Frost Advisory
Starts in 9 h 19 min
When
From midnight tonight to 9 AM EDT Sunday.
Where
In Connecticut, Southern Fairfield, Southern Middlesex, Southern New Haven, and Southern New London Counties. In New York, Northeast Suffolk and Southeast Suffolk Counties.
Issued for this forecast zone · National Weather Service Upton NY
What, impacts and precautionsHide details
What
Temperatures as low as 35 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: Southern Fairfield; Southern New Haven; Southern Middlesex; Southern New London; Northeast Suffolk; Southeast Suffolk
See it on weather.gov (opens in a new tab)

Observed 2:10 PM EDT at KFOK

Mattituck, NY weather

Sunny and 59°15°, jacket by 6 PM.

Forecasts agree

Now 59°15°

Sunny

Wind: 10 mph17 km/h; From the north-northwest. Up to 10 mph17 km/h through 2 AM
Dew point: 38°3°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Air today: 39Good; EPA forecast · PM2.5 (fine particles)
Pressure: 30.54 inHg1034 hPa; Falling slowly · −0.04 inHg−1.3 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 59°15° today at 4 PM
Below 50°10° tonight after 8 PM
Low 36°2° tonight at 5 AM
Above 50°10° tomorrow by 11 AM

This afternoonNear 58°14° · Mostly cloudy
TonightDown to 36°2° by 5 AM · Clear
Tomorrow morningUp to 50°10° by 11 AM · Clear
Tomorrow afternoonUp to 61°16° by 5 PM · Clear
Tomorrow nightDown to 42°6° by 5 AM · Clear
Monday morningUp to 54°12° by 11 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 2p	Partly sunny	57°14° (likely 54°12° to 57°14°)	57°14°	0%	6 mph10 km/h from NW, gusts 11 mph17 km/h	49%	65%	2
Sat 3p	Partly sunny	57°14° (likely 55°13° to 57°14°)	57°14°	0%	6 mph10 km/h from NW, gusts 12 mph19 km/h	49%	61%	2
Sat 4p	Partly sunny	59°15° (likely 56°13° to 59°15°)	59°15°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	45%	72%	1
Sat 5p	Partly sunny	58°14° (likely 56°13° to 58°14°)	58°14°	0%	5 mph8 km/h from W, gusts 8 mph13 km/h	47%	55%	0
Sat 6p	Cloudy	55°13° (likely 51°11° to 56°13°)	55°13°	0%	3 mph5 km/h from W, gusts 7 mph11 km/h	53%	72%	0
Sat 7p	Mostly clear	52°11° (likely 49°9° to 55°13°)	52°11°	0%	3 mph5 km/h from W, gusts 7 mph11 km/h	61%	43%	0
