Weather in Ko Olina

14-day forecast · updated today, Wednesday, October 28, at 5:38 pm (HST)

Now · overcast 77 °F

Feels like: 81 °F
Low / high: 76 / 78 °F
Rain: 100% · 2.11 in
Wind: 12 mph ENE

→ 29.85 inHg · steady

Today in Ko Olina: rain, 76 °F to 78 °F, with a 100% chance of rain (2.11 in) and a gentle breeze from the east-northeast (12 mph). Tomorrow, overcast, 77 °F to 81 °F and a 37% chance of rain. The warmest day of the week is Thursday 29, at 81 °F. No significant rain expected over the next 7 days.

Measured now at the airport

Kalaeloa (PHJR), 4.1 mi away · 45 min ago

Visibility9.9 mi or more

WeatherNothing to note

Temperature78 °F

Wind8 mph from the east-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

78° 76°
Today
81° 77°
Thu 29
80° 77°
Fri 30
80° 75°
Sat 31
80° 76°
Sun 1
79° 74°
Mon 2
78° 73°
Tue 3
78° 75°
Wed 4
79° 76°
Thu 5
80° 76°
Fri 6
80° 76°
Sat 7
80° 76°
Sun 8
79° 73°
Mon 9
79° 74°
Tue 10

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 28	Rain	76 / 78 °F	100% · 2.11 in	15 mph E	5.2 ft	5:32 am · 5:15 pm	ECMWF
Thu 29	Overcast	77 / 81 °F	37%	16 mph ENE	5.2 ft	6:26 am · 6:13 pm	ECMWF
Fri 30	Overcast	77 / 80 °F	8%	16 mph ENE	5.1 ft	7:29 am · 7:33 pm	ECMWF
Sat 31	Overcast	75 / 80 °F	16%	11 mph NE	4.7 ft	8:39 am · 9:27 pm	ECMWF
Sun 1	Overcast	76 / 80 °F	22%	16 mph NNE	6.0 ft	9:48 am · 11:07 pm	ECMWF
Mon 2	Mainly clear	74 / 79 °F	4%	18 mph NE	6.8 ft	10:49 am	ECMWF
Tue 3	Partly cloudy	73 / 78 °F	4%	18 mph ENE	6.0 ft	12:13 am · 11:41 am	ECMWF
Wed 4	Mainly clear	75 / 78 °F	4%	19 mph ENE	4.9 ft	1:02 am · 12:27 pm	ECMWF
Thu 5	Mainly clear	76 / 79 °F	3%	21 mph ENE	6.7 ft	1:42 am · 1:08 pm	ECMWF
Fri 6	Overcast	76 / 80 °F	0%	21 mph ENE	6.4 ft	2:19 am · 1:46 pm	ECMWF
Sat 7	Overcast	76 / 80 °F	2%	18 mph ENE	7.7 ft	2:53 am · 2:23 pm	ECMWF
Sun 8	Overcast	76 / 80 °F	2%	16 mph ENE	7.5 ft	3:26 am · 2:59 pm	ECMWF
Mon 9	Overcast	73 / 79 °F	2%	12 mph NNE	6.4 ft	3:59 am · 3:35 pm	ECMWF
Tue 10	Overcast	74 / 79 °F	2%	13 mph NE	13 ft	4:33 am · 4:12 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	Rain	Rain	Light rain	Rain	Heavy drizzle	Drizzle	Overcast	Overcast
Temperature	76°	76°	76°	76°	77°	77°	77°	77°
Chance of rain	100%	100%	100%	100%	98%	86%	55%	33%
Rain	0.30 in	0.15 in	0.08 in	0.11 in	0.05 in	0.02 in	0.00 in	0.00 in
Wind (mph)	4 N	8 ESE	12 E	7 ENE	7 E	10 E	13 ENE	16 ENE
Humidity	88%	89%	88%	86%	88%	87%	86%	83%
UV	0	0	0	0	1	2	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 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	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	78°	81°	80°	80°	80°	79°	78°
AIFS	78°	79°	79°	79°	78°	78°	78°
GFS	76°	83°	83°	84°	82°	80°	80°
ICON	80°	83°	83°	83°	83°	82°	81°
Confidence	high	high	high	high	medium	high	high

Do the models agree? · Rain
Rain	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	2.11 in	0	0	0	0	0	0
AIFS	1.81 in	0.04 in	0	0.05 in	0.09 in	0	0
GFS	0.59 in	0.04 in	0.02 in	0.00 in	0	0.00 in	0.01 in
ICON	0.54 in	0	0	0	0	0	0
Confidence	medium	medium	high	medium	medium	high	high

