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San Juan, PR Local Forecast Office

4NM NW San Juan PR

Marine Point Forecast

[NOTICE]
    • Today

      Today:E wind 7 to 15 kt. Scattered showers, with thunderstorms also possible after 3pm.   Seas around 4 ft.

      High: 82 °F

      E 15kt
      4ft

    • Tonight

      Tonight: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 8 to 14 kt. Scattered showers, mainly before 3pm.   Seas around 4 ft.

      High: 82 °F

      E 14kt
      4ft

    • Monday Night

      Monday Night:ESE wind 6 to 9 kt. Isolated showers.   Seas 3 to 4 ft.

      Low: 80 °F

      ESE 9kt
      3-4ft

    • Tuesday

      Tuesday:ENE wind 5 to 11 kt. Scattered showers, mainly before noon.   Seas around 3 ft.

      High: 82 °F

      ENE 11kt
      3ft

    • Tuesday Night

      Tuesday Night:ENE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Isolated showers.   Seas 2 to 3 ft.

      Low: 80 °F

      ENE 7kt⇓
      2-3ft

    • Wednesday

      Wednesday:Variable winds less than 5 kt becoming NE 5 to 10 kt in the morning. Scattered showers.   Seas around 2 ft.

      High: 82 °F

      ⇑NE 10kt
      2ft

    • Wednesday Night

      Wednesday Night:E wind around 7 kt. Partly cloudy. Seas 3 to 4 ft.

      Low: 80 °F

      E 7kt
      3-4ft

    • Thursday

      Thursday:ENE wind 7 to 9 kt. Scattered showers.   Seas around 5 ft.

      High: 82 °F

      ENE 9kt
      5ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 3:56 am EDT Apr 19, 2026
Forecast Valid: 6am EDT Apr 19, 2026-6pm EDT Apr 25, 2026

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Detailed Forecast


Today
E wind 7 to 15 kt. Scattered showers, with thunderstorms also possible after 3pm. Seas around 4 ft.
Tonight
E wind 8 to 10 kt. Showers likely, mainly before 3am. Seas around 4 ft.
Monday
E wind 8 to 14 kt. Scattered showers, mainly before 3pm. Seas around 4 ft.
Monday Night
ESE wind 6 to 9 kt. Isolated showers. Seas 3 to 4 ft.
Tuesday
ENE wind 5 to 11 kt. Scattered showers, mainly before noon. Seas around 3 ft.
Tuesday Night
ENE wind 5 to 7 kt becoming variable and less than 5 kt after midnight. Isolated showers. Seas 2 to 3 ft.
Wednesday
Variable winds less than 5 kt becoming NE 5 to 10 kt in the morning. Scattered showers. Seas around 2 ft.
Wednesday Night
E wind around 7 kt. Partly cloudy. Seas 3 to 4 ft.
Thursday
ENE wind 7 to 9 kt. Scattered showers. Seas around 5 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: 3:56 am EDT Apr 19, 2026
Forecast Valid: 6am EDT Apr 19, 2026-6pm EDT Apr 25, 2026
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