Observed 2:55 PM EDT at KISP

Islandia, NY weather

Sunny and 63°17°, jacket by 7 PM.

Forecasts agree

Now 63°17°

Sunny

Wind: 7 mph11 km/h; From the north-northwest. Up to 7 mph11 km/h through 3 AM
Dew point: 37°3°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Air today: 50Good; EPA forecast · PM2.5 (fine particles)
Pressure: 30.51 inHg1033 hPa; Falling slowly · −0.04 inHg−1.2 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Below 50°10° tonight after 8 PM
Low 38°3° tonight at 5 AM
Above 50°10° tomorrow by 10 AM

This afternoonNear 60°16° · Partly cloudy
TonightDown to 38°3° by 5 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 63°17° by 3 PM · Clear
Tomorrow nightDown to 41°5° by 5 AM · Clear
Monday morningUp to 57°14° by 11 AM · Clear
Monday afternoonUp to 65°18° by 2 PM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 3p	Sunny	60°16° (likely 59°15° to 61°16°)	60°16°	0%	5 mph8 km/h from NW, gusts 7 mph12 km/h	42%	43%	2
Sat 4p	Partly sunny	60°16° (likely 59°15° to 61°16°)	60°16°	0%	3 mph5 km/h from NW, gusts 7 mph12 km/h	42%	49%	1
Sat 5p	Partly sunny	59°15° (likely 57°14° to 60°16°)	59°15°	0%	3 mph5 km/h from NW, gusts 7 mph11 km/h	42%	64%	0
Sat 6p	Partly cloudy	56°13° (likely 53°12° to 56°13°)	56°13°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	47%	58%	0
Sat 7p	Mostly clear	54°12° (likely 51°11° to 54°12°)	54°12°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	52%	63%	0
Sat 8p	Mostly clear	48°9° (likely 48°9° to 51°11°)	48°9°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	68%	33%	0
Sat 9p	Mostly clear	46°8° (likely 46°8° to 49°9°)	46°8°	0%	1 mph2 km/h from W, gusts 5 mph8 km/h	73%	23%	0
Sat 10p	Clear	45°7° (likely 45°7° to 48°9°)	45°7°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	76%	7%	0
Sat 11p	Clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	1 mph2 km/h from W, gusts 5 mph9 km/h	82%	2%	0
Sun 12a	Clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	1 mph2 km/h from NW, gusts 6 mph10 km/h	86%	0%	0
Sun 1a	Clear	42°6° (likely 42°6° to 45°7°)	42°6°	0%	1 mph2 km/h from NW, gusts 6 mph10 km/h	82%	0%	0
Sun 2a	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	1 mph2 km/h from NW, gusts 6 mph10 km/h	89%	1%	0
Sun 3a	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	1 mph2 km/h from N, gusts 6 mph10 km/h	85%	1%	0
Sun 4a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	2 mph3 km/h from N, gusts 7 mph11 km/h	85%	0%	0
Sun 5a	Clear	38°3° (likely 38°3° to 45°7°)	38°3°	0%	2 mph3 km/h from N, gusts 6 mph10 km/h	92%	1%	0
Sun 6a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	2 mph3 km/h from N, gusts 6 mph10 km/h	89%	2%	0
Sun 7a	Sunny	39°4° (likely 38°3° to 45°7°)	39°4°	0%	2 mph3 km/h from N, gusts 5 mph9 km/h	89%	2%	0
Sun 8a	Sunny	40°4° (likely 39°4° to 45°7°)	40°4°	0%	2 mph3 km/h from N, gusts 6 mph9 km/h	89%	1%	0
Sun 9a	Sunny	47°8° (likely 44°7° to 48°9°)	47°8°	0%	2 mph3 km/h from N, gusts 5 mph9 km/h	71%	3%	1
Sun 10a	Sunny	52°11° (likely 52°11° to 55°13°)	52°11°	0%	3 mph5 km/h from N, gusts 6 mph9 km/h	61%	0%	2
Sun 11a	Sunny	57°14° (likely 57°14° to 59°15°)	57°14°	0%	3 mph5 km/h from N, gusts 6 mph9 km/h	53%	0%	3
Sun 12p	Sunny	59°15° (likely 59°15° to 62°17°)	59°15°	0%	3 mph5 km/h from N, gusts 7 mph12 km/h	47%	0%	4
Sun 1p	Sunny	61°16° (likely 61°16° to 64°18°)	61°16°	0%	3 mph5 km/h from NW, gusts 7 mph11 km/h	42%	0%	4
Sun 2p	Sunny	62°17° (likely 62°17° to 65°18°)	62°17°	0%	3 mph5 km/h from NW, gusts 6 mph10 km/h	39%	0%	4
Sun 3p	Sunny	63°17° (likely 63°17° to 66°19°)	63°17°	0%	3 mph5 km/h from W, gusts 6 mph9 km/h	38%	0%	3
Sun 4p	Sunny	63°17° (likely 62°17° to 65°18°)	63°17°	0%	3 mph5 km/h from SW, gusts 5 mph7 km/h	39%	0%	2
Sun 5p	Sunny	62°17° (likely 60°16° to 63°17°)	62°17°	0%	3 mph5 km/h from S, gusts 6 mph10 km/h	43%	0%	1
Sun 6p	Clear	59°15° (likely 54°12° to 59°15°)	59°15°	0%	3 mph5 km/h from S, gusts 8 mph13 km/h	49%	0%	0
Sun 7p	Clear	55°13° (likely 51°11° to 55°13°)	55°13°	0%	3 mph5 km/h from SW, gusts 8 mph13 km/h	61%	0%	0
Sun 8p	Clear	50°10° (likely 49°9° to 52°11°)	49°9°	0%	3 mph5 km/h from SW, gusts 10 mph15 km/h	77%	0%	0
Sun 9p	Clear	49°9° (likely 49°9° to 51°11°)	48°9°	0%	3 mph5 km/h from SW, gusts 11 mph17 km/h	80%	0%	0
Sun 10p	Clear	48°9° (likely 48°9° to 51°11°)	48°9°	0%	2 mph3 km/h from SW, gusts 10 mph16 km/h	83%	1%	0
Sun 11p	Clear	46°8° (likely 46°8° to 50°10°)	46°8°	0%	2 mph3 km/h from SW, gusts 9 mph14 km/h	93%	2%	0
Mon 12a	Clear	45°7° (likely 45°7° to 49°9°)	45°7°	0%	2 mph3 km/h from W, gusts 10 mph16 km/h	93%	1%	0
Mon 1a	Clear	45°7° (likely 45°7° to 49°9°)	44°7°	0%	3 mph5 km/h from W, gusts 11 mph18 km/h	93%	0%	0
Mon 2a	Clear	44°7° (likely 44°7° to 48°9°)	42°6°	0%	3 mph5 km/h from W, gusts 11 mph17 km/h	96%	1%	0
Mon 3a	Clear	43°6° (likely 43°6° to 46°8°)	41°5°	0%	3 mph5 km/h from W, gusts 10 mph16 km/h	96%	1%	0
Mon 4a	Clear	42°6° (likely 42°6° to 46°8°)	40°4°	0%	3 mph5 km/h from W, gusts 11 mph18 km/h	96%	1%	0
Mon 5a	Clear	41°5° (likely 41°5° to 45°7°)	39°4°	0%	3 mph5 km/h from W, gusts 10 mph17 km/h	100%	1%	0
Mon 6a	Clear	40°4° (likely 40°4° to 45°7°)	38°3°	0%	3 mph5 km/h from W, gusts 11 mph17 km/h	100%	2%	0
Mon 7a	Sunny	41°5° (likely 41°5° to 46°8°)	38°3°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	96%	14%	0
Mon 8a	Sunny	42°6° (likely 41°5° to 48°9°)	39°4°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	96%	10%	0
Mon 9a	Sunny	47°8° (likely 46°8° to 55°13°)	45°7°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	83%	15%	1
Mon 10a	Sunny	52°11° (likely 52°11° to 58°14°)	52°11°	0%	6 mph10 km/h from W, gusts 12 mph19 km/h	74%	10%	2
Mon 11a	Sunny	57°14° (likely 57°14° to 62°17°)	57°14°	0%	6 mph10 km/h from W, gusts 12 mph20 km/h	64%	15%	3
Mon 12p	Sunny	61°16° (likely 60°16° to 64°18°)	61°16°	0%	6 mph10 km/h from W, gusts 12 mph19 km/h	58%	6%	4
Mon 1p	Sunny	63°17° (likely 63°17° to 66°19°)	63°17°	0%	7 mph11 km/h from W, gusts 12 mph19 km/h	54%	2%	4
Mon 2p	Sunny	65°18° (likely 65°18° to 67°19°)	65°18°	0%	7 mph11 km/h from W, gusts 11 mph18 km/h	50%	1%	4

