Sai Kung tide times

Sai Kung is the closest Hong Kong gets to a town that feels built around the sea rather than built beside it. The waterfront promenade doubles as an outdoor fish market, with live seafood tanks — grouper, prawn, abalone, geoduck — stacked outside every restaurant from the ferry pier to the town's western end. At weekends, the town fills with city residents who have made the 45-minute journey from Kowloon or Hong Kong Island specifically to eat seafood and access the country park trailheads that spread in every direction through the Sai Kung Peninsula.

The tidal regime at Sai Kung is mixed semidiurnal. Two unequal high waters and two unequal low waters complete the daily cycle, with the diurnal inequality most pronounced in summer. Spring range is approximately 1.8 to 2.0 metres from chart datum. The numerous inlets and headlands of the Sai Kung Peninsula create locally variable tidal streams — the channels between islands can carry 1 to 1.5 knots at peak spring flow, while the inner harbour at Sai Kung town is relatively protected. The kaido (water taxi) operators who run visitors to outlying beaches are thoroughly familiar with the local tidal stream patterns and plan their routes accordingly.

Beaches on the outer Sai Kung coast — particularly the four beaches of Tai Long Wan (Big Wave Bay) — are accessible only by kaido or by hiking trails that take 2 to 2.5 hours from the town's edge. The kaido service runs from the Sai Kung waterfront to the beach clusters on demand, with pricing set by negotiation. Tai Long Wan's four beaches (Sai Wan, Ham Tin Wan, Tai Wan, Tung Wan) occupy a northeast-facing bay that receives South China Sea swell — in autumn, when typhoon residual swell propagates northward after systems dissipate, consistent beach break develops on all four beaches. The spring tidal range of approximately 1.8 metres creates a measurable variation in the surf zone, with the best beach break shape typically on a mid-rising tide.

The High Island Reservoir area, east of Sai Kung, is part of the Hong Kong UNESCO Global Geopark. The hexagonal columnar jointing in the volcanic tuff — formed 140 million years ago when ash flows cooled and contracted — is among the best-preserved examples of this geological structure in Asia. The outer sea walls of the High Island Reservoir dam were completed in 1978, creating the largest reservoir in Hong Kong. The area around the dam's eastern sea wall gives access to the outer headland facing the South China Sea, and the geological columns are visible from the shoreline path.

For anglers, the rocky headlands and island passages of the Sai Kung Country Park are productive bottom fishing grounds. Grouper (several species including leopard coral grouper and giant grouper in deeper water), sea bream, and mud crab are the primary targets. The flood tide is the most productive window, as fish move inshore along the reef and rock edges. Licensed fishing is permitted in designated areas of the country park; check the Agriculture, Fisheries and Conservation Department (AFCD) for current restrictions.

Sea kayaking is a popular activity in Sai Kung. The protected inner waters of the Sai Kung Bay and the Triple Island group are manageable for beginners; the outer coast requires sea conditions assessment. Several operators run guided kayak day trips and camping expeditions to the outer bay beaches. The Sai Kung Country Park has designated camping sites at Ham Tin Wan and other beaches accessible by trail or boat.

Predictions on this page come from Open-Meteo Marine, a gridded global ocean model. Accuracy is typically within plus or minus 45 minutes on timing and 0.2 to 0.3 metres on height — model-derived, not from a local gauge. The local tide authority is the Hong Kong Observatory, which publishes annual tide tables for Hong Kong waters.