Water Temperature of the Caribbean Sea in St. John, VI

Current Water Temperature

79.9°F

Measurement Time: Thursday, March 19, 2026, 7:00 AM AST

Temperature Locations

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Caribbean Sea

Station Name: South of St. John, VI
Station Type: Buoy
Data Source: National Data Buoy Center

Elevation Above Sea Level: 0 feet

Nearest Address:
St. John, VI 00830

GPS Coordinates: 18.249, -64.763

Nearby Water Temperatures

Lameshur Bay, Coral Harbour (St. John), VI (5.4 mi)
Long Bay, Charlotte Amalie (St. Thomas), VI (11.9 mi)
Christiansted Harbor, Christiansted (St. Croix), VI (34.9 mi)
Bahía de Sardinas, Culebra, PR (35.6 mi)
Limetree Bay, St. Croix, VI (38.3 mi)
Atlantic Ocean, Vieques, PR (46 mi)
Caribbean Sea, Esperanza, PR (47.7 mi)
Atlantic Ocean, San Juan, PR (89 mi)
Unnamed Creek, Fort Buchanan, PR (89.5 mi)
Unnamed Creek, Fort Buchanan, PR (89.5 mi)
San Juan Bay, San Juan, PR (89.9 mi)
Las Casas Lake, Fort Buchanan, PR (90 mi)
Caribbean Sea, La Parguera, PR (151.2 mi)
Bahía de Mayagüez, Mayagüez, PR (157.5 mi)
Bahía de Aguadilla, Aguadilla, PR (158.1 mi)

Weather for St. John, US Virgin Islands

Current Weather

75.6°F
Clear
Clear
79°F
82.2°F
89%
ESE 7.6 mph
11.7 mph
78.1°F
71°F
0 in
25%
9 mi
1012 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Wed
H: 84°F
L: 78°F
Partly Cloudy
Thu
H: 85°F
L: 78°F
Heavy rain
Fri
H: 80°F
L: 78°F
Moderate rain
Sat
H: 80°F
L: 78°F
Moderate rain
Sun
H: 79°F
L: 77°F

Air Quality

AQI: 1 - Good
PM2.5: 4.25 μg/m3
PM10: 5.65 μg/m3
Carbon Monoxide: 105.85 μg/m3
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 70 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 12:19 AM
Sunset: 6:36 PM
Daylight: 12 hrs 34 mins
Moonrise: 4:31 AM
Moon Transit: 11:33 AM
Moonset: 4:59 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
11:03 AM - 1:33 PM

Minor Periods

4:29 PM - 5:59 PM
4:01 AM - 5:31 AM

Action Rating: 2 out of 5

Rip Current Statement issued April 14 at 8:47PM AST until April 15 at 6:00PM AST by NWS San Juan PR

Effective: Tue April 14, 2026, 8:47 PM
Expires: Wed April 15, 2026, 5:00 AM

* WHAT...Life-threatening rip current. * WHERE...Northwest to northeast beaches of Puerto Rico, including beaches in Culebra. * WHEN...Through Wednesday afternoon. * 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.
Wednesday, April 15, 2026

Weather Forecast

Patchy rain nearby
84.2°F
77.9°F
79.4°F
79%
0.05 in
62%
0%
16.8 mph
2.9


Air Quality

AQI: 1 - Good
PM2.5: 4.91 μg/m3
PM10: 6.58 μg/m3
Carbon Monoxide: 107.09 μg/m3
Nitrogen Dioxide: 1.57 μg/m3
Sulphur Dioxide: 1.94 μg/m3
Ozone: 69.36 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 12:19 AM
Sunset: 6:36 PM
Daylight: 12 hrs 34 mins
Moonrise: 4:31 AM
Moon Transit: 11:33 AM
Moonset: 4:59 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

1:17 AM - 3:47 AM
11:03 AM - 1:33 PM

Minor Periods

4:29 PM - 5:59 PM
4:01 AM - 5:31 AM

Action Rating: 2 out of 5

Thursday, April 16, 2026

Weather Forecast

Partly Cloudy
84.6°F
77.7°F
80.1°F
83%
0 in
0%
0%
17.4 mph
2.8


Air Quality

AQI: 1 - Good
PM2.5: 5.69 μg/m3
PM10: 8.33 μg/m3
Carbon Monoxide: 107.73 μg/m3
Nitrogen Dioxide: 1.47 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 65.72 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 12:18 AM
Sunset: 6:36 PM
Daylight: 12 hrs 35 mins
Moonrise: 5:09 AM
Moon Transit: 11:30 AM
Moonset: 5:57 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:00 AM - 1:30 PM

Minor Periods

5:27 PM - 6:57 PM
4:39 AM - 6:09 AM

Action Rating: 5 out of 5

Friday, April 17, 2026

Weather Forecast

Heavy rain
80.4°F
78.1°F
78.8°F
79%
0.81 in
89%
0%
19.2 mph
2.4


Air Quality

AQI: 1 - Good
PM2.5: 4.45 μg/m3
PM10: 6.46 μg/m3
Carbon Monoxide: 105.25 μg/m3
Nitrogen Dioxide: 1.44 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 65.52 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 12:18 AM
Sunset: 6:37 PM
Daylight: 12 hrs 36 mins
Moonrise: 5:51 AM
Moon Transit: 12:22 AM
Moonset: 7:00 PM
Moon Phase: New
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

2:55 AM - 5:25 AM
11:52 AM - 2:22 PM

Minor Periods

6:30 PM - 8:00 PM
5:21 AM - 6:51 AM

Action Rating: 4 out of 5

Saturday, April 18, 2026

Weather Forecast

Moderate rain
79.6°F
77.5°F
78.7°F
75%
0.43 in
88%
0%
19.7 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 7.88 μg/m3
PM10: 12.05 μg/m3
Carbon Monoxide: 111.86 μg/m3
Nitrogen Dioxide: 1.31 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 75.56 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 12:18 AM
Sunset: 6:37 PM
Daylight: 12 hrs 37 mins
Moonrise: 6:37 AM
Moon Transit: 1:18 PM
Moonset: 8:05 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

3:49 AM - 6:19 AM
12:48 AM - 3:18 PM

Minor Periods

7:35 PM - 9:05 PM
6:07 AM - 7:37 AM

Action Rating: 5 out of 5

Sunday, April 19, 2026

Weather Forecast

Moderate rain
79°F
77.4°F
78.3°F
76%
0.7 in
64%
0%
22.4 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 6.72 μg/m3
PM10: 10.3 μg/m3
Carbon Monoxide: 112.58 μg/m3
Nitrogen Dioxide: 1.34 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 73 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 12:18 AM
Sunset: 6:37 PM
Daylight: 12 hrs 38 mins
Moonrise: 7:28 AM
Moon Transit: 2:19 PM
Moonset: 9:14 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.9%

Best Times for Fishing or Hunting

Major Periods

4:49 AM - 7:19 AM
1:49 PM - 4:19 PM

Minor Periods

8:44 PM - 10:14 PM
6:58 AM - 8:28 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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