Water Temperature of San Juan Bay in San Juan, PR

Current Water Temperature

81.9°F

Measurement Time: Thursday, April 9, 2026, 11:00 PM AST

Today's Tides

 High: April 9, 2:24 AM, 1.3 ft
Low: April 9, 9:09 AM, 0.5 ft
 High: April 9, 1:11 PM, 0.7 ft
Low: April 9, 7:42 PM, 0.0 ft

Temperature Locations

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Local Points of Interest

Bahia de San Juan; Old San Juan; Port of San Juan; Caribbean Sea

San Juan Bay

Station Name: San Juan, La Puntilla, San Juan Bay
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 3 feet

Sensor Depth: -4 feet

Nearest Address:
La Puntilla
San Juan, PR 00901
San Juan County

GPS Coordinates: 18.459167, -66.116389

Nearby Water Temperatures

Atlantic Ocean, San Juan, PR (1.5 mi)
Unnamed Creek, Fort Buchanan, PR (2.7 mi)
Las Casas Lake, Fort Buchanan, PR (3.1 mi)
Unnamed Creek, Fort Buchanan, PR (3.6 mi)
Atlantic Ocean, Vieques, PR (44.9 mi)
Caribbean Sea, Esperanza, PR (49.3 mi)
Bahía de Sardinas, Culebra, PR (54.5 mi)
Bahía de Aguadilla, Aguadilla, PR (68.7 mi)
Caribbean Sea, La Parguera, PR (69.8 mi)
Bahía de Mayagüez, Mayagüez, PR (70.6 mi)
Long Bay, Charlotte Amalie (St. Thomas), VI (78.9 mi)
Caribbean Sea, St. John, VI (89.9 mi)
Lameshur Bay, Coral Harbour (St. John), VI (91.8 mi)
Limetree Bay, St. Croix, VI (103.9 mi)
Christiansted Harbor, Christiansted (St. Croix), VI (105.3 mi)

Weather for San Juan, Puerto Rico

Current Weather

79.4°F
Clear
Clear
85.4°F
85.4°F
86%
ESE 9.4 mph
14.6 mph
79.4°F
75.2°F
0 in
15%
6 mi
1015 mbar
0

Five Day Weather Forecast

Partly Cloudy
Thu
H: 89°F
L: 77°F
Partly Cloudy
Fri
H: 84°F
L: 77°F
Patchy rain nearby
Sat
H: 84°F
L: 76°F
Overcast
Sun
H: 79°F
L: 75°F
Moderate rain
Mon
H: 82°F
L: 72°F

Air Quality

AQI: 1 - Good
PM2.5: 7.15 μg/m3
PM10: 9.65 μg/m3
Carbon Monoxide: 114.85 μg/m3
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 52 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 12:26 AM
Sunset: 6:40 PM
Daylight: 12 hrs 28 mins
Moonrise: 12:33 AM
Moon Transit: 6:03 AM
Moonset: 11:34 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

5:33 AM - 8:03 AM
9:16 PM - 11:46 PM

Minor Periods

11:04 AM - 12:34 AM
12:03 AM - 1:33 AM

Action Rating: 2 out of 5

Rip Current Statement issued April 9 at 11:25AM AST until April 11 at 6:00AM AST by NWS San Juan PR

Effective: Thu April 9, 2026, 11:25 AM
Expires: Thu April 9, 2026, 11:30 PM

* WHAT...High Rip Current Risk, life-threatening rip currents. * WHERE...North facing beaches of Puerto Rico and Culebra. * WHEN...Through late Friday night. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water, where it becomes difficult to return to safety.

There is a high risk of rip currents. Rip currents are powerful channels of water flowing quickly away from shore, which occur most often at low spots or breaks in the sandbar and in the vicinity of structures such as groins, jetties and piers. Heed the advice of lifeguards, beach patrol flags and signs. If you become caught in a rip current, yell for help. Remain calm, do not exhaust yourself and stay afloat while waiting for help. If you have to swim out of a rip current, swim parallel to shore and back toward the beach when possible. Do not attempt to swim directly against a rip current as you will tire quickly.


