Weather in Hachijō

14-day forecast · updated today, Thursday, October 29, at 4:08 pm (GMT+9)

Now · drizzle 71 °F

Feels like: 68 °F
Low / high: 69 / 73 °F
Rain: 98% · 0.35 in
Wind: 17 mph SSE

→ 30.22 inHg · steady

Today in Hachijō: drizzle, 69 °F to 73 °F, with a 98% chance of rain (0.35 in) and a moderate breeze from the south-southeast (17 mph). Tomorrow, rain, 71 °F to 76 °F and a 100% chance of rain. The warmest day of the week is Monday 2, at 78 °F.

Temperatures for the next 14 days

73° 69°
Today
76° 71°
Fri 30
76° 71°
Sat 31
71° 70°
Sun 1
78° 70°
Mon 2
78° 71°
Tue 3
74° 71°
Wed 4
73° 71°
Thu 5
73° 71°
Fri 6
71° 69°
Sat 7
71° 69°
Sun 8
69° 66°
Mon 9
67° 64°
Tue 10
66° 64°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Drizzle	69 / 73 °F	98% · 0.35 in	18 mph SSE	6.4 ft	7:46 am · 5:58 pm	ECMWF
Fri 30	Rain	71 / 76 °F	100% · 1.79 in	26 mph SSW	8.1 ft	8:45 am · 6:29 pm	ECMWF
Sat 31	Light rain	71 / 76 °F	88% · 0.24 in	31 mph WNW	9.6 ft	9:57 am · 7:03 pm	ECMWF
Sun 1	Mainly clear	70 / 71 °F	2%	31 mph NW	9.8 ft	11:30 am · 7:48 pm	ECMWF
Mon 2	Overcast	70 / 78 °F	20%	34 mph WSW	7.6 ft	1:00 pm · 9:44 pm	ECMWF
Tue 3	Heavy drizzle	71 / 78 °F	51% · 0.13 in	33 mph WNW	8.5 ft	1:48 pm	ECMWF
Wed 4	Drizzle	71 / 74 °F	67% · 0.07 in	13 mph ENE	6.4 ft	12:36 am · 2:20 pm	ECMWF
Thu 5	Light rain	71 / 73 °F	80% · 1.09 in	17 mph NNE	7.5 ft	2:08 am · 2:46 pm	ECMWF
Fri 6	Overcast	71 / 73 °F	62%	32 mph NW	9.5 ft	3:13 am · 3:11 pm	ECMWF
Sat 7	Light drizzle	69 / 71 °F	29% · 0.12 in	29 mph NE	11 ft	4:06 am · 3:34 pm	ECMWF
Sun 8	Drizzle	69 / 71 °F	33% · 0.16 in	26 mph E	10.0 ft	4:52 am · 3:58 pm	ECMWF
Mon 9	Heavy drizzle	66 / 69 °F	43% · 0.28 in	29 mph NNW	8.4 ft	5:34 am · 4:21 pm	ECMWF
Tue 10	Heavy drizzle	64 / 67 °F	43% · 0.20 in	27 mph WNW	8.3 ft	6:13 am · 4:45 pm	ECMWF
Wed 11	Partly cloudy	64 / 66 °F	34%	29 mph WNW	8.9 ft	6:51 am · 5:10 pm	ECMWF

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	Light drizzle	Light drizzle	Light drizzle	Light drizzle	Light drizzle	Light drizzle	Drizzle	Light drizzle
Temperature	71°	70°	69°	70°	70°	71°	73°	73°
Chance of rain	92%	80%	69%	94%	94%	98%	96%	94%
Rain	0.01 in	0.01 in	0.01 in	0.00 in	0.02 in	0.02 in	0.02 in	0.02 in
Wind (mph)	11 ESE	10 SE	6 ENE	15 ESE	15 SSE	17 SSE	17 S	16 S
Humidity	61%	68%	71%	69%	70%	74%	70%	71%
UV	0	0	0	3	3	1	0	0
Model	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF

Do the models agree?

Medium confidence

They broadly agree, but not quite on wind tomorrow: take it with some caution.

