Observed 11:50 AM EDT at KHYA

South Yarmouth, MA weather

Partly cloudy and 54°12°, jacket by 5 PM.

Mostly agree

Now 54°12°

Partly sunny

Wind: 7 mph11 km/h; From the northeast. Up to 7 mph11 km/h through 12 AM
Dew point: 39°4°; Comfortable
UV index: 3Moderate; Moderate until 2 PM
Air quality: 26Good; Main pollutant: Ozone
Pressure: 30.51 inHg1033 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 58°14° today at 2 PM
Below 50°10° tonight after 7 PM
Low 35°2° tonight at 5 AM
Above 50°10° tomorrow by 10 AM

This afternoonNear 56°13° · Clear
TonightDown to 35°2° by 5 AM · Clear
Tomorrow morningUp to 56°13° by 11 AM · Clear
Tomorrow afternoonNear 58°14° · Clear
Tomorrow nightDown to 43°6° by 2 AM · Clear
Monday morningUp to 58°14° by 11 AM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 12p	Mostly sunny	56°13° (likely 53°12° to 56°13°)	56°13°	0%	7 mph11 km/h from N, gusts 10 mph17 km/h	51%	43%	3
Sat 1p	Mostly sunny	57°14° (likely 53°12° to 57°14°)	57°14°	0%	7 mph11 km/h from N, gusts 9 mph14 km/h	49%	51%	3
Sat 2p	Mostly sunny	58°14° (likely 53°12° to 58°14°)	58°14°	0%	7 mph11 km/h from N, gusts 8 mph13 km/h	45%	18%	2
Sat 3p	Sunny	58°14° (likely 53°12° to 58°14°)	58°14°	0%	6 mph10 km/h from NW, gusts 7 mph12 km/h	45%	9%	1
Sat 4p	Sunny	57°14° (likely 53°12° to 57°14°)	57°14°	0%	3 mph5 km/h from W, gusts 5 mph8 km/h	49%	2%	1
Sat 5p	Sunny	55°13° (likely 52°11° to 55°13°)	55°13°	0%	2 mph3 km/h from W, gusts 4 mph7 km/h	53%	1%	0
Sat 6p	Clear	50°10° (likely 49°9° to 50°10°)	50°10°	0%	2 mph3 km/h from W, gusts 3 mph5 km/h	61%	5%	0
Sat 7p	Clear	46°8° (likely 46°8° to 49°9°)	46°8°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	73%	2%	0
Sat 8p	Clear	42°6° (likely 42°6° to 48°9°)	42°6°	0%	1 mph2 km/h from W, gusts 5 mph7 km/h	86%	0%	0
Sat 9p	Clear	41°5° (likely 41°5° to 47°8°)	41°5°	0%	1 mph2 km/h from W, gusts 5 mph8 km/h	89%	0%	0
Sat 10p	Clear	40°4° (likely 40°4° to 47°8°)	40°4°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	92%	0%	0
Sat 11p	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	0%	0
Sun 12a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	92%	0%	0
Sun 1a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	0%	0
Sun 2a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	92%	0%	0
Sun 3a	Clear	38°3° (likely 38°3° to 45°7°)	38°3°	0%	0 mph0 km/h, gusts 3 mph6 km/h	96%	0%	0
Sun 4a	Clear	36°2° (likely 36°2° to 44°7°)	36°2°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	1%	0
Sun 5a	Clear	35°2° (likely 35°2° to 44°7°)	35°2°	0%	1 mph2 km/h from NE, gusts 3 mph4 km/h	100%	4%	0
Sun 6a	Clear	35°2° (likely 35°2° to 44°7°)	35°2°	0%	1 mph2 km/h from NE, gusts 3 mph4 km/h	100%	6%	0
Sun 7a	Sunny	35°2° (likely 35°2° to 44°7°)	35°2°	0%	1 mph2 km/h from NW, gusts 3 mph4 km/h	100%	9%	0
Sun 8a	Sunny	38°3° (likely 38°3° to 45°7°)	38°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	10%	0
Sun 9a	Sunny	44°7° (likely 44°7° to 49°9°)	44°7°	0%	1 mph2 km/h from W, gusts 2 mph3 km/h	82%	7%	1
Sun 10a	Sunny	51°11° (likely 51°11° to 54°12°)	51°11°	0%	2 mph3 km/h from SW, gusts 4 mph6 km/h	63%	4%	2
Sun 11a	Sunny	56°13° (likely 56°13° to 57°14°)	56°13°	0%	3 mph5 km/h from SW, gusts 6 mph9 km/h	53%	1%	3
Sun 12p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	5 mph8 km/h from S, gusts 7 mph11 km/h	47%	1%	4
Sun 1p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	7 mph11 km/h from S, gusts 8 mph13 km/h	47%	1%	4
Sun 2p	Sunny	59°15° (likely 58°14° to 60°16°)	59°15°	0%	8 mph13 km/h from S, gusts 8 mph13 km/h	49%	2%	4
Sun 3p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	7 mph11 km/h from S, gusts 9 mph14 km/h	49%	2%	3
Sun 4p	Sunny	58°14° (likely 55°13° to 58°14°)	58°14°	0%	7 mph11 km/h from SW, gusts 10 mph15 km/h	53%	2%	2
Sun 5p	Sunny	56°13° (likely 53°12° to 56°13°)	56°13°	0%	6 mph10 km/h from SW, gusts 13 mph20 km/h	57%	2%	1
Sun 6p	Clear	53°12° (likely 50°10° to 53°12°)	53°12°	0%	6 mph10 km/h from SW, gusts 13 mph20 km/h	66%	6%	0
Sun 7p	Clear	50°10° (likely 48°9° to 51°11°)	48°9°	0%	6 mph10 km/h from SW, gusts 12 mph19 km/h	77%	10%	0
Sun 8p	Clear	48°9° (likely 47°8° to 50°10°)	45°7°	0%	6 mph10 km/h from SW, gusts 12 mph19 km/h	86%	13%	0
Sun 9p	Clear	48°9° (likely 46°8° to 50°10°)	46°8°	0%	5 mph8 km/h from SW, gusts 13 mph21 km/h	89%	11%	0
Sun 10p	Clear	48°9° (likely 46°8° to 50°10°)	47°8°	0%	3 mph5 km/h from SW, gusts 13 mph21 km/h	89%	6%	0
Sun 11p	Clear	48°9° (likely 46°8° to 49°9°)	48°9°	0%	2 mph3 km/h from SW, gusts 12 mph20 km/h	89%	3%	0
Mon 12a	Clear	47°8° (likely 45°7° to 49°9°)	47°8°	0%	2 mph3 km/h from SW, gusts 13 mph20 km/h	89%	1%	0
Mon 1a	Clear	45°7° (likely 45°7° to 50°10°)	45°7°	0%	2 mph3 km/h from SW, gusts 11 mph17 km/h	96%	1%	0
Mon 2a	Clear	43°6° (likely 43°6° to 50°10°)	43°6°	0%	2 mph3 km/h from SW, gusts 11 mph18 km/h	100%	1%	0
Mon 3a	Clear	44°7° (likely 43°6° to 49°9°)	42°6°	0%	3 mph5 km/h from SW, gusts 12 mph20 km/h	96%	0%	0
Mon 4a	Clear	45°7° (likely 44°7° to 49°9°)	44°7°	0%	3 mph5 km/h from SW, gusts 13 mph20 km/h	100%	1%	0
Mon 5a	Clear	46°8° (likely 44°7° to 49°9°)	45°7°	0%	3 mph5 km/h from SW, gusts 13 mph21 km/h	100%	0%	0
Mon 6a	Clear	46°8° (likely 44°7° to 49°9°)	45°7°	0%	3 mph5 km/h from SW, gusts 16 mph25 km/h	100%	0%	0
Mon 7a	Sunny	45°7° (likely 45°7° to 48°9°)	43°6°	0%	5 mph8 km/h from SW, gusts 15 mph24 km/h	100%	0%	0
Mon 8a	Sunny	46°8° (likely 45°7° to 50°10°)	44°7°	0%	5 mph8 km/h from SW, gusts 14 mph23 km/h	100%	1%	0
Mon 9a	Sunny	49°9° (likely 49°9° to 55°13°)	47°8°	0%	6 mph10 km/h from SW, gusts 14 mph23 km/h	93%	1%	1
Mon 10a	Sunny	54°12° (likely 54°12° to 57°14°)	54°12°	0%	6 mph10 km/h from W, gusts 16 mph26 km/h	77%	1%	2
Mon 11a	Sunny	58°14° (likely 57°14° to 59°15°)	58°14°	0%	6 mph10 km/h from W, gusts 17 mph27 km/h	69%	17%	3

