Weather in Seisui

14-day forecast · updated today, Thursday, October 29, at 8:44 am (GMT+9)

Now · clear sky 75 °F

Feels like: 76 °F
Low / high: 67 / 80 °F
Rain: 3%
Wind: 8 mph ESE

→ 30.17 inHg · steady

Today in Seisui: overcast, 67 °F to 80 °F, with a 3% chance of rain and a gentle breeze from the east-southeast (8 mph). Tomorrow, light rain, 72 °F to 75 °F and a 90% chance of rain. The warmest day of the week is Thursday 29, at 80 °F.

Temperatures for the next 14 days

80° 67°
Today
75° 72°
Fri 30
76° 68°
Sat 31
77° 64°
Sun 1
79° 70°
Mon 2
76° 71°
Tue 3
78° 72°
Wed 4
79° 73°
Thu 5
76° 69°
Fri 6
75° 68°
Sat 7
76° 68°
Sun 8
72° 67°
Mon 9
67° 65°
Tue 10
70° 64°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Overcast	67 / 80 °F	3%	8 mph E	3.9 ft	8:40 am · 7:53 pm	ECMWF
Fri 30	Light rain	72 / 75 °F	90% · 0.54 in	10 mph NNE	3.5 ft	9:33 am · 8:34 pm	ECMWF
Sat 31	Mainly clear	68 / 76 °F	4%	13 mph NNE	4.3 ft	10:35 am · 9:25 pm	ECMWF
Sun 1	Mainly clear	64 / 77 °F	0%	6 mph SE	5.4 ft	11:52 am · 10:37 pm	ECMWF
Mon 2	Drizzle	70 / 79 °F	39% · 0.11 in	11 mph W	5.4 ft	1:20 pm	ECMWF
Tue 3	Light drizzle	71 / 76 °F	14% · 0.01 in	14 mph NNE	7.3 ft	12:25 am · 2:30 pm	ECMWF
Wed 4	Overcast	72 / 78 °F	13%	11 mph ENE	9.2 ft	2:12 am · 3:20 pm	ECMWF
Thu 5	Light drizzle	73 / 79 °F	37% · 0.02 in	11 mph NNE	9.3 ft	3:31 am · 3:58 pm	ECMWF
Fri 6	Mainly clear	69 / 76 °F	37%	16 mph NNE	7.2 ft	4:30 am · 4:31 pm	ECMWF
Sat 7	Mainly clear	68 / 75 °F	20%	11 mph NE	7.0 ft	5:19 am · 5:01 pm	ECMWF
Sun 8	Overcast	68 / 76 °F	27%	11 mph NE	6.2 ft	6:01 am · 5:29 pm	ECMWF
Mon 9	Light drizzle	67 / 72 °F	31% · 0.02 in	17 mph NNE	6.5 ft	6:40 am · 5:57 pm	ECMWF
Tue 10	Overcast	65 / 67 °F	33%	12 mph N	5.8 ft	7:17 am · 6:24 pm	ECMWF
Wed 11	Overcast	64 / 70 °F	31%	11 mph NNE	4.3 ft	7:53 am · 6:51 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	Clear	Clear	Mainly clear	Clear sky	Overcast	Overcast	Overcast	Partly cloudy
Temperature	69°	68°	68°	76°	80°	79°	75°	73°
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)	5 NE	6 ENE	4 NE	8 ESE	6 ESE	5 SE	3 ENE	4 E
Humidity	76%	77%	79%	61%	54%	60%	74%	72%
UV	0	0	0	2	4	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 rain 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	80°	75°	76°	77°	79°	76°	78°
AIFS	78°	76°	75°	76°	77°	76°	77°
GFS	78°	78°	77°	77°	81°	74°	77°
ICON	78°	75°	76°	76°	80°	78°	78°
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	0.54 in	0	0	0.11 in	0.01 in	0
AIFS	0.01 in	0.56 in	0	0	0.07 in	0	0.02 in
GFS	0	0.06 in	0	0	0.03 in	0	0
ICON	0	0.13 in	0	0	0	0	0
Confidence	high	medium	high	high	medium	high	high

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	819	1018	1330	617	1124	1436	1129
AIFS	11	11	14	10	17	17	16
GFS	1016	712	1021	815	1224	1327	1428
ICON	923	618	1130	720	927	1129	1129
Confidence	high	high	high	high	medium	high	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)	3%	90%	4%	0%	39%	14%	13%
GFS (GEFS, 31 scenarios)	20%	65%	13%	0%	39%	6%	16%

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 and normal rain.