Hydrologic Outlook issued April 9 at 11:19AM AST by NWS San Juan PR

Effective: Thu April 9, 2026, 11:19 AM
Expires: Sat April 11, 2026, 11:30 AM

ESFSJU A mid to upper level trough is expected to move across Hispaniola on Sunday, reaching Puerto Rico and the Virgin Islands late Sunday into Monday. By Tuesday, the trough will be developing a closed low pressure system in the mid and upper level of the atmosphere, with a well defined trough (or possibly a low) developing at the surface. As a result, favorable conditions for periods of heavy rain are anticipated on Monday and Tuesday. The first round of showers is expected to reach the region Sunday night into early Monday. On Monday morning, showers and isolated thunderstorms will stream across the Virgin Islands and portions of eastern Puerto Rico. Then, in the afternoon, stronger activity is expected to develop for the interior, moving into portions of the south-central, west and southwest Puerto Rico. By Tuesday, if a low pressure develops in the lower levels, the steering winds will weaken significantly. As a result, showers will move slow from the Atlantic Ocean into portions of the east and north of Puerto Rico and the Virgin Islands. At this time, soils continue to be saturated along the east and south of Puerto Rico, but a break in recent rainfalls yesterday and today will allow for the soil to dry a little. Streams are mostly running near normal or high across the entire region. Taking all these factors into consideration, the likelihood of urban and small stream flooding, isolated flash flooding, landslides and rapid river rises is increasing. While it is too early to determine how much rainfall will fall, the most likely scenario is for 1 to 3" each day, and very isolated higher amounts. So far, the days with the highest potential for flooding are Monday and Tuesday, but above normal moisture will persist through late in the workweek. At this time, confidence in the forecast is medium, since small changes in timing of arrival and position of the feature could affect the total precipitation received and the areas most affected. Usually, by mid-April, the Early Wet Season unfold in the northeast Caribbean Islands. However, this year, the dry season never arrived. In fact, the Last 60 Days Percent of Normal from the National Water Prediction Service show 300 to 500% above normal precipitation for southern Puerto Rico, from Salinas to Lajas. Areas in the interior and north were also wetter than what is expected for February and March, with nearly 100 to 200% above normal. Please, stay tuned for updates in the forecast this weekend. This product will be updated as necessary to reflect updates in the forecast. Additional information can be found in the Area Forecast Discussion (AFDSJU).


Rip Current Statement issued April 9 at 3:33PM AST until April 11 at 6:00AM AST by NWS San Juan PR

Effective: Thu April 9, 2026, 3:33 PM
Expires: Fri April 10, 2026, 3:15 AM

* WHAT...High Rip Current Risk, life-threatening rip currents. * WHERE...North facing beaches of Puerto Rico and Culebra. * WHEN...Through late Friday night. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water, where it becomes difficult to return to safety.

There is a high risk of rip currents. Rip currents are powerful channels of water flowing quickly away from shore, which occur most often at low spots or breaks in the sandbar and in the vicinity of structures such as groins, jetties and piers. Heed the advice of lifeguards, beach patrol flags and signs. If you become caught in a rip current, yell for help. Remain calm, do not exhaust yourself and stay afloat while waiting for help. If you have to swim out of a rip current, swim parallel to shore and back toward the beach when possible. Do not attempt to swim directly against a rip current as you will tire quickly.


Thursday, April 9, 2026

Weather Forecast

Partly Cloudy
89.1°F
77°F
80.9°F
81%
0 in
0%
0%
16.1 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 9.54 μg/m3
PM10: 12.32 μg/m3
Carbon Monoxide: 115.69 μg/m3
Nitrogen Dioxide: 1.51 μg/m3
Sulphur Dioxide: 2.51 μg/m3
Ozone: 60.56 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 12:26 AM
Sunset: 6:40 PM
Daylight: 12 hrs 28 mins
Moonrise: 12:33 AM
Moon Transit: 6:03 AM
Moonset: 11:34 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

