Weather in Isahaya

14-day forecast · updated today, Thursday, October 29, at 8:12 pm (GMT+9)

Now · light drizzle 64 °F

Feels like: 67 °F
Low / high: 54 / 68 °F
Rain: 100% · 0.20 in
Wind: 3 mph SSW

→ 30.15 inHg · steady

Today in Isahaya: heavy drizzle, 54 °F to 68 °F, with a 100% chance of rain (0.20 in) and a light air from the south-southwest (3 mph). Tomorrow, rain, 60 °F to 71 °F and a 100% chance of rain. The warmest day of the week is Monday 2, at 71 °F.

Measured now at the airport

Nagasaki (RJFU), 9.1 mi away · 1 h 12 min ago

Visibility6.2 mi or more

WeatherNothing to note

Temperature68 °F

Wind1 mph from the southeast

It's what the airport's weather station measured, not a forecast: on the coast, wind and fog can be different. Airports report every 30 or 60 minutes.

Airport METAR report, via NOAA's Aviation Weather Center (aviationweather.gov). Sources and licenses

Temperatures for the next 14 days

68° 54°
Today
71° 60°
Fri 30
70° 58°
Sat 31
70° 57°
Sun 1
71° 60°
Mon 2
67° 56°
Tue 3
65° 59°
Wed 4
70° 60°
Thu 5
64° 51°
Fri 6
66° 51°
Sat 7
60° 50°
Sun 8
63° 50°
Mon 9
58° 49°
Tue 10
60° 47°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Heavy drizzle	54 / 68 °F	100% · 0.20 in	10 mph S	0.5 ft	10:05 am · 9:27 pm	ECMWF
Fri 30	Rain	60 / 71 °F	100% · 0.57 in	10 mph W	1.4 ft	10:57 am · 10:07 pm	ECMWF
Sat 31	Clear sky	58 / 70 °F	0%	11 mph NW	0.7 ft	12:01 pm · 10:57 pm	ECMWF
Sun 1	Overcast	57 / 70 °F	11%	6 mph SSE	0.5 ft	1:25 pm	ECMWF
Mon 2	Rain	60 / 71 °F	88% · 0.71 in	13 mph W	3.1 ft	12:16 am · 2:56 pm	ECMWF
Tue 3	Overcast	56 / 67 °F	4%	9 mph N	1.1 ft	2:24 am · 4:07 pm	ECMWF
Wed 4	Light drizzle	59 / 65 °F	18% · 0.06 in	10 mph ENE	1.0 ft	4:04 am · 4:56 pm	ECMWF
Thu 5	Light rain	60 / 70 °F	45% · 0.38 in	12 mph SSW	0.2 ft	5:13 am · 5:33 pm	ECMWF
Fri 6	Mainly clear	51 / 64 °F	30%	13 mph NNW	1.0 ft	6:06 am · 6:05 pm	ECMWF
Sat 7	Overcast	51 / 66 °F	3%	9 mph N	1.1 ft	6:50 am · 6:34 pm	ECMWF
Sun 8	Mainly clear	50 / 60 °F	6%	13 mph NNE	1.7 ft	7:29 am · 7:03 pm	ECMWF
Mon 9	Mainly clear	50 / 63 °F	16%	10 mph N	1.1 ft	8:06 am · 7:31 pm	ECMWF
Tue 10	Mainly clear	49 / 58 °F	9%	12 mph N	1.3 ft	8:41 am · 7:58 pm	ECMWF
Wed 11	Partly cloudy	47 / 60 °F	7%	6 mph N	0.9 ft	9:15 am · 8:25 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	Partly cloudy	Partly cloudy	Light drizzle	Drizzle	Light drizzle	Light drizzle
Temperature	55°	55°	56°	66°	68°	67°	64°	64°
Chance of rain	0%	0%	0%	0%	84%	98%	51%	57%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.01 in	0.02 in	0.01 in	0.00 in
Wind (mph)	2 E	2 E	4 SSE	6 SSE	10 SW	7 SW	3 S	4 SSW
Humidity	83%	82%	78%	77%	77%	84%	95%	95%
UV	0	0	0	2	4	1	0	0
Model	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF

Do the models agree?

High confidence

The models agree for the next few days: the forecast is fairly solid.

