High Wind Warning — Eastern Essex, MA, Suffolk, MA, Eastern Norfolk, MA, Eastern Plymouth, MA, Southern Bristol, MA, Southern Plymouth, MA, Barnstable, MA, Dukes, MA, Nantucket, MA, Bristol, RI, Washington, RI, Newport, RI, Block Island, RI 7:00 AM High Surf Advisory — Eastern Essex, MA, Suffolk, MA, Eastern Norfolk, MA, Eastern Plymouth, MA, Barnstable, MA, Dukes, MA, Nantucket, MA 7:00 PM Coastal Flood Warning — Eastern Essex, MA, Suffolk, MA, Eastern Norfolk, MA, Eastern Plymouth, MA, Barnstable, MA, Dukes, MA, Nantucket, MA 7:00 PM Flood Watch 1:00 AM

Nantucket, Massachusetts

Last updated: 4:43 PM CDT  ·  Refresh
16°C
Feels like 9°
Overcast
▲ 18°  /  ▼ 14°
Wind
28 mph NE
Humidity
97%
Dew Point
16°
Pressure
29.68 inHg
Visibility
8 mi
UV Index
0.9
Cloud Cover
96%
Sunrise
6:32 AM
Sunset
6:30 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Nantucket is currently overcast at 16°C. Precipitation is likely — peak probability 90% around 5 PM. Sunrise: 6:32AM · Sunset: 6:30PM.

Alerts

High Wind Warning
Eastern Essex, MA, Suffolk, MA, Eastern Norfolk, MA, Eastern Plymouth, MA, Southern Bristol, MA, Southern Plymouth, MA, Barnstable, MA, Dukes, MA, Nantucket, MA, Bristol, RI, Washington, RI, Newport, RI, Block Island, RI
Expires 7:00 AM
High Surf Advisory
Eastern Essex, MA, Suffolk, MA, Eastern Norfolk, MA, Eastern Plymouth, MA, Barnstable, MA, Dukes, MA, Nantucket, MA
Expires 7:00 PM
Coastal Flood Warning
Eastern Essex, MA, Suffolk, MA, Eastern Norfolk, MA, Eastern Plymouth, MA, Barnstable, MA, Dukes, MA, Nantucket, MA
Expires 7:00 PM
Flood Watch
Expires 1:00 AM
37 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
16°
90%
6 PM
17°
90%
7 PM
17°
90%
8 PM
17°
85%
9 PM
17°
84%
10 PM
17°
67%
11 PM
17°
81%
12 AM
17°
81%
1 AM
18°
81%
2 AM
18°
85%
3 AM
18°
85%
4 AM
18°
85%
5 AM
18°
70%
6 AM
18°
62%
7 AM
18°
79%
8 AM
18°
79%
9 AM
18°
74%
10 AM
18°
74%
11 AM
18°
64%
12 PM
18°
53%
1 PM
18°
53%
2 PM
18°
53%
3 PM
18°
52%
4 PM
18°
52%
7-Day Forecast
Today
18° 14°
Overcast with a 90% chance of rain.
Sun
18° 17°
Rain, 85% chance.
Mon
18° 16°
Mostly Cloudy with a 47% chance of rain.
Tue
17° 15°
Overcast with a 26% chance of rain.
Wed
17° 14°
Clear.
Thu
18° 14°
Drizzle, 43% chance.
Fri
17° 13°
Clear with a 44% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 16° Overcast 90% 28 mph NE 97%
6 PM 17° Fog 90% 26 mph NE 97%
7 PM 17° Fog 90% 25 mph NE 98%
8 PM 17° Fog 85% 24 mph NE 98%
9 PM 17° Fog 84% 24 mph NE 98%
10 PM 17° Fog 67% 24 mph NE 98%
11 PM 17° Fog 81% 26 mph NE 97%
12 AM 17° Haze 81% 26 mph ENE 96%
1 AM 18° Rain 81% 26 mph ENE 94%
2 AM 18° Overcast 85% 25 mph ENE 94%
3 AM 18° Overcast 85% 24 mph E 94%
4 AM 18° Overcast 85% 22 mph E 94%
5 AM 18° Rain 70% 23 mph E 94%
6 AM 18° Rain 62% 22 mph E 94%
7 AM 18° Rain 79% 22 mph E 94%
8 AM 18° Rain 79% 21 mph E 94%
9 AM 18° Rain 74% 19 mph E 94%
10 AM 18° Rain 74% 18 mph E 94%
11 AM 18° Mostly Cloudy 64% 17 mph E 93%
12 PM 18° Mostly Cloudy 53% 17 mph E 92%
1 PM 18° Mostly Cloudy 53% 16 mph E 90%
2 PM 18° Mostly Cloudy 53% 16 mph E 91%
3 PM 18° Mostly Cloudy 52% 16 mph E 92%
4 PM 18° Haze 52% 16 mph E 92%
15-Day Forecast
Today
9/26
Overcast
90%
14°
18°
Sun
9/27
Rain
85%
17°
18°
Mon
9/28
Mostly Cloudy
47%
16°
18°
Tue
9/29
Overcast
26%
15°
17°
Wed
9/30
Clear
3%
14°
17°
Thu
10/1
Drizzle
43%
14°
18°
Fri
10/2
Clear
44%
13°
17°
Sat
10/3
Drizzle
53%
13°
17°
Sun
10/4
Drizzle
44%
13°
17°
Mon
10/5
Drizzle
51%
14°
18°
Tue
10/6
Drizzle
60%
13°
17°
Wed
10/7
Drizzle
60%
13°
14°
Thu
10/8
Clear
60%
12°
14°
Fri
10/9
Clear
25%
12°
14°
Sat
10/10
Drizzle
60%
13°
14°
37
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
29 AQI 5.3 µg/m³
O3
Ground-level ozone
Dominant
37 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sun 37 Good 37 29
Mon 36 Good 36 36
Tue 37 Good 37 24
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 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Sat Sep 26, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE14 J/kg
MUCAPE215 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index7.0
Kinematics
0–6 km Shear46 kt
0–1 km Shear26 kt
Eff. Shear8 kt
0–1 km SRH202
0–3 km SRH224
Eff. SRH0
Storm Motion154° @ 16 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.1
Thermo & Levels
PWAT1.89 in
0–3 km LR3.6 °C/km
700–500 LR5.3 °C/km
Total Totals44.2
LCL997 hPa
LFC—
EL—
Freezing Lvl12,887 ft