10-day forecast for Harwich, MA: 61° to 90°, with precipitation expected on 5 days. The table below breaks each day into morning, afternoon, evening and overnight.
86°
Best day: Monday, August 10
77° · 0.41 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1086° / 70°0
Morning76°feels 77°
Afternoon85°feels 88°
Evening78°feels 79°
Overnight73°feels 74°
86 °
Harwich, Monday, 10 August
Clear. High 86°, low 70°.
Pressure29.97 inHg
Wind7.1 mph S
Humidity54%
Visibility6.2 mi
Dew point62°
Tue, 1181° / 72°0.1
Morning73°feels 74°
Afternoon80°feels 82°
Evening76°feels 77°
Overnight73°feels 75°
81 °
Harwich, Tuesday, 11 August
Rain. High 81°, low 72°.
Pressure29.77 inHg
Wind5.6 mph W
Humidity68%
Visibility6.2 mi
Dew point66°
Wed, 1277° / 69°0.02
Morning72°feels 72°
Afternoon74°feels 74°
Evening71°feels 71°
Overnight71°feels 71°
77 °
Harwich, Wednesday, 12 August
Light rain. High 77°, low 69°.
Pressure29.77 inHg
Wind6 mph SE
Humidity49%
Visibility6.2 mi
Dew point58°
Thu, 1377° / 70°0.41
Morning71°feels 72°
Afternoon73°feels 74°
Evening76°feels 76°
Overnight70°feels 71°
77 °
Harwich, Thursday, 13 August
Rain. High 77°, low 70°.
Pressure29.68 inHg
Wind16.9 mph W
Humidity88%
Visibility—
Dew point69°
Fri, 1475° / 63°0
Morning64°feels 63°
Afternoon69°feels 68°
Evening73°feels 72°
Overnight65°feels 64°
75 °
Harwich, Friday, 14 August
Clear. High 75°, low 63°.
Pressure29.85 inHg
Wind20.2 mph NW
Humidity51%
Visibility—
Dew point49°
Sat, 1572° / 61°0
Morning63°feels 62°
Afternoon69°feels 69°
Evening71°feels 71°
Overnight67°feels 66°
72 °
Harwich, Saturday, 15 August
Clear. High 72°, low 61°.
Pressure29.91 inHg
Wind18 mph W
Humidity50%
Visibility—
Dew point49°
Sun, 1671° / 67°0
Morning68°feels 67°
Afternoon71°feels 70°
Evening70°feels 70°
Overnight68°feels 67°
71 °
Harwich, Sunday, 16 August
Overcast. High 71°, low 67°.
Pressure30.09 inHg
Wind13.1 mph NW
Humidity59%
Visibility—
Dew point55°
Mon, 1776° / 67°0.14
Morning71°feels 71°
Afternoon75°feels 75°
Evening73°feels 73°
Overnight67°feels 67°
76 °
Harwich, Monday, 17 August
Light rain. High 76°, low 67°.
Pressure30.03 inHg
Wind16.2 mph S
Humidity54%
Visibility—
Dew point57°
Tue, 1875° / 66°0.22
Morning68°feels 68°
Afternoon73°feels 72°
Evening74°feels 74°
Overnight70°feels 70°
75 °
Harwich, Tuesday, 18 August
Light rain. High 75°, low 66°.
Pressure30.03 inHg
Wind9.8 mph S
Humidity60%
Visibility—
Dew point57°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Harwich, MA around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.