Weather in Ōshima

14-day forecast · updated today, Thursday, October 29, at 10:01 pm (GMT+9)

Now · partly cloudy 66 °F

Feels like: 66 °F
Low / high: 62 / 67 °F
Rain: 22%
Wind: 8 mph NNE

→ 30.22 inHg · steady

Today in Ōshima: partly cloudy, 62 °F to 67 °F, with a 22% chance of rain and a gentle breeze from the north-northeast (8 mph). Tomorrow, overcast, 66 °F to 72 °F and a 33% chance of rain. The warmest day of the week is Monday 2, at 73 °F. Next likely rain: Saturday 31 (49%).

Temperatures for the next 14 days

67° 62°
Today
72° 66°
Fri 30
72° 67°
Sat 31
69° 64°
Sun 1
73° 65°
Mon 2
71° 67°
Tue 3
68° 65°
Wed 4
68° 65°
Thu 5
73° 68°
Fri 6
67° 63°
Sat 7
62° 59°
Sun 8
61° 58°
Mon 9
62° 59°
Tue 10
60° 57°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Partly cloudy	62 / 67 °F	22%	22 mph NNE	4.9 ft	7:06 am · 5:27 pm	ECMWF
Fri 30	Overcast	66 / 72 °F	33%	20 mph SW	5.1 ft	8:02 am · 5:59 pm	ECMWF
Sat 31	Overcast	67 / 72 °F	49%	23 mph W	5.8 ft	9:07 am · 6:35 pm	ECMWF
Sun 1	Light drizzle	64 / 69 °F	22% · 0.02 in	19 mph NE	5.2 ft	10:35 am · 7:22 pm	ECMWF
Mon 2	Rain	65 / 73 °F	77% · 0.67 in	35 mph SW	6.6 ft	12:15 pm · 9:03 pm	ECMWF
Tue 3	Rain	67 / 71 °F	67% · 0.31 in	16 mph NE	5.9 ft	1:09 pm · 11:51 pm	ECMWF
Wed 4	Light drizzle	65 / 68 °F	43% · 0.07 in	29 mph NNE	6.7 ft	1:41 pm	ECMWF
Thu 5	Drizzle	65 / 68 °F	81% · 0.17 in	27 mph NNE	6.3 ft	1:33 am · 2:07 pm	ECMWF
Fri 6	Light drizzle	68 / 73 °F	50% · 0.05 in	32 mph WSW	7.6 ft	2:40 am · 2:31 pm	ECMWF
Sat 7	Light drizzle	63 / 67 °F	15% · 0.01 in	26 mph NE	6.0 ft	3:33 am · 2:55 pm	ECMWF
Sun 8	Light drizzle	59 / 62 °F	25% · 0.06 in	27 mph NNE	5.4 ft	4:19 am · 3:19 pm	ECMWF
Mon 9	Light drizzle	58 / 61 °F	35% · 0.20 in	32 mph NNE	7.5 ft	5:01 am · 3:42 pm	ECMWF
Tue 10	Light drizzle	59 / 62 °F	32% · 0.05 in	28 mph NNE	7.2 ft	5:41 am · 4:07 pm	ECMWF
Wed 11	Light drizzle	57 / 60 °F	26% · 0.02 in	20 mph ENE	5.8 ft	6:20 am · 4:31 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	Partly cloudy	Clear	Clear	Clear sky	Clear sky	Mainly clear	Clear	Clear
Temperature	63°	62°	62°	62°	64°	65°	66°	67°
Chance of rain	0%	0%	0%	2%	16%	22%	10%	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)	22 NNE	22 NNE	22 NNE	21 NNE	20 NNE	16 NNE	12 NNE	9 N
Humidity	63%	67%	71%	74%	71%	75%	75%	80%
UV	0	0	0	2	3	1	0	0
Model	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF

Do the models agree?

Low confidence

They don't agree on rain on Saturday 31: it may change, so check again closer to the day.

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	67°	72°	72°	69°	73°	71°	68°
AIFS	65°	70°	70°	68°	68°	67°	65°
GFS	66°	73°	72°	69°	73°	68°	68°
ICON	64°	71°	71°	69°	71°	70°	64°
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	0	0	0.02 in	0.67 in	0.31 in	0.07 in
AIFS	0.05 in	0.09 in	0.13 in	0	0.43 in	0.02 in	0.28 in
GFS	0.00 in	0.02 in	0	0.02 in	0.99 in	0.06 in	0.52 in
ICON	0	0.02 in	0.27 in	0.00 in	0.02 in	0.00 in	0
Confidence	medium	medium	low	high	medium	low	medium

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	2232	2027	2332	1927	3549	1649	2944
AIFS	22	15	19	12	13	13	23
GFS	2120	2528	3032	2520	3440	1717	3437
ICON	1330	1935	1942	1530	2044	2146	1937
Confidence	medium	medium	medium	medium	low	medium	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)	22%	33%	49%	22%	77%	67%	43%
GFS (GEFS, 31 scenarios)	11%	50%	35%	32%	77%	56%	58%

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 warmer sea.