What 4 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	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	73°	76°	76°	71°	78°	78°	74°
AIFS	72°	75°	74°	72°	76°	75°	74°
GFS	73°	76°	75°	73°	75°	75°	74°
ICON	72°	76°	76°	73°	76°	76°	73°
Confidence	high	high	high	high	high	high	high

Do the models agree? · Rain
Rain	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	0.35 in	1.79 in	0.24 in	0	0	0.13 in	0.07 in
AIFS	0.44 in	1.76 in	0.24 in	0	0.04 in	0.08 in	0.09 in
GFS	0.50 in	0.79 in	0.09 in	0	0	0.10 in	0.16 in
ICON	0.30 in	1.88 in	0.41 in	0	0	0.02 in	0
Confidence	high	high	medium	high	medium	medium	medium

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	1826	2639	3141	3142	3436	3343	1333
AIFS	19	21	28	27	26	18	11
GFS	2521	3237	3535	3334	3135	3036	2539
ICON	1926	2333	2943	2740	1824	2637	2942
Confidence	high	medium	high	high	low	low	low

Chance of rain from the ensemble models

Model	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF (51 scenarios)	98%	100%	88%	2%	20%	51%	67%
GFS (GEFS, 31 scenarios)	97%	100%	83%	23%	23%	28%	61%

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.

The next few weeks look normal for the time of year.

Next 6 weeks

When	TemperatureTemp.	Rain	Sea	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	A bit above +0.9 °F	A bit above +35%	Normal +0.2 °F	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal −0.7 °F	Normal	A bit below −1.3 °F	—
Nov 16 – Nov 22Nov 16–Nov 22	Normal +0.2 °F	Normal	A bit below −1.3 °F	68° / 66°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +1.4 °F	A bit above +22%	A bit above +1.1 °F	67° / 65°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +2.0 °F	Normal	Above +2.2 °F	66° / 64°

Coming months

When	TemperatureTemp.	Rain	Sea
November	A bit above +2.2 °F	Normal	A bit above +0.7 °F
December	A bit above +2.2 °F	Normal	A bit above +0.5 °F
January	A bit above +2.2 °F	Normal	Normal +0.2 °F
February	A bit above +2.5 °F	Normal	Normal −0.4 °F
March	A bit above +1.8 °F	Normal	A bit below −0.5 °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.

Hachijō climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Hachijō is from July to August and in May: highs of 71 °F to 83 °F, about 15 rainy days a month and 6 hours of sunshine a day.

Typhoon season: from August to October, peaking in August. In the last 30 years (1996–2025), 37 tropical cyclones passed within 93 mi of Hachijō, one or two a year; 19 of them with hurricane-force winds (74 mph or more). The most recent: Halong, in October 2025.

58° 48°

JanJ
58° 47°

FebF
61° 50°

MarM
67° 56°

AprA
71° 62°

MayM
75° 67°

JunJ
81° 73°

JulJ
83° 74°

AugA
81° 72°

SepS
75° 66°

OctO
69° 60°

NovN
62° 52°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	58°	48°	5.41 in	10	2.7	68°	8.7 ft	–
FebruaryFeb	58°	47°	5.78 in	10	2.8	66°	8.3 ft	–
MarchMar	61°	50°	7.68 in	14	3.9	66°	7.9 ft	–
AprilApr	67°	56°	7.50 in	12	4.9	68°	6.8 ft	–
MayMay	71°	62°	8.94 in	13	5.4	71°	5.6 ft	1
JuneJun	75°	67°	12.25 in	17	3.5	74°	5.8 ft	1
JulyJul	81°	73°	7.33 in	16	4.9	79°	5.5 ft	6
AugustAug	83°	74°	6.97 in	14	6.4	82°	6.0 ft	11
SeptemberSep	81°	72°	11.88 in	17	4.5	81°	6.9 ft	8
OctoberOct	75°	66°	12.71 in	16	3.6	78°	8.0 ft	10
NovemberNov	69°	60°	9.25 in	12	3.4	74°	7.1 ft	–
DecemberDec	62°	52°	6.04 in	11	3.0	70°	8.1 ft	–

Month	Water	Waves	Cyclones
Jan	68°	8.7 ft	–
Feb	66°	8.3 ft	–
Mar	66°	7.9 ft	–
Apr	68°	6.8 ft	–
May	71°	5.6 ft	1
Jun	74°	5.8 ft	1
Jul	79°	5.5 ft	6
Aug	82°	6.0 ft	11
Sep	81°	6.9 ft	8
Oct	78°	8.0 ft	10
Nov	74°	7.1 ft	–
Dec	70°	8.1 ft	–

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

A normal year brings 101.74 in of rain on about 163 days and about 1,500 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

Now71 °Ffeels like 68 °F

Tomorrow71 / 76 °F

It's 71 °F now (feels like 68 °F). Today, 69 °F to 73 °F; tomorrow, 71 °F to 76 °F.

Chance of rain

Today 98% 0.35 in
Fri 30 100% 1.79 in
Sat 31 88% 0.24 in
Sun 1 2%
Mon 2 20%
Tue 3 51% 0.13 in
Wed 4 67% 0.07 in

Today the chance of rain reaches 98%, with 0.35 in in total. The next day with likely rain is Friday 30: 100% and 1.79 in.

