Frost Advisory
Ends in 54 min
When
Until 9 AM EDT Saturday.
Where
Northeast Suffolk and Southeast Suffolk Counties.
Issued for this forecast zone · National Weather Service Upton NY
What, impacts and precautionsHide details
What
Temperatures in the mid 30s, and locally as low 25 to 30 in parts of the Pine Barrens, will result in frost formation.
Impacts
Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Northeast Suffolk; Southeast Suffolk
See it on weather.gov (opens in a new tab)

Observed 7:50 AM EDT at KFOK

Peconic, NY weather

Sunny and 32°0°.

Mostly agree

Now 32°0°

Sunny · Feels like 29°−2°

Wind: 3 mph5 km/h; From the northwest. Up to 6 mph10 km/h through 8 PM
Dew point: 30°−1°; Dry · up to 41°5° by 9 AM (comfortable)
Humidity: 93%; Air 32°0°, dew point 30°−1° · frost likely
UV index: 0Low; Moderate 12–2 PM · peak 3
Air today: 39Good; EPA forecast · PM2.5 (fine particles)
Pressure: 30.54 inHg1034 hPa; Rising slowly · +0.03 inHg+1.1 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

18°10° cooler than this time yesterday (48°9° then, 30°−1° now)

Good hours for

Above 50°10° today by 10 AM
High 60°16° today at 3 PM
Below 50°10° tonight after 9 PM

