Water Temperature of the Caribbean Sea in St. John, VI
Current Water Temperature
Measurement Time: Wednesday, February 4, 2026, 8:00 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

Mon
H: 79°F
L: 77°F

Tue
H: 77°F
L: 75°F

Wed
H: 78°F
L: 76°F

Thu
H: 78°F
L: 77°F

Fri
H: 79°F
L: 78°F
Air Quality
Nitrogen Dioxide: 1.25 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 93 μg/m3
Astronomical
Sun Transit: 12:33 AM
Sunset: 6:18 PM
Daylight: 11 hrs 28 mins
Moon Transit: 6:03 AM
Moonset: 11:40 AM
Moon Phase: Last Quarter
Moon Illumination: 41.2%
Best Times for Fishing or Hunting
Major Periods
5:33 AM - 8:03 AM9:25 PM - 11:55 PM
Minor Periods
11:10 AM - 12:40 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Coastal Flood Advisory issued February 9 at 4:21AM AST until February 10 at 6:00PM AST by NWS San Juan PR
Effective: Mon February 9, 2026, 4:21 AM
Expires: Mon February 9, 2026, 6:00 PM
* WHAT...For the Coastal Flood Advisory, minor coastal flooding. For the High Surf Advisory, large breaking waves up to 15 feet. For the High Rip Current Risk, life-threatening rip currents. * WHERE...For the Coastal Flood and High Surf Advisories, the most vulnerable areas for high surf and beach erosion include Barrio Espinal in Aguada. Beaches of western PR, Culebra, St. Thomas, and St. John. For the High Rip Current Risk, all western and northern coasts of Puerto Rico, Culebra, and the northern USVI. * WHEN...For the Coastal Flood and High Surf advisories, from 6 AM Monday to 6 PM AST Tuesday. For the High Rip Current Risk, through Wednesday afternoon. * IMPACTS...For the Coastal Flood Advisory, shallow flooding of vulnerable areas will result in a limited threat of property and structural damage near the waterfront and shoreline, with a higher threat near the time of high tide. Isolated road closures are possible. For the High Surf Advisory, high waves that can wash over jetties and sweep people and pets onto jagged rocks. Rough surf may also knock you down. Large breaking waves will result in localized beach/dune structure erosion and dangerous swimming conditions. For the High Rip Current Risk, rip currents can sweep even the best swimmers away from shore into deeper water, where it becomes difficult to return to safety. * ADDITIONAL DETAILS...The next high tides are expected as follows: Culebra, 1:04 PM AST this afternoon at 0.42 feet; Charlotte Amalie, at 5:02 AM AST this afternoon at 0.53 feet on Tuesday; and Mayaguez 2:00 PM AST this afternoon at 0.59 feet.
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. A High Surf Advisory means that high surf will affect beaches in the advisory area, producing localized beach erosion and dangerous swimming conditions. A Coastal Flood Advisory indicates that onshore winds and tides will combine to generate flooding of low areas along the shore.
High Surf Advisory issued February 9 at 4:21AM AST until February 10 at 6:00PM AST by NWS San Juan PR
Effective: Mon February 9, 2026, 4:21 AM
Expires: Mon February 9, 2026, 6:00 PM
* WHAT...For the Coastal Flood Advisory, minor coastal flooding. For the High Surf Advisory, large breaking waves up to 15 feet. For the High Rip Current Risk, life-threatening rip currents. * WHERE...For the Coastal Flood and High Surf Advisories, the most vulnerable areas for high surf and beach erosion include Barrio Espinal in Aguada. Beaches of western PR, Culebra, St. Thomas, and St. John. For the High Rip Current Risk, all western and northern coasts of Puerto Rico, Culebra, and the northern USVI. * WHEN...For the Coastal Flood and High Surf advisories, from 6 AM Monday to 6 PM AST Tuesday. For the High Rip Current Risk, through Wednesday afternoon. * IMPACTS...For the Coastal Flood Advisory, shallow flooding of vulnerable areas will result in a limited threat of property and structural damage near the waterfront and shoreline, with a higher threat near the time of high tide. Isolated road closures are possible. For the High Surf Advisory, high waves that can wash over jetties and sweep people and pets onto jagged rocks. Rough surf may also knock you down. Large breaking waves will result in localized beach/dune structure erosion and dangerous swimming conditions. For the High Rip Current Risk, rip currents can sweep even the best swimmers away from shore into deeper water, where it becomes difficult to return to safety. * ADDITIONAL DETAILS...The next high tides are expected as follows: Culebra, 1:04 PM AST this afternoon at 0.42 feet; Charlotte Amalie, at 5:02 AM AST this afternoon at 0.53 feet on Tuesday; and Mayaguez 2:00 PM AST this afternoon at 0.59 feet.