Do the models agree? · Wind
Wind (mph)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	1521	1621	1621	1117	1624	1824	1826
AIFS	14	15	16	12	22	21	19
GFS	59	816	714	510	1323	2124	1923
ICON	512	819	1022	615	1125	1226	1226
Confidence	medium	medium	medium	medium	medium	medium	medium

Chance of rain from the ensemble models

Model	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF (51 scenarios)	100%	37%	8%	16%	22%	4%	4%
GFS (GEFS, 31 scenarios)	100%	87%	55%	27%	32%	39%	33%

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, drier and a slightly cooler sea.

Next 6 weeks

When	TemperatureTemp.	Rain	Sea	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	A bit below −1.4 °F	Below −63%	A bit below −0.7 °F	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal −0.7 °F	Below −57%	A bit below −0.7 °F	77° / 75°
Nov 16 – Nov 22Nov 16–Nov 22	Normal −0.5 °F	Below −72%	A bit below −0.5 °F	77° / 75°
Nov 23 – Nov 29Nov 23–Nov 29	Normal −0.5 °F	Below −70%	Normal −0.4 °F	77° / 74°
Nov 30 – Dec 6Nov 30–Dec 6	Normal −0.4 °F	Below −71%	Normal −0.4 °F	76° / 74°

Coming months

When	TemperatureTemp.	Rain	Sea
November	Normal +0.7 °F	Normal	A bit above +0.9 °F
December	Normal +0.5 °F	Below −58%	A bit above +0.7 °F
January	Normal −0.2 °F	Below −66%	Normal +0.4 °F
February	Normal −0.4 °F	Below −60%	Normal +0.2 °F
March	Normal −0.4 °F	Below −69%	Normal −0.2 °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.

Ko Olina climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Ko Olina is from April to September: highs of 80 °F to 86 °F, about 4 rainy days a month and 8 hours of sunshine a day.

Tropical cyclones rarely pass near Ko Olina: 2 within 93 mi in the last 30 years (1996–2025), most recently Douglas, in July 2020.

79° 65°

JanJ
79° 65°

FebF
79° 66°

MarM
80° 68°

AprA
82° 69°

MayM
83° 71°

JunJ
84° 73°

JulJ
85° 73°

AugA
86° 72°

SepS
85° 71°

OctO
82° 69°

NovN
80° 67°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves
JanuaryJan	79°	65°	2.58 in	6	6.5	76°	7.1 ft
FebruaryFeb	79°	65°	1.93 in	7	7.0	75°	7.1 ft
MarchMar	79°	66°	3.15 in	8	7.1	75°	6.7 ft
AprilApr	80°	68°	1.57 in	5	8.1	76°	5.7 ft
MayMay	82°	69°	2.52 in	5	8.4	77°	5.0 ft
JuneJun	83°	71°	1.36 in	4	9.0	78°	4.9 ft
JulyJul	84°	73°	2.75 in	4	8.7	79°	4.8 ft
AugustAug	85°	73°	2.24 in	3	8.4	80°	4.6 ft
SeptemberSep	86°	72°	2.33 in	5	7.9	81°	4.9 ft
OctoberOct	85°	71°	3.14 in	7	7.3	80°	5.6 ft
NovemberNov	82°	69°	1.95 in	9	6.5	79°	6.5 ft
DecemberDec	80°	67°	2.89 in	8	6.2	77°	7.0 ft

Month	Water	Waves
Jan	76°	7.1 ft
Feb	75°	7.1 ft
Mar	75°	6.7 ft
Apr	76°	5.7 ft
May	77°	5.0 ft
Jun	78°	4.9 ft
Jul	79°	4.8 ft
Aug	80°	4.6 ft
Sep	81°	4.9 ft
Oct	80°	5.6 ft
Nov	79°	6.5 ft
Dec	77°	7.0 ft

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

A normal year brings 28.41 in of rain on about 71 days and about 2,800 hours of sunshine.

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

Now77 °Ffeels like 81 °F

Tomorrow77 / 81 °F

It's 77 °F now (feels like 81 °F). Today, 76 °F to 78 °F; tomorrow, 77 °F to 81 °F.