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Sunny. High 58°14°, low 30°−1°. Typical 59°15° / 43°6°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Sunny, 58°14°
  Dry
2. Evening
  6 PM–midnight
  Clear, 42°6°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 35°2°
  Dry
Official NWS forecast
Today: Sunny, with a high near 58. Northwest wind 2 to 7 mph.
Tonight: Areas of frost after 4am. Clear, with a low around 30. West wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
53°12°–58°14°
Low, likely
30°−1°–45°7°
Typical high / low
59°15° / 43°6°
Wind
8 mph13 km/h, gusts 15 mph23 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 61°16°, low 37°3°. Typical 58°14° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Official NWS forecast
Day: Areas of frost before 8am. Sunny, with a high near 61. Southwest wind 0 to 8 mph.
Night: Clear, with a low around 37. Southwest wind 2 to 6 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
58°14°–61°16°
Low, likely
37°3°–43°6°
Typical high / low
58°14° / 43°6°
Wind
8 mph13 km/h, gusts 17 mph27 km/h
UV peak
4
Monday, Oct 26. Sunny. High 63°17°, low 41°5°. Typical 58°14° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°11°
  Dry
Official NWS forecast
Day: Sunny, with a high near 63. Southwest wind 3 to 10 mph, with gusts as high as 21 mph.
Night: Mostly clear, with a low around 41. Northwest wind 5 to 12 mph, with gusts as high as 22 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–63°17°
Low, likely
41°5°–48°9°
Typical high / low
58°14° / 43°6°
Wind
13 mph21 km/h, gusts 22 mph35 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 52°11°, low 37°3°. Typical 58°14° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Clear, 45°7°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 52. North wind 8 to 13 mph.
Night: Mostly clear, with a low around 37. Northeast wind 2 to 7 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
52°11°–57°14°
Low, likely
37°3°–46°8°
Typical high / low
58°14° / 42°6°
Wind
20 mph32 km/h, gusts 32 mph52 km/h
UV peak
4
Wednesday, Oct 28. Mostly sunny. High 52°11°, low 40°4°. Typical 58°14° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 52°11°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 52. Northeast wind around 5 mph.
Night: Mostly clear, with a low around 40. Southeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
50°10°–52°11°
Low, likely
40°4°–46°8°
Typical high / low
58°14° / 42°6°
Wind
9 mph14 km/h, gusts 14 mph23 km/h
UV peak
4
Thursday, Oct 29. Mostly sunny. High 58°14°, low 49°9°. Typical 57°14° / 42°6°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 58°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 58. South wind 2 to 10 mph.
Night: Mostly clear, with a low around 49. Southwest wind around 9 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
55°13°–60°16°
Low, likely
45°7°–50°10°
Typical high / low
57°14° / 42°6°
Wind
17 mph28 km/h, gusts 26 mph42 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 62°17°, low 45°7°. Typical 57°14° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 62. Southwest wind around 9 mph.
Night: Mostly clear, with a low around 45. Northwest wind around 7 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
62°17°–65°18°
Low, likely
45°7°–55°13°
Typical high / low
57°14° / 42°6°
Wind
14 mph23 km/h, gusts 26 mph42 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 59°15°, low 51°11°. Typical 57°14° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°11°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
55°13°–63°17°
Low, likely
47°8°–55°13°
Typical high / low
57°14° / 41°5°
Wind
20 mph31 km/h, gusts 27 mph44 km/h
UV peak
2
Sunday, Nov 1. Partly sunny. High 60°16°, low 52°11°. Typical 56°13° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 55°13°
  30% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
52°11°–63°17°
Low, likely
47°8°–56°13°
Typical high / low
56°13° / 41°5°
Wind
15 mph24 km/h, gusts 23 mph36 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 61°16°, low 54°12°. Typical 56°13° / 41°5°. Rain 0.05 in1.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 57°14°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 60°16°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 55°13°
  20% chance · 0.03 in0.8 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
54°12°–64°18°
Low, likely
48°9°–58°14°
Typical high / low
56°13° / 41°5°
Wind
16 mph25 km/h, gusts 25 mph40 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 58°, low 30°.
Tomorrow
Dry, high 61°, low 37°, warming up.
Monday
Dry, high 63°, low 41°.
Rest of week
Mostly dry, highs 52–62°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (BOX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Atlantic Coast at Dennis Sesuit Harbor (IN MLLW)

