Frost Advisory
Starts in 9 h 45 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 12:54 PM EDT at KMTP

Northwest Harbor, NY weather

Sunny and 55°13°, jacket by 5 PM.

Mostly agree

Now 55°13°

Sunny

Wind: 5 mph8 km/h; Up to 5 mph8 km/h through 2 AM
Dew point: 39°4°; Comfortable
UV index: 3Moderate; Moderate until 3 PM · peak 4
Air today: 39Good; EPA forecast · PM2.5 (fine particles)
Pressure: 30.54 inHg1034 hPa; Falling slowly · −0.03 inHg−1.1 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (56°13° then, 55°13° now)

Good hours for

Below 50°10° tonight after 7 PM
Low 41°5° tomorrow at 7 AM
Above 50°10° tomorrow by 9 AM

This afternoonNear 56°13° · Partly cloudy
TonightDown to 42°6° by 5 AM · Clear
Tomorrow morningUp to 55°13° by 11 AM · Clear
Tomorrow afternoonNear 57°14° · Clear
Tomorrow nightDown to 49°9° by 4 AM · Clear
Monday morningUp to 57°14° 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	Sunny	56°13° (likely 55°13° to 58°14°)	56°13°	0%	5 mph8 km/h from W, gusts 10 mph15 km/h	49%	27%	3
Sat 3p	Sunny	57°14° (likely 55°13° to 59°15°)	57°14°	0%	5 mph8 km/h from W, gusts 10 mph17 km/h	45%	23%	2
Sat 4p	Mostly sunny	56°13° (likely 55°13° to 59°15°)	56°13°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	47%	38%	1
Sat 5p	Cloudy	55°13° (likely 55°13° to 57°14°)	55°13°	0%	5 mph8 km/h from W, gusts 8 mph13 km/h	49%	70%	0
Sat 6p	Cloudy	52°11° (likely 51°11° to 54°12°)	52°11°	0%	2 mph3 km/h from W, gusts 8 mph13 km/h	59%	72%	0
Sat 7p	Mostly clear	49°9° (likely 49°9° to 54°12°)	49°9°	0%	1 mph2 km/h from W, gusts 7 mph12 km/h	68%	39%	0
Sat 8p	Clear	48°9° (likely 48°9° to 53°12°)	48°9°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	71%	11%	0
Sat 9p	Clear	46°8° (likely 46°8° to 53°12°)	46°8°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	79%	0%	0
Sat 10p	Clear	46°8° (likely 46°8° to 52°11°)	46°8°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	79%	0%	0
Sat 11p	Clear	45°7° (likely 45°7° to 52°11°)	45°7°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	86%	1%	0
Sun 12a	Clear	45°7° (likely 45°7° to 51°11°)	45°7°	0%	1 mph2 km/h from W, gusts 5 mph9 km/h	86%	5%	0
Sun 1a	Clear	45°7° (likely 45°7° to 50°10°)	45°7°	0%	1 mph2 km/h from NW, gusts 5 mph7 km/h	86%	11%	0
Sun 2a	Clear	44°7° (likely 44°7° to 50°10°)	44°7°	0%	1 mph2 km/h from NW, gusts 5 mph8 km/h	89%	16%	0
Sun 3a	Clear	43°6° (likely 43°6° to 49°9°)	43°6°	0%	1 mph2 km/h from NW, gusts 4 mph7 km/h	96%	18%	0
Sun 4a	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	2 mph3 km/h from NW, gusts 4 mph7 km/h	93%	20%	0
Sun 5a	Clear	42°6° (likely 42°6° to 48°9°)	42°6°	0%	2 mph3 km/h from NW, gusts 4 mph7 km/h	96%	20%	0
Sun 6a	Clear	42°6° (likely 42°6° to 48°9°)	42°6°	0%	2 mph3 km/h from N, gusts 4 mph7 km/h	86%	17%	0
Sun 7a	Sunny	41°5° (likely 41°5° to 47°8°)	41°5°	0%	2 mph3 km/h from N, gusts 6 mph10 km/h	82%	13%	0
Sun 8a	Sunny	47°8° (likely 46°8° to 48°9°)	47°8°	0%	2 mph3 km/h from N, gusts 5 mph9 km/h	74%	9%	0
Sun 9a	Sunny	50°10° (likely 47°8° to 51°11°)	50°10°	0%	2 mph3 km/h from NW, gusts 5 mph8 km/h	71%	6%	1
