American Samoa — Sea Water Temperature and Annual Ranges
Up-to-date sea water temperatures for the coasts of American Samoa. 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
American Samoa’s coastal waters remain warm year-round, reflecting its tropical location in the South Pacific. Typical sea-surface temperatures along the coastline range from about 25–29 °C (77–84 °F), with the warmest conditions tending to occur in the warmer, wetter months and the coolest in the austral winter. Shallow lagoons and sheltered bays can be a degree or two warmer in calm conditions, and temperatures seldom fall much below 24 °C (75 °F) or exceed about 30 °C (86 °F) in most coastal areas. Seasonal variation is modest compared with temperate regions: the wetter season from roughly November to April often brings slightly warmer and more humid air and water, while the drier months from May to October can produce marginally cooler seas and clearer water.
Swimming Conditions
Swimming is generally permitted and popular in American Samoa because the water is comfortably warm and supports abundant snorkeling and diving around coral reefs. Recreational swimming, snorkeling, and free diving are common in protected bays and beach breaks where coral gardens and marine life are accessible. Visitors should be mindful of natural hazards such as strong currents, sudden weather changes, and occasional rough surf; many beaches do not have lifeguards, and water quality can be affected by runoff after heavy rains. Respecting local regulations designed to protect reefs and marine habitats is important, and wearing reef-safe sunscreen and avoiding contact with coral help preserve the environment. With sensible precautions, the coastal waters of American Samoa offer safe and enjoyable swimming opportunities throughout the year.