HEAT ALERT: Hottest weather in years is possible this week

Temperatures will feel as high as 110F during the heat wave that starts on Sunday. We will let you know how long the heat lasts and how hot it will get.

Alex Calamia

Jun 21, 2025, 10:25 AM

Updated 4 hr ago

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WHAT TO KNOW:
  • Long Island is under an EXTREME HEAT WATCH. The warning does not include Nassau or Suffolk County yet
  • Heat Index Values could be higher than 105F on Monday and Tuesday
  • A thunderstorm is possible Sunday morning, otherwise it is dry for most of this forecast
TODAY: Summer Feel
It's a nice day with highs in the mid 80s. Humidity increases overnight with a stray PM shower.
SUNDAY: Heat Wave begins
A morning thunderstorm is possible. High temperatures will soar into the mid 90s inland, in the 80s for the beach and east. It will feel like more than 100 degrees.
MONDAY: Record Heat Possible
Extreme Heat is likely. Heat Index Values could reach 110F with temperatures in the upper 90s. Temperatures near 90 for the beach and east.
TUESDAY: Another Record Hot Day Possible.
Extreme Heat is likely. Heat Index Values could reach 110F. Temperatures may approach 100F inland. Temperatures near 90 for the beach and east.
WEDNESDAY: Less Extreme Heat
Hot & mainly sunny. Highs in the upper 80s.
Rest of Week: More Seasonable.
Temperatures return to normal. Highs will be in the low 80s. Rain is not likely.