Fire Island (FI) and NYC Weather

🌤️ Weather Forecast – September 15, 2026 (1 PM Update)

📍 NYC & Fire Island

Today and tomorrow will feature beautiful weather, with low humidity and pleasant temperatures. 😎

More humid air will move into the area by Thursday. Friday and Saturday should be beautiful, but conditions will become unsettled on Sunday and remain that way into the beginning of next week.

⚠️ Mosquito Alert: Mosquito populations have increased significantly. Be sure to use insect repellent and eliminate any standing water around your home.

⚠️ Important Tick Information: They are really out now, so be careful!

https://www.facebook.com/groups/141584049360024/permalink/3155886817929717/

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🌀 Hurricane Update

NHC Tropical Weather Outlook:

https://www.nhc.noaa.gov/gtwo.php?basin=atlc&fdays=7

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🌊 Water Temperatures

* 🌊 Atlantic Ocean: 72°F

* 🌅 Great South Bay: 73°F

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🔗 Tides

NOAA Tide Predictions – Cherry Grove (Ocean)

https://tidesandcurrents.noaa.gov/noaatidepredictions.html?id=8515228&units=standard&bdate=20260915&edate=20260916&timezone=LST/LDT&clock=12hour&datum=MLLW&interval=hilo&action=dailychart

Great South Bay – Sayville (Brown Creek)

https://www.tide-forecast.com/locations/Sayville-Brown-Creek-Long-Island-New-York/tides/latest

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💧 How Dew Points Feel

* 🌵 Below 55°F: Dry and comfortable

* 🙂 55–60°F: Pleasant

* 😐 60–65°F: Becoming humid

* 🥵 65–70°F: Muggy

* 🔥 70–75°F: Very muggy and oppressive

* ⚠️ Above 75°F: Extreme humidity with an increased risk of heat stress

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📅 Detailed Forecast

Tuesday • September 15

* 🌤️ Mainly sunny

* 🌬️ Variable winds: 5–15 mph

* 🌡️ Highs: Low 70s

* 💧 Dew Point: Around 50°F

* 🔒 Confidence: High

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Tonight

* 🌙 Mainly clear

* 🌬️ Variable winds: 5–10 mph

* 🌡️ Lows: Mid to upper 50s

* 💧 Dew Point: Rising into the upper 50s by morning

* 🔒 Confidence: High

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Wednesday • September 16

* 🌤️ Mainly sunny

* 🌬️ Variable winds: 5–10 mph

* 🌡️ Highs: Upper 70s

* 💧 Dew Point: Low 60s in NYC; mid-60s on Fire Island

* 🔒 Confidence: High

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Thursday • September 17

* 🌤️ Sunshine followed by some late-day clouds

* 🌬️ Southwest winds: 5–10 mph

* 🌡️ Highs: Mid-80s in NYC

* 💧 Dew Point: Mid-60s in NYC; upper 60s on Fire Island

* 🔒 Confidence: High

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Friday • September 18

* 🌤️ Mainly sunny

* 🌬️ Northeast winds: 5–15 mph

* 🌡️ Highs: Upper 70s to low 80s

* 💧 Dew Point: Low 50s

* 🔒 Confidence: High

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Saturday • September 19

* ☀️ Mainly sunny

* 🌬️ Northeast winds: 5–15 mph

* 🌡️ Highs: Low 80s

* 💧 Dew Point: Low 50s

* 🔒 Confidence: Medium

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Sunday • September 20

* 🌧️ Scattered showers and thunderstorms possible

* 🌬️ South winds: 5–15 mph

* 🌡️ Highs: Low 80s

* 💧 Dew Point: Low 70s

* 🔒 Confidence: Low

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Monday • September 21

* 🌦️ Showers and thunderstorms possible

* 🌬️ Southwest winds: 5–15 mph

* 🌡️ Highs: Low 80s

* 💧 Dew Point: Low 70s

* 🔒 Confidence: Low

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Tuesday • September 22

* 🌦️ Showers and thunderstorms possible

* 🌬️ Variable winds: 5–10 mph

* 🌡️ Highs: Low 80s

* 💧 Dew Point: Low 70s

* 🔒 Confidence: Low

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Mitchel Volk, MS – Meteorologist, MBA

🌤️ FI NYC Weather

🌀 “We’ve got your weather—coming and going.”