Best Outdoor String Light Dimmers and Timers
String lights do most of their work at dusk, and if you have to walk outside to plug them in every evening, you will eventually stop bothering. A good timer or dimmer fixes that completely.
The options range from a $14 mechanical outlet timer that clicks on at sunset to a $25 WiFi smart plug you can control from your couch. Neither is wrong. It depends on how much automation you actually want and whether your patio is near your router.
These five picks cover the full spectrum: dumb-but-reliable mechanical timers, inline dimmers designed specifically for string light voltage, and app-enabled smart plugs that tie into Alexa or Google Home. All of them are weather-rated for outdoor use.
Best Smart Plug for String Lights
The Kasa Smart WiFi Outdoor Plug EP40 has two independently controlled outlets, which sounds like overkill until you realize you can run your string lights on one and a pathway lamp on the other, all from one wall block. It connects over 2.4GHz WiFi without a separate hub and shows up in both the Kasa app and your Alexa or Google Home routines instantly.
Where it earns its keep is the scheduling. You set sunrise and sunset times once and it adjusts automatically as the seasons shift. If you are hosting dinner on a Friday and want the lights on at 6pm instead of 7:30pm, you open the app and change it in about ten seconds. The outlet housing is IP64-rated, meaning it handles rain and humidity without issue on a covered porch or pergola.
For a 10x10 or 12x12 patio setup running 48-foot LED string lights, this is the plug most people should buy first. It costs around $22 and has been around long enough that the app is genuinely stable.
Kasa Smart WiFi Outdoor Plug EP40
$22
89,400+ reviews
Dual-outlet smart plug with app control, sunrise/sunset scheduling, and Alexa and Google Home support, no hub required.
Shop on Amazon →Best Inline Dimmer for String Lights
Most smart plugs let you turn string lights on and off, but they do not dim them. If you want actual brightness control, you need an inline dimmer, a small unit that sits on the cord between your outlet and the first bulb strand. The DEWENWILS Outdoor Inline Dimmer handles up to 150 watts, which covers the vast majority of LED and incandescent globe string light setups.
The dial is smooth and gives you a full range from about 10 percent brightness up to 100. That low end is genuinely useful: on a smaller balcony or covered porch where you want candlelight ambiance rather than bright overhead illumination, you can dial it down to nearly a glow. The cord and housing are weatherproof, and the plug end fits any standard outdoor outlet.
This is the pick for anyone who already has a timer solution and just wants dimming on top of it. You can plug the DEWENWILS into a timed outlet and use the dial to set your preferred brightness, then let the timer handle the on and off. It runs around $24 and works on 120V string lights without any compatibility issues.
DEWENWILS Outdoor Inline Dimmer Switch 150W
$24
6,100+ reviews
Weatherproof inline cord dimmer rated for 150W, gives full brightness range for LED and incandescent outdoor string lights.
Shop on Amazon →Best Budget Timer for String Lights
If you do not want to deal with apps, WiFi, or any setup beyond plugging something in, the BN-LINK Outdoor Digital Timer is the right call. It has a simple push-button interface, a digital display, and lets you set up to eight on/off programs per week. Weatherproof housing, fits a standard outdoor outlet, done.
The countdown mode is underrated for entertaining. Say you want lights on for exactly four hours during a backyard dinner, regardless of what time things start. You hit the countdown button, set four hours, and it cuts off automatically. No app needed, no internet dependency, and it still works during a WiFi outage.
At around $14, this is the timer to buy for a rental property, a camper hookup, or anywhere you want reliable automation without committing to a smart home ecosystem. It handles up to 1875 watts, so you can run multiple strands daisy-chained off one outlet without overloading it.
BN-LINK Outdoor Digital Timer Plug 8-Program
$14
34,200+ reviews
Simple eight-program digital timer with countdown mode, handles up to 1875W, no WiFi or app required.
Shop on Amazon →Best App-Controlled Dimmer Smart Plug
The Treatlife Smart Dimmer Plug is one of the few products that combines actual dimming with WiFi smart plug functionality in a single outdoor-rated unit. You get brightness control through the Treatlife app, voice control through Alexa or Google Home, and scheduling, all without needing a separate inline dimmer.
