Weather forecast for tomorrowBig Coppitt Key, FL

Weather forecast for tomorrow

Monday Oct 19, 2026

  • 86°F
  • 77°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 21%
  • Precipitation: 0"
  • Wind: 23mphENE 59°
  • Humidity: 68%
  • UV index: 7
  • Sunrise: 7:26 am EDT
  • Sunset: 6:56 pm EDT
  • ▼
Tomorrow, on Monday, cool winds will move through a partly cloudy sky.
Rainfall is not anticipated. A slight fluctuation in temperature is forecasted, achieving a maximum of a blazing 86°F and dipping to a minimum of a moderately hot 77°F.
The maximum heat index, which represents the influence of relative humidity on air temperature, is computed to be a sweltering 95°F. Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Forecasts suggest the maximum temperature will be moderately higher than October's average of 82°F.
Sunrise will be at 7:26 am and sunset at 6:56 pm; tomorrow's daylight will last for 11h and 30min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 91°C.
Coldest hour: 6 am 84°C.

Chance of precipitation

Highest chance: 6 am 22%.

Hourly weather forecast

  • 12 am
  • 81°F
  • Feels like:
    86°F
Mostly Cloudy / Wind
Mostly Cloudy / Wind
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 22mphNE 52°
  • Humidity: 78%
  • Pressure: 30"Hg
  • Visibility: 8mi
  • UV index: 0
  • ▼
  • 2 am
  • 81°F
  • Feels like:
    86°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 18%
  • Precipitation: 0"
  • Wind: 23mphNE 49°
  • Humidity: 79%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 4 am
  • 79°F
  • Feels like:
    84°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 21%
  • Precipitation: 0"
  • Wind: 21mphNE 49°
  • Humidity: 79%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 79°F
  • Feels like:
    84°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 22%
  • Precipitation: 0"
  • Wind: 19mphNE 49°
  • Humidity: 81%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:26 am
  • 8 am
  • 79°F
  • Feels like:
    84°F
Mostly Cloudy / Wind
Mostly Cloudy / Wind
  • Precip. probability: 17%
  • Precipitation: 0"
  • Wind: 21mphNE 52°
  • Humidity: 78%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 am
  • 82°F
  • Feels like:
    88°F
Mostly Cloudy / Wind
Mostly Cloudy / Wind
  • Precip. probability: 18%
  • Precipitation: 0"
  • Wind: 23mphNE 54°
  • Humidity: 70%
  • Pressure: 30"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 12 pm
  • 84°F
  • Feels like:
    90°F
Mostly Cloudy / Wind
Mostly Cloudy / Wind
  • Precip. probability: 11%
  • Precipitation: 0"
  • Wind: 22mphENE 60°
  • Humidity: 67%
  • Pressure: 30"Hg
  • Visibility: 10mi
  • UV index: 6
  • ▼
  • 2 pm
  • 86°F
  • Feels like:
    91°F
Cloudy / Wind
Cloudy / Wind
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 22mphENE 67°
  • Humidity: 65%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 5
  • ▼
  • 4 pm
  • 86°F
  • Feels like:
    91°F
Mostly Cloudy / Wind
Mostly Cloudy / Wind
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 22mphENE 66°
  • Humidity: 62%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 6 pm
  • 84°F
  • Feels like:
    90°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 21mphENE 61°
  • Humidity: 64%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:56 pm
  • 8 pm
  • 82°F
  • Feels like:
    88°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 21mphENE 62°
  • Humidity: 67%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 81°F
  • Feels like:
    86°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 22mphNE 54°
  • Humidity: 71%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Tomorrow, on Monday, a combination of primarily gloomy and occasionally storm-filled and wet weather is expected.
The temperature will be between a minimum of 78.8°F and a maximum of 86°F. The hottest part of the day will be from 2 pm to 4 pm.
The forecasted high will be moderately higher than the typical October maximum of 82°F. The expected low will be also in line with the average minimum in October, which is 79.7°F.
Updated: Oct 18, 2026 @ 16:34:19 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Monday, in Big Coppitt Key, windy and partly cloudy conditions will define the day.

No, it will not rain tomorrow.

Tomorrow, the maximum temperature will be 86°F, while the minimum temperature will be 77°F. The maximum heat index, which factors the actual air temperature with the relative humidity, is evaluated at 95°F.
The highest temperature will be a few degrees higher than the average maximum of 82°F in October. The lowest temperature will be in line with the average low of 79.7°F.

On Monday, in Big Coppitt Key, sunrise will be at 7:26 am and sunset at 6:56 pm (EDT).

In Big Coppitt Key, tomorrow, there will be 11h and 30min of daylight.