Half Moon Bay Weather Forecast 15 Days, Weather in Half Moon Bay Today
Current weather conditions and 15 day weather forecast for Half Moon Bay, 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 Half Moon Bay
| 19 December 2025 Friday 12.2 ° C / 54°F  Overcast |
Feels Like : 12.5 ° C / 54.4°F Humidity : % 100 Pressure : 1019 mb Wind Speed : 4.3 kmph / 2.7 miles from SSE  Visibility : 11 km Precipitation (rainfall) : 0.02 mm Cloud (%) : 100 |
15 day weather forecast for Half Moon Bay, CA, USA
Weather Forecast for next 15 Days for Half Moon Bay 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 Half Moon Bay, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 19 December 2025 Friday |  Moderate rain |
12 ° C (53.6°F) |
14.2 ° C (57.6°F) |
13 ° C (55.5°F) |
% 94 | 88% | 0.4 | Sunrise:07:20 AM Sunset: 04:54 PM |
Moonrise:07:23 AM Moonset: 04:26 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday |  Heavy rain |
12.6 ° C (54.7°F) |
14.4 ° C (57.9°F) |
13.6 ° C (56.5°F) |
% 97 | 89% | 0.1 | Sunrise:07:20 AM Sunset: 04:55 PM |
Moonrise:08:14 AM Moonset: 05:22 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Heavy rain |
13.1 ° C (55.6°F) |
14.4 ° C (57.8°F) |
13.8 ° C (56.9°F) |
% 96 | 75% | 0.1 | Sunrise:07:21 AM Sunset: 04:55 PM |
Moonrise:08:59 AM Moonset: 06:23 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Heavy rain |
10.9 ° C (51.7°F) |
15 ° C (59°F) |
13.9 ° C (57°F) |
% 94 | 89% | 0.2 | Sunrise:07:21 AM Sunset: 04:56 PM |
Moonrise:09:37 AM Moonset: 07:27 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Moderate rain |
13.5 ° C (56.3°F) |
15.6 ° C (60.1°F) |
14.1 ° C (57.5°F) |
% 87 | 83% | 0 | Sunrise:07:22 AM Sunset: 04:56 PM |
Moonrise:10:09 AM Moonset: 08:31 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday |  Patchy rain nearby |
10.8 ° C (51.5°F) |
13.8 ° C (56.8°F) |
12.6 ° C (54.7°F) |
% 78 | 75% | 3 | Sunrise:07:22 AM Sunset: 04:57 PM |
Moonrise:10:37 AM Moonset: 09:36 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Moderate rain |
11.5 ° C (52.6°F) |
13.4 ° C (56.1°F) |
12.9 ° C (55.2°F) |
% 81 | 88% | 3 | Sunrise:07:23 AM Sunset: 04:58 PM |
Moonrise:11:02 AM Moonset: 10:40 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Moderate rain |
10 ° C (50°F) |
11.2 ° C (52.1°F) |
10.8 ° C (51.5°F) |
% 85 | 87% | 3 | Sunrise:07:23 AM Sunset: 04:58 PM |
Moonrise:11:27 AM Moonset: 11:46 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Patchy rain nearby |
8.6 ° C (47.4°F) |
12.7 ° C (54.9°F) |
10.3 ° C (50.6°F) |
% 79 | 89% | 3 | Sunrise:07:23 AM Sunset: 04:59 PM |
Moonrise:11:51 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Patchy rain nearby |
7.9 ° C (46.2°F) |
12.8 ° C (55.1°F) |
10.6 ° C (51°F) |
% 75 | 73% | 3 | Sunrise:07:24 AM Sunset: 05:00 PM |
Moonrise:12:17 PM Moonset: 12:53 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday | Patchy rain nearby |
11.1 ° C (52°F) |
13.1 ° C (55.7°F) |
12.1 ° C (53.8°F) |
% 84 | 86% | 3 | Sunrise:07:24 AM Sunset: 05:00 PM |
Moonrise:12:48 PM Moonset: 02:04 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Patchy rain nearby |
9.6 ° C (49.3°F) |
11.5 ° C (52.7°F) |
10.9 ° C (51.6°F) |
% 88 | 85% | 3 | Sunrise:07:24 AM Sunset: 05:01 PM |
Moonrise:01:25 PM Moonset: 03:19 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Patchy rain nearby |
8.7 ° C (47.7°F) |
11.2 ° C (52.1°F) |
10 ° C (50°F) |
% 76 | 82% | 2 | Sunrise:07:24 AM Sunset: 05:02 PM |
Moonrise:02:10 PM Moonset: 04:36 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 January 2026 Thursday |  Partly Cloudy |
7.1 ° C (44.7°F) |
12 ° C (53.6°F) |
9.3 ° C (48.8°F) |
% 54 | 0% | 3 | Sunrise:07:25 AM Sunset: 05:03 PM |
Moonrise:03:08 PM Moonset: 05:53 AM Moon Phase ( Waxing Gibbous ) |
|
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