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	68°	71°	70°	70°	71°	67°	65°
AIFS	71°	73°	74°	73°	72°	72°	66°
GFS	69°	70°	71°	70°	71°	70°	69°
ICON	69°	69°	71°	70°	72°	66°	68°
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	0.20 in	0.57 in	0	0	0.71 in	0	0.06 in
AIFS	0.16 in	0.57 in	0	0.02 in	0.52 in	0	0.06 in
GFS	0.13 in	0.87 in	0	0	0.58 in	0	0
ICON	0.19 in	0.67 in	0	0	0.25 in	0	0
Confidence	high	high	high	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	1024	1025	1128	615	1341	926	1027
AIFS	5	8	9	7	12	9	8
GFS	621	1327	915	921	2238	611	1227
ICON	923	724	921	613	1126	1124	719
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)	100%	100%	0%	11%	88%	4%	18%
GFS (GEFS, 31 scenarios)	98%	100%	0%	11%	90%	0%	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	Normal −0.2 °F	Below −50%	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal −0.2 °F	A bit below −21%	—
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +1.3 °F	Normal	63° / 52°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +2.2 °F	A bit above +33%	61° / 50°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +2.3 °F	A bit above +47%	59° / 49°

Coming months

When	TemperatureTemp.	Rain
November	A bit above +2.3 °F	A bit above +43%
December	A bit above +1.8 °F	Above +52%
January	A bit above +2.0 °F	A bit above +30%
February	Above +2.7 °F	A bit above +21%
March	A bit above +2.0 °F	A bit above +25%

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).

Isahaya climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Isahaya is in October: highs of 75 °F, about 7 rainy days a month and 6 hours of sunshine a day.

Typhoon season: from July to September. In the last 30 years (1996–2025), 31 tropical cyclones passed within 93 mi of Isahaya, one or two a year; 17 of them with hurricane-force winds (74 mph or more). The most recent: Lingling, in August 2025.

51° 36°

JanJ
53° 38°

FebF
60° 43°

MarM
68° 51°

AprA
76° 60°

MayM
80° 67°

JunJ
87° 75°

JulJ
89° 76°

AugA
84° 69°

SepS
75° 59°

OctO
65° 49°

NovN
55° 39°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	51°	36°	2.35 in	7	3.2	61°	2.7 ft	–
FebruaryFeb	53°	38°	3.23 in	7	3.9	59°	2.5 ft	–
MarchMar	60°	43°	4.63 in	10	4.9	60°	2.3 ft	–
AprilApr	68°	51°	5.50 in	9	5.2	63°	2.1 ft	–
MayMay	76°	60°	6.22 in	9	5.6	67°	1.5 ft	–
JuneJun	80°	67°	14.08 in	15	3.7	72°	1.8 ft	2
JulyJul	87°	75°	13.06 in	14	5.0	78°	2.1 ft	6
AugustAug	89°	76°	7.89 in	13	6.3	81°	2.0 ft	11
SeptemberSep	84°	69°	7.60 in	11	5.4	79°	1.7 ft	11
OctoberOct	75°	59°	3.61 in	7	5.6	75°	1.8 ft	1
NovemberNov	65°	49°	3.35 in	8	4.4	70°	1.9 ft	–
DecemberDec	55°	39°	2.78 in	7	3.4	65°	2.7 ft	–

Month	Water	Waves	Cyclones
Jan	61°	2.7 ft	–
Feb	59°	2.5 ft	–
Mar	60°	2.3 ft	–
Apr	63°	2.1 ft	–
May	67°	1.5 ft	–
Jun	72°	1.8 ft	2
Jul	78°	2.1 ft	6
Aug	81°	2.0 ft	11
Sep	79°	1.7 ft	11
Oct	75°	1.8 ft	1
Nov	70°	1.9 ft	–
Dec	65°	2.7 ft	–

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

A normal year brings 74.31 in of rain on about 117 days and about 1,700 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

Now64 °Ffeels like 67 °F

Tomorrow60 / 71 °F

It's 64 °F now (feels like 67 °F). Today, 54 °F to 68 °F; tomorrow, 60 °F to 71 °F.

Chance of rain

Today 100% 0.20 in
Fri 30 100% 0.57 in
Sat 31 0%
Sun 1 11%
Mon 2 88% 0.71 in
Tue 3 4%
Wed 4 18% 0.06 in

Today the chance of rain reaches 100%, with 0.20 in in total. The next day with likely rain is Friday 30: 100% and 0.57 in.

