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Key Biscayne, FL Marine Weather Forecast

This Afternoon - 80°F
Dec 21, 2025
13 mph NE
Mostly Sunny
Mostly sunny, with a high near 80. Northeast wind around 13 mph.
Tonight - 74°F
Dec 21, 2025
13 to 21 mph NE
Partly Cloudy
Partly cloudy, with a low around 74. Northeast wind 13 to 21 mph.
Monday - 79°F
Dec 22, 2025
21 to 26 mph NE
Mostly Sunny
Mostly sunny, with a high near 79. Northeast wind 21 to 26 mph, with gusts as high as 30 mph.
Monday Night - 74°F
Dec 22, 2025
26 to 30 mph E
Partly Cloudy
Partly cloudy, with a low around 74. East wind 26 to 30 mph, with gusts as high as 33 mph.
Tuesday - 78°F
Dec 23, 2025
21 to 25 mph E
Mostly Sunny
Mostly sunny, with a high near 78. East wind 21 to 25 mph.
Tuesday Night - 73°F
Dec 23, 2025
16 to 21 mph NE
Mostly Clear
Mostly clear, with a low around 73. Northeast wind 16 to 21 mph.
Wednesday - 78°F
Dec 24, 2025
18 mph NE
Mostly Sunny
Mostly sunny, with a high near 78. Northeast wind around 18 mph.
Wednesday Night - 72°F
Dec 24, 2025
14 to 20 mph NE
Partly Cloudy
Partly cloudy, with a low around 72. Northeast wind 14 to 20 mph.
Christmas Day - 78°F
Dec 25, 2025
14 mph NE
Mostly Sunny
Mostly sunny, with a high near 78. Northeast wind around 14 mph.
Thursday Night - 71°F
Dec 25, 2025
7 to 12 mph NE
Partly Cloudy
Partly cloudy, with a low around 71.
Friday - 78°F
Dec 26, 2025
8 mph NE
Mostly Sunny
Mostly sunny, with a high near 78.
Friday Night - 71°F
Dec 26, 2025
5 to 8 mph E
Mostly Clear
Mostly clear, with a low around 71.
Saturday - 78°F
Dec 27, 2025
7 mph E
Mostly Sunny
Mostly sunny, with a high near 78.
Saturday Night - 71°F
Dec 27, 2025
8 mph E
Partly Cloudy
Partly cloudy, with a low around 71.

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