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coastya
Satellite view of Kaʻōpala; the pin marks the beach
Satellite view: Sentinel-2 cloudless · EOX, CC BY 4.0, colour-adjusted by Coastya. About 6 km of coast; the pin marks the beach.

Beach

Kaʻōpala

United StatesHawaii · United States · Pacific Ocean

20.9820, -156.6734 · Napili-Honokowai, 1 km

  • 27°Sea · September
  • 28°High · September
  • 10.3 hSunshine · June
The dot marks Kaʻōpala. About 140 km of coast, north at the top.

Your month at the beach

Kaʻōpala in October

  • 27°CAir, daytime high25°C at night
  • 27°CSea temperature
  • 8.3 hSunshine a day
  • 11 daysRainy days in the month70 mm in total
  • 20 km/hAverage wind

Averages for 1991–2020. A rainy day is a day with at least 1 mm of rain.

The beach itself

No reliable information yet on: bathing water quality, wheelchair access, lifeguards.

Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.

October from 2020 to 2025

In October 2025 the sea averaged 27.1 °C — 0.4 °C above the 1991–2020 average.

Sea temperature 2025: +0.4 °C

1991–2020 average: 26.7 °C

Air, daytime high 2025: +0.7 °C

1991–2020 average: 27.4 °C

Each bar is one year. Above the dashed line (the 1991–2020 average), that month was warmer than usual; below it, cooler.

When to go

1991–2020 averages
Warmest seaSeptember and October27 °C
Most sunshineJune and July10 h of sun a day
Least rainJune and July39 mm in the month

The year at a glance

  1. Jan25°8 h83 mm
  2. Feb24°8 h79 mm
  3. Mar24°8 h107 mm
  4. Apr24°9 h59 mm
  5. May25°10 h52 mm
  6. Jun26°10 h39 mm
  7. Jul26°10 h40 mm
  8. Aug26°10 h49 mm
  9. Sep27°10 h51 mm
  10. Oct27°8 h70 mm
  11. Nov26°8 h82 mm
  12. Dec25°7 h86 mm
8°C20°C32°C

Each card is a month. The colour is the sea temperature, on the same scale as the map; in bold, the two best months for each.

Sea temperature

1991–2020 averages
24°25°26°27°JanFebMarAprMayJunJulAugSepOctNovDecJan: 25°Feb: 24°Mar: 24°Apr: 24°May: 25°Jun: 26°Jul: 26°Aug: 26°Sep: 27°Oct: 27°Nov: 26°Dec: 25°27°24°
8°C20°C32°C

Climate through the year

1991–2020 averages
22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDecJan: 23 °C (High 24° / Low 22°)Feb: 23 °C (High 24° / Low 22°)Mar: 23 °C (High 24° / Low 22°)Apr: 24 °C (High 25° / Low 22°)May: 25 °C (High 26° / Low 23°)Jun: 25 °C (High 27° / Low 24°)Jul: 26 °C (High 27° / Low 25°)Aug: 26 °C (High 28° / Low 25°)Sep: 26 °C (High 28° / Low 25°)Oct: 26 °C (High 27° / Low 25°)Nov: 25 °C (High 26° / Low 24°)Dec: 24 °C (High 25° / Low 23°)26°23°
AverageLow – High
8°C20°C32°C

Rain

0 mm50 mm100 mmJanFebMarAprMayJunJulAugSepOctNovDecJan: 83 mmFeb: 79 mmMar: 107 mm107Apr: 59 mmMay: 52 mmJun: 39 mm39Jul: 40 mmAug: 49 mmSep: 51 mmOct: 70 mmNov: 82 mmDec: 86 mm

Sunshine

0 h5 h10 hJanFebMarAprMayJunJulAugSepOctNovDecJan: 7.5 hFeb: 7.6 hMar: 7.8 hApr: 8.9 hMay: 9.9 hJun: 10.3 h10.3Jul: 10.2 hAug: 9.8 hSep: 9.5 hOct: 8.3 hNov: 7.5 hDec: 7.0 h7.0

Sunshine hours are estimated from measured solar radiation, not observed directly.

Month by month

1991–2020 averages

Every month at Kaʻōpala: air, sea, rain and sunshine. Averages for 1991–2020.

Every month at Kaʻōpala: air, sea, rain and sunshine. Averages for 1991–2020.
MonthHigh°CLow°CSea°CRainmmRainy daysdaysSunshineh/dayWindkm/h
January24222583107.519
February24222479107.620
March242224107127.820
April25222459108.922
May2623255299.920
June27242639910.324
July27252640910.224
August2825264989.824
Septemberwarmest sea2825275199.521
October27252770118.320
November26242682127.521
December25232586127.021

Swipe sideways to see the other columns.

Plan your trip

Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.

About these numbers

Averages are for 1991–2020; the recent years (2020–2025) are what actually happened. Neither is today's weather.

WhatWhere it comes from Nearest measurement
Air, rain and sunshineNASA POWER21 km away
Sea temperatureNOAA OISST v2.1, 1991–202013 km away
2020–2025, month by monthNASA POWER · NOAA OISST v2.121 km away
Lifeguards and places to stayOpenStreetMapwithin 1–5 km
Nearest airportOurAirportsstraight-line distance
Image at the topSentinel-2 cloudless (EOX)at this spot

See every data source →