Big Coppitt Key, FL Weather Forecast

Local 7-day forecast

89°

Slight Chance Showers And Thunderstorms

Track current conditions, temperature changes, wind, and the full daily outlook for Big Coppitt Key, FL in one place.

Thursday, October 15, 2026

Wind: 10 mph E

This Afternoon

A slight chance of showers and thunderstorms. Sunny, with a high near 89. East wind around 10 mph. Chance of precipitation is 20%.

Local 7-day forecast

Local Weather Overview

This forecast page for Big Coppitt Key, FL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 15, 2026 2:54 PM EDT.

The active forecast window currently covers Oct 15 to Oct 21, 2026 for Big Coppitt Key, FL.

Page Snapshot

Page focus: city weather
Forecast window: Oct 15 to Oct 21, 2026
Latest sync: Oct 15, 2026 2:54 PM EDT
Forecast office: KEY
Source: NOAA / NWS

Next High

89°F

This Afternoon

Next Low

82°F

Tonight

Rain Outlook

Periods mentioning precipitation

Windiest

20 to 25 mph

Sunday Night

Daily Outlook

Today

Oct 15

Slight Chance Showers And Thunderstorms

89 °F

/ 82°F

Wind 10 mph

Fri

Oct 16

Chance Showers And Thunderstorms

90 °F

/ 79°F

Wind 5 to 10 mph

Sat

Oct 17

Showers And Thunderstorms Likely

87 °F

/ 78°F

Wind 5 to 10 mph

Sun

Oct 18

Showers And Thunderstorms

86 °F

/ 78°F

Wind 20 mph

Mon

Oct 19

Showers And Thunderstorms

85 °F

/ 78°F

Wind 20 to 25 mph

Tue

Oct 20

Showers And Thunderstorms Likely then Chance Showers And Thunderstorms

85 °F

/ 78°F

Wind 20 to 25 mph

Wed

Oct 21

Chance Showers And Thunderstorms

85 °F

/ 78°F

Wind 15 to 20 mph

This Week in Big Coppitt Key

Friday looks like the warmest upcoming period in Big Coppitt Key at 90 degrees F.

Saturday Night is the coolest period ahead with temperatures near 78 degrees F.

The strongest winds are forecast for Sunday Night at about 20 to 25 mph NE.

Precipitation is mentioned in 14 upcoming forecast periods.

Forecast Details

Last updated: Oct 15, 2026 2:54 PM EDT
Coverage: 7 days
Time zone: America/New_York
Forecast office: KEY
Radar station: KBYX

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Tonight

Oct 15

82°F

Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms

10 to 15 mph E

A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 82. East wind 10 to 15 mph. Chance of precipitation is 40%.

Friday

Oct 16

90°F

Chance Showers And Thunderstorms

5 to 10 mph E

A chance of showers and thunderstorms. Mostly sunny, with a high near 90. East wind 5 to 10 mph. Chance of precipitation is 50%.

Friday Night

Oct 16

79°F

Chance Showers And Thunderstorms

5 mph E

A chance of showers and thunderstorms. Mostly cloudy, with a low around 79. East wind around 5 mph. Chance of precipitation is 50%.

Saturday

Oct 17

87°F

Showers And Thunderstorms Likely

5 to 10 mph NE

Showers and thunderstorms likely. Partly sunny, with a high near 87. Northeast wind 5 to 10 mph. Chance of precipitation is 60%.

Saturday Night

Oct 17

78°F

Showers And Thunderstorms

10 to 20 mph NE

Showers and thunderstorms. Mostly cloudy, with a low around 78. Chance of precipitation is 80%.

Sunday

Oct 18

86°F

Showers And Thunderstorms

20 mph NE

Showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 90%.

Sunday Night

Oct 18

78°F

Showers And Thunderstorms

20 to 25 mph NE

Showers and thunderstorms. Mostly cloudy, with a low around 78. Chance of precipitation is 90%.

Monday

Oct 19

85°F

Showers And Thunderstorms

20 to 25 mph NE

Showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 80%.

Monday Night

Oct 19

78°F

Showers And Thunderstorms Likely

20 to 25 mph NE

Showers and thunderstorms likely. Mostly cloudy, with a low around 78. Chance of precipitation is 60%.

Tuesday

Oct 20

85°F

Showers And Thunderstorms Likely then Chance Showers And Thunderstorms

20 to 25 mph NE

Showers and thunderstorms likely before 8am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 60%.

Tuesday Night

Oct 20

78°F

Chance Showers And Thunderstorms

20 mph NE

A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 78. Chance of precipitation is 50%.

Wednesday

Oct 21

85°F

Chance Showers And Thunderstorms

15 to 20 mph NE

A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 40%.

Wednesday Night

Oct 21

78°F

Chance Showers And Thunderstorms

15 mph NE

A chance of rain showers before 8pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 78. Chance of precipitation is 40%.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
This Afternoon Oct 15	Slight Chance Showers And Thunderstorms	89°F	10 mph E	A slight chance of showers and thunderstorms. Sunny, with a high near 89. East wind around 10 mph. Chance of precipitati...
Tonight Oct 15	Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms	82°F	10 to 15 mph E	A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Partly cloudy, with...
Friday Oct 16	Chance Showers And Thunderstorms	90°F	5 to 10 mph E	A chance of showers and thunderstorms. Mostly sunny, with a high near 90. East wind 5 to 10 mph. Chance of precipitation...
Friday Night Oct 16	Chance Showers And Thunderstorms	79°F	5 mph E	A chance of showers and thunderstorms. Mostly cloudy, with a low around 79. East wind around 5 mph. Chance of precipitat...
Saturday Oct 17	Showers And Thunderstorms Likely	87°F	5 to 10 mph NE	Showers and thunderstorms likely. Partly sunny, with a high near 87. Northeast wind 5 to 10 mph. Chance of precipitation...
Saturday Night Oct 17	Showers And Thunderstorms	78°F	10 to 20 mph NE	Showers and thunderstorms. Mostly cloudy, with a low around 78. Chance of precipitation is 80%.
Sunday Oct 18	Showers And Thunderstorms	86°F	20 mph NE	Showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 90%.
Sunday Night Oct 18	Showers And Thunderstorms	78°F	20 to 25 mph NE	Showers and thunderstorms. Mostly cloudy, with a low around 78. Chance of precipitation is 90%.
Monday Oct 19	Showers And Thunderstorms	85°F	20 to 25 mph NE	Showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 80%.
Monday Night Oct 19	Showers And Thunderstorms Likely	78°F	20 to 25 mph NE	Showers and thunderstorms likely. Mostly cloudy, with a low around 78. Chance of precipitation is 60%.
Tuesday Oct 20	Showers And Thunderstorms Likely then Chance Showers And Thunderstorms	85°F	20 to 25 mph NE	Showers and thunderstorms likely before 8am, then a chance of showers and thunderstorms. Mostly sunny, with a high near...
Tuesday Night Oct 20	Chance Showers And Thunderstorms	78°F	20 mph NE	A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Partly cloudy, with a low...
Wednesday Oct 21	Chance Showers And Thunderstorms	85°F	15 to 20 mph NE	A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 40%.
Wednesday Night Oct 21	Chance Showers And Thunderstorms	78°F	15 mph NE	A chance of rain showers before 8pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 78. Ch...

Nearby Forecasts

Explore weather pages for nearby cities and major places around Big Coppitt Key.

Region Links

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Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.