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Cloudy. High 60°16°, low 38°3°. Typical 61°16° / 44°7°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Partly sunny, 60°16°
  Dry
2. Evening
  6 PM–midnight
  Mostly clear, 48°9°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 38°3°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 60. Northwest wind around 5 mph.
Tonight: Patchy frost after 5am. Mostly clear, with a low around 38. Northwest wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–61°16°
Low, likely
37°3°–42°6°
Typical high / low
61°16° / 44°7°
Wind
7 mph11 km/h, gusts 14 mph22 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 63°17°, low 40°4°. Typical 61°16° / 44°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Day: Sunny, with a high near 63. Northwest wind around 3 mph.
Night: Clear, with a low around 40. Southwest wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
38°3°–44°7°
Typical high / low
61°16° / 44°7°
Wind
6 mph10 km/h, gusts 16 mph26 km/h
UV peak
4
Monday, Oct 26. Sunny. High 66°19°, low 48°9°. Typical 61°16° / 44°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  Dry
Official NWS forecast
Day: Sunny, with a high near 66. West wind 3 to 7 mph.
Night: Clear. Low around 48, with temperatures rising to around 50 overnight.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–68°20°
Low, likely
41°5°–48°9°
Typical high / low
61°16° / 44°7°
Wind
8 mph12 km/h, gusts 17 mph28 km/h
UV peak
4
Tuesday, Oct 27. Sunny. High 58°14°, low 41°5°. Typical 60°16° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 58.
Night: Mostly clear, with a low around 41.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
57°14°–58°14°
Low, likely
41°5°–50°10°
Typical high / low
60°16° / 43°6°
Wind
10 mph17 km/h, gusts 24 mph38 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 58°14°, low 46°8°. Typical 60°16° / 43°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 58°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 58.
Night: Partly cloudy, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
55°13°–60°16°
Low, likely
42°6°–46°8°
Typical high / low
60°16° / 43°6°
Wind
7 mph12 km/h, gusts 16 mph26 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 64°18°, low 51°11°. Typical 60°16° / 43°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 64.
Night: Mostly clear, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–65°18°
Low, likely
47°8°–51°11°
Typical high / low
60°16° / 43°6°
Wind
11 mph18 km/h, gusts 30 mph49 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 69°21°, low 50°10°. Typical 59°15° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 69.
Night: Mostly clear, with a low around 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
69°21°–71°22°
Low, likely
50°10°–53°12°
Typical high / low
59°15° / 42°6°
Wind
9 mph14 km/h, gusts 25 mph41 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 67°19°, low 52°11°. Typical 59°15° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–68°20°
Low, likely
50°10°–54°12°
Typical high / low
59°15° / 42°6°
Wind
9 mph14 km/h, gusts 24 mph38 km/h
UV peak
4
Sunday, Nov 1. Drizzle. High 66°19°, low 56°13°. Typical 58°14° / 42°6°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 61°16°
  30% chance · 0.02 in0.5 mm
4. Overnight
  midnight–6 AM
  Drizzle, 61°16°
  30% chance · 0.05 in1.2 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
60°16°–70°21°
Low, likely
54°12°–57°14°
Typical high / low
58°14° / 42°6°
Wind
11 mph17 km/h, gusts 23 mph37 km/h
UV peak
2
Monday, Nov 2. Drizzle. High 67°19°, low 60°16°. Typical 58°14° / 42°6°. Rain 0.73 in19 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Showers, 63°17°
  30% chance · 0.21 in5.3 mm
2. Afternoon
  noon–6 PM
  Showers, 66°19°
  20% chance · 0.28 in7.1 mm
3. Evening
  6 PM–midnight
  Showers, 65°18°
  20% chance · 0.37 in9.4 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
57°14°–65°18°
Typical high / low
58°14° / 42°6°
Wind
22 mph35 km/h, gusts 40 mph65 km/h

