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San Marino Island, FL Marine Weather Forecast

Tonight - 73°F
Apr 20, 2026
22 to 25 mph NE
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before midnight, then a chance of showers and thunderstorms between midnight and 4am, then a slight chance of showers and thunderstorms between 4am and 5am. Mostly cloudy, with a low around 73. Northeast wind 22 to 25 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday - 77°F
Apr 21, 2026
22 to 26 mph NE
Mostly Sunny
Mostly sunny, with a high near 77. Northeast wind 22 to 26 mph, with gusts as high as 31 mph. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night - 72°F
Apr 21, 2026
20 to 24 mph NE
Partly Cloudy
Partly cloudy, with a low around 72. Northeast wind 20 to 24 mph, with gusts as high as 28 mph.
Wednesday - 76°F
Apr 22, 2026
16 to 20 mph E
Partly Sunny
Partly sunny, with a high near 76. East wind 16 to 20 mph.
Wednesday Night - 72°F
Apr 22, 2026
13 to 16 mph E
Mostly Cloudy
Mostly cloudy, with a low around 72. East wind 13 to 16 mph, with gusts as high as 21 mph.
Thursday - 77°F
Apr 23, 2026
14 mph E
Mostly Cloudy
Mostly cloudy, with a high near 77. East wind around 14 mph, with gusts as high as 20 mph.
Thursday Night - 72°F
Apr 23, 2026
14 mph E
Mostly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 2am. Mostly cloudy, with a low around 72. East wind around 14 mph. Chance of precipitation is 20%.
Friday - 77°F
Apr 24, 2026
12 mph SE
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
A slight chance of rain showers before 2pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 77. Southeast wind around 12 mph. Chance of precipitation is 20%.
Friday Night - 73°F
Apr 24, 2026
7 to 12 mph SE
Slight Chance Showers And Thunderstorms then Mostly Cloudy
A slight chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 73. Southeast wind 7 to 12 mph. Chance of precipitation is 20%.
Saturday - 80°F
Apr 25, 2026
7 to 10 mph E
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
Saturday Night - 74°F
Apr 25, 2026
5 to 9 mph SE
Slight Chance Showers And Thunderstorms then Partly Cloudy
A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 74. Chance of precipitation is 20%.
Sunday - 81°F
Apr 26, 2026
5 to 10 mph SE
Sunny
Sunny, with a high near 81.
Sunday Night - 75°F
Apr 26, 2026
6 to 10 mph SE
Mostly Clear
Mostly clear, with a low around 75.
Monday - 82°F
Apr 27, 2026
5 to 9 mph SE
Sunny
Sunny, with a high near 82.

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