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Miami - South Florida Local Forecast Office

5NM WNW Key Biscayne FL

Marine Point Forecast

[NOTICE]

This Afternoon
High: 90 °F
S 10kt
Tonight
Low: 83 °F
S 7kt
Friday
High: 89 °F
SSE 10kt
Friday Night
Low: 82 °F
S 7kt
Saturday
High: 90 °F
⇑SSE 9kt
Saturday Night
Low: 81 °F
SSE 7kt
Sunday
High: 89 °F
⇑SE 8kt
Sunday Night
Low: 81 °F
SSE 6kt⇓
Monday
High: 90 °F
⇑ESE 9kt

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 2:32 pm EDT Aug 20, 2026
Forecast Valid: 3pm EDT Aug 20, 2026-6pm EDT Aug 26, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

S wind around 10 kt. A chance of showers and thunderstorms. Bay waters a light chop.

Tonight

S wind 5 to 7 kt. A chance of showers and thunderstorms before 8pm. Bay waters smooth.

Friday

SSE wind 6 to 10 kt. A chance of showers and thunderstorms, mainly after 3pm. Bay waters smooth becoming a light chop.

Friday Night

S wind 5 to 7 kt. A chance of showers and thunderstorms before 8pm. Bay waters smooth.

Saturday

Variable winds less than 5 kt becoming SSE 5 to 9 kt in the afternoon. A chance of showers and thunderstorms, mainly after 2pm. Bay waters smooth becoming a light chop.

Saturday Night

SSE wind 5 to 7 kt. A chance of showers and thunderstorms before 8pm. Bay waters smooth.

Sunday

Variable winds less than 5 kt becoming SE 5 to 8 kt in the afternoon. A chance of showers and thunderstorms after 2pm. Bay waters smooth becoming a light chop.

Sunday Night

SSE wind around 6 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am. Bay waters smooth.

Monday

Variable winds less than 5 kt becoming ESE 5 to 9 kt in the afternoon. A slight chance of showers and thunderstorms. Bay waters smooth 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.