Fly Fishing Regulations in Hawaii: What Every Angler Needs to Know

Hawaii is one of the most unusual fishing destinations in the United States, and its regulations reflect that uniqueness in ways that will surprise anglers arriving from the mainland. The state splits its rules sharply between saltwater and freshwater — and fly fishing spans both environments, from bonefish flats on Oahu’s south shore to reservoir bass on Kauai.

Understanding fly fishing regulations in Hawaii before you wade in can save you from costly violations and help you make the most of limited public access. This guide walks through every major rule category, drawing directly from the Hawaii Division of Aquatic Resources (DAR) regulations booklet so you have a clear, accurate picture of what applies to your trip.

Important Note: The DAR regulations booklet is current as of May 2025 and is subject to change. Always verify rules with the official DLNR source before your trip, as this summary does not serve as a legal document.

Fly Fishing License Requirements in Hawaii

Hawaii’s licensing structure is unlike almost any other state in the country. For saltwater recreational fishing, Hawaii does not require a license — you can shore-fish, spear, throw-net, or boat-fish in ocean waters without a permit, which is highly unusual among US states. That means if you’re wading the bonefish flats or casting poppers off a rocky shoreline, no license is required as a resident or visitor.

Freshwater fly fishing is a different story. The Hawaii DLNR Division of Aquatic Resources requires a Freshwater Game Fishing License for anyone 9 or older fishing public freshwater on Kauai, Oahu, and the Big Island. An additional entry permit is also required for anyone planning to fish Wahiawā Reservoir from the public fishing area.

As of 2026, the fee schedule set by DLNR breaks down as follows: Resident annual: $6; Non-resident annual: $26; 30-day tourist license: $11; and a 7-day tourist license: $6. Seniors 65 and older and minors under 16 fish freshwater free.

Non-resident anglers heading into saltwater have their own requirement. Since May 2, 2024, the State of Hawaii has required non-resident anglers, 15 and older, to obtain a valid fishing license for recreational marine fishing. Hawaii residents with a valid Hawaii State ID or proof of address are exempt, as are active-duty military personnel along with their spouses and children.

You can purchase your freshwater license online or in person. Buy online through the DLNR ecommerce portal at dlnr.hawaii.gov, which issues an instant digital license you can show on your phone. In-person sales happen at DLNR Division of Aquatic Resources offices on Oahu (Honolulu), Kauai (Lihue), Maui (Wailuku), and Hawaii Island (Hilo and Kona). The license activates immediately and is valid through June 30 of the issuing year regardless of purchase date, so timing your purchase matters.

For more on what fish you can expect to target once licensed, see our guide to trout fishing season in Hawaii and our overview of bass fishing season in Hawaii.

What Counts as Fly Fishing Gear Under Hawaii Law

Hawaii does not define “fly fishing” as a separate gear category in its freshwater regulations — instead, it regulates the number of lines and hooks you may use. Understanding those limits tells you exactly what a fly rod setup can legally include.

At most public freshwater fishing areas, you may fish with hook-and-line with not more than one lure or baited hook or two artificial flies attached to a single line, provided that on weekends and holidays only one line may be used, and on weekdays other than holidays two lines may be used. A standard dry fly or nymph rig with a dropper is permitted under this rule, but adding a third fly would put you in violation.

At Wailua Reservoir Public Fishing Area on Kauai, the gear allowance is more restrictive. With a valid Freshwater Game Fishing License, you may fish using one pole and line, or one line with one lure or baited hook attached to the single line. You may also use a dip net up to two feet in longest axis, excluding the handle, to land hooked fish.

Landing nets are permitted in most freshwater areas. Attended traps and dip nets up to two feet long, wide, or high, excluding the handle, may be used to land hooked fish or to take certain baitfishes, provided that tucunare, bass, channel catfish and oscar shall not be used as bait.

On the saltwater side, fly fishing with a single hook and artificial fly is consistent with standard recreational gear rules. Saltwater rules are strict despite no license requirement. Bag limits, size limits, and seasons apply to species like ulua (giant trevally), oio (bonefish), moi, and akule. Snagging fish is explicitly prohibited statewide, so weighted rigs designed to foul-hook fish are off-limits regardless of water type.

Pro Tip: When fly fishing freshwater reservoirs on weekdays, you may use two lines — a useful option for tandem nymph rigs. On weekends and public holidays, drop to one line to stay compliant.

Fly Fishing Only Waters in Hawaii

Hawaii does not designate any waters as “fly fishing only” in the same way that states like Montana or Colorado do. There are no statewide fly-only stream reaches or reservoir sections reserved exclusively for artificial flies. This reflects Hawaii’s relatively small freshwater fishing footprint — only five natural lakes, all very small, occur in Hawaii, but 266 freshwater reservoirs ranging up to 400 surface acres in size have been created through impoundment of stream waters.

Various fish species from elsewhere in the world have been deliberately or accidentally introduced to Hawaii. High-quality game fishes such as largemouth bass, tucunare, and channel catfish are now widespread and well established in reservoir waters. Two game fishes, rainbow trout on Kauai and smallmouth bass on Oahu and Kauai, may be found in both streams and reservoirs.

For fly anglers, the most productive freshwater targets are the designated Public Fishing Areas (PFAs). Kauai’s Wailua Reservoir and the Big Island’s Wailoa River system offer the state’s best freshwater action. Rainbow trout can be found in the Koke’e region of Kauai, including Kokee State Park, where a put-and-take trout fishery operates seasonally.

On the saltwater side, the bonefish flats are where Hawaii’s fly fishing identity truly lives. For saltwater fly anglers, the bonefish flats of Molokai and Oahu’s south shore are bucket-list destinations. Fly fishing in Hawaii ranks highest on Molokai, Oahu, and Maui. Each island offers different terrain and techniques to catch bonefish.

Access to both freshwater and saltwater areas requires careful attention to land ownership. Many marine shoreline and freshwater areas of the State are private property, and permission of the landowner is required for access. A lot of reservoirs, stream banks, and stream beds can be privately owned unless clearly designated for public fishing.

If you fish other states with dedicated fly-only regulations, our guides to fly fishing regulations in Montana and fly fishing regulations in Colorado show how those systems compare.

Catch-and-Release Rules on Designated Waters in Hawaii

Hawaii mandates catch-and-release on specific waters and for specific species — and the rules are firm. At Wahiawā Public Fishing Area on Oahu, bass and tucunare (peacock bass) are strictly catch-and-release. Catch and release fishing only applies to bass and tucunare. It is unlawful to keep, retain, hold, or kill any bass or tucunare. Bass or tucunare brought to shore or on board a vessel must be returned to the water immediately.

The same rule applies at the Nu’uanu Freshwater Fish Refuge. The Nu’uanu Freshwater Fish Refuge includes the City and County of Honolulu’s Nu’uanu Reservoirs No. 2, 3, and 4, located between Honolulu and Kailua off the Pali Highway on O’ahu. You may not enter the refuge unless accompanied by an agent of, or with a permit issued by, the Board of Land and Natural Resources. Nu’uanu Reservoir No. 4 is closed to fishing entirely.

On saltwater, no statewide mandatory catch-and-release rule applies to bonefish (o’io), but size and bag limits do. The ethos among Hawaii’s saltwater fly fishing community strongly favors voluntary release of bonefish to protect the fishery — particularly given the limited number of productive flat systems across the islands.

Snagging is prohibited statewide across all water types, which reinforces the expectation that fish are hooked in the mouth through intentional presentation rather than foul-hooking methods.

Barbless Hook Requirements in Hawaii

Hawaii does not impose a statewide barbless hook requirement for freshwater or saltwater fishing. There is no rule in the DAR regulations booklet that mandates barbless hooks across all waters or species.

However, treble hooks are banned in some reservoirs, which is relevant for fly anglers who use articulated streamers or certain wet fly patterns tied on treble hooks. Before fishing any specific reservoir, check the site-specific rules in the current DAR regulations booklet to confirm hook-type restrictions at that location.

On the catch-and-release waters discussed above — particularly Wahiawā PFA — using barbless hooks is strongly recommended as a practical matter. Returning bass and tucunare to the water “immediately” is a legal requirement, and barbless hooks make that process faster and less harmful to the fish.

Pro Tip: Even where barbless hooks are not legally required, crimping your barbs on freshwater fly patterns is good practice in Hawaii. It speeds up releases on mandatory C&R waters and reduces handling stress on fish in warm reservoir conditions.

Size Limits, Bag Limits, and Slot Limits in Hawaii

Hawaii’s freshwater size and bag limits vary by species and by specific water body. The table below summarizes the key rules for introduced freshwater game fish most commonly targeted by fly anglers, based on DAR regulations current as of May 2025.

Species	Water Body	Minimum Size	Maximum Size	Bag Limit
Largemouth Bass	Wahiawā PFA (Oahu)	—	—	Catch & release only
Largemouth Bass	Wailua Reservoir PFA (Kauai)	9 inches	14 inches	2 (aggregate total: 3)
Tucunare (Peacock Bass)	Wahiawā PFA (Oahu)	—	—	Catch & release only
Oscar	Wahiawā PFA (Oahu)	—	—	1 per day

At Wailua Reservoir Public Fishing Area, the bag limit for largemouth bass is 2, with a minimum size of 9 inches total length and a maximum size of 14 inches total length. An aggregate total bag limit of 3 fish applies. This slot limit means fish between 9 and 14 inches may be kept, while larger fish must be released — an unusual provision that protects the reservoir’s trophy-class bass.

