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Santa Isabel, PR Marine Weather Forecast

Station 42085 - Southeast of Ponce, PR

August 18, 2026 7:30 am ADT
Location: 17.87N 66.537W
Wind Direction: NE (40°)
Wind Speed: 5.8 knots
Wind Gust: 9.7 knots
Atmospheric Pressure: 29.97 in (1014.9 mb)
Air Temperature: 82.9°F (28.3°C)


Overnight - 78°F
Aug 18, 2026
8 mph NE
Isolated Rain Showers
Isolated rain showers before 3am. Mostly clear, with a low around 78. Northeast wind around 8 mph.
Tuesday - 90°F
Aug 18, 2026
7 to 18 mph E
Sunny then Isolated Rain Showers
Isolated rain showers after noon. Sunny. High near 90, with temperatures falling to around 86 in the afternoon. Heat index values as high as 102. East wind 7 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Tuesday Night - 78°F
Aug 18, 2026
6 to 14 mph ENE
Mostly Clear then Isolated Rain Showers
Isolated rain showers after midnight. Mostly clear, with a low around 78. East northeast wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Wednesday - 88°F
Aug 19, 2026
7 to 12 mph ESE
Scattered Rain Showers
Scattered rain showers before noon, then scattered showers and thunderstorms. Mostly sunny, with a high near 88. East southeast wind 7 to 12 mph. Chance of precipitation is 40%.
Wednesday Night - 79°F
Aug 19, 2026
9 mph E
Isolated Rain Showers
Isolated rain showers. Partly cloudy, with a low around 79. East wind around 9 mph.
Thursday - 89°F
Aug 20, 2026
9 to 16 mph E
Isolated Rain Showers then Sunny
Isolated rain showers before noon. Sunny, with a high near 89. East wind 9 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Thursday Night - 78°F
Aug 20, 2026
9 to 14 mph E
Clear
Clear, with a low around 78. East wind 9 to 14 mph, with gusts as high as 23 mph.
Friday - 90°F
Aug 21, 2026
10 to 20 mph E
Sunny then Isolated Rain Showers
Isolated rain showers after noon. Sunny, with a high near 90. East wind 10 to 20 mph, with gusts as high as 31 mph.
Friday Night - 79°F
Aug 21, 2026
8 to 14 mph ENE
Mostly Clear
Mostly clear, with a low around 79. East northeast wind 8 to 14 mph, with gusts as high as 23 mph.
Saturday - 89°F
Aug 22, 2026
10 to 18 mph E
Sunny
Sunny, with a high near 89.
Saturday Night - 79°F
Aug 22, 2026
8 to 15 mph E
Mostly Clear
Mostly clear, with a low around 79.
Sunday - 90°F
Aug 23, 2026
10 to 16 mph E
Sunny then Isolated Rain Showers
Isolated rain showers after noon. Sunny, with a high near 90.
Sunday Night - 79°F
Aug 23, 2026
9 to 13 mph E
Isolated Rain Showers
Isolated rain showers. Partly cloudy, with a low around 79.
Monday - 90°F
Aug 24, 2026
9 to 21 mph E
Isolated Rain Showers
Isolated rain showers. Mostly sunny, with a high near 90.

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