Recent rain: last 24 hours, 0.28 in; last 3 days, 1.17 in; last 7 days, 1.50 in.

Humidity and dew point

Humidity73%

Dew point62 °F

Humidity is 73% now and the dew point is 62 °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

Now11 migood

Clouds68%

Visibility is good now (11 mi). No fog expected today.

UV index

Now0

Today's peak4moderate

Fri 30: 6 · Sat 31: 6 · Sun 1: 5

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

30.0030.20 29.89

Steady now (−0.01 inHg in 3 hours). Over the next 48 hours: −0.27 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityFair · 36

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	Rain	Max wind
Wed 28	Light drizzle	69 / 75 °F	0.08 in	34 mph NW
Tue 27	Light rain	75 / 80 °F	0.66 in	32 mph W
Mon 26	Heavy drizzle	77 / 79 °F	0.35 in	29 mph SW
Sun 25	Light drizzle	78 / 79 °F	0.00 in	24 mph SW
Sat 24	Light drizzle	76 / 78 °F	0.11 in	25 mph SE
Fri 23	Light drizzle	74 / 76 °F	0.08 in	33 mph E
Thu 22	Drizzle	75 / 79 °F	0.12 in	28 mph WNW

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Light drizzle	78 / 79 °F	0.08 in	28 mph SW
Tue 20	Light drizzle	78 / 79 °F	0.06 in	20 mph SSW
Mon 19	Overcast	75 / 79 °F	0	17 mph S
Sun 18	Partly cloudy	72 / 75 °F	0	26 mph E
Sat 17	Light drizzle	74 / 78 °F	0.01 in	27 mph ENE
Fri 16	Overcast	74 / 76 °F	0	15 mph NW
Thu 15	Mainly clear	74 / 77 °F	0	21 mph NW
Wed 14	Light drizzle	77 / 79 °F	0.04 in	22 mph W
Tue 13	Light drizzle	76 / 78 °F	0.10 in	30 mph NE
Mon 12	Light drizzle	76 / 77 °F	0.19 in	31 mph NNE
Sun 11	Light drizzle	76 / 78 °F	0.03 in	28 mph NNE
Sat 10	Overcast	74 / 77 °F	0	26 mph NE
Fri 9	Overcast	74 / 76 °F	0	24 mph ENE
Thu 8	Drizzle	74 / 77 °F	0.15 in	28 mph ENE
Wed 7	Drizzle	73 / 77 °F	0.14 in	21 mph N
Tue 6	Light drizzle	78 / 80 °F	0.02 in	31 mph N
Mon 5	Light drizzle	78 / 80 °F	0.01 in	27 mph NE
Sun 4	Overcast	75 / 78 °F	0	32 mph ENE
Sat 3	Drizzle	76 / 80 °F	0.15 in	34 mph ENE
Fri 2	Partly cloudy	78 / 80 °F	0	18 mph NW
Thu 1	Thunderstorm	78 / 81 °F	0.19 in	23 mph WNW
Wed 30	Thunderstorm	76 / 80 °F	2.32 in	25 mph E
Tue 29	Heavy drizzle	77 / 82 °F	0.22 in	21 mph SSW

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 HachijōQuestions

What's the weather like today in Hachijō?

Drizzle, from 69 °F to 73 °F, with a moderate breeze from the south-southeast (17 mph) and a 98% chance of rain.

Will it rain tomorrow in Hachijō?

On Friday 30 the chance of rain is 100% (1.79 in): rain.

How warm will it be this week?

Between a low of 69 °F and a high of 78 °F; the warmest day, Monday 2.

What's the UV index today?

It reaches 4 (moderate). Hat, sunglasses and sunscreen around midday.

Is the pressure rising or falling?

It's 30.22 inHg and steady: +0.19 inHg over the last 24 hours.

When is the best time to visit Hachijō?

The best time to visit Hachijō is from July to August and in May: highs of 71 °F to 83 °F, about 15 rainy days a month and 6 hours of sunshine a day.

What is the weather like in Hachijō in October?

In October, Hachijō normally sees highs of 75 °F and lows of 66 °F, with about 16 rainy days (12.71 in for the month) and 4 hours of sunshine a day. The sea is around 78 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Hachijō?

The warmest is August, with average highs of 83 °F, and the coldest February, with lows of 47 °F. The wettest is October (12.71 in) and the driest, January.

When is typhoon season in Hachijō?

Typhoon season: from August to October, peaking in August. In the last 30 years (1996–2025), 37 tropical cyclones passed within 93 mi of Hachijō, one or two a year; 19 of them with hurricane-force winds (74 mph or more). The most recent: Halong, in October 2025.

More about Hachijō today

Weather near Hachijō

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 7.3 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 4:08 pm (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from