10 days15 days30 days

The outlook

Today
Dry, high 60°, low 38°.
Tomorrow
Dry, high 63°, low 40°, warming up.
Monday
Dry, high 66°, low 48°, warming up.
Rest of week
Mostly dry, highs 58–69°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (OKX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Carlls River at Babylon

11 mi

Level: 0.5 ft
Flow: 15 cfs

Reading from Sat 1 PM · NWS gauge page

Flax Pond at Old Field (IN MLLW)

11 mi

Below flood stage

Level: 6.2 ft

Reading from Sat 1:24 PM · NWS gauge page

Great South Bay at Watch Hill (IN MLLW)

12 mi

Below flood stage

Level: 1.9 ft

Reading from Sat 1 PM · NWS gauge page

Great South Bay at Lindenhurst (IN MLLW)

14 mi

Below flood stage

Level: 2.0 ft

Reading from Sat 1 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 67% less heating than a typical week.

This week 30Typical 93

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 24
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 14 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 37°F).

Open the windows?

Sun, 1:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Islip-Li Macarthur Airport · official normals 1991–2020 · records 1963–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

On average 1° colder than normal (daily mean temperature).

−6°−3°SunOct 18
−4°−2°MonOct 19
+3°+1°TueOct 20
+2°+1°WedOct 21
+4°+2°ThuOct 22
−4°−2°FriOct 23
—SatOct 24

Islandia weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 45 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 30 min less
Golden hour: 5:21–6:16 PM; Morning 6:56–7:52 AM
Blue hour: 6:16–6:27 PM; Morning 6:46–6:56 AM; first light 6:46 AM

Stars tonight? Fair

Mostly clear 9 PM–6:47 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:24 AM · rises 4:55 PM
Full moon: Oct 26
New moon: Nov 9

Looking south from Islandia. Open water to the horizon.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Islandia, NY weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Carlls River at Babylon

Flax Pond at Old Field (IN MLLW)

Great South Bay at Watch Hill (IN MLLW)

Great South Bay at Lindenhurst (IN MLLW)

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon