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

Current Water Temperature

80.2°F

Measurement Time: Tuesday, February 17, 2026, 12:00 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

77.7°F
Clear
Clear
81.5°F
81.5°F
77%
E 21.3 mph
28.1 mph
77.7°F
70.1°F
0 in
0%
6 mi
1016 mbar
0

Five Day Weather Forecast

Moderate rain
Wed
H: 79°F
L: 75°F
Moderate rain
Thu
H: 80°F
L: 76°F
Sunny
Fri
H: 82°F
L: 77°F
Patchy rain nearby
Sat
H: 78°F
L: 77°F
Patchy rain nearby
Sun
H: 78°F
L: 77°F

Air Quality

PM2.5: 7.65 μg/m3
PM10: 12.15 μg/m3
Carbon Monoxide: 106.85 μg/m3
Nitrogen Dioxide: 1.35 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 12:00 AM
Sunset: 6:30 PM
Daylight: 12 hrs 5 mins
Moonrise: 6:00 AM
Moon Transit: 12:00 AM
Moonset: 6:18 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:48 PM - 7:18 PM
5:30 AM - 7:00 AM

Action Rating: 3 out of 5

Rip Current Statement issued March 17 at 4:45PM AST until March 19 at 6:00PM AST by NWS San Juan PR

Effective: Tue March 17, 2026, 4:45 PM
Expires: Wed March 18, 2026, 6:00 AM

* WHAT...Life-threatening rip currents. * WHERE...Along the exposed beaches in northern, eastern and southern Puerto Rico, Culebra, Vieques, and the US Virgin Islands. * 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, March 18, 2026

Weather Forecast

Moderate rain
79.3°F
75.2°F
77.2°F
78%
0.25 in
75%
0%
22.1 mph
2.8


Air Quality

AQI: 1 - Good
PM2.5: 7.22 μg/m3
PM10: 11.36 μg/m3
Carbon Monoxide: 109.73 μg/m3
Nitrogen Dioxide: 1.3 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 79.08 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 12:00 AM
Sunset: 6:30 PM
Daylight: 12 hrs 5 mins
Moonrise: 6:00 AM
Moon Transit: 12:00 AM
Moonset: 6:18 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

5:48 PM - 7:18 PM
5:30 AM - 7:00 AM

Action Rating: 3 out of 5

Thursday, March 19, 2026

Weather Forecast

Moderate rain
79.7°F
76.3°F
77.4°F
79%
0.37 in
89%
0%
18.1 mph
2.9


Air Quality

AQI: 1 - Good
PM2.5: 6.7 μg/m3
PM10: 10.26 μg/m3
Carbon Monoxide: 110.25 μg/m3
Nitrogen Dioxide: 1.35 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 68.64 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 12:00 AM
Sunset: 6:30 PM
Daylight: 12 hrs 6 mins
Moonrise: 6:38 AM
Moon Transit: 1:31 AM
Moonset: 7:15 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

1:01 AM - 3:31 AM
1:01 AM - 3:31 AM

Minor Periods

6:45 PM - 8:15 PM
6:08 AM - 7:38 AM

Action Rating: 5 out of 5

Friday, March 20, 2026

Weather Forecast

Sunny
82.4°F
76.8°F
78.4°F
81%
0 in
0%
0%
15.4 mph
2.7


Air Quality

AQI: 1 - Good
PM2.5: 5.8 μg/m3
PM10: 8.42 μg/m3
Carbon Monoxide: 109.63 μg/m3
Nitrogen Dioxide: 1.51 μg/m3
Sulphur Dioxide: 2.17 μg/m3
Ozone: 60.04 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 10:27 AM
Sunset: 6:30 PM
Daylight: 12 hrs 7 mins
Moonrise: 7:17 AM
Moon Transit: 1:42 PM
Moonset: 8:14 PM
Moon Phase: New
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

4:16 AM - 6:46 AM
1:12 PM - 3:42 PM

Minor Periods

7:44 PM - 9:14 PM
6:47 AM - 8:17 AM

Action Rating: 5 out of 5

Saturday, March 21, 2026

Weather Forecast

Patchy rain nearby
78.3°F
76.9°F
77.6°F
73%
0.04 in
84%
0%
8.9 mph
2.8


Air Quality

AQI: 1 - Good
PM2.5: 5.68 μg/m3
PM10: 8.11 μg/m3
Carbon Monoxide: 110.08 μg/m3
Nitrogen Dioxide: 1.7 μg/m3
Sulphur Dioxide: 2.1 μg/m3
Ozone: 57.54 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 12:00 AM
Sunset: 6:31 PM
Daylight: 12 hrs 8 mins
Moonrise: 7:59 AM
Moon Transit: 2:35 PM
Moonset: 9:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

5:07 AM - 7:37 AM
2:05 PM - 4:35 PM

Minor Periods

8:46 PM - 10:16 PM
7:29 AM - 8:59 AM

Action Rating: 2 out of 5

Sunday, March 22, 2026

Weather Forecast

Patchy rain nearby
78°F
77°F
77.4°F
74%
0 in
0%
0%
13.6 mph
0.2


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:22 AM
Sun Transit: 12:00 AM
Sunset: 6:31 PM
Daylight: 12 hrs 9 mins
Moonrise: 8:46 AM
Moon Transit: 3:31 PM
Moonset: 10:22 PM
Moon Phase: Waxing Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

6:02 AM - 8:32 AM
3:01 PM - 5:31 PM

Minor Periods

9:52 PM - 11:22 PM
8:16 AM - 9:46 AM

Action Rating: 3 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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