Hawaii County Weather Forecast for October 18 2025 Stay Informed on Local Conditions
The weather forecast for Hawaii County on October 18, 2025, indicates a varied pattern of showers, temperatures, and wind conditions across different locales.
Hilo Weather Forecast
In Hilo tonight, expect likely showers with lows ranging from 66 to 72 degrees Fahrenheit near the shore and 54 to 60 degrees at 4000 feet. Northwest winds may reach up to 10 mph, with a 100 percent chance of rain.
On Saturday, cloudy skies dominate with a high between 80 and 87 degrees along the shore and around 68 degrees at 4000 feet. Rain is likely in the morning, decreasing to scattered showers in the afternoon. The chance of rain stands at 70 percent.
Saturday night promises mostly cloudy skies with continued shower activity. Lows will be between 64 and 71 degrees near the shore and 51 to 58 degrees at 4000 feet. The chance of rain remains at 70 percent.
Kona Weather Forecast
Kona will experience mostly cloudy conditions this evening with isolated showers. Expect lows around 74 degrees near the shore and 54 degrees at 5000 feet. Rain chances are at 40 percent.
Saturday’s weather will be partly sunny with highs between 85 and 90 degrees. Scattered showers may occur in the afternoon, maintaining a 40 percent chance of rain.
Saturday night, the skies will be partly cloudy with isolated evening showers and lows ranging from 71 to 76 degrees near the shore to 50 to 55 degrees at 5000 feet. The rain chance drops to 20 percent.
Waimea and Kohala Forecast
Waimea will see breezy conditions tonight with scattered showers. Lows could vary from 66 to 74 degrees near the shore to 57 to 64 degrees near 3000 feet. The chance of rain is 50 percent.
On Saturday, partly sunny skies will prevail with highs around 82 degrees near the shore and temperatures from 71 to 80 degrees near 3000 feet. Breezy conditions with east winds of 10 to 25 mph are expected, along with a 50 percent chance of rain.
Kohala shares a similar forecast with breezy conditions and scattered showers tonight. Lows are expected between 66 to 74 degrees near the shore. The rain chance remains at 50 percent.
South Big Island Forecast
Tonight in South Big Island, mostly cloudy skies will occur with isolated evening showers. Lows are predicted to be 76 degrees near the shore and 56 degrees at 5000 feet. The chance of rain is 20 percent.
For Saturday, expect partly sunny skies, with breezy conditions contributing to highs around 87 degrees near the shore. Isolated afternoon showers may occur, maintaining a 20 percent chance of rain.
Puna and Waikoloa Weather Outlook
Puna will experience likely evening showers, with lows from 66 to 72 degrees near the shore and 54 to 60 degrees at 4000 feet. Rain chances remain near 100 percent.
Waikoloa’s forecast includes cloudy and breezy conditions tonight, with isolated showers. Lows are expected around 75 degrees near the shore and 54 degrees above 4000 feet. The chance of rain is 20 percent.
General Weather Patterns
- Moderate to locally strong trade winds expected throughout the region.
- Rainfall concentrated in windward and mauka areas, with the possibility of spreading to leeward regions.
- A small craft advisory remains in effect for several coastal waters.
Stay informed on local conditions and prepare for variability across Hawaii County as the weather evolves over the weekend.
