Arecibo
NDBC buoy 41121
Observed , 58 minutes ago
Elevated
Tonight
Light chop seas at 2 ft with 5 second dominant period from the ENE, easing. Water 86°F, air 78°F. Tonight: East Winds 10 To 15 Knots With Gusts Up To 20 Knots, Becoming Southeast 5 To 10 Knots Late This Evening And Overnight.
It tells you it is rough now. The app tells you before it gets rough, with alerts at the wind and wave limits you set.
Get Buoycast for iPhoneWaves
2ft
Period
5 s
Direction
73° ENE
Last 11 hours1.6 to 2.6 ft
Air temp
78°F
76 to 85°F today
Water temp
86°F
86 to 86°F today
Zone forecast
Tonight
East Winds 10 To 15 Knots With Gusts Up To 20 Knots, Becoming Southeast 5 To 10 Knots Late This Evening And Overnight. Seas Around 3 Feet. Wave Detail: East 3 Feet At 5 Seconds And North 2 Feet At 13 Seconds. Scattered Showers This Evening. Numerous Showers After Midnight, Then Scattered Showers Late.
Thursday
East Winds 5 To 10 Knots, Increasing To 10 To 15 Knots With Gusts Up To 20 Knots In The Afternoon. Seas Around 3 Feet. Wave Detail: East 3 Feet At 5 Seconds And North 2 Feet At 12 Seconds. Scattered Showers.
Thursday Night
Southeast Winds 5 To 10 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: East 3 Feet At 5 Seconds And Northeast 2 Feet At 12 Seconds.
Synopsis
A surface high pressure building from the north-central Atlantic will promote light to moderate east to southeast winds through the end of the week. A weak long-period northeasterly swell will reach the area late tonight, with seas building between 3 to 4 feet. Afternoon thunderstorms developing from the Atlantic and western coastal waters of Puerto Rico may produce locally strong gusts and frequent lightning through the early evening hours each day.
NWS zone Coastal Waters of Northern Puerto Rico out 10 NM
Last 24 hours
Every 3 hours, over the last 12 hours. Air 76 to 85°F over the same window.
Common questions
How often does buoy 41121 report?
temperature update about every 10 minutes. Wave height and period update about every 30 minutes.
Can I be notified when conditions change at buoy 41121?
Buoycast Pro lets you set your own limits on wind, waves or pressure and sends a threshold notification when this buoy crosses them.
Does this page show NOAA warnings for this area?
Watches, warnings, and advisories for Coastal Waters of Northern Puerto Rico out 10 NM appear alongside the conditions, here and in the app. Pro also pushes NOAA watches, warnings, and advisories when they are issued.
Can I see the forecast against what buoy 41121 measured?
This page shows measurements only. Buoycast Pro charts the NOAA forecast against them so you can see where the two diverge.
Can I keep buoy 41121 for next time?
Save it as a favorite and Buoycast opens on the buoys you run.
What this buoy measures
This buoy is not reporting wind or barometric pressure. Conditions above come from the sensors it does carry, and the forecast, tides and sun times on this page are regional rather than measured at the buoy.
Station 41121
18°29'24" N 66°42'04" W · owned and maintained by Caribbean Integrated Coastal Ocean Observing System (CarICoos)
Measured on the water by 1,000+ NOAA buoys. Observations from the National Data Buoy Center, forecasts and advisories from the National Weather Service. Not for navigation.