Both rainbow and brown trout are present and, as there are limited spawning opportunities, each year around 2000 rainbow trout and 500 brown trout are released into Lake Arapuni by Fish and Game. Consequently, fish numbers are good with an average around 2.5 kg, with many going much larger. The average length of rainbow trout is around 50cm.

Access map

Lake Arapuni is a long narrow lake and like others in the Waikato hydro system has a problem with weed infestation during the warm summer months, especially around the shoreline. There is very limited shoreline access for the angler and so most fishing requires using a boat. Consequently, trolling and harling are the most preferred methods but those who are willing to either drift or moor a boat and cast a fly or spinner around the weed beds can do very well.

Over the past years, as the quality of the stocked fish has increased, Lake Arapuni has become one of the better waters within the Waikato district consistently producing trophy fish. It is well served by boat ramps. The most consistent fishing is to be found at the head of the Lake where the water flows from the Waipapa dam. The water here can fluctuate as the water is released for electric power production and so it is very important to stay within the clearly marked channels when fishing.

Much of the farm land bordering the Arapuni power station is owned by Mighty River Power (MRP) and leased to farmers. In 2008 MRP agreed that anglers could have access to the land downstream of the Arapuni Bridge on the true left bank without requiring prior permission. Access to the headrace, spillway and tail race can be gained by a walking track that starts from Arapuni Village. Walk across the swing bridge to the road on the other side of the river, across the road is a stairway that leads to the track that provides access to lots of good fishing water with the prime spot being the junction of the spillway and tail race.

The spillway flows through the lower reaches of the Waitete Stream, and is open to fishing all year as it is considered to be part of the Waikato River.

Boat ramps

There are a number of boat ramps on both sides of the lake. See the Lake Arapuni access map.

Fishing below the Waipapa Dam

The traditional technique to fish for trout below the Waipapa Dam is to use a spinning rod and small ball sinker above a swivel with a short leader and either a worm or a wet fly (such as a silver rabbit) Cast the worm / wet fly upstream and then allow it to bounce back along the bottom. As there are a lot of snags on the bottom, some anglers try and fish mid-water to try and avoid losing too much gear.

Usually only a couple of turbines are working, so one side of the river will have some comparatively still water and that is often where the fish are to be found. When all the turbines are working at full capacity it becomes unfishable. However occasionally the turbines are turned off late at night and then the fishing can be superb.

Fly fishing with a large wet fly along the margins can also be productive, especially in the evening or early morning.

Nymphs:
Nymphs which imitate caddis or emerging caddis can be very effective especially during the summer months. Otherwise use an all-round fly. Try weighted Pheasants Tail or Hare and Copper or Green Caddis larvae when fishing along the weed beds.

Dry flies:
During the summer, especially in the section below the Waipapa dam, there can be a very good caddis fly hatch. Using caddis patterns particularly in green patterns during the evenings can be very effective at this time. Also use cicada patterns when these large insects can be heard chirruping away in the trees.

Wet flies / Streamers:
Any fly that imitates a small bully or fish such as a Hamill's Killer, Mrs Simpson or rabbit (particularly yellow or green) patterns, is effective during the day. During the evenings use darker patterns and when fishing at night try Fuzzy Wuzzy, Black Marabou patterns and flies such as the Scotch Poacher or Craig's Night-time.

Spinners:

Tokoroa Chickens work well throughout the year; otherwise try Black and Gold Toby's or dark coloured Cobras or Tasmanian Devils.

When fishing Lake Arapuni no  fish taken from any water other than Lake Arapuni can be used. Coloured dough and corn may be used.