New York, NY 29° Los Angeles, CA 38° Chicago, IL 30° Houston, TX 36° Miami, FL 34° Phoenix, AZ 46° Seattle, WA 18° Denver, CO 35° Toronto, ON 24° Vancouver, BC 19°
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Smithtown, NY Weather (11787)

Current WeatherSmithtown · 3:19 PM EDT
30° | 20°
30°C
Feels like 34°
Sunny
WindSW 9 mph · Gusts 10 mph
Precip33% · 0.01 in
Humidity66% · Dew point 23°
UV index8 Very high
Air Quality99 Moderate
Pressure29.97 inHg
Visibility6 mi
Sunrise / Sunset6:15 AM · 7:32 PM · 13h 17m

Weather map — Smithtown

Full radar →
Now
30°
4%
9 mph
16:00
28°
15%
9 mph
17:00
27°
15%
8 mph
18:00
26°
21%
4 mph
19:00
26°
19%
2 mph
20:00
26°
16%
3 mph
21:00
25°
15%
5 mph
22:00
25°
16%
8 mph
23:00
24°
14%
9 mph
00:00
23°
7%
9 mph
01:00
22°
4%
9 mph
02:00
21°
2%
11 mph
03:00
20°
2%
10 mph
04:00
20°
2%
10 mph
05:00
19°
3%
10 mph
06:00
19°
3%
9 mph
07:00
19°
2%
7 mph
08:00
20°
2%
8 mph
09:00
21°
3%
7 mph
10:00
22°
6%
6 mph
11:00
24°
7%
5 mph
12:00
25°
9%
4 mph
13:00
26°
6%
4 mph
14:00
26°
2%
4 mph

Today · Fri 8/28

High 30°
33% / 0.01 in

Mostly cloudy. Winds SW at 9 mph.

Tonight · Fri 8/28

Low 19°
15% / –

Mostly cloudy. Winds N at 5 mph.

Tomorrow · Sat 8/29

27° | 19°
3% / –

Sunny. Winds N at 11 mph.

7-day trend

Smithtown · temperature + precipitation

10-day forecast

Updated 3:19 PM

Details & indices

Wind
9 mph SW
Gusts 10 mph
Humidity
66%
Dew point 23°
Pressure
29.97 inHg
Rising
UV index
8 — Very high
High today
Air Quality
Moderate
AQI 99 · US EPA
Allergy
High
Grass
Visibility
6 mi
Clear view
Allergy — Smithtown

🌿 Conditions right now

View all →
Birch
None
Grass
Moderate
Oak
None
Alder
None
Hazel
None
Mugwort
Moderate
Ragweed
Moderate

Sun & moon

Sunrise6:15 AM
Sunset7:32 PM
Length of day13h 17m
Moonrise7:43 PM
Moonset6:36 AM
Next full moonSep 26 Harvest Moon
Latitude40.8559°N
Longitude-73.2007°E

Water temps nearby

View all →
Jones Beach (24 mi)76°
Rockaway Beach (37 mi)77°
Coney Island Beach (45 mi)78°
Asbury Park (61 mi)76°
🌤️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
Fair
Line-drying weather
Grilling
Great
Fire up the grill
Running
Poor
Lace up outside
Patio
Great
Dinner outdoors
Nearby places in {{REGION}}
New York
Partly cloudy
29°
Brooklyn
Mostly cloudy
31°
Queens
Sunny
28°
Manhattan
Partly cloudy
29°
The Bronx
Partly cloudy
29°
Staten Island
Partly cloudy
28°
Data sources · Friday, August 28
Where the Smithtown 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: 40.8559°N, -73.2007°.
NBM + global weather models
Updated: 3:19 PM
Weather in Smithtown
Smithtown's outlook: warmest day near 34° (Thursday), coldest night about 18° (Sunday). Models drop roughly 1.3 in of precipitation across the stretch — watch Wednesday (92%). Wind is the one to watch: gusts to 32 mph around Tuesday. No active NWS alerts at the moment — quiet on the hazards front. Right now Smithtown is running about 61° warmer than Springfield. Longer view: classic Northeast mix — nor'easters, humid spells and a glorious fall.
Smithtown, NY · Elev 59 ft · 40.86°N, 73.20°W · New York · Forecast computed for these exact coordinates
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 3:19 PM