Weather in Oshima

14-day forecast · updated today, Thursday, October 29, at 2:32 pm (GMT+9)

Now · overcast 61 °F

Feels like: 57 °F
Low / high: 49 / 66 °F
Rain: 0%
Wind: 7 mph SW

↘ 30.19 inHg · falling

Today in Oshima: overcast, 49 °F to 66 °F, with a 0% chance of rain and a light breeze from the southwest (7 mph). Tomorrow, rain, 61 °F to 65 °F and a 100% chance of rain. The warmest day of the week is Thursday 29, at 66 °F.

Temperatures for the next 14 days

66° 49°
Today
65° 61°
Fri 30
63° 55°
Sat 31
60° 53°
Sun 1
63° 59°
Mon 2
63° 54°
Tue 3
62° 54°
Wed 4
65° 59°
Thu 5
65° 52°
Fri 6
55° 50°
Sat 7
62° 51°
Sun 8
53° 50°
Mon 9
55° 50°
Tue 10
58° 49°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Overcast	49 / 66 °F	0%	14 mph SSE	7.1 ft	3:06 am · 6:20 pm	ECMWF
Fri 30	Rain	61 / 65 °F	100% · 1.33 in	16 mph SSW	4.9 ft	3:48 am	ECMWF
Sat 31	Light rain	55 / 63 °F	98% · 0.41 in	17 mph WNW	6.4 ft	4:35 am	ECMWF
Sun 1	Drizzle	53 / 60 °F	41% · 0.06 in	17 mph NNE	5.6 ft	5:33 am	ECMWF
Mon 2	Rain	59 / 63 °F	94% · 1.01 in	22 mph SW	4.9 ft	6:52 am · 11:58 pm	ECMWF
Tue 3	Drizzle	54 / 63 °F	76% · 0.06 in	20 mph NW	5.2 ft	8:32 am · 11:49 pm	ECMWF
Wed 4	Overcast	54 / 62 °F	15%	11 mph ENE	3.5 ft	10:10 am · 11:59 pm	ECMWF
Thu 5	Partly cloudy	59 / 65 °F	34%	11 mph SSW	3.0 ft	11:38 am	ECMWF
Fri 6	Light drizzle	52 / 65 °F	61% · 0.14 in	17 mph NW	7.4 ft	12:13 am · 12:56 pm	ECMWF
Sat 7	Overcast	50 / 55 °F	61%	12 mph N	7.4 ft	12:30 am · 2:03 pm	ECMWF
Sun 8	Heavy drizzle	51 / 62 °F	46% · 0.30 in	20 mph WNW	9.3 ft	12:50 am · 3:00 pm	ECMWF
Mon 9	Drizzle	50 / 53 °F	59% · 0.09 in	17 mph N	11 ft	1:12 am · 3:52 pm	ECMWF
Tue 10	Light rain	50 / 55 °F	50% · 0.37 in	18 mph WNW	10 ft	1:36 am · 4:40 pm	ECMWF
Wed 11	Light drizzle	49 / 58 °F	53% · 0.22 in	18 mph SSW	7.9 ft	2:03 am · 5:29 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	Overcast	Clear	Mainly clear	Mainly clear	Overcast	Overcast	Overcast	Overcast
Temperature	53°	51°	49°	56°	61°	61°	61°	65°
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)	3 E	5 ENE	5 ENE	5 ENE	6 SW	6 SSW	7 SSE	14 SSW
Humidity	61%	65%	76%	59%	49%	58%	70%	57%
UV	0	0	0	2	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 temperature today: 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	66°	65°	63°	60°	63°	63°	62°
AIFS	66°	66°	64°	63°	62°	60°	62°
GFS	61°	67°	67°	59°	60°	60°	61°
ICON	60°	63°	62°	59°	67°	62°	59°
Confidence	medium	high	high	high	medium	high	high

Do the models agree? · Rain
Rain	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	0	1.33 in	0.41 in	0.06 in	1.01 in	0.06 in	0
AIFS	0.01 in	0.76 in	0.54 in	0.08 in	0.62 in	0.15 in	0.06 in
GFS	0	0.83 in	0.36 in	0	0.99 in	0.02 in	0.01 in
ICON	0	0.93 in	0.53 in	0	0.28 in	0	0.04 in
Confidence	high	high	high	medium	medium	medium	medium

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	1421	1628	1733	1729	2257	2043	1119
AIFS	15	16	14	13	13	7	12
GFS	815	1327	2127	711	1219	915	1525
ICON	514	1026	1133	513	1545	614	1230
Confidence	medium	high	medium	medium	medium	low	high

Chance of rain from the ensemble models

Model	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF (51 scenarios)	0%	100%	98%	41%	94%	76%	15%
GFS (GEFS, 31 scenarios)	5%	99%	100%	19%	99%	74%	13%

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: normal temperatures, normal rain and a slightly warmer sea.

