South Africa — Sea Water Temperature and Annual Ranges
Up-to-date sea water temperatures for the coasts of South Africa. 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
South Africa’s long coastline spans two very different marine climates because of the warm Agulhas Current on the Indian Ocean side and the cold Benguela Current on the Atlantic. On the east coast around Durban and KwaZulu‑Natal, sea temperatures are generally warm: in summer (December–February) they commonly range from about 24–28 °C (75–82 °F), while winter (June–August) waters cool to roughly 20–23 °C (68–73 °F). On the south and west coasts, including Cape Town and the Western Cape, the Atlantic influence keeps the water much cooler. Summer sea temperatures there typically sit between about 16–21 °C (61–70 °F), but winter and upwelling events can bring them down to roughly 10–15 °C (50–59 °F). Transitional seasons produce intermediate values and local conditions such as tides, wind and coastal upwelling can cause notable short‑term variations.
Swimming Conditions
Swimming is widely permitted and popular at many South African beaches, especially where beaches are patrolled by lifeguards and flagged for safe bathing. Warm Indian Ocean beaches are comfortable for casual swimming year‑round, whereas Atlantic beaches often require wetsuits for longer exposure because of the cooler temperatures. Safety considerations dictate behavior as much as temperature: rip currents, strong surf and seasonal marine life (including sharks and jellyfish in some areas) mean swimmers should heed local warnings, swim between the red and yellow flags, and avoid swimming after heavy rains when water quality may be poor. Many resorts and municipal beaches provide patrols, first aid and advisory information, making regulated spots the safest choice for sea swimming in South Africa.