5:33 AM - 8:03 AM
9:16 PM - 11:46 PM

Minor Periods

11:04 AM - 12:34 AM
12:03 AM - 1:33 AM

Action Rating: 2 out of 5

Friday, April 10, 2026

Weather Forecast

Partly Cloudy
83.8°F
77.4°F
79.6°F
80%
0 in
0%
0%
15.7 mph
2.8


Air Quality

AQI: 1 - Good
PM2.5: 6.77 μg/m3
PM10: 9.31 μg/m3
Carbon Monoxide: 114.33 μg/m3
Nitrogen Dioxide: 1.49 μg/m3
Sulphur Dioxide: 1.24 μg/m3
Ozone: 56.48 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 12:25 AM
Sunset: 6:41 PM
Daylight: 12 hrs 29 mins
Moonrise: 1:20 AM
Moon Transit: 6:53 AM
Moonset: 12:30 AM
Moon Phase: Last Quarter
Moon Illumination: 31.0%

Best Times for Fishing or Hunting

Major Periods

6:23 AM - 8:53 AM
12:00 AM - 12:00 AM

Minor Periods

12:00 AM - 1:30 PM
12:50 AM - 2:20 AM

Action Rating: 3 out of 5

Saturday, April 11, 2026

Weather Forecast

Patchy rain nearby
83.7°F
75.9°F
79.6°F
82%
0.02 in
88%
0%
16.8 mph
2.7


Air Quality

AQI: 1 - Good
PM2.5: 4.9 μg/m3
PM10: 6.63 μg/m3
Carbon Monoxide: 112.97 μg/m3
Nitrogen Dioxide: 1.57 μg/m3
Sulphur Dioxide: 1.62 μg/m3
Ozone: 54.44 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 12:25 AM
Sunset: 6:41 PM
Daylight: 12 hrs 30 mins
Moonrise: 2:04 AM
Moon Transit: 7:42 AM
Moonset: 1:24 PM
Moon Phase: Last Quarter
Moon Illumination: 21.1%

Best Times for Fishing or Hunting

Major Periods

7:12 AM - 9:42 AM
12:00 AM - 12:00 AM

Minor Periods

12:54 AM - 2:24 PM
1:34 AM - 3:04 AM

Action Rating: 2 out of 5

Sunday, April 12, 2026

Weather Forecast

Overcast
79°F
74.8°F
76.7°F
94%
0 in
0%
0%
16.1 mph
2.8


Air Quality

AQI: 1 - Good
PM2.5: 4.18 μg/m3
PM10: 5.42 μg/m3
Carbon Monoxide: 112.02 μg/m3
Nitrogen Dioxide: 1.71 μg/m3
Sulphur Dioxide: 1.69 μg/m3
Ozone: 51.4 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 12:25 AM
Sunset: 6:41 PM
Daylight: 12 hrs 31 mins
Moonrise: 2:44 AM
Moon Transit: 8:29 AM
Moonset: 2:19 PM
Moon Phase: Waning Crescent
Moon Illumination: 12.6%

Best Times for Fishing or Hunting

Major Periods

7:59 AM - 10:29 AM
12:00 AM - 12:00 AM

Minor Periods

1:49 PM - 3:19 PM
2:14 AM - 3:44 AM

Action Rating: 2 out of 5

Monday, April 13, 2026

Weather Forecast

Moderate rain
81.6°F
72.3°F
76.2°F
82%
0.7 in
86%
0%
13.6 mph
2.7


Air Quality

AQI: 1 - Good
PM2.5: 3.82 μg/m3
PM10: 4.73 μg/m3
Carbon Monoxide: 109.83 μg/m3
Nitrogen Dioxide: 2.12 μg/m3
Sulphur Dioxide: 1.51 μg/m3
Ozone: 48.69 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 12:24 AM
Sunset: 6:41 PM
Daylight: 12 hrs 32 mins
Moonrise: 3:22 AM
Moon Transit: 9:15 AM
Moonset: 3:13 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.1%

Best Times for Fishing or Hunting

Major Periods

8:45 AM - 11:15 AM
12:00 AM - 12:00 AM

Minor Periods

2:43 PM - 4:13 PM
2:52 AM - 4:22 AM

Action Rating: 2 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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