Tempest Weather System by WeatherFlow Overview

Name: Tempest Weather System by WeatherFlow
Brand: Tempest

All-in-one ultrasonic station with built-in lightning detection

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Tempest Weather System outdoor sensor by WeatherFlow

tempest Tempest Best Smart Home

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The Tempest is an all-in-one outdoor unit with ultrasonic wind, haptic rain, and integrated lightning detection. WeatherFlow documents local UDP and WebSocket APIs plus smart irrigation integrations such as Rachio.

Specifications and compatibility notes are based on manufacturer documentation — not independent Atmosiva testing.

Known limitations

•Amazon bundle ASIN B0868WY7NY is the standard Tempest station listing — mount kits may use different ASINs

Pros

+ Single outdoor unit with no moving wind or rain parts (per WeatherFlow specs)
+ Built-in lightning detection documented by WeatherFlow
+ Local UDP and WebSocket APIs for smart home use
+ Documented Rachio integration and no subscription for core data

Cons

− No physical countertop console included
− Fixed sensor suite — no modular external soil probes
− Rain calibration uses WeatherFlow RainCheck (cloud-assisted per documentation)
− Hub is Wi-Fi only — no Ethernet port

Technical Specifications

Wind Sensor

Ultrasonic array (0–90 mph per WeatherFlow spec)

Rain Gauge

Piezoelectric haptic sensor with RainCheck calibration

Temp / Humidity

±0.4°F (±0.2°C), ±2% RH (per WeatherFlow spec)

Connectivity

Wi-Fi hub; local UDP broadcast and WebSocket API documented by WeatherFlow

Smart Home

Home Assistant, Alexa, Google, IFTTT, Rachio, Apple Shortcuts

Power Source

Integrated solar panels with internal LTO battery

Update Frequency

~3 s wind updates (per WeatherFlow documentation)

Compatibility & Integrations

Sensor Capabilities

Temperature Humidity Wind Rainfall Pressure Lightning UV

Ultrasonic wind, haptic rain, lightning, light/UV, temp, humidity, pressure

Smart Home

Home Assistant: Yes
Weather Underground: Yes
Alexa: Yes
Rachio: Yes
API Support: Yes

Home Assistant, Alexa, Google, IFTTT, Rachio, Apple Shortcuts

Connectivity

Wi-Fi: Yes
Ethernet: No
Bluetooth: No
Local Data: Yes
Cloud Required: No
Subscription Required: No

At a glance

Best For

All-in-one installs, lightning alerts, Rachio irrigation sync, local UDP consumers

• Ultrasonic wind and haptic rain in one housing
• Lightning detection with app alerts
• Solar-powered with internal battery (per WeatherFlow specs)
• Local UDP broadcast for Home Assistant

Related Comparisons

Head-to-Head Comparison September 2026

Ecowitt WS90

Tempest Weather

Ecowitt WS90 vs Tempest: Modular Gateway vs All-in-One Smart Home

Ecowitt WS90 with a GW2000/GW3000 gateway fits buyers who want documented local Home Assistant integrations and modular add-on sensors such as soil moisture probes. Tempest fits buyers who want a single outdoor unit with built-in lightning detection and documented Rachio smart irrigation integration.

Feature comparison Read comparison