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

84.4°F
Partly cloudy
Partly cloudy
98.4°F
86.3°F
70%
ESE 17 mph
22.7 mph
79.5°F
76°F
0 in
50%
9 mi
1016 mbar
12.6

Five Day Weather Forecast

Sunny
Thu
H: 83°F
L: 78°F
Partly Cloudy
Fri
H: 80°F
L: 78°F
Moderate rain
Sat
H: 80°F
L: 76°F
Patchy rain nearby
Sun
H: 83°F
L: 76°F
Moderate rain
Mon
H: 79°F
L: 75°F

Air Quality

AQI: 1 - Good
PM2.5: 10.65 μg/m3
PM10: 15.45 μg/m3
Carbon Monoxide: 111.85 μg/m3
Nitrogen Dioxide: 1.35 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 64 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 12:20 AM
Sunset: 6:35 PM
Daylight: 12 hrs 28 mins
Moonrise: 12:27 AM
Moon Transit: 5:57 AM
Moonset: 11:29 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

5:27 AM - 7:57 AM
9:21 PM - 11:51 PM

Minor Periods

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

Action Rating: 2 out of 5

Rip Current Statement issued April 9 at 3:38AM AST until April 11 at 6:00AM AST by NWS San Juan PR

Effective: Thu April 9, 2026, 3:38 AM
Expires: Thu April 9, 2026, 11:45 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

Sunny
82.6°F
78.1°F
79.2°F
85%
0 in
0%
0%
17.9 mph
3.1


Air Quality

AQI: 1 - Good
PM2.5: 9.53 μg/m3
PM10: 13.71 μg/m3
Carbon Monoxide: 114.09 μg/m3
Nitrogen Dioxide: 1.43 μg/m3
Sulphur Dioxide: 1.33 μg/m3
Ozone: 61.72 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 12:20 AM
Sunset: 6:35 PM
Daylight: 12 hrs 28 mins
Moonrise: 12:27 AM
Moon Transit: 5:57 AM
Moonset: 11:29 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

5:27 AM - 7:57 AM
9:21 PM - 11:51 PM

Minor Periods

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

Action Rating: 2 out of 5

Friday, April 10, 2026

Weather Forecast

Partly Cloudy
79.5°F
77.7°F
78.3°F
83%
0 in
0%
0%
20.1 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 7.9 μg/m3
PM10: 11.75 μg/m3
Carbon Monoxide: 114.41 μg/m3
Nitrogen Dioxide: 1.35 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 58.32 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 12:20 AM
Sunset: 6:35 PM
Daylight: 12 hrs 29 mins
Moonrise: 1:14 AM
Moon Transit: 6:47 AM
Moonset: 12:24 AM
Moon Phase: Last Quarter
Moon Illumination: 31.0%

Best Times for Fishing or Hunting

Major Periods

6:17 AM - 8:47 AM
12:00 AM - 12:00 AM

Minor Periods

11:54 AM - 1:24 PM
12:44 AM - 2:14 AM

Action Rating: 3 out of 5

Saturday, April 11, 2026

Weather Forecast

Moderate rain
79.5°F
76.1°F
78.3°F
88%
0.65 in
88%
0%
17.2 mph
3.1


Air Quality

AQI: 1 - Good
PM2.5: 6.87 μg/m3
PM10: 10.33 μg/m3
Carbon Monoxide: 112.45 μg/m3
Nitrogen Dioxide: 1.44 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 61.32 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 12:20 AM
Sunset: 6:35 PM
Daylight: 12 hrs 30 mins
Moonrise: 1:57 AM
Moon Transit: 7:36 AM
Moonset: 1:19 PM
Moon Phase: Last Quarter
Moon Illumination: 21.1%

Best Times for Fishing or Hunting

Major Periods

7:06 AM - 9:36 AM
12:00 AM - 12:00 AM

Minor Periods

12:49 AM - 2:19 PM
1:27 AM - 2:57 AM

Action Rating: 2 out of 5

Sunday, April 12, 2026

Weather Forecast

Patchy rain nearby
82.9°F
75.7°F
78.4°F
85%
0.18 in
89%
0%
16.1 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 4.84 μg/m3
PM10: 6.74 μg/m3
Carbon Monoxide: 112.78 μg/m3
Nitrogen Dioxide: 1.51 μg/m3
Sulphur Dioxide: 1.81 μg/m3
Ozone: 54.2 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 12:19 AM
Sunset: 6:35 PM
Daylight: 12 hrs 31 mins
Moonrise: 2:38 AM
Moon Transit: 8:23 AM
Moonset: 2:13 PM
Moon Phase: Waning Crescent
Moon Illumination: 12.6%

Best Times for Fishing or Hunting

Major Periods

7:53 AM - 10:23 AM
12:00 AM - 12:00 AM

Minor Periods

1:43 PM - 3:13 PM
2:08 AM - 3:38 AM

Action Rating: 2 out of 5

Monday, April 13, 2026

Weather Forecast

Moderate rain
78.5°F
74.6°F
77.3°F
78%
0.75 in
88%
0%
23.5 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 4.53 μg/m3
PM10: 5.84 μg/m3
Carbon Monoxide: 109.6 μg/m3
Nitrogen Dioxide: 1.71 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 56.69 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 12:19 AM
Sunset: 6:36 PM
Daylight: 12 hrs 32 mins
Moonrise: 3:16 AM
Moon Transit: 9:09 AM
Moonset: 3:07 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.1%

Best Times for Fishing or Hunting

Major Periods

8:39 AM - 11:09 AM
12:00 AM - 12:00 AM

Minor Periods

2:37 PM - 4:07 PM
2:46 AM - 4:16 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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