10 Best Wifi Pool Thermometers 2025 in the United States

The GoveeLife Smart Pool Thermometer is designed to help you keep a close eye on your pool or hot tub temperature from anywhere using its WiFi connection. It measures water temperatures between -4°F and 158°F with a good accuracy of about ±0.9°F, which is precise enough for most pool or spa needs. Thanks to the included WiFi gateway, you can monitor up to 10 sensors within about 328 feet, but note that obstacles can weaken the signal, so the gateway placement matters.

The device is waterproof with an IPX7 rating, meaning it can be safely submerged and won’t be damaged by water. It’s powered by two AAA batteries that can last from one to three years depending on usage settings, and you’ll get app and on-screen alerts when the battery runs low, which adds convenience. The app also allows you to view temperature data over 20 days and export records up to two years, great for tracking trends.

Installation is straightforward, with a tether and replaceable orange loop to keep the thermometer from floating away and easily visible. On the downside, it only works with 2.4GHz WiFi, so it won’t connect to 5GHz networks, and the signal might struggle through walls. While the plastic build is durable for water use, it may not withstand rough handling. This thermometer suits pool or hot tub owners wanting reliable, remote temperature monitoring with easy setup and decent battery life.

The GoveeLife Smart Pool Thermometer offers a comprehensive solution for monitoring pool temperatures with several standout features. With a temperature range of -40°F to 158°F (-20°C to 70°C) and an accuracy of ±0.5°C, it provides precise and reliable readings. The device refreshes every 2 seconds, ensuring up-to-date information. Its IPX7 waterproof rating ensures durability under water, and it can handle harsh weather conditions, making it suitable for various environments like swimming pools, hot tubs, and fish ponds. The connectivity range is impressive at up to 328 feet (100 meters), but it’s important to note that obstacles can reduce signal effectiveness.

The thermometer pairs with an app that supports real-time monitoring and notifications, enhancing its usability. The app also allows for data storage and export over two years, providing valuable historical data for users. The device operates on two AAA batteries, offering a battery life of up to one year in standard mode and three years in power-saving mode. Low battery notifications on both the device and the app ensure you’re never caught off guard. Installation is simple, aided by an included rope to prevent the thermometer from drifting.

However, the device only supports 2.4GHz Wi-Fi, which is a limitation to consider. The GoveeLife Smart Pool Thermometer is a robust and feature-rich option for anyone needing reliable and accurate temperature monitoring.

The Ambient Weather WH31PF Wireless Waterproof Floating Pool and Spa Thermometer is a versatile device designed for those who already own or plan to integrate it with specific Ambient Weather stations (WS-1550-IP, WS-2000, WS-2902B, WS-2902C, WS-3000, or WS-5000). It supports up to 8 channels, making it suitable for users needing multiple monitoring points. With a connectivity range of up to 300 feet under ideal conditions (100 feet under most conditions), it ensures stable communication with your weather station, updating temperature readings every 60 seconds for timely data. The RF 915 MHz sensor enhances this range and reliability.

Powered by a sealed internal, non-replaceable AA alkaline battery, the device minimizes maintenance but could be inconvenient if the battery needs replacement. Its durable, waterproof design ensures longevity and reliability in a pool or spa environment. However, users should note that the device's compatibility is limited to specific Ambient Weather stations, which could be a drawback for those not using these systems.

Installation is straightforward as the device floats on water, but care is needed when handling due to its hand-wash-only care instructions. The Ambient Weather WH31PF is a robust and reliable option for users with compatible weather stations, offering good connectivity and ease of use but with some limitations regarding battery life.