Harwich Port, Massachusetts Weather
Solstice approaches — longest light. Day 86 of spring. Read this microseason across nine climate regions →
Harwich Port weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 13Overcast10%—82°64°—
- SundayJun 14Overcast40%—78°60°-4°
- MondayJun 15Heavy Rain83%0.20″76°65°-2°
- TuesdayJun 16Overcast——74°62°-2°
- WednesdayJun 17Overcast——75°61°+1°
- ThursdayJun 18Light Drizzle27%—76°64°+1°
- FridayJun 19Drizzle27%0.17″69°59°-7°
AQI 94 (Moderate), driven by Ozone. AQI down 57 over the last 6 hours — air quality is improving sharply. Ozone at AQI 43 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 19 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 19 around 1 PM.
- Present
- AQI 43
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 19
PM × Wind × Precip
PM2.5 at 5.8 µg/m³, PM10 at 6.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.89
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
Cut your thistles before St. John, you will have two instead of one.
- Moonrise
- 3:13 AM
- Moonset
- 7:18 PM
- In sign
- ♉︎ Taurus
Solstice approaches — longest light
Harwich Port at a glance
- Today vs. normal: 73°F — typical for the season
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Prune spring-blooming shrubs after flowers fade.
15-Day Forecast — Harwich Port
- Sat82°64°10%
- Sun78°60°40%
- Mon76°65°83%
- Tue74°62°1%
- Wed75°61°4%
- Thu76°64°27%
- Fri69°59°27%
- Sat77°59°15%
- Sun78°62°11%
- Mon67°57°22%
- Tue72°58°22%
- Wed77°60°18%
- Thu74°62°16%
- Fri75°66°23%
- Sat80°63°19%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 13, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Harwich Port
SPC has placed Harwich Port in the General Thunderstorms category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Harwich Port
- 02645
- 02646