Saint John, United States Virgin Islands
Caribbean Sea18.30°N, 64.70°WStation UN-SAI-BLU

Blue Cobblestone Beach Sea Water Temperature

A tropical beach on the Caribbean Sea, warmest around September at about 29.2°C. Today's reading, 7-day forecast, and monthly averages below.

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Water Temperature NowBuoy & Sentinel-3 SST

Blue Cobblestone Beach water temperature

29.2
84.6°FTropical Warm (> 28°C)

Very warm bath-like water. Zero chill, exceptional for relaxation and snorkeling.

+0°vs Sep avgCaribbean Sea18.30°N, 64.70°W
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
31°C
87.3°F onshore
Wind Speed
12 km/h
Surface wind
Wave Height
0.8 m
Slight shore chop
Swell
0.6 m
Deep water swell
Wave Period
6 s
Peak interval
UV Index
—
Daily maximum
Sunrise
—
First morning light
Sunset
—
Golden hour close

7-Day Water Temperature Forecast

Open-Meteo ocean model
Today
WedSep 30
29.2°C
84.6°F
Waves: 1m
Tropical
ThuOct 1
29.5°C
85.1°F
Waves: 0.9m
Tropical
FriOct 2
29.6°C
85.3°F
Waves: 0.7m
Tropical
SatOct 3
29.5°C
85.1°F
Waves: 0.6m
Tropical
SunOct 4
29.2°C
84.6°F
Waves: 0.7m
Tropical
MonOct 5
28.9°C
84°F
Waves: 0.9m
Tropical
TueOct 6
28.8°C
83.8°F
Waves: 1m
Tropical
Forecast cooling trend: -0.4°C over 7 days at Blue Cobblestone Beach.
Confidence: High

Blue Cobblestone Beach Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in Blue Cobblestone Beach occurs inJanuary, February, March, April, May, June, July, August, September, October, November, December — peaking at29.2°C (84.6°F) in September.

Year-Round Water Temperature Curve (°C / °F)

Hover a bar for details
Current month Comfortable (20–24°C) Warm (24°C+) Cool (<20°C)
27
Jan
26
Feb
26
Mar
27
Apr
28
May
28
Jun
28
Jul
29
Aug
Current
29
Sep
29
Oct
28
Nov
27
Dec
Full 12-month data table — min / avg / max & swimming comfort
MonthMin Water TempAverage Water TempMax Water TempSwimming Comfort
January25.5°C26.5°C27.3°CWarm & Ideal (24°C – 28°C)
February25.5°C26.3°C27.1°CWarm & Ideal (24°C – 28°C)
March24.9°C26.3°C27.2°CWarm & Ideal (24°C – 28°C)
April25.9°C26.7°C27.7°CWarm & Ideal (24°C – 28°C)
May26.4°C27.5°C28.6°CWarm & Ideal (24°C – 28°C)
June27.3°C28.1°C29.2°CTropical Warm (> 28°C)
July26.8°C28.4°C29.5°CTropical Warm (> 28°C)
August27.7°C28.8°C29.7°CTropical Warm (> 28°C)
SeptemberCurrent28°C29.2°C29.9°CTropical Warm (> 28°C)
October27.5°C29.1°C30.7°CTropical Warm (> 28°C)
November27.4°C28.4°C29.7°CTropical Warm (> 28°C)
December26.5°C27.4°C28.7°CWarm & Ideal (24°C – 28°C)

Swimming FAQs for Blue Cobblestone Beach

Is the sea warm enough to swim in Blue Cobblestone Beach today?

Typical sea surface temperature in Blue Cobblestone Beach this time of year is 29.2°C (84.6°F) — classified as Tropical Warm (> 28°C). Very warm bath-like water. Zero chill, exceptional for relaxation and snorkeling. Live readings load automatically.

What are the warmest months for swimming in Blue Cobblestone Beach?

The highest water temperatures in Blue Cobblestone Beach typically occur duringJanuary, February, March, April, May, June, July, August, September, October, November, December, when monthly averages reach peak seasonal levels.

What is the typical water temperature in Blue Cobblestone Beach in September?

Historically in September, water temperatures in Blue Cobblestone Beach average around29.2°C (84.6°F), fluctuating between a recorded minimum of 28°C and a maximum of 29.9°C.

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Blue Cobblestone Beach Coastal Zone Map

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