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

Current Water Temperature

80.8°F

Measurement Time: Tuesday, February 3, 2026, 4:00 AM AST

Temperature Locations

View Nearby Locations     View All US Virgin Islands Locations     View Locations Near Me

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

75.4°F
Light rain
Light rain
80.1°F
81.5°F
89%
NE 28.9 mph
41 mph
76.3°F
74.7°F
0 in
100%
1 mi
1018 mbar
0

Five Day Weather Forecast

Moderate rain
Tue
H: 77°F
L: 76°F
Heavy rain
Wed
H: 78°F
L: 76°F
Patchy rain nearby
Thu
H: 80°F
L: 78°F
Sunny
Fri
H: 83°F
L: 77°F
Moderate rain
Sat
H: 79°F
L: 77°F

Air Quality

AQI: 1 - Good
PM2.5: 6.55 μg/m3
PM10: 10.15 μg/m3
Carbon Monoxide: 134.85 μg/m3
Nitrogen Dioxide: 1.35 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 95 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:32 AM
Sunset: 6:15 PM
Daylight: 11 hrs 23 mins
Moonrise: 8:06 PM
Moon Transit: 1:39 AM
Moonset: 8:05 AM
Moon Phase: Full
Moon Illumination: 96.3%

Best Times for Fishing or Hunting

Major Periods

1:09 AM - 3:39 AM
5:01 PM - 7:31 PM

Minor Periods

7:36 PM - 9:06 PM
7:35 AM - 9:05 AM

Action Rating: 3 out of 5

Coastal Flood Advisory issued February 3 at 10:18AM AST until February 4 at 6:00AM AST by NWS San Juan PR

Effective: Tue February 3, 2026, 10:18 AM
Expires: Tue February 3, 2026, 6:30 PM

* WHAT...For the Coastal Flood Advisory, moderate coastal flooding, particularly through this evening. For the High Surf Advisory, between 15 to 18 feet today. For the High Rip Current Risk, life- threatening rip currents. * WHERE....Beaches of western to northeastern Puerto Rico, Culebra, St. Thomas, and St. John. The most vulnerable areas for high surf and beach erosion include Pinones along road 187, Parcelas Suarez, Villas del Mar, and Villa Cristiana in Loiza; Fortuna in Luquillo; Pueblo and Tamarindo in Aguadilla; Barrio Obrero, Pueblo and Jarealito in Arecibo; La Boca in Barceloneta; Machuca in Manati; Puerto Nuevo in Vega Baja; Ocean Park in San Juan; and Barrio Espinal in Aguada. * WHEN...For the High Surf Advisory, through 6 AM AST Wednesday morning. For the Coastal Flood Advisory, through 6 AM AST Wednesday. For the High Rip Current Risk, through late Wednesday night. * IMPACTS...Rip currents that can sweep even the best swimmers away from shore into deeper water where it becomes difficult to return to safety. 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 some beach erosion with only minor damage possible to dune structure. 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. * The next high tides are expected as follows: In San Juan, 1.49 feet at 10:29 AM AST and 1.07 feet at 10:13 PM AST; in Carolina/Loiza, 1.36 feet at 10:33 AM AST and 0.97 feet at 10:36 PM AST; and 1.30 feet at 9:53 PM AST and 0.91 feet at 9:38 PM AST; in Mayaguez, 1.35 feet at 10:01 AM AST and 1.03 feet at 10:09 PM AST; in Botany Bay, St. Thomas, 1.32 feet at 10:16 AM AST and 1.03 feet at 10:18 PM AST.

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. 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.


High Surf Advisory issued February 3 at 10:18AM AST until February 4 at 6:00AM AST by NWS San Juan PR

