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Clouds increase tonight, but sunshine gradually develops with lower humidity Friday

It will be variably cloudy this evening with a general increase in clouds overnight and lowering humidity. It will be mostly dry other than a stray shower into early Friday morning.

Matt Hammer

Sep 10, 2026, 3:40 PM

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Islip Information

Islip Information

Islip, New York • Climate data: Islip MacArthur Airport (ISP)
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THIS EVENING AND OVERNIGHT

After a nice, albeit warm and humid, afternoon following a quick round of early morning showers, this evening and tonight will be enjoyable, weather-wise. Expect varying amounts of clouds during the evening. It will still be warm and noticeably humid, but dry.

The humidity lowers overnight, and it begins to feel more comfortable under a mainly cloudy sky into early Friday morning. There is a very small chance for a stray shower into early Friday morning, but most of the time will be dry with just more clouds around. Low temperatures into the morning will be in the mid- to upper 60s.

9-11 CEREMONIES FORECAST

It will be cloudy to start the morning, but clouds will gradually give way to more sunshine through the morning, with a mostly sunny sky developing into the afternoon. The day will end up very nice weather-wise, with low humidity and highs in the mid- to upper 70s paired with that developing sunshine.

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MARINE

There will continue to be a high risk of rip currents at the Atlantic Ocean beaches through tonight and a moderate rip current risk, but improving water conditions overall into Friday.

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Long Island Rip Currents

EXTENDED FORECAST

TONIGHT: Variably cloudy this evening, but becoming mostly cloudy tonight and overnight. Most of the night is dry other than a stray light rain shower. The humidity will continue to lower into Friday morning, too. Low temperatures will be in the mid- to upper 60s early Friday morning. Wind: West-northwest 5 to 15 mph.

FRIDAY: 9-11 | START OF ROSH HASHANAH -- There is a very small chance for an early morning rain shower before around 6 a.m. Otherwise, clouds gradually give way to a mostly sunny sky with low humidity and high temperatures around 78 degrees. WIND: north-northwest 5 to 15 mph. UV INDEX: 6 (high). BOATERS: No advisories, but there will be a moderate rip current risk along the South Shore. Lows in the upper 50s to lower 60s into Saturday morning.

SATURDAY: Sun and clouds to start. Becoming mostly cloudy with showers arriving late at night. Highs around 76 degrees. Scattered showers will be possible at night. Lows near 65 degrees.

SUNDAY: Rain likely in the morning, with gradual improvements throughout the day. Highs around 79 degrees. Lows near 65 degrees.

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MONDAY: Mostly sunny and warm with highs around 78 degrees. Lows near 64 degrees.

TUESDAY: Mostly sunny with highs around 77 degrees. Lows near 66 degrees.

WEDNESDAY: Partly sunny with a pop-up rain shower chance. Highs around 80 degrees. Lows near 67 degrees.

THURSDAY: Sun and clouds. Chance of a few evening showers. Highs around 78 degrees. Lows near 65 degrees.

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