Weather in Oahu: August
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Average day temperature: | 81.8°F |
| Average night temperature: | 74.1°F | |
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Sea water temperature: | 79.7°F |
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Number of sunny days: | 5 days |
| Day length: | 12.6 - 13.1 hours | |
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Number of rainy days: | 0 days |
| Precipitation totals: | 0.2 in. | |
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forecast
| Oahu |
temperature
| Oahu |
Air temperature in August, °F
The highest day temperature during August of 2026 was 83°F. At the same time the lowest night temperature was 68°F. Daily and nightly averages during August were 79.6°F and 72.2°F.
Sea water temperature in Oahu in August, °F
The average sea water temperature in August of 2026 was 80.3°F. The highest and lowest sea temperatures during the month were 81.0°F and 79.7°F.
Mostly all days in August are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in August, in.
Precipitation total value in Oahu in August is 0.2 in. Other months of the year show relatively similar values.
The average wind speed value in August is 11.0 mph
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 6.5.
Best time for vacation in Oahu
Oahu on a weather map
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