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

Current Water Temperature

81.7°F

Measurement Time: Thursday, April 30, 2026, 7:00 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

80.8°F
Overcast
Overcast
85.2°F
83.5°F
62%
E 22.1 mph
29.3 mph
79.6°F
69.8°F
0 in
100%
9 mi
1017 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 81°F
L: 80°F
Patchy rain nearby
Tue
H: 81°F
L: 80°F
Moderate rain
Wed
H: 80°F
L: 79°F
Patchy rain nearby
Thu
H: 81°F
L: 79°F
Patchy rain nearby
Fri
H: 81°F
L: 80°F

Air Quality

AQI: 1 - Good
PM2.5: 12.15 μg/m3
PM10: 20.15 μg/m3
Carbon Monoxide: 103.85 μg/m3
Nitrogen Dioxide: 1.15 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 58 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:16 AM
Sunset: 6:49 PM
Daylight: 13 hrs 6 mins
Moonrise: 2:14 PM
Moon Transit: 8:19 PM
Moonset: 1:47 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

10:56 AM - 1:26 PM
7:49 PM - 10:19 PM

Minor Periods

1:44 PM - 3:14 PM
1:17 AM - 2:47 AM

Action Rating: 2 out of 5

Rip Current Statement issued May 24 at 4:00PM AST until May 26 at 6:00AM AST by NWS San Juan PR

Effective: Sun May 24, 2026, 4:00 PM
Expires: Mon May 25, 2026, 6:00 AM

* WHAT...Life-threatening rip current. * WHERE...Exposed beaches of northern and southeastern Puerto Rico, Vieques, Culebra, and all the U.S. Virgin Islands. * WHEN...Through late Monday night. * 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.


Wind Advisory issued May 25 at 1:12AM AST until May 25 at 8:00PM AST by NWS San Juan PR

Effective: Mon May 25, 2026, 1:12 AM
Expires: Mon May 25, 2026, 12:00 PM

* WHAT...East winds up to 25 mph with gusts up to 40 mph expected, particularly across the U.S. Virgin Islands and eastern Puerto Rico. * WHERE...Puerto Rico and Virgin Islands. * WHEN...Until 8 PM AST this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects.


Rip Current Statement issued May 24 at 9:18PM AST until May 26 at 6:00AM AST by NWS San Juan PR

Effective: Sun May 24, 2026, 9:18 PM
Expires: Mon May 25, 2026, 5:30 AM

* WHAT...Life-threatening rip current. * WHERE...Exposed beaches of northern and southeastern Puerto Rico, Vieques, Culebra, and all the U.S. Virgin Islands. * WHEN...Through late Monday night. * 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.


Monday, May 25, 2026

Weather Forecast

Patchy rain nearby
80.5°F
79.6°F
80.1°F
74%
0.06 in
87%
0%
25.7 mph
11.7


Air Quality

AQI: 1 - Good
PM2.5: 11.41 μg/m3
PM10: 18.91 μg/m3
Carbon Monoxide: 104.57 μg/m3
Nitrogen Dioxide: 1.15 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 57.8 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:16 AM
Sunset: 6:49 PM
Daylight: 13 hrs 6 mins
Moonrise: 2:14 PM
Moon Transit: 8:19 PM
Moonset: 1:47 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

10:56 AM - 1:26 PM
7:49 PM - 10:19 PM

Minor Periods

1:44 PM - 3:14 PM
1:17 AM - 2:47 AM

Action Rating: 2 out of 5

Tuesday, May 26, 2026

Weather Forecast

Patchy rain nearby
80.6°F
80.2°F
80.4°F
77%
0.16 in
89%
0%
25.5 mph
8.4


Air Quality

AQI: 1 - Good
PM2.5: 11.88 μg/m3
PM10: 19.61 μg/m3
Carbon Monoxide: 108.69 μg/m3
Nitrogen Dioxide: 1.2 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 59.64 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:16 AM
Sunset: 6:50 PM
Daylight: 13 hrs 7 mins
Moonrise: 3:03 PM
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 PM
8:31 PM - 11:01 PM

Minor Periods

2:33 PM - 4:03 PM
1:51 AM - 3:21 AM

Action Rating: 2 out of 5

Wednesday, May 27, 2026

Weather Forecast

Moderate rain
80.1°F
78.9°F
79.4°F
80%
0.25 in
88%
0%
20.8 mph
2.7


Air Quality

AQI: 1 - Good
PM2.5: 5.63 μg/m3
PM10: 9.1 μg/m3
Carbon Monoxide: 106.21 μg/m3
Nitrogen Dioxide: 1.29 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 51.8 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:16 AM
Sunset: 6:50 PM
Daylight: 13 hrs 7 mins
Moonrise: 3:53 PM
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 PM
9:13 PM - 11:43 PM

Minor Periods

3:23 PM - 4:53 PM
2:25 AM - 3:55 AM

Action Rating: 2 out of 5

Thursday, May 28, 2026

Weather Forecast

Patchy rain nearby
80.5°F
78.5°F
79.7°F
78%
0.04 in
87%
0%
17.9 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 7.91 μg/m3
PM10: 14.15 μg/m3
Carbon Monoxide: 107.63 μg/m3
Nitrogen Dioxide: 1.33 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 51.44 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:16 AM
Sunset: 6:50 PM
Daylight: 13 hrs 8 mins
Moonrise: 4:45 PM
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 PM
12:00 AM - 12:00 AM

Minor Periods

4:15 PM - 5:45 PM
3:00 AM - 4:30 AM

Action Rating: 2 out of 5

Friday, May 29, 2026

Weather Forecast

Patchy rain nearby
81.4°F
80.2°F
80.8°F
80%
0.06 in
88%
0%
21.5 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 11.4 μg/m3
PM10: 22.51 μg/m3
Carbon Monoxide: 110.98 μg/m3
Nitrogen Dioxide: 1.43 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 54.15 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 12:16 AM
Sunset: 6:51 PM
Daylight: 13 hrs 8 mins
Moonrise: 5:37 PM
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 PM
12:00 AM - 12:00 AM

Minor Periods

5:07 PM - 6:37 PM
3:39 AM - 5:09 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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