Sun 10a	Sunny	53°12° (likely 51°11° to 55°13°)	53°12°	0%	3 mph5 km/h from N, gusts 6 mph10 km/h	64%	3%	2
Sun 11a	Sunny	55°13° (likely 54°12° to 58°14°)	55°13°	0%	3 mph5 km/h from NW, gusts 6 mph9 km/h	59%	2%	3
Sun 12p	Sunny	56°13° (likely 55°13° to 60°16°)	56°13°	0%	3 mph5 km/h from NW, gusts 7 mph11 km/h	55%	1%	4
Sun 1p	Sunny	58°14° (likely 57°14° to 61°16°)	58°14°	0%	3 mph5 km/h from W, gusts 6 mph9 km/h	49%	1%	4
Sun 2p	Sunny	58°14° (likely 58°14° to 63°17°)	58°14°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	49%	0%	4
Sun 3p	Sunny	58°14° (likely 58°14° to 63°17°)	58°14°	0%	3 mph5 km/h from W, gusts 7 mph12 km/h	49%	0%	3
Sun 4p	Sunny	59°15° (likely 58°14° to 62°17°)	59°15°	0%	3 mph5 km/h from SW, gusts 8 mph12 km/h	49%	0%	2
Sun 5p	Sunny	58°14° (likely 57°14° to 60°16°)	58°14°	0%	3 mph5 km/h from SW, gusts 7 mph11 km/h	51%	0%	1
Sun 6p	Clear	55°13° (likely 52°11° to 56°13°)	55°13°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	59%	0%	0
Sun 7p	Clear	54°12° (likely 49°9° to 54°12°)	54°12°	0%	2 mph3 km/h from SW, gusts 9 mph15 km/h	64%	0%	0
Sun 8p	Clear	51°11° (likely 48°9° to 53°12°)	51°11°	0%	2 mph3 km/h from SW, gusts 10 mph16 km/h	71%	0%	0
Sun 9p	Clear	51°11° (likely 47°8° to 53°12°)	51°11°	0%	2 mph3 km/h from SW, gusts 11 mph18 km/h	66%	0%	0
Sun 10p	Clear	51°11° (likely 46°8° to 53°12°)	51°11°	0%	2 mph3 km/h from SW, gusts 12 mph20 km/h	63%	0%	0
Sun 11p	Clear	50°10° (likely 47°8° to 53°12°)	50°10°	0%	2 mph3 km/h from SW, gusts 12 mph20 km/h	66%	0%	0
Mon 12a	Clear	50°10° (likely 47°8° to 53°12°)	50°10°	0%	2 mph3 km/h from W, gusts 10 mph17 km/h	63%	0%	0
Mon 1a	Clear	50°10° (likely 47°8° to 53°12°)	50°10°	0%	3 mph5 km/h from W, gusts 13 mph22 km/h	61%	0%	0
Mon 2a	Clear	50°10° (likely 48°9° to 53°12°)	50°10°	0%	3 mph5 km/h from W, gusts 13 mph22 km/h	61%	0%	0
Mon 3a	Clear	50°10° (likely 47°8° to 50°10°)	50°10°	0%	3 mph5 km/h from W, gusts 12 mph20 km/h	61%	0%	0
Mon 4a	Clear	49°9° (likely 47°8° to 50°10°)	47°8°	0%	5 mph8 km/h from W, gusts 14 mph22 km/h	63%	0%	0
Mon 5a	Clear	49°9° (likely 46°8° to 50°10°)	47°8°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	66%	1%	0
Mon 6a	Clear	49°9° (likely 46°8° to 50°10°)	47°8°	0%	5 mph8 km/h from W, gusts 13 mph20 km/h	66%	3%	0
Mon 7a	Sunny	49°9° (likely 47°8° to 50°10°)	47°8°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	68%	2%	0
Mon 8a	Sunny	50°10° (likely 49°9° to 51°11°)	48°9°	0%	5 mph8 km/h from W, gusts 12 mph20 km/h	71%	12%	0
Mon 9a	Sunny	52°11° (likely 52°11° to 55°13°)	52°11°	0%	6 mph10 km/h from W, gusts 14 mph23 km/h	71%	11%	1
Mon 10a	Sunny	54°12° (likely 54°12° to 58°14°)	54°12°	0%	6 mph10 km/h from W, gusts 14 mph23 km/h	69%	7%	2
Mon 11a	Sunny	57°14° (likely 55°13° to 60°16°)	57°14°	0%	7 mph11 km/h from W, gusts 14 mph22 km/h	64%	8%	3
Mon 12p	Sunny	59°15° (likely 57°14° to 61°16°)	59°15°	0%	7 mph11 km/h from W, gusts 14 mph22 km/h	60%	8%	4
Mon 1p	Sunny	60°16° (likely 58°14° to 63°17°)	60°16°	0%	7 mph11 km/h from W, gusts 14 mph22 km/h	55%	2%	4