Next 6 weeks

When	TemperatureTemp.	Rain	Sea	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	Normal −0.5 °F	Normal	Above +2.0 °F	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal +0.2 °F	Normal	A bit above +1.6 °F	—
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +1.4 °F	A bit above +24%	A bit above +1.6 °F	61° / 57°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +2.2 °F	Normal	A bit above +1.6 °F	59° / 56°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +2.3 °F	Normal	Above +1.8 °F	57° / 54°

Coming months

When	TemperatureTemp.	Rain	Sea
November	A bit above +2.5 °F	Normal	Above +1.8 °F
December	A bit above +2.3 °F	Normal	A bit above +1.6 °F
January	A bit above +2.2 °F	Normal	A bit above +1.3 °F
February	Above +2.9 °F	Normal	A bit above +1.4 °F
March	A bit above +2.2 °F	Normal	A bit above +1.4 °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.

Oshima climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Oshima is in August and from May to June: highs of 69 °F to 86 °F, about 11 rainy days a month and 6 hours of sunshine a day.

Typhoon season: from August to September. In the last 30 years (1996–2025), 17 tropical cyclones passed within 93 mi of Oshima, about 6 every 10 years; 5 of them with hurricane-force winds (74 mph or more). The most recent: Nanmadol, in September 2022.

44° 33°

JanJ
45° 32°

FebF
50° 37°

MarM
60° 45°

AprA
69° 54°

MayM
75° 63°

JunJ
83° 71°

JulJ
86° 73°

AugA
79° 66°

SepS
69° 56°

OctO
60° 45°

NovN
51° 37°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	44°	33°	8.16 in	22	1.6	55°	6.9 ft	–
FebruaryFeb	45°	32°	5.44 in	17	2.8	52°	5.8 ft	–
MarchMar	50°	37°	5.27 in	14	4.2	51°	4.5 ft	–
AprilApr	60°	45°	4.65 in	11	5.5	53°	3.5 ft	–
MayMay	69°	54°	4.32 in	10	5.9	60°	2.6 ft	–
JuneJun	75°	63°	5.79 in	11	5.1	68°	2.0 ft	2
JulyJul	83°	71°	6.82 in	14	5.2	74°	2.1 ft	–
AugustAug	86°	73°	4.76 in	12	7.2	80°	2.2 ft	7
SeptemberSep	79°	66°	7.95 in	13	4.7	77°	2.7 ft	7
OctoberOct	69°	56°	6.37 in	13	4.2	71°	4.0 ft	1
NovemberNov	60°	45°	7.72 in	17	3.1	66°	5.2 ft	–
DecemberDec	51°	37°	9.49 in	22	1.7	60°	7.1 ft	–

Month	Water	Waves	Cyclones
Jan	55°	6.9 ft	–
Feb	52°	5.8 ft	–
Mar	51°	4.5 ft	–
Apr	53°	3.5 ft	–
May	60°	2.6 ft	–
Jun	68°	2.0 ft	2
Jul	74°	2.1 ft	–
Aug	80°	2.2 ft	7
Sep	77°	2.7 ft	7
Oct	71°	4.0 ft	1
Nov	66°	5.2 ft	–
Dec	60°	7.1 ft	–

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

A normal year brings 76.75 in of rain on about 175 days and about 1,550 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

Now61 °Ffeels like 57 °F

Tomorrow61 / 65 °F

It's 61 °F now (feels like 57 °F). Today, 49 °F to 66 °F; tomorrow, 61 °F to 65 °F.

Chance of rain

Today 0%
Fri 30 100% 1.33 in
Sat 31 98% 0.41 in
Sun 1 41% 0.06 in
Mon 2 94% 1.01 in
Tue 3 76% 0.06 in
Wed 4 15%

Today the chance of rain reaches 0%. The next day with likely rain is Friday 30: 100% and 1.33 in.

Recent rain: last 24 hours, 0.00 in; last 3 days, 0.19 in; last 7 days, 2.93 in.