Effective: Tue February 3, 2026, 10:18 AM
Expires: Tue February 3, 2026, 6:30 PM

* WHAT...For the Coastal Flood Advisory, moderate coastal flooding, particularly through this evening. For the High Surf Advisory, between 15 to 18 feet today. For the High Rip Current Risk, life- threatening rip currents. * WHERE....Beaches of western to northeastern Puerto Rico, Culebra, St. Thomas, and St. John. The most vulnerable areas for high surf and beach erosion include Pinones along road 187, Parcelas Suarez, Villas del Mar, and Villa Cristiana in Loiza; Fortuna in Luquillo; Pueblo and Tamarindo in Aguadilla; Barrio Obrero, Pueblo and Jarealito in Arecibo; La Boca in Barceloneta; Machuca in Manati; Puerto Nuevo in Vega Baja; Ocean Park in San Juan; and Barrio Espinal in Aguada. * WHEN...For the High Surf Advisory, through 6 AM AST Wednesday morning. For the Coastal Flood Advisory, through 6 AM AST Wednesday. For the High Rip Current Risk, through late Wednesday night. * IMPACTS...Rip currents that can sweep even the best swimmers away from shore into deeper water where it becomes difficult to return to safety. 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 some beach erosion with only minor damage possible to dune structure. 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. * The next high tides are expected as follows: In San Juan, 1.49 feet at 10:29 AM AST and 1.07 feet at 10:13 PM AST; in Carolina/Loiza, 1.36 feet at 10:33 AM AST and 0.97 feet at 10:36 PM AST; and 1.30 feet at 9:53 PM AST and 0.91 feet at 9:38 PM AST; in Mayaguez, 1.35 feet at 10:01 AM AST and 1.03 feet at 10:09 PM AST; in Botany Bay, St. Thomas, 1.32 feet at 10:16 AM AST and 1.03 feet at 10:18 PM AST.

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. 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 February 3 at 10:18AM AST until February 5 at 6:00AM AST by NWS San Juan PR

Effective: Tue February 3, 2026, 10:18 AM
Expires: Tue February 3, 2026, 6:30 PM

* WHAT...For the Coastal Flood Advisory, moderate coastal flooding, particularly through this evening. For the High Surf Advisory, between 15 to 18 feet today. For the High Rip Current Risk, life- threatening rip currents. * WHERE....Beaches of western to northeastern Puerto Rico, Culebra, St. Thomas, and St. John. The most vulnerable areas for high surf and beach erosion include Pinones along road 187, Parcelas Suarez, Villas del Mar, and Villa Cristiana in Loiza; Fortuna in Luquillo; Pueblo and Tamarindo in Aguadilla; Barrio Obrero, Pueblo and Jarealito in Arecibo; La Boca in Barceloneta; Machuca in Manati; Puerto Nuevo in Vega Baja; Ocean Park in San Juan; and Barrio Espinal in Aguada. * WHEN...For the High Surf Advisory, through 6 AM AST Wednesday morning. For the Coastal Flood Advisory, through 6 AM AST Wednesday. For the High Rip Current Risk, through late Wednesday night. * IMPACTS...Rip currents that can sweep even the best swimmers away from shore into deeper water where it becomes difficult to return to safety. 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 some beach erosion with only minor damage possible to dune structure. 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. * The next high tides are expected as follows: In San Juan, 1.49 feet at 10:29 AM AST and 1.07 feet at 10:13 PM AST; in Carolina/Loiza, 1.36 feet at 10:33 AM AST and 0.97 feet at 10:36 PM AST; and 1.30 feet at 9:53 PM AST and 0.91 feet at 9:38 PM AST; in Mayaguez, 1.35 feet at 10:01 AM AST and 1.03 feet at 10:09 PM AST; in Botany Bay, St. Thomas, 1.32 feet at 10:16 AM AST and 1.03 feet at 10:18 PM AST.

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. 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 February 3 at 10:18AM AST until February 4 at 6:00PM AST by NWS San Juan PR

Effective: Tue February 3, 2026, 10:18 AM
Expires: Tue February 3, 2026, 6:30 PM

* WHAT...Life-threatening rip currents. * WHERE...Beaches of Vieques and St. Croix. * WHEN...From Tuesday morning 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.