Days ahead

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

Today, Oct 24. Partly sunny. High 59°15°, low 38°3°. Typical 60°16° / 42°6°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Mostly sunny, 57°14°
  Dry
2. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 42°6°
  Dry
Official NWS forecast
Today: Mostly sunny. High near 59, with temperatures falling to around 55 in the afternoon. West wind around 5 mph.
Tonight: Mostly clear. Low around 38, with temperatures rising to around 42 overnight. West wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
55°13°–59°15°
Low, likely
38°3°–46°8°
Typical high / low
60°16° / 42°6°
Wind
7 mph11 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 60°16°, low 40°4°. Typical 60°16° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Official NWS forecast
Day: Sunny. High near 60, with temperatures falling to around 58 in the afternoon. Northwest wind around 3 mph.
Night: Clear. Low around 40, with temperatures rising to around 49 overnight. Southwest wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–63°17°
Low, likely
40°4°–47°8°
Typical high / low
60°16° / 42°6°
Wind
8 mph12 km/h, gusts 18 mph29 km/h
UV peak
4
Monday, Oct 26. Sunny. High 63°17°, low 46°8°. Typical 59°15° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  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, 53°12°
  Dry
Official NWS forecast
Day: Sunny. High near 63, with temperatures falling to around 61 in the afternoon. West wind around 7 mph.
Night: Clear. Low around 46, with temperatures rising to around 49 overnight.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
46°8°–51°11°
Typical high / low
59°15° / 42°6°
Wind
11 mph18 km/h, gusts 20 mph33 km/h
UV peak
4
Tuesday, Oct 27. Sunny. High 54°12°, low 42°6°. Typical 59°15° / 41°5°. 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, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 54.
Night: Mostly clear, with a low around 42.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
54°12°–59°15°
Low, likely
42°6°–51°11°
Typical high / low
59°15° / 41°5°
Wind
15 mph24 km/h, gusts 24 mph38 km/h
UV peak
4
Wednesday, Oct 28. Mostly sunny. High 55°13°, low 47°8°. Typical 58°14° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 54°12°
  Dry
3. Evening
  6 PM–midnight
  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 55.
Night: Partly cloudy, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
52°11°–56°13°
Low, likely
45°7°–50°10°
Typical high / low
58°14° / 41°5°
Wind
11 mph17 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 61°16°, low 53°12°. Typical 58°14° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 60°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 61.
Night: Partly cloudy, with a low around 53.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–62°17°
Low, likely
49°9°–55°13°
Typical high / low
58°14° / 41°5°
Wind
16 mph26 km/h, gusts 22 mph35 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 63°17°, low 49°9°. Typical 58°14° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  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 63.
Night: Partly cloudy, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–67°19°
Low, likely
49°9°–58°14°
Typical high / low
58°14° / 40°4°
Wind
15 mph24 km/h, gusts 26 mph42 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 61°16°, low 54°12°. Typical 58°14° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  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
59°15°–62°17°
Low, likely
53°12°–56°13°
Typical high / low
58°14° / 40°4°
Wind
15 mph24 km/h, gusts 27 mph44 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 62°17°, low 56°13°. Typical 57°14° / 40°4°. Rain, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 60°16°
  20% chance
4. Overnight
  midnight–6 AM
  Showers, 61°16°
  40% chance · 0.07 in1.9 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
58°14°–65°18°
Low, likely
54°12°–60°16°
Typical high / low
57°14° / 40°4°
Wind
15 mph24 km/h, gusts 25 mph40 km/h
UV peak
2
Monday, Nov 2. Showers. High 64°18°, low 60°16°. Typical 57°14° / 40°4°. Rain 0.3 in7.6 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Showers, 62°16°
  40% chance · 0.05 in1.3 mm
2. Afternoon
  noon–6 PM
  Showers, 64°18°
  30% chance · 0.11 in2.8 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°–67°19°
Low, likely
58°14°–64°18°
Typical high / low
57°14° / 40°4°
Wind
24 mph38 km/h, gusts 31 mph50 km/h

10 days15 days30 days

The outlook

Today
Dry, high 59°, low 38°.
Tomorrow
Dry, high 60°, low 40°.
Monday
Dry, high 63°, low 46°, warming up.
Rest of week
Mostly dry, highs 54–64°.

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

Fort Pond Bay at Montauk (IN MLLW)

14 mi

Below flood stage

Level: 1.4 ft

Forecast peak 3.9 ft Tue 11 AM

Reading from Sat 1:06 PM · NWS gauge page

Long Island Sound near New London Harbor (IN MLLW)

25 mi

Below flood stage

Level: 1.8 ft

Forecast peak 4.3 ft Tue 10 AM

Reading from Sat 1 PM · NWS gauge page

Shelter Island Sound at Shelter Island (IN MLLW)

5.4 mi

Level: 2.5 ft

Reading from Sat 1 PM · NWS gauge page

Orient Harbor at Orient (IN MLLW)

9.6 mi

Below flood stage

Level: 2.2 ft

Reading from Sat 12:54 PM · NWS gauge page

For your home

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

Heating this week

About 73% less heating than a typical week.

This week 28Typical 105

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 12
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 3 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 39°F).

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

Bridgehampton · official normals 1991–2020 · records 1930–2026

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

Northwest Harbor 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 31 min less
Golden hour: 5:16–6:12 PM; Morning 6:53–7:48 AM
Blue hour: 6:12–6:23 PM; Morning 6:42–6:53 AM; first light 6:42 AM

Stars tonight? Fair

Mostly clear 8 PM–6:43 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:20 AM · rises 4:51 PM
Full moon: Oct 26
New moon: Nov 9

Looking north from Northwest Harbor. The highest point on the skyline is about 9,800 ft, 85 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

Northwest Harbor, NY weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Fort Pond Bay at Montauk (IN MLLW)

Long Island Sound near New London Harbor (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