Weather in Hyannis

14-day forecast · updated today, Wednesday, October 28, at 9:13 pm (EDT)

Now · clear 50 °F

Feels like: 45 °F
Low / high: 33 / 56 °F
Rain: 1%
Wind: 9 mph SSW

→ 30.39 inHg · steady

Today in Hyannis: overcast, 33 °F to 56 °F, with a 1% chance of rain and a gentle breeze from the south-southwest (9 mph). Tomorrow, clear sky, 51 °F to 62 °F and a 1% chance of rain. The warmest day of the week is Friday 30, at 66 °F. Next likely rain: Wednesday 4 (15%).

Measured now at the airport

Hyannis/Barnstable Muni (KHYA), 1.5 mi away · 17 min ago

Visibility9.9 mi or more

WeatherNothing to note

Temperature50 °F

Wind5 mph from the south-southwest

It's what the airport's weather station measured, not a forecast: on the coast, wind and fog can be different. Airports report every 30 or 60 minutes.

Airport METAR report, via NOAA's Aviation Weather Center (aviationweather.gov). Sources and licenses

Temperatures for the next 14 days

56° 33°
Today
62° 51°
Thu 29
66° 48°
Fri 30
52° 40°
Sat 31
55° 39°
Sun 1
60° 46°
Mon 2
59° 49°
Tue 3
59° 48°
Wed 4
59° 49°
Thu 5
59° 50°
Fri 6
56° 46°
Sat 7
54° 40°
Sun 8
56° 35°
Mon 9
55° 41°
Tue 10

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 28	Overcast	33 / 56 °F	1%	9 mph SSW	1.1 ft	1:09 am · 1:19 pm	HRRR
Thu 29	Clear sky	51 / 62 °F	1%	15 mph SW	1.8 ft	1:59 am · 2:10 pm	HRRR + NBM
Fri 30	Overcast	48 / 66 °F	7%	10 mph W	2.1 ft	2:52 am · 3:04 pm	NBM
Sat 31	Mainly clear	40 / 52 °F	0%	12 mph NNW	1.3 ft	3:50 am · 4:02 pm	NBM
Sun 1	Clear sky	39 / 55 °F	0%	7 mph WSW	1.0 ft	3:52 am · 4:07 pm	NBM
Mon 2	Mainly clear	46 / 60 °F	6%	9 mph WSW	1.0 ft	4:58 am · 5:15 pm	NBM
Tue 3	Overcast	49 / 59 °F	8%	9 mph NE	1.5 ft	6:04 am · 6:23 pm	NBM
Wed 4	Overcast	48 / 59 °F	15% · 0.42 in	11 mph SE	2.1 ft	7:06 am · 7:29 pm	NBM
Thu 5	Overcast	49 / 59 °F	28% · 0.28 in	12 mph ESE	1.6 ft	8:04 am · 8:30 pm	NBM
Fri 6	Light drizzle	50 / 59 °F	45% · 0.57 in	14 mph E	1.8 ft	8:55 am · 9:23 pm	NBM
Sat 7	Light rain	46 / 56 °F	33% · 0.20 in	11 mph SW	4.2 ft	9:40 am · 10:11 pm	NBM
Sun 8	Light drizzle	40 / 54 °F	22% · 0.08 in	12 mph NW	4.0 ft	10:21 am · 10:55 pm	NBM + ECMWF
Mon 9	Clear sky	35 / 56 °F	23%	6 mph NW	1.4 ft	11:00 am · 11:36 pm	ECMWF
Tue 10	Overcast	41 / 55 °F	14%	8 mph NE	1.3 ft	11:38 am	ECMWF

Each hour comes from the best model for this spot: HRRR until Thursday 29 4:00 pm; then NBM until Sunday 8 2:00 pm; then ECMWF until Thursday 12 10:00 am; then GFS.

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Mainly clear	Clear	Clear	Partly cloudy	Overcast	Partly cloudy	Partly cloudy	Mainly clear
Temperature	35°	34°	33°	44°	56°	55°	50°	50°
Chance of rain	0%	0%	0%	0%	0%	0%	0%	0%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in
Wind (mph)	0 NNW	1 E	4 NNW	2 NE	6 SSE	9 S	8 SSW	8 SSW
Humidity	76%	73%	73%	87%	57%	49%	68%	73%
UV	0	0	0	1	3	1	0	0
Model	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR

Do the models agree?

High confidence

The models agree for the next few days: the forecast is fairly solid.

