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

Current Water Temperature

82.6°F

Measurement Time: Monday, June 1, 2026, 2:00 PM 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

84.3°F
Partly cloudy
Partly cloudy
91.9°F
89.9°F
23%
E 20.6 mph
27.8 mph
83.3°F
73.4°F
0 in
25%
10 mi
1016 mbar
0

Five Day Weather Forecast

Partly Cloudy
Wed
H: 83°F
L: 83°F
Patchy rain nearby
Thu
H: 84°F
L: 82°F
Patchy rain nearby
Fri
H: 83°F
L: 82°F
Patchy rain nearby
Sat
H: 83°F
L: 82°F
Partly Cloudy
Sun
H: 83°F
L: 82°F

Air Quality

AQI: 1 - Good
PM2.5: 14.3 μg/m3
PM10: 30 μg/m3
Carbon Monoxide: 90 μg/m3
Nitrogen Dioxide: 0.4 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 53 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 12:25 AM
Sunset: 6:55 PM
Daylight: 12 hrs 59 mins
Moonrise: 7:11 PM
Moon Transit: 12:07 AM
Moonset: 5:48 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:30 PM - 6:00 PM

Minor Periods

6:41 PM - 8:11 PM
5:18 AM - 6:48 AM

Action Rating: 4 out of 5

Heat Advisory issued July 29 at 11:30AM AST until July 29 at 5:00PM AST by NWS San Juan PR

Effective: Wed July 29, 2026, 11:30 AM
Expires: Wed July 29, 2026, 5:00 PM

* WHAT...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. * WHERE...In Puerto Rico, Culebra and Vieques. In Virgin Islands, St Croix and St. Thomas, St. John. * WHEN...Until 5 PM AST this afternoon. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Monitor the latest forecasts and warnings for updates.
Wednesday, July 29, 2026

Weather Forecast

Partly Cloudy
83.4°F
82.5°F
83°F
77%
0.05 in
57%
0%
24.8 mph
9.8


Air Quality

AQI: 1 - Good
PM2.5: 13.62 μg/m3
PM10: 30.97 μg/m3
Carbon Monoxide: 91.42 μg/m3
Nitrogen Dioxide: 0.33 μg/m3
Sulphur Dioxide: 0.28 μg/m3
Ozone: 43.58 μg/m3

Astronomical

Sunrise: 5:56 AM
Sun Transit: 12:25 AM
Sunset: 6:55 PM
Daylight: 12 hrs 59 mins
Moonrise: 7:11 PM
Moon Transit: 12:07 AM
Moonset: 5:48 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:30 PM - 6:00 PM

Minor Periods

6:41 PM - 8:11 PM
5:18 AM - 6:48 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Patchy rain nearby
83.7°F
82.4°F
83.1°F
73%
0.03 in
44%
0%
24.2 mph
9.8


Air Quality

AQI: 1 - Good
PM2.5: 11.21 μg/m3
PM10: 25.85 μg/m3
Carbon Monoxide: 89.38 μg/m3
Nitrogen Dioxide: 0.28 μg/m3
Sulphur Dioxide: 0.26 μg/m3
Ozone: 43.25 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 12:25 AM
Sunset: 6:54 PM
Daylight: 12 hrs 58 mins
Moonrise: 7:48 PM
Moon Transit: 12:54 AM
Moonset: 6:42 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

12:24 AM - 2:54 AM
4:15 PM - 6:45 PM

Minor Periods

7:18 PM - 8:48 PM
6:12 AM - 7:42 AM

Action Rating: 6 out of 5

Friday, July 31, 2026

Weather Forecast

Patchy rain nearby
83.3°F
82°F
82.4°F
73%
0.17 in
70%
0%
21.7 mph
12.2


Air Quality

AQI: 1 - Good
PM2.5: 13.25 μg/m3
PM10: 35.16 μg/m3
Carbon Monoxide: 88.83 μg/m3
Nitrogen Dioxide: 0.3 μg/m3
Sulphur Dioxide: 0.29 μg/m3
Ozone: 37.92 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 12:25 AM
Sunset: 6:54 PM
Daylight: 12 hrs 57 mins
Moonrise: 8:24 PM
Moon Transit: 1:39 AM
Moonset: 7:33 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:09 AM - 3:39 AM
4:58 PM - 7:28 PM

Minor Periods

7:54 PM - 9:24 PM
7:03 AM - 8:33 AM

Action Rating: 3 out of 5

Saturday, August 1, 2026

Weather Forecast

Patchy rain nearby
82.5°F
81.5°F
81.9°F
77%
0.19 in
75%
0%
21 mph
11.9


Air Quality

AQI: 1 - Good
PM2.5: 10.38 μg/m3
PM10: 21.57 μg/m3
Carbon Monoxide: 92.29 μg/m3
Nitrogen Dioxide: 0.35 μg/m3
Sulphur Dioxide: 0.34 μg/m3
Ozone: 37.42 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 12:25 AM
Sunset: 6:54 PM
Daylight: 12 hrs 56 mins
Moonrise: 8:59 PM
Moon Transit: 2:22 AM
Moonset: 8:25 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

1:52 AM - 4:22 AM
12:00 AM - 12:00 AM

Minor Periods

8:29 PM - 9:59 PM
7:55 AM - 9:25 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Partly Cloudy
83°F
81.6°F
82.4°F
74%
0 in
17%
0%
18.6 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 3.26 μg/m3
PM10: 5.81 μg/m3
Carbon Monoxide: 110.78 μg/m3
Nitrogen Dioxide: 0.39 μg/m3
Sulphur Dioxide: 0.27 μg/m3
Ozone: 37.44 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 12:25 AM
Sunset: 6:53 PM
Daylight: 12 hrs 56 mins
Moonrise: 9:33 PM
Moon Transit: 6:50 PM
Moonset: 9:16 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

6:20 PM - 8:50 PM
6:20 PM - 8:50 PM

Minor Periods

9:03 PM - 10:33 PM
8:46 AM - 10:16 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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