Costa Rica — Sea Water Temperature and Annual Ranges
Up-to-date sea water temperatures for the coasts of Costa Rica. 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
- Jaco30°C
- Cahuita29°C
- Samara30°C
- Limon29°C
- Tamarindo30°C
- Playa Coyote30°C
- Manuel Antonio30°C
- Tarcoles30°C
- Matapalo (Playa Matapalo)30°C
- Gulf of Papagayo30°C
- Santa Teresa30°C
- Isla Berrugate30°C
- Brasilito30°C
- Quepos30°C
- El Roble30°C
- Playa Conchal30°C
- Chacarita30°C
- Playa Naranjo30°C
- Puerto Viejo de Talamanca29°C
- Playa Flamingo30°C
- Playa Langosta30°C
- Las Catalinas30°C
- Playa Hermosa30°C
- Puerto Jimenez30°C
- Isla de Chira30°C
- Punta Morales30°C
- Westfalia29°C
- Playa Guiones30°C
- Cuajiniquil30°C
- Punta Islita30°C
- Nosara30°C
- San Juanillo30°C
- Los Pargos30°C
- Nacascolo30°C
- Nandayure30°C
- Playa Guacalillo30°C
- Playa Grande30°C
- Uvita30°C
- Paquera30°C
- Tortuguero29°C
Coastal Seas and Oceans
Water Temperature and Swimming Overview
Regions and Map
Water Temperature Trends
Costa Rica’s coastal waters are warm year-round, reflecting its tropical location between the Caribbean Sea and the Pacific Ocean. Typical sea temperatures range from about 24–29 °C (75–84 °F) depending on the coast and season. The Pacific side often fluctuates between roughly 24–29 °C (75–84 °F), with occasional cooler patches from coastal upwelling, while the Caribbean side tends to be steady and slightly warmer, generally around 26–29 °C (79–84 °F). Seasonal shifts are modest: the drier months (roughly December to April) can bring clearer, slightly warmer surface water and calm conditions in many bays, while the rainy season (May to November) may see more variability, runoff, and localized cooling in some Pacific areas. Regional differences are notable—protected gulfs and bays often feel warmer and calmer than exposed beaches.
Swimming Conditions
Swimming is widely possible and popular throughout Costa Rica because the water temperatures are comfortable without needing wetsuits for most people. Many beaches are safe for casual swimming, snorkeling and diving, especially where there are reefs, sheltered coves, or lifeguards. However, safety depends on local conditions: strong surf, rip currents, seasonal storms, and occasional jellyfish or debris after heavy rains can make swimming hazardous at times. Visitors should heed posted warnings, follow lifeguard guidance where present, and check local advice about conditions before entering the water. With appropriate precautions, Costa Rica offers abundant opportunities for swimming, snorkeling and exploring marine life year-round.