Oahu Weather Forecast
Oahu weather: 75°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Will it rain in Oahu?
Yes - rain is likely in Oahu today.
A 98% chance means rain is expected over most of the area. Plan indoor alternatives.
Over the next 7 days, about 0,7 in of precipitation is forecast, with the wettest days falling on Thu, Fri, Sat, Sun, Mon, Tue and Wed.
The next 7 days carry about 3.2 times a normal week's rain for August (0,7 in against 0,2 in).
16-day forecast for Oahu
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Thu, Aug 20 | 🌦️ Drizzle | 87° / 69° | 98% · 0,1 in | 7 mph | 9 |
| Fri, Aug 21 | 🌧️ Heavy drizzle | 87° / 72° | 100% · 0,1 in | 8 mph | 9 |
| Sat, Aug 22 | 🌦️ Light drizzle | 85° / 74° | 82% · 0,0 in | 15 mph | 9 |
| Sun, Aug 23 | 🌦️ Light drizzle | 84° / 74° | 95% · 0,1 in | 17 mph | 8 |
| Mon, Aug 24 | 🌦️ Light showers | 82° / 74° | 96% · 0,3 in | 11 mph | 8 |
| Tue, Aug 25 | 🌦️ Light drizzle | 84° / 74° | 87% · 0,1 in | 10 mph | 9 |
| Wed, Aug 26 | ☁️ Overcast | 82° / 72° | 57% | 11 mph | 9 |
| Thu, Aug 27 | 🌦️ Light drizzle | 82° / 71° | 50% · 0,0 in | 9 mph | 8 |
| Fri, Aug 28 | 🌦️ Light drizzle | 83° / 70° | 49% · 0,1 in | 10 mph | 8 |
| Sat, Aug 29 | 🌦️ Light drizzle | 82° / 70° | 56% · 0,1 in | 12 mph | 7 |
| Sun, Aug 30 | 🌦️ Light drizzle | 82° / 70° | 76% · 0,0 in | 10 mph | 9 |
| Mon, Aug 31 | 🌦️ Light drizzle | 83° / 72° | 79% · 0,1 in | 10 mph | 7 |
| Tue, Sep 1 | 🌦️ Light drizzle | 85° / 71° | 81% · 0,1 in | 8 mph | 2 |
| Wed, Sep 2 | 🌦️ Light drizzle | 84° / 73° | 78% · 0,1 in | 12 mph | 4 |
| Thu, Sep 3 | 🌦️ Light drizzle | 82° / 73° | 74% · 0,1 in | 14 mph | 7 |
| Fri, Sep 4 | 🌦️ Light drizzle | 83° / 74° | 48% · 0,2 in | 11 mph | 9 |
What this means for Oahu
Today is about average for August. The forecast high of 87°F is in line with the 85°F typical for this month.
A 98% chance means rain is expected over most of the area. Plan indoor alternatives.
Wet roads are likely; braking distances roughly double in heavy rain.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 40°F - an unusually even climate through the year.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- 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 January, March and April - historically the least comfortable months here.
See the Oahu forecast by time range
Oahu weather - more answers
Explore Oahu
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Frequently asked questions
Where is Oahu?
Oahu is an island in Hawaii. Its coordinates are 21.4389, -158.0001. It lies in North America.
What is the weather like in Oahu right now?
It is currently 75°F (24°C) with overcast. Humidity is 97% and wind is 3 mph.
When is the best time to visit Oahu?
June, July, August, September, October and November offer the most comfortable conditions in Oahu, which has a Mediterranean climate. January, March and April are usually the hardest months for outdoor plans.
What time zone is Oahu in?
Oahu observes Pacific/Honolulu (UTC-10:00). The local time is 12:51 AM.
What is the nearest airport to Oahu?
The closest airports are Daniel K. Inouye International Airport (HNL), 9 mi away.
What are the top things to do in Oahu?
Popular options include Pearl Harbor National Memorial, Waikiki Beach, Kauai, Hanalei Bay, Maui and Haleakala National Park.
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 August 21, 2026 at 12:51 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