This morningUp to 58°14° by 11 AM · Partly cloudy
This afternoonNear 60°16° · Mostly cloudy
TonightDown to 42°6° by 3 AM · Clear
Tomorrow morningUp to 54°12° by 11 AM · Clear
Tomorrow afternoonUp to 60°16° by 5 PM · Clear
Tomorrow nightDown to 49°9° by 4 AM · 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 8a	Sunny	40°4° (likely 40°4° to 49°9°)	40°4°	0%	3 mph5 km/h from N, gusts 7 mph11 km/h	100%	41%	0
Sat 9a	Mostly cloudy	47°8° (likely 44°7° to 51°11°)	47°8°	0%	3 mph5 km/h from N, gusts 8 mph12 km/h	79%	50%	0
Sat 10a	Mostly sunny	53°12° (likely 48°9° to 53°12°)	53°12°	0%	3 mph5 km/h from N, gusts 9 mph15 km/h	61%	36%	1
Sat 11a	Cloudy	58°14° (likely 50°10° to 58°14°)	58°14°	0%	3 mph5 km/h from N, gusts 9 mph14 km/h	49%	59%	2
Sat 12p	Cloudy	59°15° (likely 52°11° to 59°15°)	59°15°	0%	5 mph8 km/h from N, gusts 9 mph15 km/h	47%	57%	3
Sat 1p	Cloudy	57°14° (likely 54°12° to 57°14°)	57°14°	0%	5 mph8 km/h from NW, gusts 10 mph17 km/h	49%	60%	3
Sat 2p	Cloudy	59°15° (likely 55°13° to 59°15°)	59°15°	0%	6 mph10 km/h from W, gusts 11 mph17 km/h	45%	60%	2
Sat 3p	Cloudy	60°16° (likely 55°13° to 60°16°)	60°16°	0%	6 mph10 km/h from W, gusts 10 mph16 km/h	42%	65%	2
Sat 4p	Cloudy	60°16° (likely 56°13° to 60°16°)	60°16°	0%	6 mph10 km/h from W, gusts 10 mph16 km/h	44%	67%	1
Sat 5p	Cloudy	60°16° (likely 55°13° to 60°16°)	60°16°	0%	5 mph8 km/h from W, gusts 9 mph14 km/h	44%	67%	0
Sat 6p	Partly cloudy	56°13° (likely 51°11° to 57°14°)	56°13°	0%	3 mph5 km/h from W, gusts 8 mph14 km/h	53%	56%	0
Sat 7p	Mostly clear	52°11° (likely 51°11° to 56°13°)	52°11°	0%	3 mph5 km/h from W, gusts 7 mph11 km/h	63%	42%	0
Sat 8p	Mostly clear	50°10° (likely 50°10° to 56°13°)	50°10°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	74%	19%	0
Sat 9p	Clear	48°9° (likely 48°9° to 55°13°)	48°9°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	80%	0%	0
Sat 10p	Clear	46°8° (likely 46°8° to 54°12°)	46°8°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	86%	0%	0
Sat 11p	Clear	46°8° (likely 46°8° to 54°12°)	46°8°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	89%	0%	0
Sun 12a	Clear	45°7° (likely 45°7° to 53°12°)	45°7°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	93%	0%	0
Sun 1a	Clear	44°7° (likely 44°7° to 52°11°)	44°7°	0%	2 mph3 km/h from NW, gusts 7 mph11 km/h	96%	0%	0
Sun 2a	Clear	44°7° (likely 44°7° to 53°12°)	44°7°	0%	2 mph3 km/h from NW, gusts 7 mph12 km/h	96%	0%	0
Sun 3a	Clear	42°6° (likely 42°6° to 52°11°)	42°6°	0%	2 mph3 km/h from NW, gusts 7 mph12 km/h	100%	0%	0
Sun 4a	Clear	42°6° (likely 42°6° to 51°11°)	42°6°	0%	2 mph3 km/h from NW, gusts 7 mph12 km/h	100%	0%	0
Sun 5a	Clear	42°6° (likely 42°6° to 51°11°)	42°6°	0%	3 mph5 km/h from N, gusts 7 mph11 km/h	100%	0%	0