It works well for covered patios and pergolas where you want to go from full brightness during dinner to a low ambient glow later in the evening without getting up. The app has a simple slider, and you can save scenes. If you already use smart home routines, it fits in cleanly. One routine at 9pm sets the lights to 40 percent automatically.
The outdoor rating is IPX4, so it handles splashing and rain but is not submersible. Plan for it to live in a covered outlet or under a pergola rather than fully exposed. It sells for around $25, which is a good deal given that you are getting both dimming and smart control in one plug.
Treatlife Smart Outdoor Dimmer Plug
$25
8,700+ reviews
WiFi smart plug with built-in dimmer control, app scheduling, and Alexa and Google Home compatibility in one outdoor-rated unit.
Shop on Amazon →Best Mechanical Timer for Zero-Fuss Control
The Woods 50015WD 24-Hour Outdoor Mechanical Timer is the timer your grandparents used to run their porch lights, and it still works better than anything that requires a firmware update. You twist the dial to set your on and off times using physical pins, plug it into your outdoor outlet, and that is genuinely the entire process.
There is no display to read, no buttons to mispress, and no pairing process. The pins snap into 15-minute increments around the dial, which is precise enough for string lights. For a front porch setup where you just want lights on at dusk and off at midnight every single night with zero intervention, this does the job.
It handles up to 1875 watts, fits any standard grounded outdoor outlet, and costs about $14. If you have older family members who rent your space or a vacation home where guests should not have to think about the lights, this is more reliable than any smart plug that depends on WiFi.
Woods 50015WD 24-Hour Outdoor Mechanical Timer
$14
21,500+ reviews
Simple dial-based mechanical outdoor timer with no app or WiFi required, reliable 15-minute increment control for any string light setup.
Shop on Amazon →Quick Tips for Outdoor String Light Timers and Dimmers
- LED strings dim better than incandescents. Most LED string lights work cleanly with phase-dimming controllers. Older incandescent strands can flicker at low brightness levels, so if you plan to dim, check that your bulbs are LED.
- Daisy-chain strands, not timers. Run all your string lights off a single timed outlet by connecting strands end-to-end. Stacking two timers in the same outlet rarely works reliably and can trip a GFCI.
- Use a GFCI outlet outdoors, always. Any outdoor plug running near a patio, deck, or garden area should be on a GFCI circuit. Most modern outdoor outlets already are, but older homes often are not.
- Sunset scheduling beats fixed times. Smart plugs with sunrise and sunset scheduling adjust automatically as days get shorter or longer. A fixed 7pm on-time will be wrong by 90 minutes between June and November.
- Check wattage before you stack strands. A single strand of 48-foot LED lights draws around 20 to 40 watts. Three strands daisy-chained is well under 150 watts, but if you are running incandescent bulbs, do the math before trusting a 150W-rated dimmer.
Frequently Asked Questions
Can you use a regular indoor dimmer for outdoor string lights?
No. Indoor dimmers are not weatherproof and can become a fire or shock hazard when exposed to moisture. Use an outdoor-rated inline dimmer or smart plug with an IP or weather rating listed on the packaging.
Do string light dimmers work with LED bulbs?
Most do, but not all. Look for a dimmer rated for LED loads, not just incandescent. The DEWENWILS inline dimmer and Treatlife smart dimmer plug both handle LED string lights without flickering.
What is the easiest outdoor timer for string lights with no tech setup?
The Woods 50015WD mechanical dial timer requires no app, no WiFi, and no display. Twist the pins to your on and off times and plug it in. It costs around $14 and has been reliably doing this job for decades.
Can I dim string lights with a smart plug?
Standard smart plugs like the Kasa EP40 only turn outlets on and off. For actual dimming, you need either an inline dimmer like the DEWENWILS or a smart plug with a built-in dimmer like the Treatlife model.
How far can outdoor string lights be from the WiFi router?
Most outdoor smart plugs connect on 2.4GHz WiFi, which has better range than 5GHz. A typical router covers 50 to 75 feet through walls. If your patio is far from your router, a mesh network node or a non-WiFi mechanical timer is a more reliable choice.