Weather WorldPort Costa, CA 7-Day Night Weather Forecast
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Port Costa, CA Weather Forecast
Port Costa, CA Weather Forecast Date: 902 PM PDT Fri Oct 30 2026
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Rest of Tonight... Partly cloudy late in the evening then becoming mostly cloudy. Lows near 50. Light winds.
Saturday... Mostly cloudy. Patchy fog in the morning. Highs in the mid 60s. Southwest winds 5 to 10 mph.
Saturday Night... Mostly cloudy in the evening then becoming partly cloudy. Patchy fog after midnight. A chance of showers after midnight. Lows in the upper 40s. West winds up to 5 mph in the evening...Becoming light.
Sunday... Partly cloudy in the morning then becoming sunny. Areas of fog in the morning. Highs in the mid 60s. Northwest winds 5 to 10 mph.
Sunday Night... Clear. Lows in the mid 40s. Northwest winds 5 to 10 mph.
Monday... Sunny in the morning then becoming partly cloudy. Highs in the upper 60s.
Monday Night... Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 40s.
Tuesday... Partly cloudy. A slight chance of rain. Highs in the upper 60s.
Tuesday Night... Mostly cloudy. Lows in the upper 40s.
Wednesday... Partly cloudy. Highs in the upper 60s. Lows in the upper 40s.
Wednesday Night... Partly cloudy. Highs in the upper 60s. Lows in the upper 40s.
Thursday... Mostly cloudy in the morning then becoming partly cloudy. Patchy fog. A slight chance of rain. Highs in the mid 60s.
Thursday Night... Partly cloudy. Lows in the mid 40s to lower 50s. Highs in the upper 60s.
POP = Probability of Precipitation
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