Hong Kong — Sea Water Temperature and Annual Ranges
Up-to-date sea water temperatures for the coasts of Hong Kong. Learn about today’s conditions, monthly averages, and how the surrounding seas and oceans vary by season. We find every place where you can swim and show you the water temperature there today and throughout the year.
Sea Water Temperature Along the Coast
Chart of Average Temperature Changes Over the Last 60 Days
Places with the Warmest Sea Water Today
The Most Popular Seaside Places
Coastal Seas and Oceans
Water Temperature and Swimming Overview
Regions and Map
Water Temperature Trends
Hong Kong’s coastal waters show a clear seasonal pattern. In winter (December–February) sea temperatures generally range from about 16 to 20 °C (61 to 68 °F), making the water noticeably cool for most recreational swimmers. Spring (March–May) warms gradually, with typical values around 18 to 24 °C (64 to 75 °F). The warmest months are in summer (June–August), when coastal temperatures commonly reach 26 to 30 °C (79 to 86 °F) and feel comfortable for long swims. In autumn (September–November) the water cools again to roughly 23 to 28 °C (73 to 82 °F). Local variations occur by bay, depth and current, so nearby beaches can be a degree or two warmer or cooler than open water.
Swimming Conditions
Swimming is allowed along Hong Kong’s coastline, and many public “gazetted” beaches provide lifeguard services, changing rooms and safety signage particularly during the bathing season, roughly April/May through October. Water quality and safety can change with rainfall, tides and maritime traffic, so authorities issue advisories and sometimes close beaches when pollution, red tides, strong currents or dangerous marine life are a concern. Open-water swimmers and those taking part in events should heed local warnings, swim in designated areas, and consider a wetsuit during cooler months. Overall, Hong Kong offers plentiful swimming opportunities year-round, but conditions and comfort vary with the season and it is sensible to check current local guidance before entering the water.