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Miami - South Florida Local Forecast Office

Key Biscayne FL

Marine Point Forecast

[NOTICE]

This Afternoon
High: 88 °F
Light Wind
Tonight
Low: 79 °F
S 6kt
Monday
High: 86 °F
W 6kt
Monday Night
Low: 78 °F
W 7kt
Tuesday
High: 84 °F
S 10kt
Tuesday Night
Low: 80 °F
SE 11kt
Wednesday
High: 86 °F
SSE 13kt
Wednesday Night
Low: 83 °F
ESE 12kt
Thursday
High: 87 °F
SE 13kt

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 1:32 pm EDT Jul 13, 2025
Forecast Valid: 3pm EDT Jul 13, 2025-6pm EDT Jul 19, 2025

View Nearby Observations

Detailed Forecast

This Afternoon

Variable winds 5 kt or less. Showers and thunderstorms likely. Bay waters smooth.

Tonight

S wind around 6 kt becoming NW after midnight. Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then a chance of showers and thunderstorms after 5am. Bay waters smooth.

Monday

W wind around 6 kt becoming S in the afternoon. Showers and thunderstorms, mainly after 11am. Some of the storms could produce heavy rainfall. Bay waters smooth.

Monday Night

W wind around 7 kt becoming SSW after midnight. Showers and possibly a thunderstorm before 7pm, then showers and thunderstorms likely between 7pm and 11pm, then showers likely and possibly a thunderstorm after 11pm. Some of the storms could produce heavy rainfall. Bay waters smooth.

Tuesday

S wind 8 to 10 kt. Showers and possibly a thunderstorm before 2pm, then showers and thunderstorms between 2pm and 5pm, then showers and possibly a thunderstorm after 5pm. Bay waters a light chop.

Tuesday Night

SE wind 9 to 11 kt. Showers and thunderstorms likely, mainly before 8pm, then showers likely and possibly a thunderstorm after 2am. Bay waters a light chop.

Wednesday

SSE wind 11 to 13 kt. Showers and thunderstorms likely. Bay waters a moderate chop becoming a light chop.

Wednesday Night

ESE wind 9 to 12 kt. A chance of showers and thunderstorms. Bay waters a light chop.

Thursday

SE wind 11 to 13 kt. A chance of showers and thunderstorms. Bay waters a moderate chop becoming a light chop.

Winds and waves higher in and near tstms.

*Notices:

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.
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.