Next 6 weeks

When	TemperatureTemp.	Rain	Sea	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	Normal +0.5 °F	A bit above +31%	Above +3.1 °F	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal +0.4 °F	Normal	Above +2.2 °F	—
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +1.4 °F	Normal	Above +2.3 °F	65° / 62°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +2.3 °F	Normal	Above +2.7 °F	64° / 61°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +2.2 °F	Normal	Above +2.0 °F	62° / 59°

Coming months

When	TemperatureTemp.	Rain	Sea
November	Above +3.4 °F	A bit above +35%	Well above +4.0 °F
December	Above +2.7 °F	A bit above +47%	Above +3.1 °F
January	Above +2.7 °F	Normal	Above +2.5 °F
February	Above +3.4 °F	A bit above +20%	Above +2.7 °F
March	Above +3.1 °F	Normal	Above +2.7 °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.

Ōshima climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Ōshima is from July to August and in May: highs of 70 °F to 83 °F, about 12 rainy days a month and 6 hours of sunshine a day.

Typhoon season: from July to October, peaking in September. In the last 30 years (1996–2025), 35 tropical cyclones passed within 93 mi of Ōshima, one or two a year; 16 of them with hurricane-force winds (74 mph or more). The most recent: Peipah, in September 2025.

52° 39°

JanJ
52° 38°

FebF
57° 43°

MarM
64° 51°

AprA
70° 58°

MayM
74° 64°

JunJ
81° 71°

JulJ
83° 73°

AugA
79° 68°

SepS
71° 60°

OctO
64° 52°

NovN
56° 43°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	52°	39°	3.29 in	5	5.2	62°	3.5 ft	–
FebruaryFeb	52°	38°	3.90 in	6	5.2	60°	3.7 ft	–
MarchMar	57°	43°	6.25 in	9	5.8	61°	3.9 ft	–
AprilApr	64°	51°	6.27 in	9	5.8	63°	3.7 ft	–
MayMay	70°	58°	7.26 in	10	5.8	66°	3.2 ft	–
JuneJun	74°	64°	9.96 in	13	4.3	71°	3.1 ft	3
JulyJul	81°	71°	6.80 in	14	5.7	75°	3.3 ft	8
AugustAug	83°	73°	6.53 in	12	7.1	79°	3.6 ft	6
SeptemberSep	79°	68°	9.01 in	13	5.1	78°	3.7 ft	11
OctoberOct	71°	60°	9.42 in	10	4.2	74°	4.0 ft	7
NovemberNov	64°	52°	5.76 in	7	4.2	70°	3.4 ft	–
DecemberDec	56°	43°	3.65 in	5	4.6	66°	3.6 ft	–

Month	Water	Waves	Cyclones
Jan	62°	3.5 ft	–
Feb	60°	3.7 ft	–
Mar	61°	3.9 ft	–
Apr	63°	3.7 ft	–
May	66°	3.2 ft	–
Jun	71°	3.1 ft	3
Jul	75°	3.3 ft	8
Aug	79°	3.6 ft	6
Sep	78°	3.7 ft	11
Oct	74°	4.0 ft	7
Nov	70°	3.4 ft	–
Dec	66°	3.6 ft	–

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

A normal year brings 78.12 in of rain on about 113 days and about 1,900 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

Now66 °Ffeels like 66 °F

Tomorrow66 / 72 °F

It's 66 °F now (feels like 66 °F). Today, 62 °F to 67 °F; tomorrow, 66 °F to 72 °F.

Chance of rain

Today 22%
Fri 30 33%
Sat 31 49%
Sun 1 22% 0.02 in
Mon 2 77% 0.67 in
Tue 3 67% 0.31 in
Wed 4 43% 0.07 in

Today the chance of rain reaches 22%. The next day with likely rain is Saturday 31: 49% and 0.00 in.

Recent rain: last 24 hours, 0.00 in; last 3 days, 0.53 in; last 7 days, 4.13 in.