Sun 6a	Clear	42°6° (likely 42°6° to 50°10°)	42°6°	0%	2 mph3 km/h from N, gusts 6 mph9 km/h	86%	0%	0
Sun 7a	Sunny	42°6° (likely 42°6° to 50°10°)	42°6°	0%	2 mph3 km/h from N, gusts 5 mph8 km/h	79%	0%	0
Sun 8a	Sunny	48°9° (likely 46°8° to 50°10°)	48°9°	0%	3 mph5 km/h from N, gusts 5 mph8 km/h	71%	0%	0
Sun 9a	Sunny	50°10° (likely 47°8° to 52°11°)	50°10°	0%	3 mph5 km/h from NW, gusts 5 mph8 km/h	68%	0%	1
Sun 10a	Sunny	53°12° (likely 52°11° to 56°13°)	53°12°	0%	3 mph5 km/h from N, gusts 5 mph9 km/h	64%	0%	2
Sun 11a	Sunny	54°12° (likely 53°12° to 58°14°)	54°12°	0%	3 mph5 km/h from NW, gusts 6 mph9 km/h	61%	0%	3
Sun 12p	Sunny	56°13° (likely 55°13° to 60°16°)	56°13°	0%	3 mph5 km/h from NW, gusts 6 mph10 km/h	57%	0%	4
Sun 1p	Sunny	57°14° (likely 56°13° to 61°16°)	57°14°	0%	3 mph5 km/h from NW, gusts 6 mph10 km/h	53%	0%	4
Sun 2p	Sunny	59°15° (likely 58°14° to 62°17°)	59°15°	0%	3 mph5 km/h from W, gusts 6 mph10 km/h	49%	0%	4
Sun 3p	Sunny	59°15° (likely 59°15° to 63°17°)	59°15°	0%	3 mph5 km/h from W, gusts 6 mph10 km/h	49%	0%	3
Sun 4p	Sunny	59°15° (likely 59°15° to 62°17°)	59°15°	0%	3 mph5 km/h from W, gusts 6 mph9 km/h	49%	0%	2
Sun 5p	Sunny	60°16° (likely 59°15° to 61°16°)	60°16°	0%	2 mph3 km/h from SW, gusts 6 mph9 km/h	49%	0%	1
Sun 6p	Clear	57°14° (likely 54°12° to 57°14°)	57°14°	0%	3 mph5 km/h from SW, gusts 8 mph13 km/h	55%	0%	0
Sun 7p	Clear	55°13° (likely 51°11° to 55°13°)	55°13°	0%	3 mph5 km/h from SW, gusts 10 mph16 km/h	61%	0%	0
Sun 8p	Clear	54°12° (likely 49°9° to 54°12°)	54°12°	0%	3 mph5 km/h from SW, gusts 10 mph16 km/h	66%	0%	0
Sun 9p	Clear	51°11° (likely 48°9° to 52°11°)	51°11°	0%	3 mph5 km/h from SW, gusts 11 mph17 km/h	66%	0%	0
Sun 10p	Clear	50°10° (likely 47°8° to 52°11°)	50°10°	0%	3 mph5 km/h from SW, gusts 11 mph17 km/h	66%	0%	0
Sun 11p	Clear	51°11° (likely 46°8° to 52°11°)	51°11°	0%	3 mph5 km/h from SW, gusts 10 mph17 km/h	63%	0%	0
Mon 12a	Clear	51°11° (likely 45°7° to 51°11°)	51°11°	0%	3 mph5 km/h from W, gusts 10 mph16 km/h	61%	0%	0
Mon 1a	Clear	50°10° (likely 46°8° to 51°11°)	48°9°	0%	5 mph8 km/h from W, gusts 10 mph17 km/h	66%	0%	0
Mon 2a	Clear	50°10° (likely 47°8° to 52°11°)	48°9°	0%	5 mph8 km/h from W, gusts 12 mph19 km/h	63%	0%	0
Mon 3a	Clear	50°10° (likely 47°8° to 52°11°)	48°9°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	63%	0%	0
Mon 4a	Clear	49°9° (likely 46°8° to 52°11°)	47°8°	0%	6 mph10 km/h from W, gusts 9 mph15 km/h	66%	0%	0
Mon 5a	Clear	49°9° (likely 46°8° to 51°11°)	47°8°	0%	6 mph10 km/h from W, gusts 10 mph15 km/h	66%	0%	0
Mon 6a	Clear	49°9° (likely 46°8° to 51°11°)	47°8°	0%	6 mph10 km/h from W, gusts 10 mph16 km/h	66%	1%	0
Mon 7a	Sunny	49°9° (likely 46°8° to 51°11°)	47°8°	0%	6 mph10 km/h from W, gusts 11 mph18 km/h	68%	2%	0