Chance of rain

Today 100% 2.11 in
Thu 29 37%
Fri 30 8%
Sat 31 16%
Sun 1 22%
Mon 2 4%
Tue 3 4%

Today the chance of rain reaches 100%, with 2.11 in in total. No significant rain expected this week.

Recent rain: last 24 hours, 3.04 in; last 3 days, 3.50 in; last 7 days, 3.50 in.

Humidity and dew point

Humidity86%

Dew point72 °F

Humidity is 86% now and the dew point is 72 °F. With a dew point this high, it feels muggy.

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

Clouds94%

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

UV index

Now0

Today's peak2low

Thu 29: 3 · Fri 30: 8 · Sat 31: 8

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

29.8029.9030.00 29.96

Steady now (+0.00 inHg in 3 hours). Over the next 48 hours: +0.06 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityGood · 18

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
Tue 27	Rain	74 / 78 °F	1.38 in	11 mph NE
Mon 26	Overcast	77 / 79 °F	0	15 mph NE
Sun 25	Overcast	76 / 79 °F	0	20 mph NNE
Sat 24	Overcast	77 / 80 °F	0	14 mph NNE
Fri 23	Overcast	77 / 81 °F	0	13 mph NE
Thu 22	Overcast	77 / 79 °F	0	17 mph ENE
Wed 21	Clear sky	78 / 81 °F	0	17 mph ENE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Tue 20	Overcast	78 / 80 °F	0	21 mph ENE
Mon 19	Partly cloudy	78 / 81 °F	0	21 mph ENE
Sun 18	Clear sky	77 / 82 °F	0	20 mph ENE
Sat 17	Mainly clear	78 / 82 °F	0	20 mph ENE
Fri 16	Mainly clear	78 / 82 °F	0	17 mph ENE
Thu 15	Light drizzle	79 / 82 °F	0.01 in	17 mph ENE
Wed 14	Clear sky	77 / 81 °F	0	15 mph ENE
Tue 13	Clear sky	78 / 82 °F	0	15 mph ENE
Mon 12	Mainly clear	78 / 81 °F	0	13 mph E
Sun 11	Overcast	78 / 80 °F	0	15 mph E
Sat 10	Light drizzle	79 / 83 °F	0.02 in	14 mph E
Fri 9	Light drizzle	78 / 82 °F	0.01 in	9 mph SE
Thu 8	Rain	76 / 80 °F	1.78 in	28 mph S
Wed 7	Drizzle	77 / 81 °F	0.14 in	13 mph SE
Tue 6	Overcast	76 / 80 °F	0	10 mph ENE
Mon 5	Mainly clear	78 / 83 °F	0	16 mph ENE
Sun 4	Overcast	78 / 83 °F	0	17 mph ENE
Sat 3	Partly cloudy	79 / 81 °F	0	16 mph E
Fri 2	Drizzle	79 / 82 °F	0.14 in	17 mph SE
Thu 1	Drizzle	78 / 82 °F	0.39 in	19 mph SE
Wed 30	Drizzle	78 / 81 °F	0.30 in	23 mph SE
Tue 29	Drizzle	80 / 81 °F	0.13 in	21 mph ESE
Mon 28	Overcast	80 / 82 °F	0	22 mph E

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 Ko OlinaQuestions

What's the weather like today in Ko Olina?

Rain, from 76 °F to 78 °F, with a gentle breeze from the east-northeast (12 mph) and a 100% chance of rain.

Will it rain tomorrow in Ko Olina?

On Thursday 29 the chance of rain is 37% (0.00 in): overcast.

How warm will it be this week?

Between a low of 73 °F and a high of 81 °F; the warmest day, Thursday 29.

What's the UV index today?

It reaches 2 (low). No special protection needed.

Is the pressure rising or falling?

It's 29.85 inHg and steady: −0.05 inHg over the last 24 hours.

When is the best time to visit Ko Olina?

The best time to visit Ko Olina is from April to September: highs of 80 °F to 86 °F, about 4 rainy days a month and 8 hours of sunshine a day.

What is the weather like in Ko Olina in October?

In October, Ko Olina normally sees highs of 85 °F and lows of 71 °F, with about 7 rainy days (3.14 in for the month) and 7 hours of sunshine a day. The sea is around 80 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Ko Olina?

The warmest is September, with average highs of 86 °F, and the coldest February, with lows of 65 °F. The wettest is March (3.15 in) and the driest, June.

More about Ko Olina today

Weather near Ko Olina

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 10 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 5:38 pm (local time).

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