Humidity and dew point

Humidity81%

Dew point60 °F

Humidity is 81% now and the dew point is 60 °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

Now15 migood

Clouds74%

Visibility is good now (15 mi). No fog expected today.

The model gives visibility up to about 15 mi: beyond that, the horizon is clear.

UV index

Now0

Today's peak3low

Fri 30: 4 · Sat 31: 5 · Sun 1: 4

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

29.8030.0030.2030.40 29.81

Steady now (−0.03 inHg in 3 hours). Over the next 48 hours: −0.26 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityModerate · 47

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	64 / 71 °F	0.04 in	25 mph NE
Tue 27	Heavy drizzle	68 / 73 °F	0.44 in	29 mph NNE
Mon 26	Rain	70 / 73 °F	2.44 in	29 mph NE
Sun 25	Light rain	71 / 78 °F	0.52 in	33 mph SW
Sat 24	Light rain	69 / 72 °F	0.68 in	21 mph NNE
Fri 23	Light drizzle	65 / 73 °F	0.02 in	26 mph NE
Thu 22	Light drizzle	69 / 78 °F	0.00 in	25 mph NE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Light showers	76 / 79 °F	0.34 in	34 mph SW
Tue 20	Light drizzle	76 / 77 °F	0.05 in	22 mph SW
Mon 19	Overcast	73 / 76 °F	0	19 mph SW
Sun 18	Overcast	70 / 75 °F	0	13 mph E
Sat 17	Overcast	72 / 75 °F	0	22 mph NE
Fri 16	Light drizzle	70 / 75 °F	0.03 in	17 mph N
Thu 15	Light drizzle	70 / 74 °F	0.07 in	22 mph NE
Wed 14	Drizzle	74 / 77 °F	0.08 in	27 mph WSW
Tue 13	Mainly clear	71 / 76 °F	0	23 mph NNE
Mon 12	Partly cloudy	72 / 76 °F	0	26 mph NNE
Sun 11	Clear sky	71 / 78 °F	0	21 mph NNE
Sat 10	Mainly clear	71 / 76 °F	0	22 mph NNE
Fri 9	Light drizzle	72 / 75 °F	0.01 in	18 mph NE
Thu 8	Light drizzle	70 / 75 °F	0.00 in	25 mph NE
Wed 7	Light drizzle	73 / 76 °F	0.01 in	21 mph ENE
Tue 6	Overcast	74 / 79 °F	0	22 mph NNE
Mon 5	Overcast	72 / 75 °F	0	29 mph NNE
Sun 4	Overcast	71 / 75 °F	0	26 mph NE
Sat 3	Light drizzle	71 / 74 °F	0.01 in	26 mph NE
Fri 2	Light rain	73 / 78 °F	0.38 in	24 mph NNE
Thu 1	Light drizzle	73 / 79 °F	0.02 in	28 mph N
Wed 30	Rain	70 / 73 °F	0.75 in	30 mph NNE
Tue 29	Rain	70 / 79 °F	0.74 in	20 mph NNE

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 ŌshimaQuestions

What's the weather like today in Ōshima?

Partly cloudy, from 62 °F to 67 °F, with a gentle breeze from the north-northeast (8 mph) and a 22% chance of rain.

Will it rain tomorrow in Ōshima?

On Friday 30 the chance of rain is 33% (0.00 in): overcast.

How warm will it be this week?

Between a low of 62 °F and a high of 73 °F; the warmest day, Monday 2.

What's the UV index today?

It reaches 3 (low). No special protection needed.

Is the pressure rising or falling?

It's 30.22 inHg and steady: +0.01 inHg over the last 24 hours.

When is the best time to visit Ōshima?

The best time to visit Ōshima is from July to August and in May: highs of 70 °F to 83 °F, about 12 rainy days a month and 6 hours of sunshine a day.

What is the weather like in Ōshima in October?

In October, Ōshima normally sees highs of 71 °F and lows of 60 °F, with about 10 rainy days (9.42 in for the month) and 4 hours of sunshine a day. The sea is around 74 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Ōshima?

The warmest is August, with average highs of 83 °F, and the coldest February, with lows of 38 °F. The wettest is June (9.96 in) and the driest, January.

When is typhoon season in Ōshima?

Typhoon season: from July to October, peaking in September. In the last 30 years (1996–2025), 35 tropical cyclones passed within 93 mi of Ōshima, one or two a year; 16 of them with hurricane-force winds (74 mph or more). The most recent: Peipah, in September 2025.

More about Ōshima today

Weather near Ōshima

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 6.4 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 10:01 pm (local time).

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