6.3 mi

Below flood stage

Level: 11.0 ft

Forecast peak 11.1 ft Mon 12 PM

Reading from Sat 11 AM · NWS gauge page

Atlantic Coast at Chatham Harbor (IN MLLW)

13 mi

Below flood stage

Level: 6.0 ft

Forecast peak 5.8 ft Mon 12 PM

Reading from Sat 11:24 AM · NWS gauge page

Herring River at North Harwich

5.3 mi

Level: 1.7 ft
Flow: 3 cfs

Reading from Sat 10:45 AM · NWS gauge page

Atlantic Coast at Mashpee Popponesset Bay(IN MLLW)

15 mi

Level: 1.9 ft

Reading from Sat 11:30 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 68% less heating than a typical week.

This week 34Typical 104

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 24
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 13 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 39°F).

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

HYANNIS · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

On average 2°1° colder than normal (daily mean temperature).

−6°−4°SunOct 18
−8°−4°MonOct 19
−4°−2°TueOct 20
+4°+2°WedOct 21
+4°+2°ThuOct 22
+2°+1°FriOct 23
—SatOct 24

South Yarmouth weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 43 min; Losing 2 min 39 s a day; shortest Dec 21, 1 h 33 min less
Golden hour: 5:07–6:03 PM; Morning 6:45–7:41 AM
Blue hour: 6:03–6:14 PM; Morning 6:34–6:45 AM; first light 6:34 AM

Stars tonight? Fair

Clear 6:14 PM–6:36 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:12 AM · rises 4:42 PM
Full moon: Oct 26
New moon: Nov 9

Looking south from South Yarmouth. The highest point on the skyline is about 1,700 ft, 31 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.