Water Temperature of the Caribbean Sea in St. John, VI
Current Water Temperature
Measurement Time: Thursday, April 30, 2026, 7:00 AM AST
Temperature Locations
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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

Five Day Weather Forecast

Tue
H: 81°F
L: 80°F

Wed
H: 81°F
L: 80°F

Thu
H: 81°F
L: 80°F

Fri
H: 82°F
L: 80°F

Sat
H: 82°F
L: 81°F
Air Quality
Nitrogen Dioxide: 1.25 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 63 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 6:50 PM
Daylight: 13 hrs 7 mins
Moon Transit: 9:01 PM
Moonset: 2:21 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%
Best Times for Fishing or Hunting
Major Periods
11:37 AM - 2:07 PM8:31 PM - 11:01 PM
Minor Periods
2:33 PM - 4:03 PM1:51 AM - 3:21 AM
Action Rating: 2 out of 5
Rip Current Statement issued May 25 at 4:19PM AST until May 27 at 6:00AM AST by NWS San Juan PR
Effective: Mon May 25, 2026, 4:19 PM
Expires: Tue May 26, 2026, 6:00 AM
* WHAT...Life-threatening rip currents. * WHERE...Exposed beaches of northern, eastern, and southeastern Puerto Rico, Vieques, Culebra, and all the U.S. Virgin Islands. * WHEN...Through Tuesday 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.
Rip Current Statement issued May 25 at 9:33PM AST until May 27 at 6:00AM AST by NWS San Juan PR
Effective: Mon May 25, 2026, 9:33 PM
Expires: Tue May 26, 2026, 5:45 AM
* WHAT...Life-threatening rip currents. * WHERE...Exposed beaches of northern, eastern, and southeastern Puerto Rico, Vieques, Culebra, and all the U.S. Virgin Islands. * WHEN...Through Tuesday 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.
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.21 μg/m3
Sulphur Dioxide: 1.06 μg/m3
Ozone: 61.92 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 6:50 PM
Daylight: 13 hrs 7 mins
Moon Transit: 9:01 PM
Moonset: 2:21 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%
Best Times for Fishing or Hunting
Major Periods
11:37 AM - 2:07 PM8:31 PM - 11:01 PM
Minor Periods
2:33 PM - 4:03 PM1:51 AM - 3:21 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.18 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 67.44 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 6:50 PM
Daylight: 13 hrs 7 mins
Moon Transit: 9:43 PM
Moonset: 2:55 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%
Best Times for Fishing or Hunting
Major Periods
12:20 AM - 2:50 PM9:13 PM - 11:43 PM
Minor Periods
3:23 PM - 4:53 PM2:25 AM - 3:55 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.2 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 67.8 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 6:50 PM
Daylight: 13 hrs 8 mins
Moon Transit: 10:28 PM
Moonset: 3:30 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.7%
Best Times for Fishing or Hunting
Major Periods
1:03 PM - 3:33 PM12:00 AM - 12:00 AM
Minor Periods
4:15 PM - 5:45 PM3:00 AM - 4:30 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.3 μg/m3
Sulphur Dioxide: 1.66 μg/m3
Ozone: 55.96 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 6:51 PM
Daylight: 13 hrs 8 mins
Moon Transit: 11:14 PM
Moonset: 4:09 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.4%
Best Times for Fishing or Hunting
Major Periods
1:49 PM - 4:19 PM12:00 AM - 12:00 AM
Minor Periods
5:07 PM - 6:37 PM3:39 AM - 5:09 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.43 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 42.38 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 6:51 PM
Daylight: 13 hrs 9 mins
Moon Transit: 12:00 AM
Moonset: 4:51 AM
Moon Phase: Full
Moon Illumination: 99.8%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM2:37 PM - 5:07 PM
Minor Periods
6:01 PM - 7:31 PM4:21 AM - 5:51 AM
Action Rating: 4 out of 5
