Kauai Weather Forecast
Kauai weather: 67°F, light drizzle. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
Kauai is an island in Hawaii. Kauai is an island known for the Na Pali Coast and Waimea Canyon.
Right now it is 67°F (20°C) in Kauai with light drizzle. It feels like 72°F. Today runs from 66°F to 73°F. Chance of precipitation is 87%. Sightseeing conditions score 5.1/10 - marginal.
The best time to visit Kauai is August, September and October. The climate is temperate. March, November and December tend to be the least comfortable months. August is the warmest month with average highs near 75°F, while February is the coldest with lows near 55°F.
The closest major airport is Daniel K. Inouye International Airport (HNL), about 116 mi away. Nearby highlights include Hanalei Bay, Oahu, Pearl Harbor National Memorial and Waikiki Beach.
In plain terms. Today is about average for September. The forecast high of 73°F is in line with the 74°F typical for this month. The best window to be outside is roughly 3 PM to 6 PM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Kauai today at 9.6/10. Visibility is down to 0,1 mi - use low beams and leave extra following distance. Wet roads are likely; braking distances roughly double in heavy rain.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Weather in Kauai right now
Source: Open-Meteo. Updated 6:49 PM, Sep 20 local time.
See the Kauai forecast by time range
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for Kauai
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Sun, Sep 20 | 🌧️ Heavy drizzle | 73° / 66° | 87% · 0,5 in | 7 mph | 8 |
| Mon, Sep 21 | 🌦️ Light drizzle | 73° / 64° | 33% · 0,1 in | 6 mph | 8 |
| Tue, Sep 22 | 🌦️ Drizzle | 77° / 63° | 81% · 0,2 in | 5 mph | 9 |
| Wed, Sep 23 | 🌦️ Light drizzle | 77° / 66° | 82% · 0,1 in | 6 mph | 8 |
| Thu, Sep 24 | 🌦️ Light showers | 70° / 66° | 93% · 1,0 in | 5 mph | 5 |
| Fri, Sep 25 | 🌦️ Light showers | 71° / 66° | 93% · 0,9 in | 7 mph | 5 |
| Sat, Sep 26 | 🌦️ Light showers | 71° / 65° | 96% · 1,0 in | 7 mph | 7 |
| Sun, Sep 27 | 🌦️ Light showers | 72° / 64° | 87% · 0,8 in | 6 mph | 5 |
| Mon, Sep 28 | 🌧️ Heavy drizzle | 73° / 64° | 80% · 0,6 in | 6 mph | 8 |
| Tue, Sep 29 | 🌧️ Heavy drizzle | 71° / 62° | 77% · 0,4 in | 6 mph | 8 |
| Wed, Sep 30 | 🌦️ Drizzle | 71° / 62° | 78% · 0,4 in | 5 mph | 5 |
| Thu, Oct 1 | 🌦️ Drizzle | 70° / 61° | 85% · 0,3 in | 5 mph | 4 |
| Fri, Oct 2 | 🌦️ Light drizzle | 74° / 61° | 68% · 0,0 in | 6 mph | 8 |
| Sat, Oct 3 | ☁️ Overcast | 75° / 60° | 68% | 6 mph | 7 |
| Sun, Oct 4 | 🌦️ Light drizzle | 73° / 60° | 84% · 0,1 in | 6 mph | 5 |
| Mon, Oct 5 | 🌦️ Light drizzle | 69° / 62° | 52% · 0,2 in | 9 mph | 4 |
Climate in Kauai month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 69° | 56° | 7,6 in | ★★★☆☆ |
| February | 68° | 55° | 9,2 in | ★★★☆☆ |
| March | 69° | 58° | 12,6 in | ★★☆☆☆ |
| April | 70° | 59° | 17,3 in | ★★★☆☆ |
| May | 70° | 60° | 13,5 in | ★★★☆☆ |
| June | 72° | 62° | 10,1 in | ★★★☆☆ |
| July | 73° | 62° | 11,7 in | ★★★☆☆ |
| August | 75° | 64° | 7,2 in | ★★★☆☆ |
| September | 74° | 63° | 7,7 in | ★★★☆☆ |
| October | 74° | 62° | 6,9 in | ★★★☆☆ |
| November | 71° | 60° | 9,8 in | ★★☆☆☆ |
| December | 70° | 58° | 9,6 in | ★★☆☆☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Weather map for Kauai
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in Kauai
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit Kauai
Go in August, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: March, November and December - expect the least comfortable mix of heat, cold or rain.
Weather by beach in Kauai
1 beaches mapped in this atlas
Explore Kauai
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Kauai?
Kauai is an island in Hawaii. Its coordinates are 22.0964, -159.5261. It lies in North America.
What is the weather like in Kauai right now?
It is currently 67°F (20°C) with light drizzle. Humidity is 99% and wind is 4 mph.
When is the best time to visit Kauai?
August, September and October offer the most comfortable conditions in Kauai, which has a temperate climate. March, November and December are usually the hardest months for outdoor plans.
What time zone is Kauai in?
Kauai observes Pacific/Honolulu (UTC-10:00). The local time is 6:49 PM.
What is the nearest airport to Kauai?
The closest airports are Daniel K. Inouye International Airport (HNL), 116 mi away.
What are the top things to do in Kauai?
Popular options include Hanalei Bay, Oahu, Pearl Harbor National Memorial, Waikiki Beach, Maui and Haleakala National Park.
What places are in Kauai?
Kauai covers 1 places in this atlas, including Hanalei Bay.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (islands) - 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 September 20, 2026 at 6:49 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
