Port Saint John, FL Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Port Saint John, FL in one place.
A slight chance of rain showers before 8am, then a slight chance of showers and thunderstorms between 1pm and 2pm. Mostly sunny, with a high near 89. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Port Saint John, FL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: May 24, 2026 1:19 PM EDT.
The active forecast window currently covers May 25 to May 30, 2026 for Port Saint John, FL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 25 to May 30, 2026
- Latest sync
- May 24, 2026 1:19 PM EDT
- Forecast office
- MLB
- Source
- NOAA / NWS
Daily Outlook
This Week in Port Saint John
Tuesday looks like the warmest upcoming period in Port Saint John at 90 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 74 degrees F.
The strongest winds are forecast for Memorial Day at about 5 to 15 mph SE.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- May 24, 2026 1:19 PM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- MLB
- Radar station
- KMLB
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 78. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
A slight chance of rain showers between 8am and 11am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 77. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms after 8am. Mostly cloudy, with a high near 89. Southeast wind 5 to 10 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. South southeast wind 0 to 10 mph. Chance of precipitation is 50%.
A slight chance of showers and thunderstorms before 8am, then showers and thunderstorms likely. Partly sunny, with a high near 90. South southeast wind 0 to 10 mph. Chance of precipitation is 70%.
Showers and thunderstorms likely before 2am. Mostly cloudy, with a low around 74. South wind 0 to 5 mph. Chance of precipitation is 70%.
Showers and thunderstorms likely after 8am. Partly sunny, with a high near 90. Southwest wind 0 to 10 mph. Chance of precipitation is 70%.
Showers and thunderstorms likely before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 74. South southwest wind 0 to 5 mph. Chance of precipitation is 70%.
Showers and thunderstorms after 8am. Partly sunny, with a high near 88. Southwest wind 5 to 10 mph. Chance of precipitation is 90%.
Showers and thunderstorms. Mostly cloudy, with a low around 74. South southwest wind 5 to 10 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Memorial Day
May 25
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
89°F |
5 to 15 mph
SE
|
|
Monday Night
May 25
|
Partly Cloudy
|
78°F |
5 to 15 mph
SE
|
|
Tuesday
May 26
|
Slight Chance Showers And Thunderstorms
|
90°F |
5 to 15 mph
SE
|
|
Tuesday Night
May 26
|
Slight Chance Showers And Thunderstorms
|
77°F |
5 to 15 mph
SE
|
|
Wednesday
May 27
|
Chance Showers And Thunderstorms
|
89°F |
5 to 10 mph
SE
|
|
Wednesday Night
May 27
|
Chance Showers And Thunderstorms
|
74°F |
0 to 10 mph
SSE
|
|
Thursday
May 28
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
90°F |
0 to 10 mph
SSE
|
|
Thursday Night
May 28
|
Showers And Thunderstorms Likely
|
74°F |
0 to 5 mph
S
|
|
Friday
May 29
|
Showers And Thunderstorms Likely
|
90°F |
0 to 10 mph
SW
|
|
Friday Night
May 29
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
74°F |
0 to 5 mph
SSW
|
|
Saturday
May 30
|
Showers And Thunderstorms
|
88°F |
5 to 10 mph
SW
|
|
Saturday Night
May 30
|
Showers And Thunderstorms
|
74°F |
5 to 10 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Port Saint John.
