Escaping the Scorching Sands: How to Get Past The Heat Barrier in Subnautica 2

If you travel roughly 250 meters away from your starting Lifepod, you will encounter a starkly different environment in Subnautica 2. This new biome resembles an underwater desert, but it is far from inviting. While the allure of exploration is strong, a PDA warning will urgently instruct you to stop immediately. This area is governed by an extremely high temperature, triggering a critical heat warning the moment you get too close.

With map space being so limited in the early access version of Subnautica 2, you will inevitably want to equip the right gear to explore these scorching depths. Below is everything you need to know to survive the thermal hazard and secure the necessary equipment.

Understanding the Thermal Threat

To survive this biome, you must first understand the mechanics of heat damage in Subnautica 2. Normally, the waters surrounding your initial Lifepod are a comfortable 20 degrees Celsius. However, as you approach the hotter biome, the environment changes drastically.

You will see a red half-circle indicator on your HUD, with a temperature reading that ranges from 30 to 80 degrees. Here is how the thermal damage works:

  • Baseline Tolerance: By default, your character can withstand temperatures up to 80 degrees without taking direct damage.
  • Early Warning Zone: Even at temperatures between 30 and 70 degrees, you will begin to take damage the longer you remain in these hotter waters.
  • Critical Threshold: As you near the 80-degree mark, the damage accelerates rapidly, making prolonged exposure fatal without protection.

Equipping for the Heat

To get past the heat barrier and explore this underwater desert safely, you cannot rely on standard diving gear. The temperature differential between the safe zone and the desert biome is too great. You will need to craft and install specific thermal protection suits and upgrade your PDA to track thermal readings accurately.

Without the proper gear, the heat warning will not just be a nuisance; it will be a death sentence. Ensure you have the necessary resources to craft heat-resistant equipment before venturing deeper into the red zone. Only with the right thermal protection can you ignore the PDA’s warning and truly explore the secrets hidden within Subnautica 2's scorching sands.