Average monthly water temperature in San Juan, Puerto Rico

On this page you find the mean water temperature over the year in San Juan (North Puerto Rico), Puerto Rico. Discover when the water is at its warmest and coolest, perfect for planning your visit.

In San Juan, water temperatures are consistently warm throughout the year. The warmest month is August, with an average water temperature of 29°C (84°F).

The coolest month is March, with an average temperature of 26°C (79°F). This makes San Juan a year-round destination for swimming and other water-based activities.

San Juan 3-Day Forecast

10-Day Forecast

More climate data for San Juan

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full San Juan climate overview or explore weather in Puerto Rico.

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