Why this is worth its own guide
Given how expensive dining out in Hawaiʻi can run — see our budget breakdown — happy hour is a genuinely meaningful cost lever, not just a nice-to-have. Many of the state's best pupus (appetizers) are also, not coincidentally, happy-hour staples: poke, edamame, spam musubi, and various fried bites built for sharing over a drink.
Oʻahu: Waikīkī's oceanfront bars
House Without a Key (at Halekulani — see our full review) and Duke's Waikiki (at Outrigger Waikīkī — see our full review) both run genuinely good, reasonably priced happy hours despite sitting inside upscale hotels, with live music and direct beach or sunset views — a real value relative to the surrounding neighborhood's overall prices.
Maui: Kihei and Lahaina's casual scene
Kihei in particular has a dense strip of casual, often oceanfront restaurants with reliable daily happy hours — a noticeably better value zone than the more upscale Wailea resort corridor covered in our Maui areas guide.
Hawaiʻi Island: Kailua-Kona's waterfront
Aliʻi Drive, running along the Kona waterfront, has a cluster of casual restaurants and bars with sunset-hour specials — a good, walkable way to end a day based on the Kona/Kohala side without resort pricing.
Kauaʻi: fewer options, still worth planning around
Kauaʻi's smaller-town character (see our Kauaʻi areas guide) means fewer dedicated happy-hour spots than the busier islands, but Poʻipū and Kapaʻa both have reliable casual options — worth checking current hours directly, since Kauaʻi's overall earlier closing times apply here too.