Tuesday, February 3, 2026

Weather Forecast

Moderate rain
77.4°F
75.6°F
76.8°F
91%
0.32 in
85%
0%
30.4 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 8.18 μg/m3
PM10: 12.48 μg/m3
Carbon Monoxide: 134.29 μg/m3
Nitrogen Dioxide: 1.43 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 91.04 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:32 AM
Sunset: 6:15 PM
Daylight: 11 hrs 23 mins
Moonrise: 8:06 PM
Moon Transit: 1:39 AM
Moonset: 8:05 AM
Moon Phase: Full
Moon Illumination: 96.3%

Best Times for Fishing or Hunting

Major Periods

1:09 AM - 3:39 AM
5:01 PM - 7:31 PM

Minor Periods

7:36 PM - 9:06 PM
7:35 AM - 9:05 AM

Action Rating: 3 out of 5

Wednesday, February 4, 2026

Weather Forecast

Heavy rain
78.3°F
76.3°F
77.7°F
84%
1.22 in
81%
0%
25.7 mph
1.8


Air Quality

AQI: 1 - Good
PM2.5: 6.58 μg/m3
PM10: 10.16 μg/m3
Carbon Monoxide: 132.25 μg/m3
Nitrogen Dioxide: 1.28 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 90.72 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:32 AM
Sunset: 6:15 PM
Daylight: 11 hrs 24 mins
Moonrise: 8:59 PM
Moon Transit: 2:26 AM
Moonset: 8:42 AM
Moon Phase: Full
Moon Illumination: 90.9%

Best Times for Fishing or Hunting

Major Periods

1:56 AM - 4:26 AM
5:46 PM - 8:16 PM

Minor Periods

8:29 PM - 9:59 PM
8:12 AM - 9:42 AM

Action Rating: 4 out of 5

Thursday, February 5, 2026

Weather Forecast

Patchy rain nearby
80.4°F
77.7°F
78.7°F
80%
0.16 in
86%
0%
13.4 mph
2.1


Air Quality

AQI: 1 - Good
PM2.5: 5.25 μg/m3
PM10: 7.78 μg/m3
Carbon Monoxide: 101.69 μg/m3
Nitrogen Dioxide: 1.36 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 78.8 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:33 AM
Sunset: 6:16 PM
Daylight: 11 hrs 25 mins
Moonrise: 9:50 PM
Moon Transit: 3:09 AM
Moonset: 9:16 AM
Moon Phase: Waning Gibbous
Moon Illumination: 83.4%

Best Times for Fishing or Hunting

Major Periods

2:39 AM - 5:09 AM
6:28 PM - 8:58 PM

Minor Periods

9:20 PM - 10:50 PM
8:46 AM - 10:16 AM

Action Rating: 3 out of 5

Friday, February 6, 2026

Weather Forecast

Sunny
82.8°F
77.2°F
79°F
77%
0 in
0%
0%
14.1 mph
2.1


Air Quality

AQI: 1 - Good
PM2.5: 9.28 μg/m3
PM10: 12.84 μg/m3
Carbon Monoxide: 102.05 μg/m3
Nitrogen Dioxide: 1.54 μg/m3
Sulphur Dioxide: 3.49 μg/m3
Ozone: 65.52 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 12:33 AM
Sunset: 6:16 PM
Daylight: 11 hrs 25 mins
Moonrise: 10:41 PM
Moon Transit: 3:52 AM
Moonset: 9:50 AM
Moon Phase: Waning Gibbous
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

3:22 AM - 5:52 AM
7:11 PM - 9:41 PM

Minor Periods

10:11 PM - 11:41 PM
9:20 AM - 10:50 AM

Action Rating: 2 out of 5

Saturday, February 7, 2026

Weather Forecast

Moderate rain
78.5°F
76.6°F
78.1°F
73%
0.39 in
78%
0%
11 mph
2.2


Air Quality

AQI: 1 - Good
PM2.5: 5.11 μg/m3
PM10: 6.83 μg/m3
Carbon Monoxide: 114.98 μg/m3
Nitrogen Dioxide: 1.92 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 66.69 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 12:33 AM
Sunset: 6:17 PM
Daylight: 11 hrs 26 mins
Moonrise: 11:31 PM
Moon Transit: 4:34 AM
Moonset: 10:25 AM
Moon Phase: Waning Gibbous
Moon Illumination: 63.7%

Best Times for Fishing or Hunting

Major Periods

4:04 AM - 6:34 AM
7:53 PM - 10:23 PM

Minor Periods

12:00 AM - 12:00 AM
9:55 AM - 11:25 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.

Webcams Near St. John, VI

Sponsored Content