Weather forecast for 10 daysSummerland Key, FL

Weather forecast for the weekend

Sunday Oct 18, 2026

  • 84°F
  • 77°F
PM Thunderstorms
PM Thunderstorms
  • Precip. probability: 43%
  • Precipitation: 0.12"
  • Wind: 20mphNE 46°
  • Humidity: 80%
  • UV index: 6
  • Sunrise: 7:25 am EDT
  • Sunset: 6:56 pm EDT
  • ▼
Tomorrow, thunder and lightning are forecasted to move in during the afternoon.
Minimal precipitation is expected. Temperature shifts will be minor, from a high of a moderately hot 84.2°F to a low of a warm 77°F.
The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is appraised at a sizzling 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.
Tomorrow, the anticipated maximum temperature should be consistent with October's typical high of 82°F.
Sunrise will be at 7:25 am and sunset at 6:56 pm; tomorrow's daylight will last for 11h and 31min.

10-day overview

Daily temperatures

Warmest day: Monday 86°C.
Coldest day: Monday 26.10. 81°C.

Chance of precipitation

Highest chance: today 85%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • min.
  • 77°F
Thunderstorms
Thunderstorms
  • Precip. probability: 85%
  • Precipitation: 0.04"
  • Wind: 17mphNNE 27°
  • Humidity: 86%
  • UV index: 0
  • Sunrise: 7:24 am EDT
  • Sunset: 6:57 pm EDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 84°F
  • 77°F
PM Thunderstorms
PM Thunderstorms
  • Precip. probability: 43%
  • Precipitation: 0.12"
  • Wind: 20mphNE 46°
  • Humidity: 80%
  • UV index: 6
  • Sunrise: 7:25 am EDT
  • Sunset: 6:56 pm EDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 86°F
  • 77°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 21mphENE 57°
  • Humidity: 70%
  • UV index: 9
  • Sunrise: 7:25 am EDT
  • Sunset: 6:55 pm EDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 84°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 20mphNE 45°
  • Humidity: 70%
  • UV index: 9
  • Sunrise: 7:26 am EDT
  • Sunset: 6:54 pm EDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 82°F
  • 77°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 10%
  • Precipitation: 0"
  • Wind: 16mphNE 36°
  • Humidity: 65%
  • UV index: 9
  • Sunrise: 7:26 am EDT
  • Sunset: 6:53 pm EDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 82°F
  • 77°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 10%
  • Precipitation: 0"
  • Wind: 15mphNE 34°
  • Humidity: 64%
  • UV index: 8
  • Sunrise: 7:27 am EDT
  • Sunset: 6:53 pm EDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 82°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 18%
  • Precipitation: 0"
  • Wind: 14mphNE 45°
  • Humidity: 66%
  • UV index: 8
  • Sunrise: 7:27 am EDT
  • Sunset: 6:52 pm EDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 82°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 21%
  • Precipitation: 0"
  • Wind: 17mphNE 38°
  • Humidity: 68%
  • UV index: 8
  • Sunrise: 7:28 am EDT
  • Sunset: 6:51 pm EDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 82°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 21%
  • Precipitation: 0"
  • Wind: 19mphNNE 28°
  • Humidity: 72%
  • UV index: 8
  • Sunrise: 7:28 am EDT
  • Sunset: 6:50 pm EDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 81°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 17mphNNE 20°
  • Humidity: 70%
  • UV index: 8
  • Sunrise: 7:29 am EDT
  • Sunset: 6:49 pm EDT
  • ▼
During the ten-day period, primarily dull and occasionally turbulent and clear weather is expected.
Rainfall is expected on Saturday and Sunday.
The high temperatures are expected to remain largely stable during the next few days. Highs will range from 80.6°F to 86°F, while the lowest nighttime temperatures will be also relatively consistent, as the lowest temperatures will remain in the range of 75.2°F to 77°F.
Monday will be the hottest day, with a maximum temperature of 86°F; the lowest daytime temperature of the period will be reached on next Monday, peaking at 80.6°F.
Including the humidity's impact, the maximum feel-like temperature may increase and range between 84.2°F and a fiery hot 95°F.
Updated: Oct 17, 2026 @ 23:21:19 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Tomorrow, expect thunderstorms and downpours in the afternoon.

Tomorrow, there is a low probability of minimal rainfall in Summerland Key.

Tomorrow, the maximum temperature will be 84.2°F, while the minimum temperature will be 77°F. The maximum heat index, which factors the actual air temperature with the relative humidity, is estimated at 95°F.
Tomorrow, the highest temperature will be in line with the average maximum temperature in October. Tomorrow, the lowest temperature will be also in line with the average low temperature.

On Sunday, in Summerland Key, sunrise will be at 7:25 am and sunset at 6:56 pm (EDT).

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