The most detailed information about the water temperature in San Juan in The Caribbean (Puerto Rico). Forecast of changes in water temperature for the next 10 days. Statistics by months for recent years. Information about the neighboring resorts. Weather forecast in San Juan for a week.
Water temperature in San Juan right now
data updated 3 minutes ago81°F
yesterday: 80°F
a week ago: 80°F
Trend: stability
Today water temperature in San Juan is 81.3°F. It is very warm and comfortable water for long swimming in any body of water. It is believed that these are the ideal conditions under which one can be without the slightest discomfort. But it is worth remembering that at such a water temperature, various disease-causing organisms multiply very quickly. In any case, the general weather is also important. So, the air temperature at the same time will reach 75°F.
Analysis and forecast
The water temperature today roughly corresponds to the average value on this day in recent years. Its value has rise over the last week, but has drop compared to 20 days ago. Exactly a year ago, on this day, the water temperature in this location was 80°F. Water temperature range in San Juan in April is from 77 to 84 degrees.
According to our forecast, in the next 5-6 days the water temperature in San Juan will become lower than today, but in 10 days it will still slightly rise, its value will be 81°F.
Table of water temperature values in San Juan
| Day | Fact* | Average** | Forecast*** |
| Apr 11 | 28.2°C | 27.5°C | |
| Apr 12 | 27.5°C | 27.3°C | |
| Apr 13 | 27.3°C | 27.3°C | |
| Apr 14 | 27.5°C | 27.5°C | |
| Apr 15 | 27.1°C | 27.5°C | |
| Apr 16 | 26.9°C | 27.3°C | |
| Apr 17 | 27.2°C | 27.3°C | |
| Apr 18 | 27.4°C | 27.3°C | |
| Apr 19 | 27.0°C | 27.1°C | |
| Apr 20 | 27.3°C | 27.4°C | |
| Apr 21 | 27.0°C | 27.1°C | |
| Apr 22 | 27.3°C | 27.4°C | |
| Apr 23 | 27.3°C | 27.4°C | |
| Apr 24 | 27.0°C | 27.1°C | |
| Apr 25 | 27.3°C | 27.4°C |
** Average - Average water temperature on this day in past years
*** Forecast - Our forecast for the water temperature
Actual nearshore temperatures may vary by several degrees from the indicated values. This is noticeable after heavy rain or after prolonged periods of strong winds. Some downstream winds cause cold, deep waters to replace surface waters that have been warmed by the sun.
To develop a forecast, we use our own mathematical model, which takes into account the current change in water temperature, historical data and the main weather trends, wind strength and direction, air temperature in each specific region. We also take into account data for other resorts in Puerto Rico.
Annual graph of average water temperature change in San Juan
Water temperature in San Juan by month
San Juan located in the northern hemisphere, south of the northern tropic, at latitude 18 degrees. The swimming season in this location lasts all year round. Average annual water temperature on the coast in San Juan is 82°F, by the seasons: in winter 80°F, in spring 80°F, in summer 83°F, in autumn 84°F. Minimum water temperature (78°F) in San Juan it happens in March, maximum (85°F) in September.
You can find out detailed data on how the water temperature in San Juan changes in each specific month:
San Juan: general information and map
Neighboring cities and resorts
| City | Water* | Distance** |
| Catano | 81°C | 3km |
| Levittown | 81°C | 8km |
| Bayamn | 80°C | 9km |
| Carolina | 81°C | 18km |
| Loiza | 80°C | 24km |
| Vieques | 80°C | 29km |
| Playa Fortuna | 81°C | 39km |
| Mar Chiquita Beach | 81°C | 40km |
| Punta Santiago | 81°C | 50km |
| Palmas | 80°C | 54km |
| Lamboglia | 81°C | 55km |
| Arroyo | 81°C | 56km |
** Straight line distance in kilometers
The warmest water today in Puerto Rico recorded in Cabo Rojo, its value is 82°F. Lowest - in Loiza, there water temperature now 80°F. Average water temperature in the country today - 81°F.
Water temperature data in San Juan and neighboring towns and resorts collected from various sources, using buoys, using satellite maps of sea, river and lake surfaces of the NOAA agency.
We use data from various local authorities in each specific location of the world to more accurately reflect temperature values.
The nearest airport is located in a 1 kilometers. This is Fernando Luis Ribas Dominicci (SIG) airport. We have no information as to whether it is valid and what flights it receives or sends.
San Juan: weather forecast
The weather forecast is shown in local time in San Juan
8km/hhumidity: 84%, clouds: 15%
6km/hhumidity: 74%, clouds: 2%
10km/hhumidity: 64%, clouds: 0%
9km/hhumidity: 68%, clouds: 13%
5km/hhumidity: 74%, clouds: 21%
8km/hhumidity: 80%, clouds: 20%
10km/hhumidity: 84%, clouds: 1%
8km/hhumidity: 84%, clouds: 0%
9km/hhumidity: 83%, clouds: 0%
6km/hhumidity: 76%, clouds: 0%
7km/hhumidity: 67%, clouds: 21%
8km/hhumidity: 73%, clouds: 34%
3km/hhumidity: 76%, clouds: 49%
10km/hhumidity: 82%, clouds: 54%
11km/hhumidity: 83%, clouds: 40%
10km/hhumidity: 83%, clouds: 24%
12km/hhumidity: 84%, clouds: 0%
13km/hhumidity: 75%, clouds: 5%
8km/hhumidity: 61%, clouds: 7%
15km/hhumidity: 65%, clouds: 36%
18km/hhumidity: 66%, clouds: 57%
15km/hhumidity: 76%, clouds: 52%
14km/hhumidity: 80%, clouds: 0%
12km/hhumidity: 81%, clouds: 19%
12km/hhumidity: 81%, clouds: 27%
12km/hhumidity: 73%, clouds: 20%
15km/hhumidity: 64%, clouds: 22%
19km/hhumidity: 67%, clouds: 22%
17km/hhumidity: 70%, clouds: 21%
14km/hhumidity: 82%, clouds: 34%
13km/hhumidity: 85%, clouds: 25%
11km/hhumidity: 81%, clouds: 29%
12km/hhumidity: 85%, clouds: 51%
12km/hhumidity: 79%, clouds: 28%
18km/hhumidity: 70%, clouds: 16%
21km/hhumidity: 69%, clouds: 26%
19km/hhumidity: 71%, clouds: 60%
15km/hhumidity: 84%, clouds: 32%
12km/hhumidity: 87%, clouds: 2%
