Weather forecast for 10 daysBay Harbor Islands, FL

Weather forecast for the weekend

Sunday Oct 18, 2026

  • 81°F
  • 77°F
Heavy Thunderstorms / Wind
Heavy Thunderstorms / Wind
  • Precip. probability: 100%
  • Precipitation: 1.18"
  • Wind: 22mphNE 39°
  • Humidity: 80%
  • UV index: 4
  • Sunrise: 7:21 am EDT
  • Sunset: 6:50 pm EDT
  • ▼
Today, on Sunday, October 18, powerful thunderstorms will move through, producing high wind gusts and heavy rain.
Elevated precipitation of 1.18" is expected. A subtle difference will be noticeable between the daytime peak temperature of a warm 80.6°F and the nighttime low of a moderately hot 77°F.
The maximum heat index, which indicates how humid air affects the felt temperature, is calculated to be a tropical 86°F. Note that heat index values are valued for light wind and location in the shade.
The forecasted high temperature will align with October's average of 83.1°F.
Sunrise will be at 7:21 am and sunset at 6:50 pm; the daylight will last for 11h and 29min.

10-day overview

Daily temperatures

Warmest day: tomorrow 84°C.
Minimum temperature: 81°C.

Chance of precipitation

Highest chance: today 100%.

Long-term weather forecast

  • Sunday
  • Oct 18, 2026
  • 81°F
  • 77°F
Heavy Thunderstorms / Wind
Heavy Thunderstorms / Wind
  • Precip. probability: 100%
  • Precipitation: 1.18"
  • Wind: 22mphNE 39°
  • Humidity: 80%
  • UV index: 4
  • Sunrise: 7:21 am EDT
  • Sunset: 6:50 pm EDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 84°F
  • 75°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 17%
  • Precipitation: 1.69"
  • Wind: 19mphNE 50°
  • Humidity: 65%
  • UV index: 8
  • Sunrise: 7:21 am EDT
  • Sunset: 6:49 pm EDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 82°F
  • 72°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 16mphNE 38°
  • Humidity: 65%
  • UV index: 8
  • Sunrise: 7:22 am EDT
  • Sunset: 6:48 pm EDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 82°F
  • 72°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 16%
  • Precipitation: 0"
  • Wind: 14mphNNE 29°
  • Humidity: 63%
  • UV index: 8
  • Sunrise: 7:22 am EDT
  • Sunset: 6:47 pm EDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 82°F
  • 72°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 12mphNNE 29°
  • Humidity: 64%
  • UV index: 8
  • Sunrise: 7:23 am EDT
  • Sunset: 6:46 pm EDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 82°F
  • 73°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 14mphNE 34°
  • Humidity: 62%
  • UV index: 8
  • Sunrise: 7:23 am EDT
  • Sunset: 6:45 pm EDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 81°F
  • 73°F
Thunderstorms
Thunderstorms
  • Precip. probability: 63%
  • Precipitation: 0.08"
  • Wind: 18mphNE 38°
  • Humidity: 68%
  • UV index: 8
  • Sunrise: 7:24 am EDT
  • Sunset: 6:45 pm EDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 81°F
  • 72°F
Rain
Rain
  • Precip. probability: 60%
  • Precipitation: 0.31"
  • Wind: 19mphNE 36°
  • Humidity: 72%
  • UV index: 8
  • Sunrise: 7:24 am EDT
  • Sunset: 6:44 pm EDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 81°F
  • 72°F
Showers
Showers
  • Precip. probability: 39%
  • Precipitation: 0.39"
  • Wind: 16mphNNE 31°
  • Humidity: 70%
  • UV index: 7
  • Sunrise: 7:25 am EDT
  • Sunset: 6:43 pm EDT
  • ▼
  • Tuesday
  • Oct 27, 2026
  • 82°F
  • 73°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 24%
  • Precipitation: 0.24"
  • Wind: 14mphNE 34°
  • Humidity: 64%
  • UV index: 8
  • Sunrise: 7:26 am EDT
  • Sunset: 6:42 pm EDT
  • ▼
The weather will be unstable for the next ten days, and a mix of dull, clear, thunderstorm-prone and showery weather is forecasted.
Rain is expected on Sunday, Monday, Saturday through next Tuesday.
Highs will stay within a very narrow margin over the next several days. Maximum temperatures will fall between 80.6°F and 84.2°F, while the lowest nighttime temperatures will be also relatively consistent, as the lowest temperatures will remain in the range of 71.6°F to 77°F.
Monday will be the hottest day, with a maximum temperature of 84.2°F; with a maximum temperature of 80.6°F, Sunday, Saturday through next Monday will be the coldest days in Bay Harbor Islands.
Updated: Oct 18, 2026 @ 06:15:59 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, torrential rain, thunderstorms, and strong winds are anticipated.

Increased precipitation of 1.18" is predicted with a high probability.

Today, the maximum temperature will be 80.6°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 86°F.
Today, the highest temperature will be in line with the average maximum temperature in October. Today, the lowest temperature will be also in line with the average low temperature.

On Sunday, in Bay Harbor Islands, sunrise will be at 7:21 am and sunset at 6:50 pm (EDT).

Today, the daylight will last for 11h and 29min.