Oahu Climate and Average Weather
Climate of Oahu: average temperatures, rainfall and seasons month by month.
Climate in Oahu 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 | 77° | 64° | 4,3 in | ★★★★☆ |
| February | 76° | 63° | 2,2 in | ★★★★☆ |
| March | 78° | 66° | 6,0 in | ★★★☆☆ |
| April | 79° | 66° | 4,7 in | ★★★★☆ |
| May | 80° | 68° | 3,9 in | ★★★★☆ |
| June | 83° | 69° | 1,4 in | ★★★★★ |
| July | 83° | 71° | 1,7 in | ★★★★★ |
| August | 85° | 71° | 0,9 in | ★★★★★ |
| September | 85° | 71° | 1,1 in | ★★★★★ |
| October | 84° | 70° | 1,3 in | ★★★★☆ |
| November | 81° | 68° | 1,7 in | ★★★★☆ |
| December | 79° | 66° | 2,2 in | ★★★★☆ |
Climate type: Mediterranean. Source: Open-Meteo archive (ERA5).
Recent extremes in Oahu
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Oahu compares with nearby places
Annual averages, and the difference against Oahu.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Pearl Harbor National Memorial | 6 mi | 76°F | +35°F warmer | 27 in |
| Daniel K. Inouye International Airport | 9 mi | 75°F | +34°F warmer | 27 in |
| Honolulu | 13 mi | 75°F | +34°F warmer | 27 in |
| Honolulu County | 13 mi | 75°F | +34°F warmer | 27 in |
| Area Code 808 | 13 mi | 75°F | +34°F warmer | 27 in |
Best time to visit Oahu
Go in June, July, August, September, October and November. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, March and April - expect the least comfortable mix of heat, cold or rain.
What this means for Oahu
Today is about average for August. The forecast high of 85°F is in line with the 85°F typical for this month.
A 71% chance means rain is expected over most of the area. Plan indoor alternatives.
Gusts to 35 mph will push high-sided vehicles on exposed roads and bridges. 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 - 6 of the next 7 days carry a real chance of rain
- Avoid exposed ridgelines, small boats and rooftop viewpoints while gusts stay above 35 mph.
- If your dates are flexible, avoid January, March and April - historically the least comfortable months here.
Summary
Oahu is an island in Hawaii. Oahu is an island known for Waikiki, Pearl Harbor and the North Shore.
Right now it is 82°F (28°C) in Oahu with mainly clear. It feels like 85°F. Today runs from 73°F to 85°F. Chance of precipitation is 71%. Sightseeing conditions score 7.1/10 - good conditions.
The best time to visit Oahu is June, July, August, September, October and November. The climate is Mediterranean. January, March and April tend to be the least comfortable months. September is the warmest month with average highs near 85°F, while February is the coldest with lows near 63°F.
The closest major airport is Daniel K. Inouye International Airport (HNL), about 9 mi away. Nearby highlights include Pearl Harbor National Memorial, Waikiki Beach, Kauai and Hanalei Bay.
In plain terms. Today is about average for August. The forecast high of 85°F is in line with the 85°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. fishing is the strongest bet in Oahu today at 8.2/10. Gusts to 35 mph will push high-sided vehicles on exposed roads and bridges. 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.
Quick facts about Oahu
| Type | Island |
|---|---|
| State | Hawaii |
| Country | United States |
| Continent | North America |
| Coordinates | 21°26′20″N 158°0′0.4″W (21.4389, -158.0001) |
| Known for | Waikiki, Pearl Harbor and the North Shore |
| Local time | 8:37 PM (UTC-10:00) |
| Best months | June, July, August, September, October and November |
| Climate | Mediterranean |
Weather map for Oahu
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.
Explore Oahu
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
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 82°F (28°C) with mainly clear. Humidity is 69% and wind is 14 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 8:37 PM.
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 22, 2026 at 8:37 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