Next 6 weeks

When	TemperatureTemp.	Rain	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	A bit above +1.1 °F	Below −57%	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal +0.5 °F	A bit below −31%	—
Nov 16 – Nov 22Nov 16–Nov 22	Normal +0.7 °F	A bit above +21%	73° / 68°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +1.6 °F	A bit above +21%	72° / 67°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +2.0 °F	Above +52%	71° / 65°

Coming months

When	TemperatureTemp.	Rain
November	A bit above +1.4 °F	A bit above +34%
December	A bit above +1.8 °F	Above +67%
January	A bit above +2.0 °F	A bit above +46%
February	A bit above +2.3 °F	Above +60%
March	A bit above +2.2 °F	Above +56%

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).

Seisui climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Seisui is from July to November and in April: highs of 72 °F to 87 °F, about 13 rainy days a month and 6 hours of sunshine a day.

Typhoon season: from June to October, peaking in September. In the last 30 years (1996–2025), 45 tropical cyclones passed within 93 mi of Seisui, about 2 a year; 27 of them with hurricane-force winds (74 mph or more). The most recent: Nakri, in October 2025.

64° 56°

JanJ
64° 56°

FebF
67° 59°

MarM
72° 64°

AprA
77° 69°

MayM
82° 74°

JunJ
87° 79°

JulJ
87° 79°

AugA
85° 76°

SepS
80° 72°

OctO
74° 66°

NovN
67° 59°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	64°	56°	4.99 in	12	3.5	71°	4.4 ft	–
FebruaryFeb	64°	56°	5.59 in	11	3.9	70°	4.6 ft	–
MarchMar	67°	59°	6.49 in	13	5.0	70°	4.5 ft	–
AprilApr	72°	64°	7.77 in	14	5.4	71°	4.2 ft	–
MayMay	77°	69°	11.63 in	16	5.6	75°	4.0 ft	3
JuneJun	82°	74°	16.67 in	21	4.8	78°	4.1 ft	7
JulyJul	87°	79°	8.08 in	15	7.4	83°	4.8 ft	5
AugustAug	87°	79°	7.46 in	17	7.8	84°	5.5 ft	11
SeptemberSep	85°	76°	8.07 in	16	6.7	83°	5.6 ft	14
OctoberOct	80°	72°	7.15 in	13	5.8	80°	6.2 ft	5
NovemberNov	74°	66°	7.24 in	10	4.7	77°	4.8 ft	–
DecemberDec	67°	59°	5.22 in	12	3.5	74°	4.8 ft	–

Month	Water	Waves	Cyclones
Jan	71°	4.4 ft	–
Feb	70°	4.6 ft	–
Mar	70°	4.5 ft	–
Apr	71°	4.2 ft	–
May	75°	4.0 ft	3
Jun	78°	4.1 ft	7
Jul	83°	4.8 ft	5
Aug	84°	5.5 ft	11
Sep	83°	5.6 ft	14
Oct	80°	6.2 ft	5
Nov	77°	4.8 ft	–
Dec	74°	4.8 ft	–

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

A normal year brings 96.36 in of rain on about 170 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

Now75 °Ffeels like 76 °F

Tomorrow72 / 75 °F

It's 75 °F now (feels like 76 °F). Today, 67 °F to 80 °F; tomorrow, 72 °F to 75 °F.

Chance of rain

Today 3%
Fri 30 90% 0.54 in
Sat 31 4%
Sun 1 0%
Mon 2 39% 0.11 in
Tue 3 14% 0.01 in
Wed 4 13%

Today the chance of rain reaches 3%. The next day with likely rain is Friday 30: 90% and 0.54 in.

Recent rain: last 24 hours, 0.00 in; last 3 days, 0.26 in; last 7 days, 2.01 in.

