Weather forecast for 10 daysPort Saint John, FL

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 79°F
  • 70°F
Showers
Showers
  • Precip. probability: 37%
  • Precipitation: 0.04"
  • Wind: 14mphN 356°
  • Humidity: 78%
  • UV index: 3
  • Sunrise: 7:25 am EDT
  • Sunset: 6:51 pm EDT
  • ▼
On Saturday, in Port Saint John, expect showers at times, with periods of lighter rain during the day.
Minimal precipitation is anticipated for today. Temperature readings will slightly shift from a daytime peak of a temperate 78.8°F to a nighttime low of a delightful 69.8°F.
Today, the anticipated temperature will match October's typical high of 81.7°F.
Sunrise was at 7:25 am and sunset will be at 6:51 pm; the daylight will last for 11h and 26min.

Sunday Oct 18, 2026

  • 81°F
  • 72°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 23%
  • Precipitation: 0.16"
  • Wind: 18mphNE 34°
  • Humidity: 65%
  • UV index: 6
  • Sunrise: 7:25 am EDT
  • Sunset: 6:50 pm EDT
  • ▼
Tomorrow, in Port Saint John, clouds and sunshine will alternate throughout the day.
The likelihood of rain is low, and light precipitation is predicted. Minor temperature variations are anticipated, peaking at a maximum of a moderately hot 80.6°F and dropping to a minimum of a pleasant 71.6°F.
The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is estimated at 82.4°F.
October's usual high of 81.7°F is anticipated to be matched by the day’s maximum temperature.
Sunrise will be at 7:25 am and sunset at 6:50 pm; tomorrow's daylight will last for 11h and 25min.

10-day overview

Daily temperatures

Maximum temperature: 82°C.
Coldest day: today 79°C.

Chance of precipitation

Highest chance: Sunday 25.10. 45%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 79°F
  • 70°F
Showers
Showers
  • Precip. probability: 37%
  • Precipitation: 0.04"
  • Wind: 14mphN 356°
  • Humidity: 78%
  • UV index: 3
  • Sunrise: 7:25 am EDT
  • Sunset: 6:51 pm EDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 81°F
  • 72°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 23%
  • Precipitation: 0.16"
  • Wind: 18mphNE 34°
  • Humidity: 65%
  • UV index: 6
  • Sunrise: 7:25 am EDT
  • Sunset: 6:50 pm EDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 81°F
  • 64°F
Showers
Showers
  • Precip. probability: 39%
  • Precipitation: 0.08"
  • Wind: 17mphNNE 28°
  • Humidity: 69%
  • UV index: 7
  • Sunrise: 7:26 am EDT
  • Sunset: 6:49 pm EDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 81°F
  • 64°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 13mphN 6°
  • Humidity: 62%
  • UV index: 7
  • Sunrise: 7:27 am EDT
  • Sunset: 6:48 pm EDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 82°F
  • 63°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 12mphN 2°
  • Humidity: 62%
  • UV index: 7
  • Sunrise: 7:27 am EDT
  • Sunset: 6:47 pm EDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 81°F
  • 63°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 11mphN 0°
  • Humidity: 59%
  • UV index: 7
  • Sunrise: 7:28 am EDT
  • Sunset: 6:46 pm EDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 82°F
  • 66°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 11mphN 10°
  • Humidity: 59%
  • UV index: 7
  • Sunrise: 7:29 am EDT
  • Sunset: 6:45 pm EDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 81°F
  • 68°F
Showers
Showers
  • Precip. probability: 37%
  • Precipitation: 0.12"
  • Wind: 14mphNNE 22°
  • Humidity: 69%
  • UV index: 7
  • Sunrise: 7:29 am EDT
  • Sunset: 6:44 pm EDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 81°F
  • 64°F
Showers
Showers
  • Precip. probability: 45%
  • Precipitation: 0.2"
  • Wind: 16mphNNE 22°
  • Humidity: 69%
  • UV index: 7
  • Sunrise: 7:30 am EDT
  • Sunset: 6:44 pm EDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 81°F
  • 66°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 14mphNNE 12°
  • Humidity: 67%
  • UV index: 7
  • Sunrise: 7:30 am EDT
  • Sunset: 6:43 pm EDT
  • ▼
During the ten-day period, wet, dull and clear weather is predicted.
Rain is forecasted for Saturday through Monday, next Saturday and Sunday.
The temperature shift across days will be subtle in the upcoming period. Highs will range from 78.8°F to 82.4°F, while the lowest temperature will be between 62.6°F and 71.6°F.
The warmest days in Port Saint John will be Wednesday and Friday, with a maximum of 82.4°F; today is the coldest day, with a maximum temperature of 78.8°F.
Updated: Oct 17, 2026 @ 18:31:44 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, in Port Saint John, scattered showers will occur throughout the day, with lighter rain expected during the afternoon.

Today, there is a low probability of minimal rainfall in Port Saint John.

Today, the highest temperature will be 78.8°F, while the lowest temperature will be 69.8°F.
Today, the maximum temperature will be in line with the average highest temperature in October. Today, the lowest temperature will be also in line with the average low temperature.

On Saturday, in Port Saint John, sunrise was at 7:25 am and sunset will be at 6:51 pm (EDT).

In Port Saint John, today, there will be 11h and 26min of daylight.

Tomorrow, the sky will feature a blend of clouds and sunshine.

Light precipitation of 0.16" is forecasted. The likelihood of rainfall is 23%.

Tomorrow, the highest temperature will be 80.6°F, while the lowest temperature will be 71.6°F. The maximum heat index, which integrates air moisture with ambient temperature, is calculated to be 82.4°F.
The highest temperature will be in line with the average maximum of 81.7°F in October. Tomorrow, the lowest temperature will be also in line with the average low temperature.

On Sunday, in Port Saint John, sunrise will be at 7:25 am and sunset at 6:50 pm (EDT).

In Port Saint John, the length of the day tomorrow will be 11h and 25min.