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San Juan, PR Local Forecast Office

4NM NW San Juan PR

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:E wind around 13 kt. Scattered showers.   Seas around 4 ft.

      High: 82 °F

      E 13kt
      4ft

    • Tonight

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

      Low: 80 °F

      E 10kt
      4ft

    • Sunday

      Sunday:E wind 8 to 14 kt. Scattered showers, with thunderstorms also possible after 3pm.   Seas around 4 ft.

      High: 82 °F

      E 14kt
      4ft

    • Sunday Night

      Sunday Night:E wind 8 to 10 kt. Showers likely, mainly before 3am.   Seas around 4 ft.

      Low: 80 °F

      E 10kt
      4ft

    • Monday

      Monday:E wind 9 to 14 kt. Scattered showers, with thunderstorms also possible after noon.   Seas around 4 ft.

      High: 82 °F

      E 14kt
      4ft

    • Monday Night

      Monday Night:E wind 6 to 9 kt. Scattered showers.   Seas 3 to 4 ft.

      Low: 80 °F

      E 9kt
      3-4ft

    • Tuesday

      Tuesday:ENE wind 5 to 12 kt. Scattered showers before noon.   Seas around 3 ft.

      High: 82 °F

      ENE 12kt
      3ft

    • Tuesday Night

      Tuesday Night:E wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 2 to 3 ft.

      Low: 80 °F

      E 6kt⇓
      2-3ft

    • Wednesday

      Wednesday:ENE wind 6 to 9 kt. Scattered showers.   Seas around 2 ft.

      High: 82 °F

      ENE 9kt
      2ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 4:05 pm EDT Apr 18, 2026
Forecast Valid: 4pm EDT Apr 18, 2026-6pm EDT Apr 25, 2026

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Detailed Forecast


This Afternoon
E wind around 13 kt. Scattered showers. Seas around 4 ft.
Tonight
E wind 8 to 10 kt. Showers likely and possibly a thunderstorm before midnight, then scattered showers and thunderstorms between midnight and 3am, then scattered showers after 3am. Seas around 4 ft.
Sunday
E wind 8 to 14 kt. Scattered showers, with thunderstorms also possible after 3pm. Seas around 4 ft.
Sunday Night
E wind 8 to 10 kt. Showers likely, mainly before 3am. Seas around 4 ft.
Monday
E wind 9 to 14 kt. Scattered showers, with thunderstorms also possible after noon. Seas around 4 ft.
Monday Night
E wind 6 to 9 kt. Scattered showers. Seas 3 to 4 ft.
Tuesday
ENE wind 5 to 12 kt. Scattered showers before noon. Seas around 3 ft.
Tuesday Night
E wind around 6 kt becoming variable and less than 5 kt in the evening. Partly cloudy. Seas 2 to 3 ft.
Wednesday
ENE wind 6 to 9 kt. Scattered showers. Seas around 2 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: 4:05 pm EDT Apr 18, 2026
Forecast Valid: 4pm EDT Apr 18, 2026-6pm EDT Apr 25, 2026
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