Weather in Onagawa

14-day forecast · updated today, Thursday, October 29, at 9:05 am (GMT+9)

Now · clear sky 53 °F

Feels like: 50 °F
Low / high: 43 / 57 °F
Rain: 2%
Wind: 2 mph WSW

→ 30.36 inHg · steady

Today in Onagawa: overcast, 43 °F to 57 °F, with a 2% chance of rain and a light air from the west-southwest (2 mph). Tomorrow, overcast, 51 °F to 67 °F and a 21% chance of rain. The warmest day of the week is Saturday 31, at 67 °F. Next likely rain: Saturday 31 (47%).

Temperatures for the next 14 days

57° 43°
Today
67° 51°
Fri 30
67° 50°
Sat 31
58° 47°
Sun 1
60° 48°
Mon 2
61° 44°
Tue 3
61° 43°
Wed 4
55° 47°
Thu 5
60° 45°
Fri 6
51° 37°
Sat 7
55° 37°
Sun 8
50° 39°
Mon 9
51° 38°
Tue 10
50° 39°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Overcast	43 / 57 °F	2%	10 mph S	1.9 ft	6:08 am · 4:19 pm	ECMWF
Fri 30	Overcast	51 / 67 °F	21%	4 mph SSW	4.7 ft	7:03 am · 4:51 pm	ECMWF
Sat 31	Light drizzle	50 / 67 °F	47% · 0.02 in	16 mph WNW	4.8 ft	8:06 am · 5:28 pm	ECMWF
Sun 1	Overcast	47 / 58 °F	7%	17 mph WNW	3.8 ft	9:22 am · 6:13 pm	ECMWF
Mon 2	Light drizzle	48 / 60 °F	56% · 0.05 in	8 mph SSW	4.3 ft	10:53 am · 7:29 pm	ECMWF
Tue 3	Overcast	44 / 61 °F	14%	13 mph WNW	4.4 ft	11:52 am · 10:12 pm	ECMWF
Wed 4	Overcast	43 / 61 °F	4%	9 mph WNW	2.9 ft	12:26 pm	ECMWF
Thu 5	Heavy drizzle	47 / 55 °F	48% · 0.43 in	5 mph N	2.9 ft	12:20 am · 12:54 pm	ECMWF
Fri 6	Drizzle	45 / 60 °F	40% · 0.12 in	12 mph WNW	4.5 ft	1:34 am · 1:20 pm	ECMWF
Sat 7	Partly cloudy	37 / 51 °F	14%	15 mph WNW	3.9 ft	2:30 am · 1:46 pm	ECMWF
Sun 8	Light drizzle	37 / 55 °F	17% · 0.01 in	11 mph S	3.1 ft	3:18 am · 2:12 pm	ECMWF
Mon 9	Light drizzle	39 / 50 °F	20% · 0.02 in	12 mph WNW	3.0 ft	4:02 am · 2:37 pm	ECMWF
Tue 10	Light drizzle	38 / 51 °F	22% · 0.02 in	15 mph W	3.9 ft	4:44 am · 3:03 pm	ECMWF
Wed 11	Partly cloudy	39 / 50 °F	19%	13 mph WNW	2.6 ft	5:24 am · 3:29 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	Mainly clear	Partly cloudy	Mainly clear	Clear sky	Mainly clear	Overcast	Overcast	Overcast
Temperature	46°	45°	44°	53°	57°	56°	55°	57°
Chance of rain	0%	0%	0%	0%	0%	0%	0%	2%
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)	9 WNW	3 WNW	2 WSW	2 WSW	7 SSW	10 SE	8 SE	5 SSE
Humidity	66%	76%	83%	59%	50%	60%	72%	81%
UV	0	0	0	2	3	0	0	0
Model	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF

Do the models agree?