Sat 8p	Clear	48°9° (likely 48°9° to 55°13°)	48°9°	0%	2 mph3 km/h from W, gusts 8 mph13 km/h	71%	13%	0
Sat 9p	Clear	46°8° (likely 46°8° to 54°12°)	46°8°	0%	2 mph3 km/h from W, gusts 8 mph12 km/h	76%	5%	0
Sat 10p	Mostly clear	44°7° (likely 44°7° to 53°12°)	44°7°	0%	2 mph3 km/h from NW, gusts 7 mph12 km/h	82%	10%	0
Sat 11p	Clear	43°6° (likely 43°6° to 52°11°)	43°6°	0%	2 mph3 km/h from NW, gusts 7 mph12 km/h	86%	14%	0
Sun 12a	Clear	43°6° (likely 43°6° to 52°11°)	43°6°	0%	2 mph3 km/h from NW, gusts 7 mph12 km/h	82%	17%	0
Sun 1a	Clear	42°6° (likely 42°6° to 51°11°)	42°6°	0%	2 mph3 km/h from NW, gusts 7 mph11 km/h	86%	19%	0
Sun 2a	Clear	40°4° (likely 40°4° to 51°11°)	40°4°	0%	2 mph3 km/h from NW, gusts 6 mph10 km/h	92%	20%	0
Sun 3a	Clear	39°4° (likely 39°4° to 50°10°)	39°4°	0%	2 mph3 km/h from NW, gusts 7 mph11 km/h	92%	16%	0
Sun 4a	Clear	38°3° (likely 38°3° to 50°10°)	38°3°	0%	2 mph3 km/h from NW, gusts 7 mph11 km/h	92%	10%	0
Sun 5a	Clear	36°2° (likely 36°2° to 50°10°)	36°2°	0%	2 mph3 km/h from NW, gusts 6 mph10 km/h	100%	5%	0
Sun 6a	Clear	37°3° (likely 37°3° to 50°10°)	37°3°	0%	2 mph3 km/h from N, gusts 6 mph9 km/h	100%	5%	0
Sun 7a	Sunny	38°3° (likely 38°3° to 49°9°)	36°2°	0%	3 mph5 km/h from N, gusts 6 mph9 km/h	100%	5%	0
Sun 8a	Sunny	41°5° (likely 41°5° to 50°10°)	39°4°	0%	3 mph5 km/h from N, gusts 6 mph10 km/h	93%	5%	0
Sun 9a	Sunny	46°8° (likely 46°8° to 55°13°)	45°7°	0%	3 mph5 km/h from N, gusts 5 mph9 km/h	76%	4%	1
Sun 10a	Sunny	48°9° (likely 48°9° to 57°14°)	47°8°	0%	3 mph5 km/h from N, gusts 6 mph10 km/h	74%	2%	2
Sun 11a	Sunny	50°10° (likely 50°10° to 58°14°)	49°9°	0%	3 mph5 km/h from N, gusts 8 mph12 km/h	68%	0%	3
Sun 12p	Sunny	53°12° (likely 53°12° to 60°16°)	53°12°	0%	3 mph5 km/h from NW, gusts 8 mph13 km/h	61%	0%	4
Sun 1p	Sunny	56°13° (likely 56°13° to 61°16°)	56°13°	0%	3 mph5 km/h from NW, gusts 8 mph13 km/h	55%	0%	4
Sun 2p	Sunny	58°14° (likely 57°14° to 62°17°)	58°14°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	51%	0%	4
Sun 3p	Sunny	59°15° (likely 58°14° to 62°17°)	59°15°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	49%	0%	3
Sun 4p	Sunny	60°16° (likely 59°15° to 62°17°)	60°16°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	47%	0%	2