Days ahead

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

Today, Oct 24. Cloudy. High 60°16°, low 42°6°. Typical 61°16° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°6°
  Dry
Official NWS forecast
Today: Patchy frost before 9am. Partly sunny, with a high near 60. Northwest wind around 6 mph.
Tonight: Mostly clear, with a low around 42. Northwest wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–60°16°
Low, likely
39°4°–49°9°
Typical high / low
61°16° / 40°4°
Wind
9 mph15 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 61°16°, low 38°3°. Typical 60°16° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Official NWS forecast
Day: Sunny, with a high near 61. Northwest wind around 3 mph.
Night: Clear. Low around 38, with temperatures rising to around 49 overnight. Southwest wind around 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–63°17°
Low, likely
38°3°–49°9°
Typical high / low
60°16° / 39°4°
Wind
8 mph13 km/h, gusts 15 mph24 km/h
UV peak
4
Monday, Oct 26. Sunny. High 64°18°, low 45°7°. Typical 60°16° / 39°4°. 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, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 64. West wind around 8 mph.
Night: Clear. Low around 45, with temperatures rising to around 49 overnight.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–64°18°
Low, likely
45°7°–51°11°
Typical high / low
60°16° / 39°4°
Wind
11 mph18 km/h, gusts 18 mph29 km/h
UV peak
4
Tuesday, Oct 27. Sunny. High 55°13°, low 41°5°. Typical 60°16° / 39°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 55°13°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 55.
Night: Mostly clear, with a low around 41.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
55°13°–59°15°
Low, likely
41°5°–51°11°
Typical high / low
60°16° / 39°4°
Wind
18 mph29 km/h, gusts 26 mph42 km/h
UV peak
4
Wednesday, Oct 28. Mostly sunny. High 55°13°, low 47°8°. Typical 59°15° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 55°13°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 55.
Night: Partly cloudy, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
52°11°–57°14°
Low, likely
45°7°–48°9°
Typical high / low
59°15° / 38°3°
Wind
14 mph22 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 62°17°, low 52°11°. Typical 59°15° / 38°3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 62.
Night: Partly cloudy, with a low around 52.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–62°17°
Low, likely
48°9°–52°11°
Typical high / low
59°15° / 38°3°
Wind
14 mph23 km/h, gusts 22 mph35 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 64°18°, low 48°9°. Typical 59°15° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 64.
Night: Partly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
48°9°–56°13°
Typical high / low
59°15° / 38°3°
Wind
12 mph19 km/h, gusts 26 mph42 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 61°16°, low 53°12°. Typical 58°14° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
58°14°–66°19°
Low, likely
46°8°–56°13°
Typical high / low
58°14° / 38°3°
Wind
17 mph27 km/h, gusts 27 mph44 km/h
UV peak
4
Sunday, Nov 1. Partly sunny. High 61°16°, low 54°12°. Typical 58°14° / 37°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  30% chance
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
55°13°–64°18°
Low, likely
46°8°–58°14°
Typical high / low
58°14° / 37°3°
Wind
14 mph23 km/h, gusts 25 mph40 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 60°16°, low 56°13°. Typical 58°14° / 37°3°. Rain 0.04 in1 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 58°15°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 61°16°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  30% chance
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
54°12°–64°18°
Low, likely
48°9°–60°16°
Typical high / low
58°14° / 37°3°
Wind
14 mph23 km/h, gusts 21 mph34 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 60°, low 42°.
Tomorrow
Dry, high 61°, low 38°.
Monday
Dry, high 64°, low 45°, warming up.
Rest of week
Mostly dry, highs 55–64°.

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

Shelter Island Sound at Shelter Island (IN MLLW)

7.7 mi

Level: 2.0 ft

Reading from Sat 6 AM · NWS gauge page

Orient Harbor at Orient (IN MLLW)

11 mi

Below flood stage

Level: 2.7 ft

Reading from Sat 5:54 AM · NWS gauge page

Peconic River at Riverhead (IN MLLW)

12 mi

Below flood stage

Level: 1.7 ft

Reading from Sat 5:54 AM · NWS gauge page

Shinnecock Bay at Ponquogue (IN MLLW)

13 mi

Below flood stage

Level: 4.4 ft

Reading from Sat 5:48 AM · NWS gauge page

For your home

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

Heating this week

About 76% less heating than a typical week.

This week 26Typical 111

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 11
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 4 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 30°F). Indoor air will run dry too — a humidifier keeping indoor relative humidity in the 30–50% range is more comfortable and cuts static shocks, without going so high it fogs cold windows.

Open the windows?

Today, 3:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Westhampton Gabreski Airport · official normals 1991–2020 · records 1951–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 44 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 31 min less
Golden hour: 5:17–6:13 PM; Morning 6:54–7:49 AM
Blue hour: 6:13–6:24 PM; Morning 6:43–6:54 AM; first light 6:43 AM

Stars tonight? Fair

Clear 8 PM–6:44 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:21 AM · rises 4:52 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Peconic. The highest point on the skyline is about 9,600 ft, 78 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Frost Advisory

Peconic, NY weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Shelter Island Sound at Shelter Island (IN MLLW)

Orient Harbor at Orient (IN MLLW)

Peconic River at Riverhead (IN MLLW)

Shinnecock Bay at Ponquogue (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