Tanzania — Sea Water Temperature and Annual Ranges
Up-to-date sea water temperatures for the coasts of Tanzania. 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
Tanzania’s long Indian Ocean coastline, including the mainland beaches and the islands of Zanzibar and Pemba, enjoys characteristically tropical sea temperatures that remain inviting year‑round. Typical water temperatures along the coast range from about 24–30 °C (75–86 °F). The coolest period usually falls in the austral winter months of June to August, when sea temperatures commonly sit around 25–26 °C (77–79 °F). The warmest waters are most often recorded between January and March, when surface temperatures rise to roughly 28–30 °C (82–86 °F). Transitional months in spring and autumn generally produce temperatures in the mid‑20s to high‑20s °C (around 79–82 °F), so swimmers and snorkelers can expect comfortable conditions for most of the year.
Swimming Conditions
Swimming is widely permitted and popular along Tanzania’s coast because the warm, shallow waters suit recreational swimming, snorkeling and diving. Many sheltered bays and lagoon areas have calm seas suitable for families, while coral reefs offer rich marine life and snorkeling opportunities. That said, local conditions determine safety at any given time: seasonal winds and monsoon shifts can create strong currents, higher surf and reduced visibility, and estuaries or river mouths should be approached with caution. Marine protected areas may have access rules to protect ecosystems. Visitors are advised to heed local beach safety warnings, respect tide and current signs, and use guides for reef and deep‑water activities, but from a temperature and general accessibility standpoint the Tanzanian coast is highly conducive to swimming through the year.