Kauai County Weather Forecast
Kauai County weather: 67°F, light drizzle. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Will it rain in Kauai County?
Yes - rain is likely in Kauai County today.
A 51% chance means rain is likely somewhere nearby at some point - carry a layer, but do not cancel.
Over the next 7 days, about 2,3 in of precipitation is forecast, with the wettest days falling on Thu, Fri, Sat, Sun, Mon, Tue and Wed.
Rainfall over the next 7 days is close to normal for August (2,3 in against a typical 1,2 in).
16-day forecast for Kauai County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Thu, Aug 20 | 🌦️ Drizzle | 79° / 63° | 51% · 0,1 in | 5 mph | 9 |
| Fri, Aug 21 | 🌦️ Light showers | 75° / 64° | 69% · 0,4 in | 4 mph | 7 |
| Sat, Aug 22 | 🌦️ Drizzle | 78° / 67° | 43% · 0,2 in | 9 mph | 9 |
| Sun, Aug 23 | 🌧️ Heavy drizzle | 76° / 68° | 45% · 0,4 in | 7 mph | 9 |
| Mon, Aug 24 | 🌦️ Light showers | 71° / 67° | 88% · 0,7 in | 5 mph | 9 |
| Tue, Aug 25 | 🌦️ Drizzle | 74° / 67° | 90% · 0,5 in | 6 mph | 6 |
| Wed, Aug 26 | 🌦️ Light drizzle | 76° / 63° | 69% · 0,1 in | 6 mph | 8 |
| Thu, Aug 27 | ☁️ Overcast | 76° / 62° | 61% | 6 mph | 7 |
| Fri, Aug 28 | 🌦️ Drizzle | 74° / 62° | 75% · 0,2 in | 7 mph | 6 |
| Sat, Aug 29 | 🌦️ Drizzle | 74° / 63° | 90% · 0,4 in | 7 mph | 7 |
| Sun, Aug 30 | 🌦️ Drizzle | 75° / 63° | 87% · 0,4 in | 6 mph | 7 |
| Mon, Aug 31 | 🌦️ Drizzle | 74° / 65° | 82% · 0,5 in | 5 mph | 6 |
| Tue, Sep 1 | 🌦️ Light drizzle | 80° / 66° | 87% · 0,1 in | 6 mph | 2 |
| Wed, Sep 2 | 🌦️ Drizzle | 77° / 67° | 89% · 0,4 in | 7 mph | 1 |
| Thu, Sep 3 | 🌦️ Drizzle | 75° / 67° | 83% · 0,5 in | 7 mph | 5 |
| Fri, Sep 4 | 🌦️ Light showers | 74° / 67° | 47% · 0,5 in | 5 mph | 6 |
What this means for Kauai County
Today is slightly warmer than average for August. The forecast high of 79°F is 4°F above the 75°F typical for this month.
A 51% chance means rain is likely somewhere nearby at some point - carry a layer, but do not cancel.
Visibility is down to 0,1 mi - use low beams and leave extra following distance.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 39°F - an unusually even climate through the year.
What to pack, what to skip
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 7 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid March, November and December - historically the least comfortable months here.
See the Kauai County forecast by time range
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Frequently asked questions
Where is Kauai County?
Kauai County is a county in Hawaii. Its coordinates are 22.0964, -159.5261. It lies in North America.
What is the weather like in Kauai County right now?
It is currently 67°F (20°C) with light drizzle. Humidity is 100% and wind is 2 mph.
When is the best time to visit Kauai County?
August offer the most comfortable conditions in Kauai County, which has a temperate climate. March, November and December are usually the hardest months for outdoor plans.
What time zone is Kauai County in?
Kauai County observes Pacific/Honolulu (UTC-10:00). The local time is 8:45 PM.
How many people live in Kauai County?
Kauai County has a population of approximately 74.000.
What is the nearest airport to Kauai County?
The closest airports are Daniel K. Inouye International Airport (HNL), 116 mi away.
What are the top things to do in Kauai County?
Popular options include Kauai, Hanalei Bay, Oahu, Pearl Harbor National Memorial, Waikiki Beach and Maui.
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Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 20, 2026 at 8:45 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