Humidity and dew point

Humidity63%

Dew point62 °F

Humidity is 63% 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

Now15 migood

Clouds17%

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

Now2

Today's peak4moderate

Fri 30: 3 · Sat 31: 7 · Sun 1: 7

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

30.1030.20 30.05

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

Air and pollen

Air qualityFair · 39

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 / 74 °F	0.01 in	17 mph NNE
Tue 27	Light drizzle	71 / 79 °F	0.14 in	18 mph NNW
Mon 26	Light drizzle	76 / 80 °F	0.14 in	19 mph W
Sun 25	Light drizzle	80 / 85 °F	0.06 in	17 mph S
Sat 24	Drizzle	76 / 84 °F	0.22 in	22 mph SE
Fri 23	Light rain	76 / 81 °F	0.82 in	18 mph ESE
Thu 22	Light rain	74 / 79 °F	0.63 in	19 mph NE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Drizzle	76 / 82 °F	0.14 in	14 mph NNE
Tue 20	Drizzle	74 / 83 °F	0.17 in	6 mph ESE
Mon 19	Drizzle	75 / 84 °F	0.20 in	5 mph E
Sun 18	Mainly clear	75 / 83 °F	0	11 mph ESE
Sat 17	Overcast	75 / 82 °F	0	11 mph E
Fri 16	Light drizzle	72 / 81 °F	0.04 in	10 mph E
Thu 15	Overcast	69 / 78 °F	0	11 mph NNE
Wed 14	Drizzle	71 / 80 °F	0.05 in	16 mph N
Tue 13	Drizzle	75 / 84 °F	0.11 in	9 mph SE
Mon 12	Drizzle	75 / 85 °F	0.20 in	8 mph ESE
Sun 11	Drizzle	74 / 82 °F	0.22 in	10 mph SE
Sat 10	Drizzle	74 / 83 °F	0.33 in	12 mph SE
Fri 9	Drizzle	73 / 84 °F	0.11 in	11 mph ENE
Thu 8	Partly cloudy	71 / 82 °F	0	11 mph NE
Wed 7	Partly cloudy	72 / 79 °F	0	16 mph N
Tue 6	Light drizzle	74 / 77 °F	0.01 in	20 mph NNW
Mon 5	Light drizzle	77 / 82 °F	0.04 in	18 mph N
Sun 4	Light drizzle	75 / 86 °F	0.04 in	8 mph NE
Sat 3	Light drizzle	76 / 86 °F	0.04 in	9 mph ENE
Fri 2	Light drizzle	78 / 83 °F	0.02 in	12 mph NNE
Thu 1	Light drizzle	76 / 84 °F	0.01 in	7 mph NNW
Wed 30	Clear sky	78 / 85 °F	0	8 mph NNW
Tue 29	Drizzle	79 / 84 °F	0.14 in	13 mph NW

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 SeisuiQuestions

What's the weather like today in Seisui?

Overcast, from 67 °F to 80 °F, with a gentle breeze from the east-southeast (8 mph) and a 3% chance of rain.

Will it rain tomorrow in Seisui?

On Friday 30 the chance of rain is 90% (0.54 in): light rain.

How warm will it be this week?

Between a low of 64 °F and a high of 80 °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 30.17 inHg and steady: +0.04 inHg over the last 24 hours.

When is the best time to visit Seisui?

The best time to visit Seisui is from July to November and in April: highs of 72 °F to 87 °F, about 13 rainy days a month and 6 hours of sunshine a day.

What is the weather like in Seisui in October?

In October, Seisui normally sees highs of 80 °F and lows of 72 °F, with about 13 rainy days (7.15 in for the month) and 6 hours of sunshine a day. The sea is around 80 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Seisui?

The warmest is July, with average highs of 87 °F, and the coldest January, with lows of 56 °F. The wettest is June (16.67 in) and the driest, January.

When is typhoon season in Seisui?

Typhoon season: from June to October, peaking in September. In the last 30 years (1996–2025), 45 tropical cyclones passed within 93 mi of Seisui, about 2 a year; 27 of them with hurricane-force winds (74 mph or more). The most recent: Nakri, in October 2025.

More about Seisui today

Weather near Seisui

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 9.2 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 8:44 am (local time).

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