Low confidence

They don't agree on wind on Sunday 1: 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	57°	67°	67°	58°	60°	61°	61°
AIFS	58°	62°	64°	58°	59°	60°	58°
GFS	60°	63°	65°	56°	54°	58°	56°
ICON	62°	62°	66°	58°	60°	59°	56°
Confidence	high	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	0	0.02 in	0	0.05 in	0	0
AIFS	0.01 in	0.07 in	0.06 in	0.01 in	0.19 in	0.02 in	0.13 in
GFS	0.02 in	0	0.04 in	0	0.75 in	0	0.01 in
ICON	0	0.06 in	0	0	0	0	0
Confidence	high	medium	medium	high	medium	high	medium

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	1022	411	1632	1734	823	1328	923
AIFS	13	7	14	12	8	11	7
GFS	1625	814	2540	2647	817	1626	812
ICON	1224	715	1836	1633	1429	1836	817
Confidence	high	high	medium	low	high	medium	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)	2%	21%	47%	7%	56%	14%	4%
GFS (GEFS, 31 scenarios)	87%	97%	39%	0%	65%	16%	0%

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	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	A bit below −2.3 °F	Normal	—
Nov 9 – Nov 15Nov 9–Nov 15	A bit below −1.4 °F	A bit below −24%	—
Nov 16 – Nov 22Nov 16–Nov 22	Normal +0.5 °F	Normal	55° / 45°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +1.3 °F	Normal	53° / 44°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +1.4 °F	A bit above +27%	50° / 41°

Coming months

When	TemperatureTemp.	Rain
November	Above +3.2 °F	A bit above +31%
December	Above +2.9 °F	Above +54%
January	Above +3.1 °F	Normal
February	Above +3.8 °F	Normal
March	Above +3.4 °F	Normal

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. The long-range sea temperature isn't usable at this spot (the model's grid cell falls on land).

Onagawa climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Onagawa is from July to September: highs of 73 °F to 78 °F, about 13 rainy days a month and 5 hours of sunshine a day.

Typhoon season: from July to September, peaking in August. In the last 30 years (1996–2025), 26 tropical cyclones passed within 93 mi of Onagawa, about 9 every 10 years; 4 of them with hurricane-force winds (74 mph or more). The most recent: Nari, in July 2025.

40° 28°

JanJ
40° 28°

FebF
45° 32°

MarM
55° 41°

AprA
63° 50°

MayM
68° 58°

JunJ
75° 65°

JulJ
78° 68°

AugA
73° 62°

SepS
64° 51°

OctO
55° 41°

NovN
45° 32°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	40°	28°	1.45 in	9	5.2	52°	6.1 ft	–
FebruaryFeb	40°	28°	1.41 in	7	5.4	48°	5.8 ft	–
MarchMar	45°	32°	2.77 in	8	5.7	47°	5.6 ft	–
AprilApr	55°	41°	4.16 in	8	5.7	50°	5.4 ft	–
MayMay	63°	50°	4.04 in	9	5.6	56°	4.8 ft	–
JuneJun	68°	58°	4.88 in	10	4.6	63°	4.5 ft	2
JulyJul	75°	65°	6.09 in	14	4.0	69°	4.3 ft	4
AugustAug	78°	68°	4.86 in	12	5.1	74°	4.9 ft	10
SeptemberSep	73°	62°	5.81 in	12	4.0	72°	5.5 ft	7
OctoberOct	64°	51°	6.19 in	10	4.3	67°	5.7 ft	3
NovemberNov	55°	41°	2.44 in	9	4.2	61°	5.1 ft	–
DecemberDec	45°	32°	1.82 in	9	4.3	57°	5.7 ft	–

Month	Water	Waves	Cyclones
Jan	52°	6.1 ft	–
Feb	48°	5.8 ft	–
Mar	47°	5.6 ft	–
Apr	50°	5.4 ft	–
May	56°	4.8 ft	–
Jun	63°	4.5 ft	2
Jul	69°	4.3 ft	4
Aug	74°	4.9 ft	10
Sep	72°	5.5 ft	7
Oct	67°	5.7 ft	3
Nov	61°	5.1 ft	–
Dec	57°	5.7 ft	–

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

A normal year brings 45.93 in of rain on about 116 days and about 1,750 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

Now53 °Ffeels like 50 °F

Tomorrow51 / 67 °F

It's 53 °F now (feels like 50 °F). Today, 43 °F to 57 °F; tomorrow, 51 °F to 67 °F.

Chance of rain

Today 2%
Fri 30 21%
Sat 31 47% 0.02 in
Sun 1 7%
Mon 2 56% 0.05 in
Tue 3 14%
Wed 4 4%

Today the chance of rain reaches 2%. The next day with likely rain is Saturday 31: 47% and 0.02 in.

