The 2026 Formula 1 season is set to be a challenging one, with safety concerns and new regulations causing a stir among teams. But there's another issue that could potentially be a game-changer: rain. While safety concerns have led to changes in starting procedures and energy harvesting limits, the real worry is how the new cars will perform in wet conditions. With very few teams having engaged in meaningful running in low-grip conditions, the lack of data is a significant concern. The three-day tests in Bahrain and Barcelona were held in warm and sunny conditions, with only Red Bull and Ferrari opting to test in the rain. The new cars' behavior under acceleration and braking, especially in low-grip conditions, is a major concern. With nearly 50% of power delivery coming from electrical motors, the cars' deceleration will be heavily reliant on these motors, rather than conventional braking. This could lead to expensive results if the electrical motor is set in too 'greedy' a mode for maximum harvesting, as its interventions will be more abrupt and come at the cost of stability. However, testing in wet conditions is challenging, and the results could be costly. The purpose of the test is to help Pirelli improve the usefulness of its wet-weather offerings, rather than to help acclimatize drivers to the effects of electrical deployment and harvesting in low-grip conditions. With the new regulations and the lack of data, the 2026 season is set to be an exciting and challenging one, with rain potentially being a game-changer.