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WEATHER ALERT: Heat Index To Approach 110 On Sunday In Boca Raton, Delray Beach, Boynton

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Extreme Heat
Extreme Heat
Expect extreme heat on Sunday in Boca Raton, Delray Beach, Boynton Beach, and beyond.

BOCA RATON, FL (BocaNewsNow.com) (Copyright © 2026 MetroDesk Media, LLC) — From hot to hotter. Forecasters at the National Weather Service Saturday say the heat index — the “real feel” temperature — will near 110 degrees on Sunday. The heat will remain for the week as thunderstorms roll in. Here’s the forecast from the NWS:

Tonight: Showers and thunderstorms likely before 2am, then a slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 78. Southwest wind 3 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. 

Sunday: Showers and thunderstorms likely, mainly after 3pm. Some of the storms could produce heavy rainfall. Mostly sunny, with a high near 93. Heat index values as high as 108. West wind 5 to 7 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible. 

Sunday Night: Showers and thunderstorms likely, mainly before 8pm. Some of the storms could produce heavy rainfall. Cloudy, then gradually becoming partly cloudy, with a low around 77. West wind around 6 mph becoming south in the evening. Chance of precipitation is 60%.

Monday: Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 93. West wind 6 to 8 mph. Chance of precipitation is 70%.

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Monday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 77. Southwest wind around 6 mph. Chance of precipitation is 60%.

Tuesday: Showers and thunderstorms, mainly after 2pm. High near 92. Southwest wind 6 to 11 mph. Chance of precipitation is 80%.

Tuesday Night: Showers and thunderstorms, mainly before 8pm. Low around 78. Southwest wind around 8 mph. Chance of precipitation is 80%.

Wednesday: Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 93. Southwest wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

Wednesday Night: Showers and thunderstorms likely before 8pm. Partly cloudy, with a low around 78. Chance of precipitation is 60%.

Thursday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.

Thursday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.

Friday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.

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