A float by yourself after a long day, a family swim before bed, friends over under the stars: in Hawaii you can do all of it year-round.
Get the lighting right first and work down the list from there. You may find the pool turns into the room you use most, even without a roof.
Get Your Pool Night-Swim Ready
Every good night swim starts with clean water, balanced chemicals, and equipment that works. Let Koko Head Pool Service handle the maintenance so all you have to do is bring a towel. Serving Hawaii Kai, Diamond Head, and all of East Honolulu since 1995.
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