Sun 5p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	2 mph3 km/h from SW, gusts 7 mph11 km/h	48%	0%	1
Sun 6p	Clear	57°14° (likely 55°13° to 57°14°)	57°14°	0%	2 mph3 km/h from SW, gusts 6 mph10 km/h	57%	0%	0
Sun 7p	Clear	54°12° (likely 50°10° to 55°13°)	54°12°	0%	3 mph5 km/h from SW, gusts 10 mph16 km/h	66%	0%	0
Sun 8p	Clear	50°10° (likely 48°9° to 54°12°)	49°9°	0%	3 mph5 km/h from SW, gusts 11 mph18 km/h	80%	0%	0
Sun 9p	Clear	47°8° (likely 47°8° to 54°12°)	46°8°	0%	3 mph5 km/h from SW, gusts 12 mph19 km/h	89%	0%	0
Sun 10p	Clear	46°8° (likely 46°8° to 53°12°)	45°7°	0%	3 mph5 km/h from SW, gusts 13 mph21 km/h	93%	0%	0
Sun 11p	Clear	46°8° (likely 45°7° to 53°12°)	45°7°	0%	3 mph5 km/h from SW, gusts 13 mph21 km/h	93%	0%	0
Mon 12a	Clear	45°7° (likely 45°7° to 53°12°)	44°7°	0%	3 mph5 km/h from W, gusts 13 mph21 km/h	96%	0%	0
Mon 1a	Clear	45°7° (likely 44°7° to 53°12°)	43°6°	0%	5 mph8 km/h from W, gusts 14 mph23 km/h	96%	0%	0
Mon 2a	Clear	44°7° (likely 44°7° to 53°12°)	41°5°	0%	5 mph8 km/h from W, gusts 14 mph22 km/h	100%	0%	0
Mon 3a	Clear	43°6° (likely 43°6° to 51°11°)	40°4°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	100%	0%	0
Mon 4a	Clear	43°6° (likely 43°6° to 52°11°)	39°4°	0%	6 mph10 km/h from W, gusts 14 mph23 km/h	100%	0%	0
Mon 5a	Clear	42°6° (likely 42°6° to 52°11°)	38°3°	0%	6 mph10 km/h from W, gusts 14 mph22 km/h	100%	0%	0
Mon 6a	Clear	41°5° (likely 41°5° to 52°11°)	37°3°	0%	6 mph10 km/h from W, gusts 13 mph21 km/h	100%	1%	0
Mon 7a	Sunny	41°5° (likely 41°5° to 53°12°)	36°2°	0%	7 mph11 km/h from W, gusts 14 mph22 km/h	100%	1%	0
Mon 8a	Sunny	44°7° (likely 44°7° to 54°12°)	40°4°	0%	7 mph11 km/h from W, gusts 12 mph20 km/h	100%	9%	0
Mon 9a	Sunny	48°9° (likely 48°9° to 55°13°)	45°7°	0%	7 mph11 km/h from W, gusts 13 mph20 km/h	89%	17%	1
Mon 10a	Sunny	51°11° (likely 51°11° to 56°13°)	51°11°	0%	8 mph13 km/h from W, gusts 14 mph23 km/h	80%	12%	2
Mon 11a	Sunny	54°12° (likely 54°12° to 59°15°)	54°12°	0%	8 mph13 km/h from W, gusts 13 mph21 km/h	74%	8%	3
Mon 12p	Sunny	57°14° (likely 56°13° to 62°17°)	57°14°	0%	8 mph13 km/h from W, gusts 14 mph22 km/h	69%	1%	4
Mon 1p	Sunny	60°16° (likely 57°14° to 64°18°)	60°16°	0%	9 mph14 km/h from W, gusts 13 mph21 km/h	62%	2%	4