Where bag limits are specified, each licensee may take only one bag per day. The catch of a child below nine years of age will be considered part of the catch of the licensed supervising adult accompanying the child. A child under nine years of age who wishes to take a bag limit on their own must purchase a valid freshwater fishing license.

For saltwater fly fishing, bag limits, size limits, and seasons apply to species like ulua (giant trevally), oio (bonefish), moi, and akule. Species like ulua have a 10-inch minimum, oio has seasonal closures, and protected species like hawksbill turtles and monk seals are off-limits entirely. Always check the current DAR booklet for the specific island and species you plan to target, as limits can vary by management area.

For comparison with how other states structure freshwater bag limits, see our guides to fly fishing regulations in Oregon and fly fishing regulations in North Carolina.

Special Regulation Waters and Blue-Ribbon Fisheries in Hawaii

Hawaii does not use the term “blue-ribbon fishery” in its regulatory framework the way western states do. There is no official state designation comparable to Montana’s blue-ribbon streams or Colorado’s gold medal waters. Instead, Hawaii manages its most sensitive areas through a network of Marine Life Conservation Districts (MLCDs), Fishery Management Areas (FMAs), and Public Fishing Areas (PFAs) — each carrying its own set of restrictions.

Many Marine Life Conservation Districts (MLCDs) prohibit or limit fishing entirely, including Hanauma Bay (Oahu) and Molokini Shoal (Maui). Fishery Management Areas (FMAs) have additional gear and seasonal restrictions. Fly anglers targeting bonefish on the flats near these managed zones need to confirm the exact boundaries before wading in.

The Wailua Reservoir Public Fishing Area on Kauai functions as Hawaii’s closest equivalent to a designated quality fishery for freshwater fly anglers. The Wailua Reservoir Public Fishing Area is located off Kuamo’o Road approximately five miles mauka of Kūhi’ō Hwy, above the city of Wailua on Kaua’i. Its slot limit for largemouth bass and its aggregate daily bag limit of three fish reflect a management approach aimed at protecting fish populations while still allowing harvest.

The Waiākea Public Fishing Area on the Big Island is another key location. The Waiākea Public Fishing Area includes that portion of the Waiākea fish pond in the Wailoa River State Park in Hilo, south of the footbridge over Wailoa River, including the flood control channel and Mahohuli fish pond. State park rules apply alongside DAR fishing regulations at this site.

For saltwater fly fishing, the bonefish flats of Molokai stand out as Hawaii’s most productive specialized fishery. Molokai’s flats are huge and receive far less pressure than Oahu’s accessible south shore spots. Access to Molokai requires inter-island travel, but guides familiar with the tides and terrain can put you on fish consistently.

If you enjoy fishing regulated special-water systems in other states, our articles on fly fishing regulations in Michigan, fly fishing regulations in Georgia, fly fishing regulations in Tennessee, and fly fishing regulations in Indiana cover how those states manage their quality waters.

Where to Find Current Fly Fishing Regulations in Hawaii

The authoritative source for all Hawaii fishing regulations is the DLNR Division of Aquatic Resources regulations page. A PDF version of the May 2025 fishing regulations booklet can be downloaded from that page. This information is current as of May 2025 and subject to change.

The booklet is presented to acquaint sport and commercial fishermen with State laws and rules pertaining to fishing in Hawaii. It is not to be used as a legal document. Failure to include complete statutes or administrative rules in this summary does not relieve persons from abiding by those statutes and rules. Any discrepancies between this summary and the statutes or rules from which it was prepared will be enforced and adjudicated according to the official statutes and rules in effect on the date the activity took place.

For freshwater license purchases, you can use the official portal at Hawaii.gov’s freshwater fishing license page. Visit dlnr.hawaii.gov and use the DLNR ecommerce portal. The digital license is delivered instantly and works on your phone.

If you have questions that the booklet doesn’t answer, contact the nearest office of the Division of Aquatic Resources (DAR) or the Division of Conservation and Resources Enforcement (DOCARE). You can reach the Division of Aquatic Resources at (808) 587-0109 or by email at DLNR.aquatics@hawaii.gov.

For real-time, location-specific rules — including any area closures or temporary emergency rules — the eRegulations Hawaii fishing page provides a searchable digital version of the DAR rulebook organized by management area. The seasons and limits page on eRegulations is especially useful for quickly checking species-specific bag limits before a trip.

You may also find the FishingBooker Hawaii fishing license guide and the StateOutdoors Hawaii fishing license overview helpful for understanding the license system in plain language, though always cross-reference with official DAR materials for legal accuracy.

Finally, for a practical angler’s perspective on fly fishing Hawaii’s saltwater flats, the Fly Fish Hawaii FAQ covers gear recommendations, tide considerations, and island-by-island access tips that complement the regulatory framework described here.