Norfolk Island — Sea Water Temperature and Annual Ranges
Up-to-date sea water temperatures for the coasts of Norfolk Island. 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
Norfolk Island sits in the subtropical South Pacific, and its coastal waters are generally mild year-round, making swimming attractive for much of the year. Sea surface temperatures typically range from about 18–26 °C (64–79 °F) across the seasons. In the austral summer (December to February) water temperatures are at their warmest, commonly around 23–26 °C (73–79 °F). During autumn (March to May) the sea stays pleasant, usually 21–24 °C (70–75 °F). Winter (June to August) brings the coolest conditions, with coastal waters often between 18–20 °C (64–68 °F), while spring (September to November) sees a steady rise back toward the summer range, roughly 19–23 °C (66–73 °F).
Swimming Conditions
Swimming is permitted and popular in sheltered spots, especially family-friendly bays with sandy beaches and relatively calm conditions. Emily Bay and nearby coves are well known for gentle water and clear visibility, suitable for swimming and snorkeling. The island’s exposed rocky shoreline and surf breaks can produce strong currents and rough conditions, so caution is advised on open-coast beaches. Lifeguard coverage is not guaranteed everywhere, and weather or swell can change quickly, so visitors should check local advice before entering the water. Water visibility and marine life make snorkeling attractive, but swimmers should be mindful of reef protection and safety considerations. Overall, Norfolk Island offers year-round coastal swimming opportunities, with winter waters feeling brisk to some, while summer and autumn provide the warmest and most comfortable conditions for most swimmers.