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. A High Surf Advisory means that high surf will affect beaches in the advisory area, producing localized beach erosion and dangerous swimming conditions. A Coastal Flood Advisory indicates that onshore winds and tides will combine to generate flooding of low areas along the shore.
Rip Current Statement issued February 9 at 4:21AM AST until February 11 at 6:00PM AST by NWS San Juan PR
Effective: Mon February 9, 2026, 4:21 AM
Expires: Mon February 9, 2026, 6:00 PM
* WHAT...For the Coastal Flood Advisory, minor coastal flooding. For the High Surf Advisory, large breaking waves up to 15 feet. For the High Rip Current Risk, life-threatening rip currents. * WHERE...For the Coastal Flood and High Surf Advisories, the most vulnerable areas for high surf and beach erosion include Barrio Espinal in Aguada. Beaches of western PR, Culebra, St. Thomas, and St. John. For the High Rip Current Risk, all western and northern coasts of Puerto Rico, Culebra, and the northern USVI. * WHEN...For the Coastal Flood and High Surf advisories, from 6 AM Monday to 6 PM AST Tuesday. For the High Rip Current Risk, through Wednesday afternoon. * IMPACTS...For the Coastal Flood Advisory, shallow flooding of vulnerable areas will result in a limited threat of property and structural damage near the waterfront and shoreline, with a higher threat near the time of high tide. Isolated road closures are possible. For the High Surf Advisory, high waves that can wash over jetties and sweep people and pets onto jagged rocks. Rough surf may also knock you down. Large breaking waves will result in localized beach/dune structure erosion and dangerous swimming conditions. For the High Rip Current Risk, rip currents can sweep even the best swimmers away from shore into deeper water, where it becomes difficult to return to safety. * ADDITIONAL DETAILS...The next high tides are expected as follows: Culebra, 1:04 PM AST this afternoon at 0.42 feet; Charlotte Amalie, at 5:02 AM AST this afternoon at 0.53 feet on Tuesday; and Mayaguez 2:00 PM AST this afternoon at 0.59 feet.
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. A High Surf Advisory means that high surf will affect beaches in the advisory area, producing localized beach erosion and dangerous swimming conditions. A Coastal Flood Advisory indicates that onshore winds and tides will combine to generate flooding of low areas along the shore.
Rip Current Statement issued February 9 at 4:21AM AST until February 11 at 6:00PM AST by NWS San Juan PR
Effective: Mon February 9, 2026, 4:21 AM
Expires: Mon February 9, 2026, 6:00 PM
* WHAT...Life-threatening rip currents. * WHERE...Beaches of southwestern Puerto Rico, Vieques, and St. Croix. * 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.
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.28 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 94.76 μg/m3
Astronomical
Sun Transit: 12:33 AM
Sunset: 6:18 PM
Daylight: 11 hrs 28 mins
Moon Transit: 6:03 AM
Moonset: 11:40 AM
Moon Phase: Last Quarter
Moon Illumination: 41.2%
Best Times for Fishing or Hunting
Major Periods
5:33 AM - 8:03 AM9:25 PM - 11:55 PM
Minor Periods
11:10 AM - 12:40 AM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.23 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 91.48 μg/m3
Astronomical
Sun Transit: 12:33 AM
Sunset: 6:18 PM
Daylight: 11 hrs 29 mins
Moon Transit: 6:50 AM
Moonset: 12:24 AM
Moon Phase: Last Quarter
Moon Illumination: 30.3%
Best Times for Fishing or Hunting
Major Periods
6:20 AM - 8:50 AM12:00 AM - 12:00 AM
Minor Periods
11:54 AM - 1:24 PM12:46 AM - 2:16 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.17 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 89.36 μg/m3
Astronomical
Sun Transit: 12:33 AM
Sunset: 6:19 PM
Daylight: 11 hrs 30 mins
Moon Transit: 7:40 AM
Moonset: 1:11 PM
Moon Phase: Last Quarter
Moon Illumination: 20.5%
Best Times for Fishing or Hunting
Major Periods
7:10 AM - 9:40 AM12:00 AM - 12:00 AM
Minor Periods
12:41 AM - 2:11 PM1:39 AM - 3:09 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.37 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 73.92 μg/m3
Astronomical
Sun Transit: 12:33 AM
Sunset: 6:19 PM
Daylight: 11 hrs 31 mins
Moon Transit: 8:32 AM
Moonset: 2:02 PM
Moon Phase: Waning Crescent
Moon Illumination: 12.2%
Best Times for Fishing or Hunting
Major Periods
8:02 AM - 10:32 AM12:00 AM - 12:00 AM
Minor Periods
1:32 PM - 3:02 PM2:33 AM - 4:03 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 1.83 μg/m3
Sulphur Dioxide: 1.66 μg/m3
Ozone: 54.54 μg/m3
Astronomical
Sun Transit: 12:33 AM
Sunset: 6:19 PM
Daylight: 11 hrs 32 mins
Moon Transit: 9:24 AM
Moonset: 2:57 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.8%
Best Times for Fishing or Hunting
Major Periods
8:54 AM - 11:24 AM12:00 AM - 12:00 AM
Minor Periods
2:27 PM - 3:57 PM3:24 AM - 4:54 AM
Action Rating: 2 out of 5
