Climate Overview
The climate in San Juan del Sur is hot. The average annual temperature is 27°C and approximately 1491mm of precipitation falls per year. October is the wettest month, receiving around 342mm of rainfall. San Juan del Sur is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, April, August. The coldest months are February, January, March, when temperatures can drop to 24°C.
Temperature
San Juan del Sur has relatively stable temperatures year-round, staying within a 6°C range. The warmest month is May, when average highs reach 30°C and the mean temperature sits around 28°C. February is the coolest month, with minimum temperatures around 24°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.
Precipitation
San Juan del Sur is a fairly wet location, receiving approximately 1491mm of precipitation annually, which averages out to around 124mm per month. The wettest month is October, averaging 342mm of rainfall. June and September also tend to see above-average precipitation. The driest month is February, with just 0mm. That's 342mm less than October, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
San Juan del Sur is very windy, with an average annual wind speed of 31km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 40km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in October, with average winds dropping to 23km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 17km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 39km/h in winter, 32km/h in spring, 30km/h in summer, 25km/h in autumn.
Seasons
89 days until Summer
It is currently spring in San Juan del Sur, which began on March 20, 2026. San Juan del Sur is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in May at around 30°C, while the coldest stretch bottoms out in February near 24°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 25 to 30°C. Precipitation is moderate at around 186mm for the season, averaging 62mm per month. Winds are strong, averaging 32km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 26 to 29°C. Rainfall is heavy, totalling around 498mm across the season with a monthly average of 166mm. Winds are strong, averaging 30km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 26 to 29°C. Rainfall is heavy, totalling around 776mm across the season with a monthly average of 259mm. Winds are strong, averaging 25km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 24 to 28°C. Precipitation is minimal, with only around 31mm for the entire season. Winds are strong, averaging 39km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for San Juan del Sur based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
