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Grassy Key, FL - South Side, Hawk Channel Marine Weather Forecast

Station LONF1 - Long Key, FL

December 21, 2025 1:00 am EST
Location: 24.844N 80.864W
Wind Direction: E (80°)
Wind Speed: 2.9 knots
Wind Gust: 4.1 knots
Atmospheric Pressure: 30.09 in (1018.9 mb)
Pressure Tendency: -0.02 in (-0.6 mb)
Air Temperature: 75.6°F (24.2°C)
Dew Point: 72.9°F (22.7°C)


Overnight - 73°F
Dec 21, 2025
5 mph NE
Partly Cloudy
Partly cloudy, with a low around 73. Northeast wind around 5 mph.
Sunday - 79°F
Dec 21, 2025
5 to 10 mph NE
Mostly Sunny
Mostly sunny, with a high near 79. Northeast wind 5 to 10 mph.
Sunday Night - 72°F
Dec 21, 2025
10 to 15 mph NE
Mostly Cloudy
Mostly cloudy, with a low around 72. Northeast wind 10 to 15 mph.
Monday - 78°F
Dec 22, 2025
15 to 20 mph NE
Mostly Sunny
Mostly sunny, with a high near 78. Northeast wind 15 to 20 mph.
Monday Night - 72°F
Dec 22, 2025
20 mph E
Partly Cloudy
Partly cloudy, with a low around 72. East wind around 20 mph.
Tuesday - 79°F
Dec 23, 2025
15 to 20 mph E
Slight Chance Rain Showers
A slight chance of rain showers after 7am. Mostly sunny, with a high near 79.
Tuesday Night - 71°F
Dec 23, 2025
15 to 20 mph NE
Slight Chance Rain Showers then Mostly Clear
A slight chance of rain showers before 7pm. Mostly clear, with a low around 71.
Wednesday - 78°F
Dec 24, 2025
15 mph NE
Sunny
Sunny, with a high near 78.
Wednesday Night - 69°F
Dec 24, 2025
15 mph NE
Mostly Clear
Mostly clear, with a low around 69.
Christmas Day - 78°F
Dec 25, 2025
15 mph E
Mostly Sunny
Mostly sunny, with a high near 78.
Thursday Night - 70°F
Dec 25, 2025
10 to 15 mph NE
Slight Chance Rain Showers
A slight chance of rain showers after 7pm. Mostly clear, with a low around 70.
Friday - 77°F
Dec 26, 2025
10 mph E
Slight Chance Rain Showers
A slight chance of rain showers. Sunny, with a high near 77.
Friday Night - 70°F
Dec 26, 2025
5 to 10 mph E
Slight Chance Rain Showers then Mostly Clear
A slight chance of rain showers before 7pm. Mostly clear, with a low around 70.
Saturday - 77°F
Dec 27, 2025
10 mph NE
Mostly Sunny
Mostly sunny, with a high near 77.

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