| NWS Forecast for: Islip, Long Island Mac Arthur Airport NY Issued by: National Weather Service New York, NY Last Update: 2:16 am EDT Apr 18, 2026 | |
Overnight: Partly cloudy, with a low around 49. Calm wind. Saturday: Partly sunny, with a high near 58. East wind 5 to 9 mph. Saturday Night: A 30 percent chance of showers, mainly after 5am. Patchy fog after 11pm. Otherwise, cloudy, with a low around 46. Southeast wind around 5 mph becoming calm in the evening. Sunday: A chance of showers and thunderstorms before 8am, then showers and possibly a thunderstorm between 8am and 2pm, then showers after 2pm. High near 58. South wind 5 to 14 mph becoming northwest in the morning. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Sunday Night: Cloudy during the early evening, then gradual clearing, with a low around 39. Northwest wind around 6 mph. Monday: Mostly sunny, with a high near 52. Monday Night: Mostly clear, with a low around 34. Tuesday: Sunny, with a high near 51. Tuesday Night: Partly cloudy, with a low around 41. Wednesday: Partly sunny, with a high near 60. Wednesday Night: Partly cloudy, with a low around 43. Thursday: Sunny, with a high near 62. Thursday Night: Partly cloudy, with a low around 47. Friday: Partly sunny, with a high near 62. | |
| Islip, Long Island Mac Arthur Airport NY 40.78°N 73.09°W (Elev. 49 ft) | |
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