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Miami - South Florida Local Forecast Office

Key Biscayne FL

Marine Point Forecast

[NOTICE]

Overnight
Low: 80 °F
ESE 6kt⇓
1ft
Saturday
High: 87 °F
Light Wind
1ft
Saturday Night
Low: 79 °F
Light Wind
1ft
Sunday
High: 87 °F
Light Wind
1ft
Sunday Night
Low: 79 °F
Light Wind
1ft
Monday
High: 87 °F
⇑S 9kt
1ft
Monday Night
Low: 81 °F
S 8kt
1ft
Tuesday
High: 88 °F
S 7kt
1ft
Tuesday Night
Low: 80 °F
SSE 6kt
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 4:06 pm EDT Sep 18, 2026
Forecast Valid: 11pm EDT Sep 18, 2026-6pm EDT Sep 25, 2026

View Nearby Observations

Detailed Forecast

Overnight

ESE wind around 6 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms, mainly between 2am and 4am. Seas around 1 ft. Dominant period 3 seconds. Intracoastal waters smooth.

Saturday

Variable winds 5 kt or less. Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. Seas around 1 ft. Dominant period 3 seconds. Intracoastal waters smooth.

Saturday Night

Variable winds 5 kt or less. Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm between 1am and 2am, then a chance of showers and thunderstorms after 2am. Seas around 1 ft. Dominant period 3 seconds. Intracoastal waters smooth.

Sunday

Variable winds 5 kt or less. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. Seas around 1 ft. Dominant period 3 seconds. Intracoastal waters smooth.

Sunday Night

Variable winds 5 kt or less. Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Seas around 1 ft. Intracoastal waters smooth.

Monday

Variable winds less than 5 kt becoming S 5 to 9 kt in the afternoon. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. Seas around 1 ft. Intracoastal waters smooth becoming a light chop.

Monday Night

S wind around 8 kt. Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Seas around 1 ft. Intracoastal waters smooth.

Tuesday

S wind 5 to 7 kt. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. Seas around 1 ft. Intracoastal waters smooth.

Tuesday Night

SSE wind around 6 kt. Showers and possibly a thunderstorm. Seas around 1 ft. Intracoastal waters smooth.

Winds and seas 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.