Fifeshire Reef is the easy reef of the Terrigal boat dive menu. The Terrigal Underwater Group calls it a pretty little reef off North Avoca teeming with fish and macro life, and the Marine Life Network's Terrigal list describes it as a shallow reef that offers a nice dive, particularly for newer divers. Muddy Puddle Diver notes that it is not far from the boat ramp and close to shore, which is exactly why operators reach for it on days when the offshore reefs or the ex-HMAS Adelaide are out of reach.

Most of the reef sits between about 12 and 20 m, with McFadyen's GPS list giving 21 m at the mark. The terrain is kelp-covered sandstone with low ledges, boulders and gutters, grading to sand at the edges. Under the kelp and in the cracks is where the site earns its reputation: nudibranchs, flatworms, decorator crabs, sea hares and small cryptic fish are common, and photographers with macro lenses can spend an entire dive on a few square metres of reef.

Fish life is typical of the inshore Central Coast - yellowtail, silver sweep, mado and one-spot pullers over the kelp, red morwong and eastern blue gropers around the boulders, and the occasional wobbegong, Port Jackson shark or fiddler ray on the sand. Cuttlefish are regular in winter. Fifeshire does not have the drama of Foggy Cave or the scale of the Adelaide, and the Marine Life Network notes that the deeper San Francisco Reef nearby has better fish and sponges.

But as a shallow, forgiving dive with short transit and good bottom time, it is valuable - for training, for newly certified divers building confidence, for a relaxed second dive, and for a sheltered option when the swell is up.

All boat dives in this area launch from the Terrigal Haven boat ramp at the southern end of Terrigal Beach, tucked behind The Skillion headland. From the Central Coast Highway follow Terrigal Drive into Terrigal, then Kurrawyba Avenue and Terrigal Esplanade to The Haven, where there is a paid car park beside the ramp; Pro Dive Central Coast's shop is a short walk away and gear is loaded on the ramp or the adjacent beach. Private boats need a ramp with good parking early on weekends as the car park fills by mid-morning in summer.

From The Haven the boat heads south past Terrigal Point toward North Avoca; the reef lies close to shore and is only about 5 minutes away. McFadyen's NSW GPS marks list 'Fifeshire' at 33°27.4883'S 151°26.9349'E in 21 m.

Terrigal's offshore reefs are open to the Tasman Sea and are dived only when swell is below roughly 1.5 m; a north-east sea breeze building through the afternoon in summer and strong southerlies after a front are the usual reasons trips are cancelled, so morning departures are the norm. The Haven boat ramp is sheltered by The Skillion but the run out past the headland can be lumpy in a south-easterly. Visibility is best in late summer and autumn when the East Australian Current pushes warm blue water inshore, and worst after heavy rain when Terrigal Lagoon, Wamberal Lagoon and Avoca Lagoon open and stain the inshore water.

Winter water is cooler (around 15-17 °C) but often clear. Fifeshire is the usual fallback when the offshore reefs are too rough, but it still needs swell under about 1.5 m.

Descend on the anchor and explore the kelp-covered reef at 14-18 m, following ledges and gutters down to the sand edge near 20 m. Keep the dive simple - an out-and-back or small square route - and return to the anchor for the ascent and safety stop.

Pro Dive Central Coast uses Fifeshire as a sheltered alternative and training site when offshore sites are marginal; Terrigal Underwater Group dives it regularly.