Recent rain: last 24 hours, 0.00 in; last 3 days, 0.05 in; last 7 days, 0.74 in.

Humidity and dew point

Humidity59%

Dew point39 °F

Humidity is 59% now and the dew point is 39 °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

Clouds15%

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

Now3

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 · now Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

29.8030.0030.2030.40 29.76

Steady now (+0.02 inHg in 3 hours). Over the next 48 hours: −0.55 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityFair · 32

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	45 / 53 °F	0.01 in	18 mph WNW
Tue 27	Light drizzle	54 / 65 °F	0.01 in	10 mph NNW
Mon 26	Light drizzle	53 / 61 °F	0.02 in	8 mph NE
Sun 25	Drizzle	59 / 64 °F	0.37 in	7 mph NNW
Sat 24	Drizzle	51 / 64 °F	0.33 in	7 mph SW
Fri 23	Overcast	44 / 61 °F	0	6 mph SSW
Thu 22	Light drizzle	48 / 62 °F	0.01 in	17 mph WNW

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Heavy drizzle	61 / 72 °F	0.37 in	17 mph WSW
Tue 20	Rain	61 / 65 °F	0.66 in	6 mph NNE
Mon 19	Heavy drizzle	64 / 72 °F	0.18 in	11 mph SSW
Sun 18	Overcast	47 / 66 °F	0	12 mph SSE
Sat 17	Partly cloudy	54 / 69 °F	0	13 mph WNW
Fri 16	Overcast	51 / 75 °F	0	13 mph W
Thu 15	Partly cloudy	51 / 68 °F	0	15 mph W
Wed 14	Light rain	59 / 72 °F	0.30 in	16 mph W
Tue 13	Light drizzle	58 / 73 °F	0.04 in	9 mph ESE
Mon 12	Overcast	58 / 72 °F	0	9 mph NE
Sun 11	Overcast	57 / 77 °F	0	7 mph NNE
Sat 10	Overcast	53 / 73 °F	0	7 mph SSE
Fri 9	Clear sky	50 / 72 °F	0	5 mph NNW
Thu 8	Partly cloudy	51 / 72 °F	0	13 mph WNW
Wed 7	Mainly clear	56 / 71 °F	0	15 mph WNW
Tue 6	Overcast	60 / 77 °F	0	11 mph NNW
Mon 5	Light drizzle	60 / 72 °F	0.11 in	9 mph ESE
Sun 4	Overcast	51 / 67 °F	0	6 mph NE
Sat 3	Partly cloudy	54 / 69 °F	0	14 mph WNW
Fri 2	Mainly clear	56 / 69 °F	0	15 mph WNW
Thu 1	Overcast	60 / 79 °F	0	11 mph NW
Wed 30	Clear sky	54 / 73 °F	0	7 mph ESE
Tue 29	Overcast	60 / 70 °F	0	13 mph WNW

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 OnagawaQuestions

What's the weather like today in Onagawa?

Overcast, from 43 °F to 57 °F, with a light air from the west-southwest (2 mph) and a 2% chance of rain.

Will it rain tomorrow in Onagawa?

On Friday 30 the chance of rain is 21% (0.00 in): overcast.

How warm will it be this week?

Between a low of 43 °F and a high of 67 °F; the warmest day, Saturday 31.

What's the UV index today?

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

Is the pressure rising or falling?

It's 30.36 inHg and steady: +0.42 inHg over the last 24 hours.

When is the best time to visit Onagawa?

The best time to visit Onagawa is from July to September: highs of 73 °F to 78 °F, about 13 rainy days a month and 5 hours of sunshine a day.

What is the weather like in Onagawa in October?

In October, Onagawa normally sees highs of 64 °F and lows of 51 °F, with about 10 rainy days (6.19 in for the month) and 4 hours of sunshine a day. The sea is around 67 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Onagawa?

The warmest is August, with average highs of 78 °F, and the coldest January, with lows of 28 °F. The wettest is October (6.19 in) and the driest, February.

When is typhoon season in Onagawa?

Typhoon season: from July to September, peaking in August. In the last 30 years (1996–2025), 26 tropical cyclones passed within 93 mi of Onagawa, about 9 every 10 years; 4 of them with hurricane-force winds (74 mph or more). The most recent: Nari, in July 2025.

More about Onagawa today

Weather near Onagawa

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 11 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 9:05 am (local time).

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