Now

80°

10%

7 mph

18:00

79°

17%

6 mph

19:00

78°

17%

6 mph

20:00

76°

31%

16 mph

21:00

73°

0.09 in

21 mph

22:00

72°

0.16 in

20 mph

23:00

71°

0.49 in

19 mph

00:00

70°

0.93 in

18 mph

01:00

70°

1.11 in

15 mph

02:00

69°

1.30 in

13 mph

03:00

69°

1.38 in

13 mph

04:00

69°

1.52 in

13 mph

05:00

69°

1.57 in

12 mph

06:00

65°

42%

13 mph

07:00

65°

53%

14 mph

08:00

66°

30%

13 mph

09:00

67°

23%

13 mph

10:00

68°

14 mph

11:00

70°

13 mph

12:00

72°

12 mph

13:00

73°

12 mph

14:00

73°

13 mph

15:00

73°

12 mph

16:00

73°

12%

12 mph

10-day forecast

Updated 5:49 PM

Thu · Today · 20 Aug Sunny

87° 71° 0.74 in

Fri · Tomorrow · 21 Aug Heavy rain

73° 65° 7.83 in

Saturday · 22 Aug Showers

70° 66° 0.18 in

Sunday · 23 Aug Showers

77° 69° 0.60 in

Monday · 24 Aug Sunny

75° 67° 0.01 in

Tuesday · 25 Aug Mostly cloudy

73° 64° 9%

Wednesday · 26 Aug Mostly cloudy

77° 67° 8%

Thursday · 27 Aug Mostly cloudy

75° 69° 21%

Friday · 28 Aug Sunny

71° 66° 0.09 in

Saturday · 29 Aug Mostly cloudy

74° 65° 16%

Details & indices

Wind

7 mph SW

Gusts 10 mph

Humidity

63%

Dew point 66°

Pressure

29.97 inHg

Rising

UV index

8 — Very high

High today

Air Quality

Unhealthy for Sensitive Groups

AQI 145 · US EPA

Allergy

None detected

—

Visibility

6 mi

Clear view

Allergy — Southold

🌿 Conditions right now

View all →

Birch

None

Grass

None

Oak

None

Alder

None

Hazel

None

Mugwort

None

Ragweed

None

Sun & moon

Sunrise6:04 AM

Sunset7:41 PM

Length of day13h 37m

Moonrise2:44 PM

Moonset11:33 PM

Moon phase🌓 First Quarter · 58%

Next full moonAug 28 Sturgeon Moon

Latitude41.0648°N

Longitude-72.4262°E

Water temps nearby

View all →

Montauk (25 mi)76°

Misquamicut (39 mi)74°

🌤️No rain expected in the next 90 minutes

Now+30+60+90 min

Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast

Laundry day

Poor

Line-drying weather

Grilling

Poor

Fire up the grill

Running

Poor

Lace up outside

Patio

Fair

Dinner outdoors

Nearby places in {{REGION}}

Data sources · Thursday, August 20

Where the Southold forecast comes from

This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 41.0648°N, -72.4262°.

NBM + global weather models

Updated: 5:49 PM

Weather in Southold

Southold's outlook: warmest day near 87° (Thursday), coldest night about 64° (Tuesday). About 9.5 in of precipitation is expected in total; the most likely wet day is Sunday (90% chance). Expect a blustery spell — gusts near 29 mph on Thursday. No watches or warnings are active for the area right now. Right now Southold is about 9° cooler than nearby Boston. Longer view: classic Northeast mix — nor'easters, humid spells and a glorious fall.

Southold, NY · Elev 23 ft · 41.06°N, 72.43°W · New York · Forecast computed for these exact coordinates

Southold, NY Weather (11971)

Weather map — Southold

Today · Thu 8/20

Tonight · Thu 8/20

Tomorrow · Fri 8/21

7-day trend

10-day forecast

Details & indices

🌿 Conditions right now

Sun & moon

Water temps nearby

Daily planner