Fire Island (FI) and NYC Weather

🌤️ Weather Forecast – October 18, 2026 (Noon Update)

📍 NYC & Fire Island

🍂 A stretch of cool fall weather is ahead, with generally sunny skies lasting through next weekend. Some clouds will mix in early in the week, especially on Monday, but the outlook remains dry.

🌊 Northeast winds and high surf will bring some beach erosion during the first part of the week, even with the storm remaining offshore.

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

⚠️ Important Tick Information: Ticks are very active, so be careful!

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

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🌀 Hurricane Update

For the latest tropical outlook, visit the National Hurricane Center:

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

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🌊 Water Temperatures

• 🌊 Atlantic Ocean: 63°F

• 🌅 Great South Bay: 63°F

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🔗 Tides

NOAA Tide Predictions – Cherry Grove (Ocean):

https://tidesandcurrents.noaa.gov/noaatidepredictions.html?id=8515228&bdate=20261018&edate=20261019&datum=MLLW&units=standard&clock=12hour&threshold=greaterThan&thresholdvalue=&timezone=LST%2FLDT&interval=hilo&action=dailychart&legacy=false

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

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Sunday • October 18

• 🌤️ Mainly sunny

• 🌬️ Winds: Northeast at 5–15 mph

• 🌡️ Highs: Upper 50s

• 💧 Dew Point: Low 30s

• 🔒 Confidence: High

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Tonight

• 🌙 Mainly clear

• 🌬️ Winds: Northeast at 5–15 mph

• 🌡️ Lows: Low 40s

• 💧 Dew Point: Upper 30s

• 🔒 Confidence: High

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Monday • October 19

• 🌥️ Increasing clouds

• 🌬️ Winds: Northeast at 5–15 mph

• 🌡️ Highs: Low 60s

• 💧 Dew Point: Mid-30s

• 🔒 Confidence: High

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Tuesday • October 20

• 🌤️ High clouds in the southern sky

• 🌬️ Winds: North at 5–15 mph

• 🌡️ Highs: Mid-60s

• 💧 Dew Point: Low 30s

• 🔒 Confidence: High

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Wednesday • October 21

• 🌤️ High clouds in the southern sky

• 🌬️ Winds: Northeast at 5–15 mph

• 🌡️ Highs: Mid-60s

• 💧 Dew Point: Low 30s

• 🔒 Confidence: High

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Thursday • October 22

• 🌤️ Mainly sunny

• 🌬️ Winds: North at 10–15 mph

• 🌡️ Highs: Mid-60s

• 💧 Dew Point: Mid-40s

• 🔒 Confidence: High

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Friday • October 23

• ☀️ Mainly sunny

• 🌬️ Winds: Northeast at 5–15 mph

• 🌡️ Highs: Mid-50s

• 💧 Dew Point: Mid-30s

• 🔒 Confidence: High

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Saturday • October 24

• ☀️ Mainly sunny

• 🌬️ Winds: Northeast at 5–15 mph

• 🌡️ Highs: Mid-50s

• 💧 Dew Point: Mid-30s

• 🔒 Confidence: Medium

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Sunday • October 25

• 🌤️ Mainly sunny

• 🌬️ Winds: Southwest at 5–15 mph

• 🌡️ Highs: Low 60s

• 💧 Dew Point: Low 30s

• 🔒 Confidence: Low

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Mitchel Volk, MS – Meteorologist, MBA

🌤️ FI NYC Weather

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