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

Barnstable County, Massachusetts, United States

Last updated: 4:43 PM CDT  ·  Refresh
16°C
Feels like 9°
Overcast
▲ 17°  /  ▼ 14°
Wind
25 mph NE
Humidity
95%
Dew Point
15°
Pressure
29.73 inHg
Visibility
4 mi
UV Index
0.9
Cloud Cover
96%
Sunrise
6:32 AM
Sunset
6:31 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Barnstable County is currently overcast at 15°C. Precipitation is likely — peak probability 90% around 5 PM. Sunrise: 6:32AM · Sunset: 6:31PM.

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
35 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
16°
90%
6 PM
16°
90%
7 PM
16°
90%
8 PM
16°
85%
9 PM
16°
84%
10 PM
17°
82%
11 PM
17°
81%
12 AM
17°
81%
1 AM
17°
81%
2 AM
17°
90%
3 AM
17°
90%
4 AM
17°
79%
5 AM
17°
81%
6 AM
18°
90%
7 AM
18°
90%
8 AM
18°
90%
9 AM
19°
90%
10 AM
19°
85%
11 AM
19°
80%
12 PM
19°
69%
1 PM
19°
69%
2 PM
19°
59%
3 PM
19°
59%
4 PM
19°
60%
7-Day Forecast
Today
17° 14°
Overcast with a 90% chance of rain.
Sun
19° 16°
Overcast with a 90% chance of rain.
Mon
18° 16°
Overcast with a 52% chance of rain.
Tue
17° 14°
Overcast with a 50% chance of rain.
Wed
18° 14°
Clear.
Thu
21° 14°
Clear.
Fri
19° 13°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 16° Overcast 90% 25 mph NE 95%
6 PM 16° Overcast 90% 26 mph NE 95%
7 PM 16° Heavy Rain 90% 25 mph NE 96%
8 PM 16° Heavy Rain 85% 25 mph NE 96%
9 PM 16° Overcast 84% 24 mph NE 97%
10 PM 17° Heavy Rain 82% 23 mph NE 97%
11 PM 17° Overcast 81% 24 mph NE 98%
12 AM 17° Overcast 81% 24 mph NE 97%
1 AM 17° Heavy Rain 81% 24 mph NE 97%
2 AM 17° Heavy Rain 90% 23 mph NE 97%
3 AM 17° Heavy Rain 90% 21 mph ENE 97%
4 AM 17° Heavy Rain 79% 19 mph ENE 96%
5 AM 17° Overcast 81% 19 mph ENE 96%
6 AM 18° Overcast 90% 19 mph ENE 96%
7 AM 18° Overcast 90% 18 mph ENE 96%
8 AM 18° Overcast 90% 18 mph E 95%
9 AM 19° Overcast 90% 18 mph E 95%
10 AM 19° Overcast 85% 17 mph E 94%
11 AM 19° Rain 80% 16 mph E 93%
12 PM 19° Mostly Cloudy 69% 15 mph E 92%
1 PM 19° Mostly Cloudy 69% 14 mph E 90%
2 PM 19° Mostly Cloudy 59% 14 mph E 90%
3 PM 19° Mostly Cloudy 59% 14 mph E 90%
4 PM 19° Overcast 60% 14 mph E 91%
15-Day Forecast
Today
9/26
Overcast
90%
14°
17°
Sun
9/27
Overcast
90%
16°
19°
Mon
9/28
Overcast
52%
16°
18°
Tue
9/29
Overcast
50%
14°
17°
Wed
9/30
Clear
3%
14°
18°
Thu
10/1
Clear
8%
14°
21°
Fri
10/2
Clear
17%
13°
19°
Sat
10/3
Clear
42%
12°
17°
Sun
10/4
Rain
68%
13°
18°
Mon
10/5
Drizzle
51%
14°
20°
Tue
10/6
Drizzle
60%
12°
19°
Wed
10/7
Drizzle
60%
12°
15°
Thu
10/8
Drizzle
60%
12°
14°
Fri
10/9
Clear
25%
11°
14°
Sat
10/10
Drizzle
90%
12°
15°
35
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
20 AQI 3.7 µg/m³
O3
Ground-level ozone
Dominant
35 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sun 35 Good 35 20
Mon 37 Good 35 37
Tue 34 Good 34 27
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 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
MLCAPE15 J/kg
MUCAPE141 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index7.6
Kinematics
0–6 km Shear41 kt
0–1 km Shear19 kt
Eff. Shear9 kt
0–1 km SRH173
0–3 km SRH294
Eff. SRH12
Storm Motion135° @ 13 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.4
Thermo & Levels
PWAT1.89 in
0–3 km LR3.1 °C/km
700–500 LR6.0 °C/km
Total Totals46.9
LCL996 hPa
LFC1007 hPa
EL1007 hPa
Freezing Lvl13,215 ft