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San Juan, PR Local Forecast Office

4NM NW San Juan PR

Marine Point Forecast

[NOTICE]
    • Today

      Today:Variable winds less than 5 kt becoming ESE 5 to 7 kt in the morning. Scattered showers, then showers likely and possibly a thunderstorm after noon.   Seas around 4 ft.

      High: 82 °F

      ⇑ESE 7kt
      4ft

    • Tonight

      Tonight:Variable winds less than 5 kt becoming ESE around 6 kt in the evening. Scattered showers, mainly after midnight.   Seas around 4 ft.

      Low: 80 °F

      ⇑ESE 6kt
      4ft

    • Thursday

      Thursday:E wind 7 to 14 kt, with gusts as high as 20 kt. Scattered showers, then showers and possibly a thunderstorm after noon.   Seas around 4 ft.

      High: 82 °F

      E 14kt
      4ft

    • Thursday Night

      Thursday Night:E wind 8 to 10 kt. Showers likely and possibly a thunderstorm before midnight, then isolated showers between midnight and 3am, then showers likely and possibly a thunderstorm after 3am.   Seas around 4 ft.

      Low: 80 °F

      E 10kt
      4ft

    • Friday

      Friday:E wind around 9 kt. Showers likely, with thunderstorms also possible after noon.   Seas around 3 ft.

      High: 82 °F

      E 9kt
      3ft

    • Friday Night

      Friday Night:E wind around 6 kt. Showers likely, mainly before midnight.   Seas around 3 ft.

      Low: 80 °F

      E 6kt
      3ft

    • Saturday

      Saturday:E wind 6 to 11 kt. Showers likely, mainly after noon.   Seas around 3 ft.

      High: 82 °F

      E 11kt
      3ft

    • Saturday Night

      Saturday Night:E wind around 9 kt. Showers likely.   Seas around 3 ft.

      Low: 80 °F

      E 9kt
      3ft

    • Sunday

      Sunday:E wind 8 to 10 kt. Showers likely.   Seas 3 to 4 ft.

      High: 82 °F

      E 10kt
      3-4ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 7:14 am EDT Apr 15, 2026
Forecast Valid: 8am EDT Apr 15, 2026-6pm EDT Apr 21, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT SHOULD EXERCISE CAUTION...

Today
Variable winds less than 5 kt becoming ESE 5 to 7 kt in the morning. Scattered showers, then showers likely and possibly a thunderstorm after noon. Seas around 4 ft.
Tonight
Variable winds less than 5 kt becoming ESE around 6 kt in the evening. Scattered showers, mainly after midnight. Seas around 4 ft.
Thursday
E wind 7 to 14 kt, with gusts as high as 20 kt. Scattered showers, then showers and possibly a thunderstorm after noon. Seas around 4 ft.
Thursday Night
E wind 8 to 10 kt. Showers likely and possibly a thunderstorm before midnight, then isolated showers between midnight and 3am, then showers likely and possibly a thunderstorm after 3am. Seas around 4 ft.
Friday
E wind around 9 kt. Showers likely, with thunderstorms also possible after noon. Seas around 3 ft.
Friday Night
E wind around 6 kt. Showers likely, mainly before midnight. Seas around 3 ft.
Saturday
E wind 6 to 11 kt. Showers likely, mainly after noon. Seas around 3 ft.
Saturday Night
E wind around 9 kt. Showers likely. Seas around 3 ft.
Sunday
E wind 8 to 10 kt. Showers likely. Seas 3 to 4 ft.

Winds and seas higher in and near thunderstorms.

*Notices:

  1. This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
  2. The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.
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ABOUT THIS FORECAST

Point Forecast: 18.46°N 66.13°W
Last Update: 7:14 am EDT Apr 15, 2026
Forecast Valid: 8am EDT Apr 15, 2026-6pm EDT Apr 21, 2026
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