Power over Ethernet (PoE) cameras are a fantastic choice for home security, business surveillance, or monitoring outdoor spaces. They’re convenient, combining power and data over a single cable, but when installed outdoors or in damp environments, they face a sneaky enemy: water damage. Moisture can seep into the camera ethernet coupler housing, corroding connectors and short-circuit electronics, leading to costly repairs or replacements.
Fortunately, with the right precautions, you can keep your PoE cameras safe and operational, rain or shine. Here’s how to protect them effectively!
1. Choosing the right Weatherproof Cameras
The first line of defense is selecting the right equipment. When shopping for PoE cameras, check their Ingress Protection (IP) rating—a two-digit code that indicates resistance to dust and water. For outdoor use, look for at least an IP66 rating, the higher the better. Any less than this rating is not advised to use the camera outdoors.
Here's an official IP Rating chart from the IEC:
Fortunately all of Montavue's Fixed Lens, Varifocal, and PTZ cameras are at least IP66 and IP67 rated weatherproof!
2. Install Under Shelter Where Possible
Even with a solid IP rating, reducing direct exposure to water extends your camera’s lifespan. Mount PoE cameras under eaves, awnings, or overhangs to shield them from rain, snow, and ice. This also helps with lens clarity—fewer water droplets mean less obstruction on the footage. If shelter isn’t an option, consider adding a security camera hood or visor, you can find generic ones on Amazon or Ebay that mount right above the camera.
3. Seal and Protect Connections Properly
Water doesn’t just target the camera itself—it loves sneaking into cable connections as well. PoE cameras rely on Ethernet cables for power and data connection, and these are very vulnerable spots.
Here are some ways to lock out water, moisture and humidity:
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Dielectric Grease: At a bare minimum, we strongly recommend using dielectric grease in your ethernet connections to your outdoor cameras. If you live in an extremely humid climate like Florida or Louisiana, apply the grease to all of your cameras ethernet connections, indoor and outdoor. Most security camera companies including Montavue do not and will not cover ethernet (RJ45) water damage under warranty as it is considered user error. Dielectric Grease is pretty affordable and you only need to apply a little in the cameras ethernet port.
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Waterproof RJ45 couplers: These enclose the connection point in a sealed housing. Not all couplers are equal, often times couplers that come with new cameras are not completely waterproof, and in that case you definitely want dielectric grease and a junction box!
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Keeping cable connections inside: If possible you can run ethernet cable from outdoor cameras in through your walls keeping them completely out of reach of rain. This is not a bad option for most homes with easily drillable walls. If you have brick or concrete walls you will definitely need a junction box.
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Weatherproof junction boxes: If you can't drill a large enough hole for the entire ethernet plug or cant drill a hole at all, a junction box is a great option for storing the ethernet connection. You can also run conduit to the junction boxes if you have to run the ethernet from the outside, or in applications where cameras are on a pole.
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Apply silicone sealant: For extra protection, dab weatherproof silicone around the edges of junction boxes or other visibly open spaces water could get into.
4. Elevate and Angle Cables Downward
Water follows gravity, so use that to your advantage. Run Ethernet cables downward from the camera to prevent water from flowing toward the connection point. Avoid low spots where puddles form, and if the camera’s near the ground, elevate it on a pole or mount. A simple drip loop—leaving a U-shaped dip in the cable before it enters a building or junction box—stops water from tracking along the line.
5. Regular Maintenance Checks
Prevention is great, but vigilance keeps things running. Inspect your PoE cameras every few months, especially after storms:
- Look for cracks or wear: Check the housing for damage that could let water in.
- Clean the lens: Remove dirt or water spots that obscure the view.
- Test seals: Ensure gaskets, O-rings, and connection covers are intact.
If you spot condensation inside the lens or housing, act fast—open it (if safe), dry it out, and reseal with fresh silicone or replace damaged seals.
6. Add Desiccants for Humid Climates
In areas with high humidity, water damage isn’t always from rain—it’s from moisture buildup inside the camera. Slip a small silica gel packet (like the ones from shoe boxes) into the housing during installation. These desiccants absorb ambient moisture, preventing fogging or corrosion. Replace them during maintenance checks to keep them effective. Brand new cameras out of the box usually will come with one already inside but it can still be beneficial to replace them every 4-5 years.
7. Avoid Submersion Unless Certified
Even with high IP ratings, most PoE cameras aren’t designed for prolonged submersion. If you’re installing near water features or flood zones, confirm the camera’s limits in the manual or specification sheets. For underwater use (like monitoring under a pond), you’ll need specialized equipment beyond typical PoE setups—don’t assume weatherproofing covers it.
8. Test Your Setup Before Finalizing
Once your PoE camera is installed, it’s smart to confirm it’s water-ready before a real storm hits. Avoid risky methods like blasting it with a hose—there are gentler ways to test:
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Use a spray bottle: Lightly mist the camera and connections with water to mimic rain. This gives you control over the amount and avoids overwhelming seals.
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Simulate drizzle with a damp cloth: Wipe a wet cloth over the housing and cable entry points to check for leaks without soaking the system.
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Wait for natural rain: If weather’s on the way, let Mother Nature do the work. After a light rain, inspect the camera for moisture and test its functionality.
After testing, check for water inside the housing, foggy lenses, or power issues. Monitor the live feed for glitches. If everything holds up, you’re good to go—no high-pressure water needed!
Final Thoughts
Protecting PoE cameras from water damage boils down to smart choices and proactive care. Start with weatherproof gear, shield connections, and keep an eye on wear and tear. With these steps, your cameras will stand up to the elements, delivering clear footage no matter the forecast.