What 6 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	56°	64°	69°	52°	55°	61°	66°
AIFS	56°	62°	67°	52°	54°	63°	66°
GFS	53°	60°	68°	51°	55°	60°	58°
ICON	55°	63°	67°	50°	56°	62°	58°
HRRR	56°	62°	—	—	—	—	—
NBM	55°	62°	66°	52°	55°	60°	59°
Confidence	high	high	high	high	high	high	medium

Do the models agree? · Rain
Rain	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	0	0	0	0	0	0	0
AIFS	0	0	0.02 in	0	0	0	0
GFS	0	0	0.01 in	0	0	0	0
ICON	0	0	0.01 in	0	0	0	0
HRRR	0	0	—	—	—	—	—
NBM	0	0	0	0	0	0	0
Confidence	high	high	high	high	high	high	high

Do the models agree? · Wind
Wind (mph)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	615	1430	1223	1226	824	826	1022
AIFS	8	13	14	13	8	13	14
GFS	1115	1730	1932	1724	1318	1828	1525
ICON	511	1022	1021	1123	919	1124	1430
HRRR	915	1526	—	—	—	—	—
NBM	611	1220	1021	1221	713	915	915
Confidence	high	high	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF (51 scenarios)	0%	0%	14%	0%	2%	2%	7%
GFS (GEFS, 31 scenarios)	0%	0%	7%	0%	0%	16%	27%
NBM (NOAA)	1%	1%	7%	0%	0%	6%	8%
Thunderstorm (NBM)	0%	0%	2%	0%	0%	1%	1%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: a bit warmer, normal rain and a slightly warmer sea.

Next 6 weeks

When	TemperatureTemp.	Rain	Sea	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	Above +3.2 °F	Normal	Normal 0.0 °F	—
Nov 9 – Nov 15Nov 9–Nov 15	A bit above +1.1 °F	Normal	A bit above +0.9 °F	52° / 49°
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +1.6 °F	Normal	A bit above +1.1 °F	51° / 48°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +2.0 °F	A bit above +33%	A bit above +1.3 °F	49° / 47°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +1.8 °F	Normal	A bit above +1.3 °F	47° / 44°

Coming months

When	TemperatureTemp.	Rain	Sea
November	A bit above +1.4 °F	Normal	A bit above +1.1 °F
December	Above +2.9 °F	Normal	Above +2.0 °F
January	Above +3.8 °F	A bit above +30%	Above +2.9 °F
February	Above +3.4 °F	Normal	Above +3.1 °F
March	Above +2.9 °F	Normal	Above +2.5 °F

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give.

Hyannis climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Hyannis is from June to September: highs of 72 °F to 80 °F, about 9 rainy days a month and 7 hours of sunshine a day.

Hurricane season: from July to August, peaking in July. In the last 30 years (1996–2025), 9 tropical cyclones passed within 93 mi of Hyannis, about 3 every 10 years; one of them with hurricane-force winds (74 mph or more). The most recent: Henri, in August 2021.

38° 23°

JanJ
40° 24°

FebF
46° 31°

MarM
55° 40°

AprA
64° 49°

MayM
73° 58°

JunJ
80° 65°

JulJ
78° 64°

AugA
72° 57°

SepS
62° 47°

OctO
52° 38°

NovN
44° 29°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	38°	23°	3.85 in	9	3.2	40°	3.7 ft	–
FebruaryFeb	40°	24°	3.51 in	8	4.7	37°	3.5 ft	–
MarchMar	46°	31°	4.17 in	9	5.1	38°	3.5 ft	–
AprilApr	55°	40°	4.26 in	9	5.8	43°	3.3 ft	–
MayMay	64°	49°	3.79 in	9	6.6	51°	2.7 ft	–
JuneJun	73°	58°	3.60 in	9	7.1	59°	2.3 ft	–
JulyJul	80°	65°	2.82 in	9	7.9	67°	2.2 ft	5
AugustAug	78°	64°	3.43 in	9	7.2	69°	2.2 ft	3
SeptemberSep	72°	57°	3.81 in	8	6.0	66°	2.7 ft	1
OctoberOct	62°	47°	4.57 in	9	4.6	59°	3.2 ft	–
NovemberNov	52°	38°	4.66 in	8	3.4	51°	3.5 ft	–
DecemberDec	44°	29°	4.67 in	10	2.9	45°	3.5 ft	–

Month	Water	Waves	Cyclones
Jan	40°	3.7 ft	–
Feb	37°	3.5 ft	–
Mar	38°	3.5 ft	–
Apr	43°	3.3 ft	–
May	51°	2.7 ft	–
Jun	59°	2.3 ft	–
Jul	67°	2.2 ft	5
Aug	69°	2.2 ft	3
Sep	66°	2.7 ft	1
Oct	59°	3.2 ft	–
Nov	51°	3.5 ft	–
Dec	45°	3.5 ft	–

Days: rainy days in the month. Sun: hours a day.

A normal year brings 47.14 in of rain on about 105 days and about 1,950 hours of sunshine.

Cyclones: how many tropical cyclones (tropical storms, hurricanes and typhoons) passed within 93 mi in each month from 1996 to 2025, according to IBTrACS (NOAA).

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now50 °Ffeels like 45 °F

Tomorrow51 / 62 °F

It's 50 °F now (feels like 45 °F). Today, 33 °F to 56 °F; tomorrow, 51 °F to 62 °F.

