Can you buy a smart lock that never connects to the internet?

Yes, and for a lot of households it is the better purchase. A keypad deadbolt with no radio at all gives you keyless entry, guest codes and a physical key backup, runs 12 to 24 months on a set of batteries, and has no app, no account and no cloud service to be discontinued. Bluetooth-only locks sit one step up, adding phone unlocking and code management from the app when you are near the door but still nothing remote.

Will my guest codes still work during an outage?

Codes already programmed into the lock will work, because they live in the lock memory. What stops is changing them. If you need to issue a new code to a cleaner or a guest during an outage, you cannot do it from the app, and on most locks the workaround is to add the code at the keypad using the master or programming code from the manual. Find that code and write it down somewhere now, because looking for the manual in an outage is a bad time to start.

Does the lock still lock itself automatically?

Yes on most models, because auto-lock is a timer running on the lock rather than a cloud routine. Auto-unlock is different: it depends on geofencing, which needs your phone to have a data connection to know it has crossed the boundary, so it usually fails during an outage. Anything described as a routine or automation in a smart home app — lock at 10 pm, lock when the alarm arms — may or may not survive, depending on whether the hub runs it locally.

What about a power cut rather than an internet outage?

The lock is unaffected, because it runs on its own batteries rather than house power. Your router and any hub will go down, so you lose remote access exactly as in an internet outage, but the keypad, Bluetooth and key all work normally. This is one genuine advantage of a battery-powered lock over a hardwired access control system, and it is worth remembering during storm season when the power is the thing most likely to fail.

Which connection type is most resilient?

A lock with a physical key cylinder and a keypad, whatever radio it uses. Resilience comes from having credentials that need no network and no phone, not from the protocol. Among the radios, hub-based systems such as Z-Wave and Zigbee keep working inside the house during an internet outage because the hub talks to the lock directly, so local automations and in-home app control survive when a Wi-Fi lock has already dropped offline.

Do Smart Locks Work Without Wi-Fi? (Yes

Written & researched by Derek Holt Home & Appliances Editor

Updated October 2026

Wide view of a person mounting a small camera beside a front door, in soft overcast light

Affiliate Disclosure

Some links on this page are affiliate links. As an Amazon Associate, we earn from qualifying purchases — at no extra cost to you. We do not buy, test, or physically handle the products we cover; our rankings come from aggregated owner reviews, ratings and expert consensus. Commissions never change our verdicts. How we rank · full disclosure.

Yes. Every reputable smart lock keeps working without Wi-Fi, because credentials are verified on the lock itself rather than in the cloud. Keypad codes, paired Bluetooth phones, fingerprints and the physical key all continue to open the door during an internet outage, and auto-lock timers keep running. What you lose is everything that needs a network: remote unlock from away, push notifications, remote code changes, activity history syncing and voice assistant control. The lock does not fail secure or fail open — it simply becomes a very good keypad deadbolt until the connection returns.

What keeps working and what stops?

The dividing line is whether the function needs to reach a server. Anything decided at the door survives; anything decided elsewhere does not.

Function	Wi-Fi down	Why
Keypad code entry	Works	Codes stored in the lock
Physical key	Works	Purely mechanical
Bluetooth phone unlock	Works	Direct radio link, no internet in the path
Fingerprint reader	Works	Template stored on the lock
Auto-lock after a delay	Works	Timer runs on the lock
Remote unlock from away	Fails	Needs a cloud path
Push notifications	Fails	Nothing to send them through
Adding or deleting codes in the app	Fails	Can usually be done at the keypad instead
Auto-unlock on approach	Usually fails	Geofencing needs phone data
Voice assistant commands	Fails	Assistants are cloud services

Low-angle view of a person mounting a small camera beside a front door, in soft early-morning light

Why is the code checked on the lock rather than in the cloud?

Because a lock that asks a server for permission would be unusable. Every second of latency is a second standing at the door, and any server outage anywhere in the chain would lock people out of their own houses. So the design is consistent across the category: codes and paired credentials are written into the lock module, and the radio exists to report what happened afterward and to accept new codes when it can.

This is also why the radio type matters less than people expect for reliability. A Z-Wave or Zigbee lock paired to a hub stays fully controllable from inside the house during an internet outage, because the hub speaks to the lock directly over its own mesh — remote access from outside is what breaks. A Wi-Fi lock loses even in-house app control once the router is down. The mechanics of all this are covered in how smart locks work.

Wide view of a person mounting a small camera beside a front door, in warm late-afternoon light

What should you set up before an outage happens?

Four things, each of which takes five minutes and none of which can be done once the network is already down.

Program at least one keypad code you have memorized and do not rely on phone unlocking alone. A code needs no battery in your pocket and no signal.
Find the master or programming code in the manual and store it somewhere you can reach without the internet. This is what lets you add a code at the keypad when the app is unavailable.
Know your dead-battery override — a key cylinder, external 9V contacts, or a USB-C jump port. Battery life expectations are in how long smart lock batteries last.
Keep a physical key off the property, with a neighbor or in a car, rather than under a mat.

If remote access is not something you actually use, consider skipping the connected lock entirely — a keypad deadbolt gives most of the benefit with none of the account, and we compare the two in smart lock vs keypad lock. For households that do want remote control, the models owners rate highest for offline reliability and clear override methods are in our smart lock picks, with the rental-specific considerations in best smart lock for Airbnb.

We never buy, install or physically handle the products we rank. Every recommendation comes from aggregated owner reviews, star ratings, review volume and published expert consensus — see how we rank.

Do Smart Locks Work Without Wi-Fi?

Affiliate Disclosure

What keeps working and what stops?

Why is the code checked on the lock rather than in the cloud?

What should you set up before an outage happens?

Frequently Asked