While seasons can vary significantly from island to island, the diving around Kona is good pretty much every day of the year. However, because the water does get a bit colder and the surface becomes choppy during the winter months, it is said that the best time to dive in Hawaii is from April to October. Within the suggested months, you’ll find warm enough water temperatures between 78 and 81°F (25 to 27°C). This means you’ll only need to pack a 3mm wetsuit or shorty. You’ll also enjoy visibility of between 75 and 100 feet (22 and 30 meters). And, surface conditions are at their calmest, allowing liveaboards to reach all of the area’s dive sites. You can even enjoy some shore diving before or after your trip. On the other hand, November to March are the best months for spotting humpback whales off the coast of Hawaii. In addition, September and January are the least busy months for scuba divers. So, if you like to dive from liveaboards that aren’t full, we suggest going in either of these months. Finally, the air temperature remains fairly steady throughout the year, although the winter months can be slightly chillier. The thermometer generally reads between 75 and 90°F (24 and 32°C).