Hawaii County Weather Forecast for October 17, 2025
A relatively unstable moderate to locally breezy trade wind weather pattern will continue into Saturday.
An upper low centered just NW of Kauai, along with other factors, will influence the weather.
Tonight:
- Cloudy with occasional showers.
- Lows 66 to 72 near the shore to 52 to 59 at 4000 feet.
Friday:
- Cloudy with showers likely.
- Highs 80 to 86 near the shore to around 68 at 4000 feet.
- Showers likely in the evening, then occasional showers after midnight.
- Lows 66 to 72 near the shore to 53 to 60 at 4000 feet.
Forecast:
- Isolated showers in the morning, then scattered showers in the afternoon.
- Highs 84 to 89 near the shore to around 68 near 5000 feet.
- Isolated showers in the evening.
- Lows 71 to 76 near the shore to around 53 near 5000 feet.
- Lows 65 to 74 near the shore to 56 to 64 near 3000 feet.
- Highs around 82 near the shore to 70 to 79 near 3000 feet.
Friday Night:
- Cloudy with showers likely.
Author's summary: Unstable weather pattern expected.
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Big Island Now — 2025-10-17