High Surf Advisory — Southern Bristol, MA, Southern Plymouth, MA, Barnstable, MA, Dukes, MA, Nantucket, MA, Washington, RI, Newport, RI, Block Island, RI 7:00 PM

Dartmouth, Massachusetts

Last updated: 5:51 PM CDT  ·  Refresh
22°C
Feels like 22°
Fog
▲ 24°  /  ▼ 18°
Wind
16 mph SSE
Humidity
95%
Dew Point
21°
Pressure
29.68 inHg
Visibility
0 mi
UV Index
0.9
Cloud Cover
99%
Sunrise
5:28 AM
Sunset
8:12 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Dartmouth is currently fog at 22°C. Precipitation is likely — peak probability 90% around 6 PM. Atmospheric instability is elevated (CAPE up to 1017 J/kg) — isolated convective development possible. Sunrise: 5:28AM · Sunset: 8:12PM.

Alerts

High Surf Advisory
Southern Bristol, MA, Southern Plymouth, MA, Barnstable, MA, Dukes, MA, Nantucket, MA, Washington, RI, Newport, RI, Block Island, RI
Expires 7:00 PM
63 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
90%
7 PM
23°
90%
8 PM
23°
90%
9 PM
22°
87%
10 PM
22°
68%
11 PM
22°
62%
12 AM
22°
66%
1 AM
22°
52%
2 AM
22°
55%
3 AM
22°
56%
4 AM
21°
52%
5 AM
21°
70%
6 AM
21°
66%
7 AM
21°
66%
8 AM
22°
66%
9 AM
22°
50%
10 AM
23°
50%
11 AM
23°
51%
12 PM
23°
51%
1 PM
24°
43%
2 PM
24°
44%
3 PM
24°
40%
4 PM
25°
41%
5 PM
24°
44%
7-Day Forecast
Tonight
24° 18°
Fog with a 90% chance of rain.
Wed
25° 19°
Mostly Cloudy with a 66% chance of rain.
Thu
23° 15°
Partly Cloudy with a 31% chance of rain.
Fri
24° 13°
Fog.
Sat
24° 13°
Fog.
Sun
24° 16°
Rain, 71% chance.
Mon
26° 17°
Drizzle, 55% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Fog 90% 16 mph SSE 95%
7 PM 23° Rain 90% 14 mph S 98%
8 PM 23° Overcast 90% 14 mph S 97%
9 PM 22° Heavy Rain 87% 14 mph S 97%
10 PM 22° Overcast 68% 13 mph SSW 97%
11 PM 22° Heavy Rain 62% 13 mph SSW 97%
12 AM 22° Overcast 66% 14 mph SSW 97%
1 AM 22° Overcast 52% 14 mph SSW 96%
2 AM 22° Overcast 55% 14 mph SSW 96%
3 AM 22° Overcast 56% 14 mph SSW 96%
4 AM 21° Drizzle 52% 13 mph SSW 96%
5 AM 21° Rain 70% 14 mph SSW 94%
6 AM 21° Overcast 66% 13 mph SSW 93%
7 AM 21° Drizzle 66% 13 mph SSW 91%
8 AM 22° Overcast 66% 13 mph SSW 90%
9 AM 22° Mostly Cloudy 50% 14 mph SSW 87%
10 AM 23° Mostly Cloudy 50% 14 mph SSW 85%
11 AM 23° Mostly Cloudy 51% 13 mph SSW 85%
12 PM 23° Mostly Cloudy 51% 14 mph SSW 84%
1 PM 24° Partly Cloudy 43% 14 mph SSW 84%
2 PM 24° Partly Cloudy 44% 14 mph SSW 84%
3 PM 24° Partly Cloudy 40% 14 mph SSW 84%
4 PM 25° Partly Cloudy 41% 14 mph SSW 83%
5 PM 24° Partly Cloudy 44% 13 mph SSW 85%
15-Day Forecast
Today
7/21
Fog
90%
18°
24°
Wed
7/22
Mostly Cloudy
66%
19°
25°
Thu
7/23
Partly Cloudy
31%
15°
23°
Fri
7/24
Fog
16%
13°
24°
Sat
7/25
Fog
14%
13°
24°
Sun
7/26
Rain
71%
16°
24°
Mon
7/27
Drizzle
55%
17°
26°
Tue
7/28
Drizzle
53%
18°
25°
Wed
7/29
Drizzle
68%
17°
24°
Thu
7/30
Drizzle
68%
17°
25°
Fri
7/31
Drizzle
64%
19°
23°
Sat
8/1
Drizzle
60%
19°
23°
Sun
8/2
Drizzle
60%
18°
23°
Mon
8/3
Drizzle
60%
19°
23°
Tue
8/4
Drizzle
60%
20°
24°
63
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
63 AQI 15.8 µg/m³
O3
Ground-level ozone
40 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 63 Moderate 40 63
Thu 47 Good 47 28
Fri 37 Good 37 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 Tue Jul 21, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE252 J/kg
MLCAPE416 J/kg
MUCAPE983 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-1.5
Kinematics
0–6 km Shear31 kt
0–1 km Shear23 kt
Eff. Shear33 kt
0–1 km SRH48
0–3 km SRH40
Eff. SRH40
Storm Motion178° @ 42 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.1
STP (eff)0.1
Supercell0.7
K-Index40.4
Thermo & Levels
PWAT2.33 in
0–3 km LR4.9 °C/km
700–500 LR5.5 °C/km
Total Totals48.7
LCL992 hPa
LFC1005 hPa
EL415 hPa
Freezing Lvl13,727 ft