Days ahead

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

Today, Oct 24. Cloudy. High 59°15°, low 36°2°. Typical 61°16° / 40°4°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Partly sunny, 59°15°
  Dry
2. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 36°2°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 59. West wind around 6 mph.
Tonight: Areas of frost after 4am. Mostly clear, with a low around 36. Northwest wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
56°13°–59°15°
Low, likely
36°2°–47°8°
Typical high / low
61°16° / 40°4°
Wind
10 mph16 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 61°16°, low 40°4°. Typical 60°16° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°6°
  Dry
Official NWS forecast
Day: Patchy frost before 8am. Sunny, with a high near 61. Northwest wind around 3 mph.
Night: Clear. Low around 40, with temperatures rising to around 42 overnight. Southwest wind 2 to 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–63°17°
Low, likely
40°4°–49°9°
Typical high / low
60°16° / 39°4°
Wind
9 mph15 km/h, gusts 19 mph31 km/h
UV peak
4
Monday, Oct 26. Sunny. High 64°18°, low 47°8°. Typical 60°16° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Official NWS forecast
Day: Sunny, with a high near 64. West wind 6 to 9 mph.
Night: Clear. Low around 47, with temperatures rising to around 50 overnight.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–64°18°
Low, likely
43°6°–51°11°
Typical high / low
60°16° / 39°4°
Wind
16 mph25 km/h
UV peak
4
Tuesday, Oct 27. Sunny. High 57°14°, low 42°6°. Typical 60°16° / 39°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 54°12°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 57.
Night: Mostly clear, with a low around 42.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
57°14°–59°15°
Low, likely
42°6°–52°11°
Typical high / low
60°16° / 39°4°
Wind
20 mph33 km/h
UV peak
4
Wednesday, Oct 28. Mostly sunny. High 56°13°, low 46°8°. Typical 59°15° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 54°12°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 51°10°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 56.
Night: Partly cloudy, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
52°11°–57°14°
Low, likely
40°4°–49°9°
Typical high / low
59°15° / 38°3°
Wind
15 mph25 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 64°18°, low 52°11°. Typical 59°15° / 38°3°. Dry. Mostly 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, 56°13°
  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 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–64°18°
Low, likely
48°9°–53°12°
Typical high / low
59°15° / 38°3°
Wind
14 mph23 km/h, gusts 22 mph35 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 66°19°, low 50°10°. Typical 59°15° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 66.
Night: Mostly clear, with a low around 50.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–67°19°
Low, likely
50°10°–57°14°
Typical high / low
59°15° / 38°3°
Wind
15 mph24 km/h, gusts 26 mph42 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 61°16°, low 55°13°. Typical 58°14° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 57°14°
  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
58°14°–64°18°
Low, likely
54°12°–56°13°
Typical high / low
58°14° / 38°3°
Wind
18 mph29 km/h, gusts 27 mph44 km/h
UV peak
4
Sunday, Nov 1. Drizzle. High 63°17°, low 57°14°. Typical 58°14° / 37°3°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 60°16°
  30% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Drizzle, 61°16°
  40% 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
58°14°–67°19°
Low, likely
54°12°–59°15°
Typical high / low
58°14° / 37°3°
Wind
16 mph26 km/h, gusts 25 mph40 km/h
UV peak
2
Monday, Nov 2. Drizzle. High 64°18°, low 60°16°. Typical 58°14° / 37°3°. Rain 0.33 in8.4 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 62°17°
  40% chance · 0.07 in1.7 mm
2. Afternoon
  noon–6 PM
  Drizzle, 65°18°
  20% chance · 0.11 in2.9 mm
3. Evening
  6 PM–midnight
  Drizzle, 63°17°
  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
63°17°–68°20°
Low, likely
58°14°–64°18°
Typical high / low
58°14° / 37°3°
Wind
24 mph38 km/h, gusts 36 mph58 km/h

10 days15 days30 days

The outlook

Today
Dry, high 59°, low 36°.
Tomorrow
Dry, high 61°, low 40°.
Monday
Dry, high 64°, low 47°, warming up.
Rest of week
Mostly dry, highs 56–66°.

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

Peconic River at Riverhead (IN MLLW)

7.9 mi

Below flood stage

Level: 3.1 ft

Reading from Sat 1:54 PM · NWS gauge page

Shinnecock Bay at Ponquogue (IN MLLW)

11 mi

Below flood stage

Level: 1.2 ft

Reading from Sat 1:48 PM · NWS gauge page

Shelter Island Sound at Shelter Island (IN MLLW)

12 mi

Level: 2.5 ft

Reading from Sat 1 PM · NWS gauge page

Orient Harbor at Orient (IN MLLW)

15 mi

Below flood stage

Level: 1.5 ft

Reading from Sat 1:54 PM · NWS gauge page

For your home

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

Heating this week

About 70% less heating than a typical week.

This week 33Typical 111

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 25
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 11 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 38°F).

Open the windows?

Sun, 4:00 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 2°1° colder than typical.

Last 7 days vs normal

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

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

Sun & moon

Sun

Daylight: 10 h 44 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 31 min less
Golden hour: 5:18–6:13 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

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

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:22 AM · rises 4:53 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Mattituck. The highest point on the skyline is about 700 ft, 18 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

Mattituck, NY weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Peconic River at Riverhead (IN MLLW)

Shinnecock Bay at Ponquogue (IN MLLW)

Shelter Island Sound at Shelter Island (IN MLLW)

Orient Harbor at Orient (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