The best time to visit Hawaii Volcanoes National Park is in the late afternoon (around 4:00 PM), staying through the evening. Arriving in the late afternoon allows you to explore the park's daytime highlights—such as the Thurston Lava Tube (Nāhuku) and the Chain of Craters Road—while the sun is still up, providing better visibility for hiking. As the sun sets, the park undergoes a dramatic transformation. This is the optimal time for stargazing and viewing volcanic activity. If the Kīlauea volcano is actively erupting, the glow of the lava against the dark night sky is only visible after dusk. Viewing the red glow from the Kīlauea Overlook or the Devastation Trail is a bucket-list experience that is completely lost during the daylight hours. Furthermore, visiting in the evening helps you avoid the heaviest crowds and the midday heat, though you should bring layers, as the temperature at the 4,000-foot summit can drop significantly once the sun goes down. Always check the official NPS "Current Conditions" page before you go, as volcanic activity and gas levels (VOG) can change the best viewing locations daily.