Chance of rain

Today 1%
Thu 29 1%
Fri 30 7%
Sat 31 0%
Sun 1 0%
Mon 2 6%
Tue 3 8%

Today the chance of rain reaches 1%. The next day with likely rain is Wednesday 4: 15% and 0.42 in.

No rain in the last 7 days.

Humidity and dew point

Humidity73%

Dew point42 °F

Humidity is 73% now and the dew point is 42 °F.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now13 migood

Clouds13%

Visibility is good now (13 mi). No fog expected today.

UV index

Now0

Today's peak3moderate

Thu 29: 3 · Fri 30: 3 · Sat 31: 3

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising Anglers say fish bite less for a while
→ Steady · now Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

30.0030.2030.40 29.94

Steady now (−0.03 inHg in 3 hours). Over the next 48 hours: −0.28 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityGood · 33

Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Max wind
Tue 27	Mainly clear	42 / 57 °F	12 mph NNE
Mon 26	Clear sky	42 / 65 °F	11 mph WSW
Sun 25	Partly cloudy	35 / 65 °F	7 mph SSW
Sat 24	Clear sky	37 / 58 °F	6 mph NNW
Fri 23	Clear sky	44 / 55 °F	19 mph NNE
Thu 22	Overcast	53 / 57 °F	21 mph N
Wed 21	Overcast	53 / 56 °F	21 mph NE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Tue 20	Overcast	50 / 58 °F	0	18 mph NNE
Mon 19	Overcast	40 / 57 °F	0	11 mph NE
Sun 18	Mainly clear	41 / 53 °F	0	11 mph NNE
Sat 17	Drizzle	45 / 63 °F	0.24 in	15 mph NNW
Fri 16	Heavy drizzle	46 / 67 °F	0.45 in	16 mph SSW
Thu 15	Partly cloudy	46 / 62 °F	0	15 mph N
Wed 14	Overcast	62 / 80 °F	0	12 mph WSW
Tue 13	Drizzle	56 / 62 °F	0.09 in	12 mph ESE
Mon 12	Light rain	56 / 66 °F	0.24 in	14 mph NNE
Sun 11	Rain	46 / 59 °F	0.84 in	12 mph ESE
Sat 10	Overcast	49 / 63 °F	0	9 mph NNW
Fri 9	Overcast	51 / 68 °F	0	13 mph W
Thu 8	Light drizzle	56 / 72 °F	0.01 in	17 mph WSW
Wed 7	Mainly clear	42 / 63 °F	0	11 mph SW
Tue 6	Clear sky	47 / 62 °F	0	9 mph WNW
Mon 5	Light drizzle	54 / 70 °F	0.01 in	14 mph WNW
Sun 4	Light drizzle	54 / 65 °F	0.06 in	10 mph ENE
Sat 3	Light drizzle	55 / 65 °F	0.02 in	11 mph NNE
Fri 2	Drizzle	65 / 76 °F	0.09 in	13 mph SW
Thu 1	Overcast	58 / 74 °F	0	12 mph SW
Wed 30	Light drizzle	59 / 67 °F	0.02 in	6 mph SW
Tue 29	Overcast	56 / 64 °F	0	8 mph NW
Mon 28	Light rain	61 / 67 °F	0.58 in	13 mph NE

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in HyannisQuestions

What's the weather like today in Hyannis?

Overcast, from 33 °F to 56 °F, with a gentle breeze from the south-southwest (9 mph) and a 1% chance of rain.

Will it rain tomorrow in Hyannis?

On Thursday 29 the chance of rain is 1% (0.00 in): clear sky.

How warm will it be this week?

Between a low of 33 °F and a high of 66 °F; the warmest day, Friday 30.

What's the UV index today?

It reaches 3 (moderate). Hat, sunglasses and sunscreen around midday.

Is the pressure rising or falling?

It's 30.39 inHg and steady: −0.00 inHg over the last 24 hours.

When is the best time to visit Hyannis?

The best time to visit Hyannis is from June to September: highs of 72 °F to 80 °F, about 9 rainy days a month and 7 hours of sunshine a day.

What is the weather like in Hyannis in October?

In October, Hyannis normally sees highs of 62 °F and lows of 47 °F, with about 9 rainy days (4.57 in for the month) and 5 hours of sunshine a day. The sea is around 59 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Hyannis?

The warmest is July, with average highs of 80 °F, and the coldest January, with lows of 23 °F. The wettest is December (4.67 in) and the driest, July.

When is hurricane season in Hyannis?

Hurricane season: from July to August, peaking in July. In the last 30 years (1996–2025), 9 tropical cyclones passed within 93 mi of Hyannis, about 3 every 10 years; one of them with hurricane-force winds (74 mph or more). The most recent: Henri, in August 2021.

More about Hyannis today

Weather near Hyannis

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 13 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 9:13 pm (local time).

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