NOAA NDBC SJNP4
SAN JUAN water temperature
Latest water temperature and buoy observations for SAN JUAN from NDBC station 9755371 - San Juan, La Puntilla, San Juan Bay, PR (SJNP4).
See today's Boat or Nope call for SAN JUANLatest report
86.9°F
86.9°F is milder water. It is still a reason to wear a life jacket, not a reason to skip one.
- Water
- 86.9 °F
- Wind
- 11 kt (12.7 mph)
- Gust
- 13 kt
- Seas
- ft
- Observed
- Oct 22, 6:48 PM AST
Wind at 11 knots is Beaufort force 4, Moderate breeze. A 17-ft open boat feels this wind. Many 23-ft boats are still fine. A 40-ft boat usually has margin. Boat or Nope's default 23-ft profile uses a 15-knot wind limit, inside this band. Beaufort scale · Knots to mph
Source and freshness
Retrieved from the NOAA NDBC realtime 2 file. A fresh copy is reused for about 2 minutes, and a recent copy can stand in for up to 30 minutes if the feed blips. Retrieved Oct 22, 7:24 PM AST.
NDBC station SJNP4 · Realtime file
This buoy is also the observation station for Boca del Cibuco.
Check the boat day
Nearby water temperature stations
Water temperature questions
Where does the SAN JUAN water temperature come from?
Water temperature, wind, and seas on this page come from the NOAA NDBC realtime feed for station SJNP4 (9755371 - San Juan, La Puntilla, San Juan Bay, PR). That is the same buoy file the SAN JUAN harbor page already requests. This page does not add a separate CO-OPS water-temperature product.
How fresh is the buoy reading?
The page shows the observation time from the NDBC report and the time Boat or Nope retrieved the file. The realtime file is cached for about 2 minutes when fresh, and a recent copy can be reused for up to 30 minutes if NDBC is briefly unavailable.
Why might the beach feel different from this temperature?
A buoy can sit offshore of the harbor, and shallow water warms and cools faster than the sensor. The station name and distance, when Boat or Nope has one, say how far the reading is from the harbor.
What does a cold reading mean for boating?
Water under 60°F can cause cold shock if someone falls in. The note on this page is general context. It is not a life-jacket or wetsuit rule for your boat.