National Weather Service Tampa Bay rain chances and high temperatures September 17, 2025
TAMPA BAY, Florida – The National Weather Service (NWS) Tampa Bay has issued a forecast for west Central Florida and Southwest Florida on Wednesday, September 17, 2025, forecasting scattered to numerous showers and thunderstorms mainly in the afternoon with highs in the low 90s across the region. Moisture and instability will support storm development, with potential for heavy downpours leading to localized flooding. Rain chances vary from 40% in northern areas to 70% in southern areas like Fort Myers.
The forecast covers areas such as Tampa, St. Petersburg, Sarasota, and Fort Myers.
Today
Scattered showers and thunderstorms after 11am. Mostly cloudy, with a high near 92. Heat index values as high as 102. South southwest wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Scattered showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 76. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Thursday
Isolated showers, then possibly a thunderstorm after 1pm, then showers and thunderstorms likely after 2pm. Mostly cloudy, with a high near 90. Heat index values as high as 100. Southwest wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 75. Southwest wind around 5 mph becoming calm. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before 11am, then scattered showers and thunderstorms between 11am and 2pm, then showers and thunderstorms after 2pm. Cloudy, with a high near 88. West wind 5 to 8 mph. Chance of precipitation is 80%.
Friday Night
Showers and thunderstorms before 8pm, then showers likely. Mostly cloudy, with a low around 74. West wind around 6 mph. Chance of precipitation is 70%.
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