Recent rain: last 24 hours, 0.11 in; last 3 days, 0.17 in; last 7 days, 6.30 in.

Humidity and dew point

Humidity95%

Dew point63 °F

Humidity is 95% now and the dew point is 63 °F. The temperature is very close to the dew point: fog may form.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now6.4 migood

Clouds100%

Visibility is good now (6.4 mi). No fog expected today.

UV index

Now0

Today's peak4moderate

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

30.0030.1030.2030.30 30.01

Steady now (−0.01 inHg in 3 hours). Over the next 48 hours: +0.03 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	Partly cloudy	55 / 70 °F	0	10 mph N
Tue 27	Light drizzle	60 / 72 °F	0.06 in	12 mph NNW
Mon 26	Heavy rain	67 / 73 °F	2.51 in	13 mph NNE
Sun 25	Rain	69 / 77 °F	1.47 in	12 mph ENE
Sat 24	Light rain	67 / 82 °F	0.50 in	13 mph SSE
Fri 23	Rain	59 / 69 °F	1.65 in	6 mph ENE
Thu 22	Overcast	59 / 73 °F	0	10 mph NNE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Heavy drizzle	64 / 75 °F	0.25 in	11 mph W
Tue 20	Light drizzle	72 / 82 °F	0.08 in	10 mph SSW
Mon 19	Light drizzle	72 / 81 °F	0.03 in	8 mph SSW
Sun 18	Light drizzle	63 / 82 °F	0.01 in	11 mph S
Sat 17	Overcast	62 / 82 °F	0	6 mph ENE
Fri 16	Drizzle	61 / 75 °F	0.07 in	3 mph NE
Thu 15	Overcast	57 / 75 °F	0	6 mph NE
Wed 14	Clear sky	59 / 72 °F	0	12 mph NNW
Tue 13	Light drizzle	69 / 80 °F	0.14 in	13 mph SSW
Mon 12	Light drizzle	70 / 85 °F	0.01 in	5 mph WNW
Sun 11	Overcast	68 / 83 °F	0	5 mph NNW
Sat 10	Light drizzle	69 / 80 °F	0.01 in	5 mph ENE
Fri 9	Light drizzle	62 / 79 °F	0.02 in	6 mph NE
Thu 8	Clear sky	59 / 78 °F	0	4 mph NE
Wed 7	Partly cloudy	62 / 75 °F	0	10 mph N
Tue 6	Overcast	64 / 73 °F	0	13 mph NNW
Mon 5	Partly cloudy	65 / 79 °F	0	12 mph NNW
Sun 4	Drizzle	67 / 73 °F	0.14 in	6 mph NNE
Sat 3	Overcast	62 / 79 °F	0	8 mph ENE
Fri 2	Overcast	66 / 78 °F	0	10 mph NNE
Thu 1	Overcast	70 / 83 °F	0	9 mph N
Wed 30	Clear sky	67 / 84 °F	0	4 mph NE
Tue 29	Rain	69 / 81 °F	0.57 in	6 mph NE

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 IsahayaQuestions

What's the weather like today in Isahaya?

Heavy drizzle, from 54 °F to 68 °F, with a light air from the south-southwest (3 mph) and a 100% chance of rain.

Will it rain tomorrow in Isahaya?

On Friday 30 the chance of rain is 100% (0.57 in): rain.

How warm will it be this week?

Between a low of 54 °F and a high of 71 °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 30.15 inHg and steady: −0.10 inHg over the last 24 hours.

When is the best time to visit Isahaya?

The best time to visit Isahaya is in October: highs of 75 °F, about 7 rainy days a month and 6 hours of sunshine a day.

What is the weather like in Isahaya in October?

In October, Isahaya normally sees highs of 75 °F and lows of 59 °F, with about 7 rainy days (3.61 in for the month) and 6 hours of sunshine a day. The sea is around 75 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Isahaya?

The warmest is August, with average highs of 89 °F, and the coldest January, with lows of 36 °F. The wettest is June (14.08 in) and the driest, January.

When is typhoon season in Isahaya?

Typhoon season: from July to September. In the last 30 years (1996–2025), 31 tropical cyclones passed within 93 mi of Isahaya, one or two a year; 17 of them with hurricane-force winds (74 mph or more). The most recent: Lingling, in August 2025.

More about Isahaya today

Weather near Isahaya

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 8:12 pm (local time).

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