Humidity and dew point

Humidity56%

Dew point46 °F

Humidity is 56% now and the dew point is 46 °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

Clouds100%

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

Now1

Today's peak4moderate

Fri 30: 3 · Sat 31: 3 · Sun 1: 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 Anglers expect normal activity
↘ Falling · now Anglers say fish feed more before the change

30.0030.2030.40 29.92

Falling now (−0.04 inHg in 3 hours). Over the next 48 hours: −0.20 inHg. Falling pressure: anglers say fish feed more before the change. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityFair · 40

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	53 / 60 °F	0.05 in	19 mph NNW
Tue 27	Drizzle	60 / 68 °F	0.13 in	19 mph NW
Mon 26	Drizzle	63 / 65 °F	0.24 in	15 mph NE
Sun 25	Rain	65 / 68 °F	1.37 in	10 mph NNE
Sat 24	Rain	64 / 67 °F	1.15 in	11 mph E
Fri 23	Overcast	56 / 68 °F	0	12 mph ENE
Thu 22	Light drizzle	57 / 63 °F	0.03 in	15 mph NNE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Heavy rain	64 / 73 °F	3.46 in	24 mph WSW
Tue 20	Rain	65 / 70 °F	1.95 in	12 mph ESE
Mon 19	Rain	68 / 76 °F	1.21 in	18 mph SSW
Sun 18	Overcast	60 / 77 °F	0	13 mph E
Sat 17	Mainly clear	60 / 70 °F	0	11 mph NE
Fri 16	Light drizzle	64 / 71 °F	0.07 in	14 mph SW
Thu 15	Overcast	59 / 69 °F	0	11 mph WSW
Wed 14	Rain	62 / 74 °F	0.91 in	21 mph W
Tue 13	Mainly clear	65 / 74 °F	0	11 mph SSE
Mon 12	Light drizzle	66 / 74 °F	0.01 in	8 mph NE
Sun 11	Overcast	63 / 77 °F	0	9 mph NE
Sat 10	Clear sky	64 / 74 °F	0	7 mph NE
Fri 9	Clear sky	62 / 75 °F	0	8 mph ENE
Thu 8	Mainly clear	58 / 73 °F	0	8 mph NE
Wed 7	Light drizzle	63 / 70 °F	0.01 in	13 mph N
Tue 6	Light drizzle	65 / 70 °F	0.14 in	10 mph N
Mon 5	Light drizzle	67 / 73 °F	0.02 in	14 mph SW
Sun 4	Overcast	64 / 70 °F	0	13 mph ENE
Sat 3	Overcast	61 / 72 °F	0	11 mph NE
Fri 2	Mainly clear	62 / 72 °F	0	12 mph N
Thu 1	Light drizzle	65 / 75 °F	0.02 in	10 mph WSW
Wed 30	Partly cloudy	62 / 75 °F	0	8 mph NE
Tue 29	Drizzle	64 / 71 °F	0.05 in	8 mph N

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 OshimaQuestions

What's the weather like today in Oshima?

Overcast, from 49 °F to 66 °F, with a light breeze from the southwest (7 mph) and a 0% chance of rain.

Will it rain tomorrow in Oshima?

On Friday 30 the chance of rain is 100% (1.33 in): rain.

How warm will it be this week?

Between a low of 49 °F and a high of 66 °F; the warmest day, Thursday 29.

What's the UV index today?

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

Is the pressure rising or falling?

It's 30.19 inHg and falling: −0.03 inHg over the last 24 hours.

When is the best time to visit Oshima?

The best time to visit Oshima is in August and from May to June: highs of 69 °F to 86 °F, about 11 rainy days a month and 6 hours of sunshine a day.

What is the weather like in Oshima in October?

In October, Oshima normally sees highs of 69 °F and lows of 56 °F, with about 13 rainy days (6.37 in for the month) and 4 hours of sunshine a day. The sea is around 71 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Oshima?

The warmest is August, with average highs of 86 °F, and the coldest February, with lows of 32 °F. The wettest is December (9.49 in) and the driest, May.

When is typhoon season in Oshima?

Typhoon season: from August to September. In the last 30 years (1996–2025), 17 tropical cyclones passed within 93 mi of Oshima, about 6 every 10 years; 5 of them with hurricane-force winds (74 mph or more). The most recent: Nanmadol, in September 2022.

More about Oshima today

Weather near Oshima

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 1.5 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 2:32 pm (local time).

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