Suffolk County, New York, United States

Last updated: 9:33 PM CDT  ·  Refresh
23°C
Feels like 24°
Overcast
▲ 24°  /  ▼ 20°
Wind
11 mph SSW
Humidity
93%
Dew Point
22°
Pressure
29.63 inHg
Visibility
7 mi
UV Index
0.0
Cloud Cover
91%
Sunrise
5:37 AM
Sunset
8:17 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Suffolk County is currently overcast at 23°C. Precipitation is likely — peak probability 59% around 12 PM. Atmospheric instability is elevated (CAPE up to 1495 J/kg) — isolated convective development possible. Sunrise: 5:37AM · Sunset: 8:17PM.

Alerts

No active alerts for this location.
74 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
31%
11 PM
22°
47%
12 AM
22°
52%
1 AM
22°
54%
2 AM
22°
38%
3 AM
22°
49%
4 AM
22°
54%
5 AM
22°
54%
6 AM
22°
44%
7 AM
22°
45%
8 AM
22°
45%
9 AM
24°
45%
10 AM
24°
45%
11 AM
26°
58%
12 PM
26°
58%
1 PM
27°
49%
2 PM
27°
40%
3 PM
27°
41%
4 PM
27°
37%
5 PM
27°
25%
6 PM
26°
21%
7 PM
26°
21%
8 PM
25°
22%
9 PM
23°
22%
7-Day Forecast
Tonight
24° 20°
Overcast with a 31% chance of rain.
Wed
27° 21°
Partly Cloudy with a 54% chance of rain.
Thu
24° 18°
Partly Cloudy.
Fri
24° 17°
Haze.
Sat
24° 18°
Clear.
Sun
25° 18°
Drizzle, 70% chance.
Mon
26° 20°
Drizzle, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Overcast 31% 11 mph SSW 93%
11 PM 22° Overcast 47% 12 mph SSW 92%
12 AM 22° Overcast 52% 12 mph SSW 92%
1 AM 22° Overcast 54% 12 mph SSW 92%
2 AM 22° Overcast 38% 12 mph SSW 92%
3 AM 22° Overcast 49% 11 mph SSW 92%
4 AM 22° Rain 54% 12 mph SSW 92%
5 AM 22° Rain 54% 13 mph SSW 92%
6 AM 22° Overcast 44% 12 mph SW 91%
7 AM 22° Mostly Cloudy 45% 12 mph SW 90%
8 AM 22° Mostly Cloudy 45% 12 mph SW 88%
9 AM 24° Mostly Cloudy 45% 12 mph SW 86%
10 AM 24° Rain 45% 11 mph SW 84%
11 AM 26° Rain 58% 11 mph SW 81%
12 PM 26° Partly Cloudy 58% 10 mph SW 76%
1 PM 27° Mostly Clear 49% 10 mph SW 72%
2 PM 27° Mostly Clear 40% 10 mph SW 70%
3 PM 27° Mostly Clear 41% 9 mph SW 68%
4 PM 27° Mostly Clear 37% 9 mph WSW 66%
5 PM 27° Partly Cloudy 25% 8 mph WSW 67%
6 PM 26° Partly Cloudy 21% 7 mph WSW 71%
7 PM 26° Partly Cloudy 21% 6 mph WSW 75%
8 PM 25° Partly Cloudy 22% 6 mph WSW 74%
9 PM 23° Partly Cloudy 22% 6 mph W 69%
15-Day Forecast
Today
7/21
Overcast
31%
20°
24°
Wed
7/22
Partly Cloudy
54%
21°
27°
Thu
7/23
Partly Cloudy
11%
18°
24°
Fri
7/24
Haze
16%
17°
24°
Sat
7/25
Clear
8%
18°
24°
Sun
7/26
Drizzle
70%
18°
25°
Mon
7/27
Drizzle
60%
20°
26°
Tue
7/28
Rain
63%
20°
26°
Wed
7/29
Rain
69%
21°
26°
Thu
7/30
Drizzle
44%
19°
26°
Fri
7/31
Drizzle
60%
20°
26°
Sat
8/1
Drizzle
60%
21°
26°
Sun
8/2
Drizzle
60%
21°
26°
Mon
8/3
Drizzle
60%
22°
26°
Tue
8/4
Drizzle
60%
22°
27°
74
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
74 AQI 21.3 µg/m³
O3
Ground-level ozone
42 AQI 46 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 74 Moderate 42 74
Thu 49 Good 49 46
Fri 43 Good 32 43
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Wed Jul 22, 01:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE376 J/kg
MLCAPE542 J/kg
MUCAPE687 J/kg
SBCIN-88 J/kg
MLCIN0 J/kg
Lifted Index-2.4
Kinematics
0–6 km Shear32 kt
0–1 km Shear18 kt
Eff. Shear32 kt
0–1 km SRH-57
0–3 km SRH-90
Eff. SRH-90
Storm Motion213° @ 37 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.5
Thermo & Levels
PWAT1.94 in
0–3 km LR5.0 °C/km
700–500 LR5.5 °C/km
Total Totals45.9
LCL984 hPa
LFC774 hPa
EL315 hPa
Freezing Lvl15,246 ft