Weather forecast for tomorrowSunset Key, FL

Weather forecast for tomorrow

Sunday Oct 18, 2026

  • 84°F
  • 79°F
PM Thunderstorms / Wind
PM Thunderstorms / Wind
  • Precip. probability: 41%
  • Precipitation: 0.2"
  • Wind: 21mphNE 49°
  • Humidity: 80%
  • UV index: 6
  • Sunrise: 7:26 am EDT
  • Sunset: 6:58 pm EDT
  • ▼
Tomorrow, on Sunday, the weather will be windy and stormy in the afternoon, with thunderstorms likely.
The chance of rainfall is low, and light precipitation is expected. Minor temperature shifts are forecasted, peaking at a maximum of a warm 84.2°F and dropping to a minimum of a temperate 78.8°F.
The maximum heat index, which indicates how humid air affects the felt temperature, is estimated at a very hot 95°F. Note that heat index values are valued for light wind and location in the shade. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees.
Sunrise will be at 7:26 am and sunset at 6:58 pm; tomorrow's daylight will last for 11h and 31min.

Hourly overview

Hourly temperatures

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

Chance of precipitation

Highest chance: 12 am 68%.

Hourly weather forecast

  • 12 am
  • 79°F
  • Feels like:
    86°F
Thunderstorms
Thunderstorms
  • Precip. probability: 68%
  • Precipitation: 0.04"
  • Wind: 14mphNE 35°
  • Humidity: 87%
  • Pressure: 29.97"Hg
  • Visibility: 6mi
  • UV index: 0
  • ▼
  • 2 am
  • 81°F
  • Feels like:
    88°F
Cloudy
Cloudy
  • Precip. probability: 13%
  • Precipitation: 0"
  • Wind: 16mphNE 40°
  • Humidity: 88%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 4 am
  • 79°F
  • Feels like:
    86°F
Cloudy
Cloudy
  • Precip. probability: 13%
  • Precipitation: 0"
  • Wind: 17mphNE 40°
  • Humidity: 89%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 79°F
  • Feels like:
    84°F
Few Showers
Few Showers
  • Precip. probability: 31%
  • Precipitation: 0.04"
  • Wind: 18mphNE 40°
  • Humidity: 88%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:26 am
  • 8 am
  • 79°F
  • Feels like:
    86°F
Cloudy
Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 19mphNE 41°
  • Humidity: 87%
  • Pressure: 29.97"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
  • 10 am
  • 81°F
  • Feels like:
    88°F
Mostly Cloudy / Wind
Mostly Cloudy / Wind
  • Precip. probability: 20%
  • Precipitation: 0"
  • Wind: 21mphNE 46°
  • Humidity: 82%
  • Pressure: 30"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 12 pm
  • 82°F
  • Feels like:
    90°F
Cloudy / Wind
Cloudy / Wind
  • Precip. probability: 16%
  • Precipitation: 0"
  • Wind: 20mphNE 51°
  • Humidity: 79%
  • Pressure: 30"Hg
  • Visibility: 10mi
  • UV index: 5
  • ▼
  • 2 pm
  • 82°F
  • Feels like:
    91°F
Isolated Thunderstorms
Isolated Thunderstorms
  • Precip. probability: 31%
  • Precipitation: 0.04"
  • Wind: 19mphENE 57°
  • Humidity: 76%
  • Pressure: 29.97"Hg
  • Visibility: 9mi
  • UV index: 5
  • ▼
  • 4 pm
  • 84°F
  • Feels like:
    91°F
Isolated Thunderstorms
Isolated Thunderstorms
  • Precip. probability: 33%
  • Precipitation: 0.04"
  • Wind: 19mphNE 54°
  • Humidity: 76%
  • Pressure: 29.94"Hg
  • Visibility: 7mi
  • UV index: 2
  • ▼
  • 6 pm
  • 82°F
  • Feels like:
    90°F
Scattered Thunderstorms / Wind
Scattered Thunderstorms / Wind
  • Precip. probability: 42%
  • Precipitation: 0.08"
  • Wind: 20mphNE 50°
  • Humidity: 77%
  • Pressure: 29.94"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
Sunset: 6:58 pm
  • 8 pm
  • 81°F
  • Feels like:
    88°F
Cloudy / Wind
Cloudy / Wind
  • Precip. probability: 22%
  • Precipitation: 0"
  • Wind: 21mphNE 51°
  • Humidity: 81%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 81°F
  • Feels like:
    86°F
Mostly Cloudy / Wind
Mostly Cloudy / Wind
  • Precip. probability: 20%
  • Precipitation: 0"
  • Wind: 22mphNE 49°
  • Humidity: 81%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Tomorrow, on Sunday, a combination of cloud-filled, thunderstorm-prone and rain-soaked weather is predicted.
Rainfall is predicted at 12 am, 6 am, 7 am, and from 2 pm to 7 pm. With light precipitation of 0.08", most rainfall is expected at 6 pm.
The temperature difference will be unnoticeable, with the lowest temperature of 78.8°F and the highest temperature of 84.2°F. The feels-like temperature will be between a minimum of 84.2°F and a maximum of 91.4°F. The hottest part of the day is expected around 4 pm.
Updated: Oct 18, 2026 @ 02:07:18 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, expect thunderstorms and gusty winds in the afternoon.

With a probability of 41%, light precipitation of 0.2" is anticipated.

Tomorrow, the highest temperature will be 84.2°F, while the lowest temperature will be 78.8°F. The maximum heat index, which modifies the air temperature to account for humidity, is assessed at 95°F.

On Sunday, in Sunset Key, sunrise will be at 7:26 am and sunset at 6:58 pm (EDT).

Tomorrow, the daylight will last for 11h and 31min.