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San Juan, PR Local Forecast Office

3NM NW San Juan PR

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:E wind around 14 kt. Showers and possibly a thunderstorm.   Seas around 3 ft.

      High: 86 °F

      E 14kt
      3ft

    • Tonight

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

      Low: 82 °F

      ESE 10kt
      3ft

    • Thursday

      Thursday:E wind 9 to 15 kt, with gusts as high as 21 kt. Showers and possibly a thunderstorm.   Seas around 3 ft.

      High: 84 °F

      E 15kt
      3ft

    • Thursday Night

      Thursday Night:ESE wind 7 to 9 kt. Scattered showers, then showers likely and possibly a thunderstorm after midnight.   Seas around 3 ft.

      Low: 82 °F

      ESE 9kt
      3ft

    • Friday

      Friday:E wind 6 to 14 kt. Showers likely and possibly a thunderstorm.   Seas around 3 ft.

      High: 85 °F

      E 14kt
      3ft

    • Friday Night

      Friday Night:E wind 5 to 8 kt. Showers likely and possibly a thunderstorm before midnight, then scattered showers and thunderstorms after midnight.   Seas 2 to 3 ft.

      Low: 82 °F

      E 8kt
      2-3ft

    • Saturday

      Saturday:E wind 6 to 13 kt. Scattered showers after noon.   Seas around 2 ft.

      High: 85 °F

      E 13kt
      2ft

    • Saturday Night

      Saturday Night:E wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Scattered showers.   Seas around 2 ft.

      Low: 82 °F

      E 8kt⇓
      2ft

    • Sunday

      Sunday:SE wind 6 to 10 kt becoming E in the afternoon. Scattered showers.   Seas around 2 ft.

      High: 85 °F

      E 10kt
      2ft


High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:06 pm EDT Sep 16, 2026
Forecast Valid: 4pm EDT Sep 16, 2026-6pm EDT Sep 23, 2026

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Detailed Forecast

...SMALL CRAFT SHOULD EXERCISE CAUTION...

This Afternoon
E wind around 14 kt. Showers and possibly a thunderstorm. Seas around 3 ft.
Tonight
ESE wind 8 to 10 kt. Showers likely and possibly a thunderstorm before midnight, then scattered showers and thunderstorms between midnight and 3am, then showers likely and possibly a thunderstorm after 3am. Seas around 3 ft.
Thursday
E wind 9 to 15 kt, with gusts as high as 21 kt. Showers and possibly a thunderstorm. Seas around 3 ft.
Thursday Night
ESE wind 7 to 9 kt. Scattered showers, then showers likely and possibly a thunderstorm after midnight. Seas around 3 ft.
Friday
E wind 6 to 14 kt. Showers likely and possibly a thunderstorm. Seas around 3 ft.
Friday Night
E wind 5 to 8 kt. Showers likely and possibly a thunderstorm before midnight, then scattered showers and thunderstorms after midnight. Seas 2 to 3 ft.
Saturday
E wind 6 to 13 kt. Scattered showers after noon. Seas around 2 ft.
Saturday Night
E wind 5 to 8 kt becoming variable and less than 5 kt after midnight. Scattered showers. Seas around 2 ft.
Sunday
SE wind 6 to 10 kt becoming E in the afternoon. 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: 18.45°N 66.1°W
Last Update: 2:06 pm EDT Sep 16, 2026
Forecast Valid: 4pm EDT Sep 16, 2026-6pm EDT Sep 23, 2026
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