Islip, NY Weather

Suffolk County6:02 AM EDT40.73°N, 73.21°WElevation 13 ft
Coastal Flood Advisory from 5:00 PM Wed until 9:00 PM Wed

Current conditions

Clear
52°
Clear
Feels like 52°
High 60°·Low 45°
WindNNE 15 mph gusts 21 mph
Humidity62%
Dew point39°
Pressure30.20 inHg
Visibility10 mi
Cloud cover43%
UV index0 Low
Sunrise7:11 AM
Sunset6:05 PM

Observed at Islip, Long Island Mac Arthur Airport · 22 min ago

Forecast

10-day

  • Wednesday

    Mostly sunny. High near 60, with temperatures falling to around 57 in the afternoon. Northeast wind around 17 mph, with gusts as high as 30 mph.

  • Wednesday Night

    Mostly cloudy, with a low around 45. North wind around 16 mph, with gusts as high as 29 mph.

  • Thursday

    Mostly sunny. High near 65, with temperatures falling to around 62 in the afternoon. North wind around 16 mph.

National Weather Service forecast updated 1 day ago.

Hourly

Hourly forecast
  1. Now Mostly Sunny 47°
  2. 7 AM Mostly Sunny 46°
  3. 8 AM Mostly Sunny 47°
  4. 9 AM Mostly Sunny 49°
  5. 10 AM Mostly Sunny 52°
  6. 11 AM Mostly Sunny 52°
  7. 12 PM Mostly Sunny 54°
  8. 1 PM Mostly Sunny 56°
  9. 2 PM Partly Sunny 57°
  10. 3 PM Partly Sunny 57°
  11. 4 PM Partly Sunny 58°
  12. 5 PM Partly Sunny 57°
  13. 6 PM Mostly Cloudy 55°
  14. 7 PM Mostly Cloudy 54°
  15. 8 PM Mostly Cloudy 54°
  16. 9 PM Mostly Cloudy 52°
  17. 10 PM Mostly Cloudy 51°
  18. 11 PM Mostly Cloudy 50°
  19. Thu12 AM Mostly Cloudy 49°
  20. 1 AM Mostly Cloudy 48°
  21. 2 AM Mostly Cloudy 47°
  22. 3 AM Mostly Cloudy 46°
  23. 4 AM Mostly Cloudy 46°
  24. 5 AM Mostly Cloudy 46°

10-day forecast

Details
  1. TueOct 20 Sunny Sunny46°66°
  2. TodayOct 21 Mostly Sunny Mostly Sunny45°60°
  3. ThuOct 22 Mostly Sunny Mostly Sunny44°65°
  4. FriOct 23 Sunny Sunny43°57°
  5. SatOct 24 Sunny Sunny44°57°
  6. SunOct 25 Sunny Sunny49°63°
  7. MonOct 26 Mostly Sunny Mostly Sunny50°66°
  8. TueOct 27 Mostly sunny Mostly sunny47°69°
  9. WedOct 28 Cloudy Cloudy0.02 in51°59°
  10. ThuOct 29 Mostly sunny Mostly sunny44°55°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

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Weather news near Islip

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Air quality

26
Good
Ozone

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • WedGood (26)

Long Island Region, NY reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:11 AM
Sunset 6:05 PM
Daylight 10 h 54 min (−2 min 33 s tomorrow)
Waxing Gibbous · 76% lit
Moonrise 3:45 PM Moonset 2:09 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low62° / 45°
Record high77° (2024)
Record low29° (1974)
Wettest1.51 in (1995)
Month to date1.98 in (normal 2.57 in)

Islip Area, records since 1963. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in OKX, issued 1 hr ago

What Has Changed

Updated for Aviation. Coastal Flood Advisories now in effect for late this afternoon/early this evening high tide for the south shore back bays of Nassau and western Great South Bay.

Key Messages

1) Mainly dry conditions will continue into early next week with gusty N-NE winds continuing through the end of this week.

2) Minor coastal flooding expected across the south shore back bays of Nassau, western portions of the Great South Bay, and lower NY Harbor with late this afternoon/early evening high tide. Additional localized minor coastal flooding possible on Thursday.

Key Message 1

The low pressure/nor'easter located about 350 miles southeast of Fire Island will continue meandering today before gradually picking up speed tonight, then track ENE-NE away from the coast Thursday into Friday.

The main sensible weather impact will be from the continuation of gusty N-NE winds, especially close to the coast. Gusts 25-35 mph are anticipated with a low chance of a few immediate coast locations reaching 40 mph, mainly along the southeast coast of Long Island. Further inland, gusts 20-25 mph are expected. Gusts may become occasional or end away from the coast tonight where gusts 25-35 mph remain possible. By Thursday, gusts should be weaker as the storm starts moving further offshore.

Otherwise, a weak surface trough/cold front will move across the northeast late Thursday into Thursday night. This is associated with a fast moving northern stream trough that will help push the storm well offshore. Behind these systems, high pressure will reestablish itself over southeast Canada Thursday night and then builds over the northeast Friday into the weekend. The high will remain in control into early next week.

The forecast is largely dry through the next week. The only exception is for the east end/forks of Long Island where a brief shower is possible this evening as some moisture could pivot well NW of the offshore storm. There is a good amount of low level dry air to overcome, so it may just end up being a few sprinkles.

Mid and upper level clouds will increase from the SE through the day today with mostly cloudy conditions likely for eastern half of the area. These clouds will diminish late tonight into Thursday. Mostly clear conditions are then forecast through early next week.

The warmest day for the rest of the week will be Thursday where highs will reach the low to mid 60s. Temperatures should then be a bit below normal until a warming trend begins early next week.

Outlook For 06z Thursday Through Sunday

Thursday and Friday: VFR. N winds G15-20kt.

Saturday and Sunday: VFR.

Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.