Port Costa Weather Forecast 15 Days, Weather in Port Costa Today
Current weather conditions and 15 day weather forecast for Port Costa, California, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Port Costa
| 06 February 2026 Friday 12.2 ° C / 54°F  Clear |
Feels Like : 12.6 ° C / 54.6°F Humidity : % 86 Pressure : 1017 mb Wind Speed : 4 kmph / 2.5 miles from ENE  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Port Costa, CA, USA
Weather Forecast for next 15 Days for Port Costa including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Port Costa, California state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 05 February 2026 Thursday | Sunny |
8.4 ° C (47.1°F) |
19 ° C (66.2°F) |
13.1 ° C (55.6°F) |
% 87 | 0% | 0.6 | Sunrise:07:09 AM Sunset: 05:36 PM |
Moonrise:10:00 PM Moonset: 09:04 AM Moon Phase ( Waning Gibbous ) |
|
| 06 February 2026 Friday | Sunny |
10.8 ° C (51.4°F) |
21.5 ° C (70.7°F) |
14.8 ° C (58.6°F) |
% 80 | 0% | 0.5 | Sunrise:07:08 AM Sunset: 05:37 PM |
Moonrise:11:02 PM Moonset: 09:27 AM Moon Phase ( Waning Gibbous ) |
|
| 07 February 2026 Saturday |  Mist |
8.8 ° C (47.8°F) |
11.6 ° C (52.9°F) |
10 ° C (50°F) |
% 95 | 0% | 0.6 | Sunrise:07:07 AM Sunset: 05:39 PM |
Moonrise:No moonrise Moonset: 09:51 AM Moon Phase ( Waning Gibbous ) |
|
| 08 February 2026 Sunday | Mist |
8.5 ° C (47.3°F) |
12.1 ° C (53.8°F) |
10.3 ° C (50.5°F) |
% 96 | 0% | 0.7 | Sunrise:07:06 AM Sunset: 05:40 PM |
Moonrise:12:04 AM Moonset: 10:17 AM Moon Phase ( Waning Gibbous ) |
|
| 09 February 2026 Monday |  Partly Cloudy |
11.2 ° C (52.2°F) |
17.4 ° C (63.4°F) |
13.8 ° C (56.8°F) |
% 69 | 0% | 0.4 | Sunrise:07:05 AM Sunset: 05:41 PM |
Moonrise:01:06 AM Moonset: 10:48 AM Moon Phase ( Last Quarter ) |
|
| 10 February 2026 Tuesday |  Patchy rain nearby |
10.1 ° C (50.2°F) |
14.3 ° C (57.7°F) |
11.4 ° C (52.5°F) |
% 71 | 83% | 0 | Sunrise:07:04 AM Sunset: 05:42 PM |
Moonrise:02:07 AM Moonset: 11:25 AM Moon Phase ( Waning Crescent ) |
|
| 11 February 2026 Wednesday | Sunny |
8.3 ° C (47°F) |
15.9 ° C (60.7°F) |
11.6 ° C (52.8°F) |
% 71 | 0% | 4 | Sunrise:07:03 AM Sunset: 05:43 PM |
Moonrise:03:07 AM Moonset: 12:08 PM Moon Phase ( Waning Crescent ) |
|
| 12 February 2026 Thursday | Sunny |
6.8 ° C (44.3°F) |
16.1 ° C (61°F) |
11 ° C (51.8°F) |
% 67 | 0% | 4 | Sunrise:07:02 AM Sunset: 05:44 PM |
Moonrise:04:02 AM Moonset: 12:59 PM Moon Phase ( Waning Crescent ) |
|
| 13 February 2026 Friday | Patchy rain nearby |
6.4 ° C (43.5°F) |
13.4 ° C (56.2°F) |
9.5 ° C (49.1°F) |
% 72 | 0% | 2 | Sunrise:07:00 AM Sunset: 05:45 PM |
Moonrise:04:51 AM Moonset: 01:57 PM Moon Phase ( Waning Crescent ) |
|
| 14 February 2026 Saturday | Patchy rain nearby |
4.7 ° C (40.4°F) |
11.9 ° C (53.5°F) |
8 ° C (46.4°F) |
% 63 | 70% | 2 | Sunrise:06:59 AM Sunset: 05:46 PM |
Moonrise:05:34 AM Moonset: 03:00 PM Moon Phase ( Waning Crescent ) |
|
| 15 February 2026 Sunday |  Moderate rain |
3 ° C (37.4°F) |
7.7 ° C (45.8°F) |
5.6 ° C (42°F) |
% 93 | 89% | 2 | Sunrise:06:58 AM Sunset: 05:47 PM |
Moonrise:06:10 AM Moonset: 04:06 PM Moon Phase ( Waning Crescent ) |
|
| 16 February 2026 Monday | Patchy rain nearby |
4.2 ° C (39.5°F) |
9.7 ° C (49.5°F) |
6.5 ° C (43.6°F) |
% 84 | 0% | 2 | Sunrise:06:57 AM Sunset: 05:48 PM |
Moonrise:06:41 AM Moonset: 05:13 PM Moon Phase ( Waning Crescent ) |
|
| 17 February 2026 Tuesday | Sunny |
2.4 ° C (36.4°F) |
12.3 ° C (54.2°F) |
6.9 ° C (44.4°F) |
% 76 | 0% | 3 | Sunrise:06:56 AM Sunset: 05:50 PM |
Moonrise:07:09 AM Moonset: 06:20 PM Moon Phase ( New Moon ) |
|
| 18 February 2026 Wednesday | Sunny |
3.5 ° C (38.4°F) |
13.5 ° C (56.3°F) |
7.9 ° C (46.2°F) |
% 68 | 0% | 3 | Sunrise:06:54 AM Sunset: 05:51 PM |
Moonrise:07:34 AM Moonset: 07:28 PM Moon Phase ( Waxing Crescent ) |
|
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