When will Thermio ship?

We’ve validated core sensors and are entering beta trail testing in April 2026. Waitlist members get timeline updates and early access invites first.

What does joining the waitlist commit me to?

Nothing. No payment, no obligation. You’ll get product updates and first access to early inventory at 20% off.

BEYOND THE FORECAST

Ultralight trail sensor

Real temperature, humidity, and pressure — measured where you are.

Get 20% off + early access

Get launch updates, beta invites, and early access.

500+ hikers joinedCold-tested to −18°C9 g / 6 gLaunch discount: 20% off

Thermio clip-on trail sensor showing temperature on the reflective display

The forecast said 8 °C. On the ridge, it was −2. Weather stations sit in valleys — your trail doesn’t.

Forecasts guess. Watches overheat. Thermio measures.

The forecast

Based on valley stations, not your ridge.

The watch

Reads your 37 °C skin, not the air.

Thermio

Clips to your pack. Reads real conditions.

What Thermio helps you decide

Whether your sleeping bag stays dry

Dew point predicts condensation before it soaks your kit.

When weather is turning

Watch pressure trends where you are — before the forecast catches up.

What camp was actually like

Review real overnight lows and humidity from your exact site, not the town forecast.

Field-tested, not just imagined

Nov 2025 — Prototype weight confirmed: 9 g

Dec 2025 — Overnight lows — tracking temperature through the night

Jan 2026 — Winter alpine test — freezing temperatures

Two sensors. One mission.

Thermio with a sunlight-readable display, or Thermio Mini for ultralight kits. Both connect to the companion app.

Thermio

With display

Sunlight-readable display for instant readings. Full graphs and exports in the app.

Sunlight-readable display for live readings
On-device min/max and live temperature, humidity, and pressure
Syncs to companion app via Bluetooth
Dew point and wet-bulb temperature calculated automatically
9 g target weight

Thermio Mini

Ultralight

All data in the app. Just 6 grams on your pack.

No display — all data via companion app
6 g target weight
Dew point and wet-bulb temperature calculated automatically
CR2016 coin cell battery
Syncs to companion app via Bluetooth

Waitlist members get 20% off at launch.

Every reading. Every trend. One app.

The Thermio companion app connects to your sensor via Bluetooth, so you can check live readings and review trends from your trip.

Live ambient readings — temperature, humidity, and pressure from your sensor
Graphs and trends — 7 days of history in one place
Dew point and wet-bulb — automatically calculated from sensor data

Thermio companion app showing sensor readings and historical graphs

FAQ

Phones pull forecasts from distant weather stations — not your actual location. Watches measure skin temperature, not ambient air. Thermio clips to your pack and reads the conditions right where you are.

Get early access to Thermio

Join the waitlist for 20% off, beta invites, and early access.