Updated October 2026
Half Moon Bay State Beach: Weather by Month and When to Go
Half Moon Bay State Beach is part of the California state park system. The USGS Protected Areas Database maps about 200 acres under its name. Average highs range from 59°F in December and January to 66°F in August through October.
Average highs sit between 60°F and 80°F in February through November. They stay below 60°F in December and January. The figures are NOAA climate normals for 1991–2020, measured at a weather station 0.4 miles from the park.
Warmest average high
66°F
August through October
Coldest average low
43°F
December through February
Most precipitation
5.2 in
December
Longest days
14.6 h
June
Half Moon Bay State Beach weather by month
| Month | Average high | Average low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 59°F | 43°F | 5.1 in | 9.7 h |
| February | 60°F | 43°F | 4.7 in | 10.6 h |
| March | 60°F | 44°F | 3.7 in | 11.7 h |
| April | 61°F | 45°F | 1.8 in | 13.0 h |
| May | 62°F | 48°F | 1.0 in | 14.0 h |
| June | 64°F | 50°F | 0.4 in | 14.6 h |
| July | 65°F | 53°F | 0.1 in | 14.3 h |
| August | 66°F | 54°F | 0.2 in | 13.4 h |
| September | 66°F | 51°F | 0.2 in | 12.2 h |
| October | 66°F | 48°F | 1.3 in | 11.0 h |
| November | 63°F | 45°F | 2.4 in | 9.9 h |
| December | 59°F | 43°F | 5.2 in | 9.4 h |
Temperature and precipitation figures are NOAA climate normals for 1991–2020 from station USC00043714, the nearest station with a complete set of temperature normals, 0.4 miles from the park. Conditions in the park can differ from the station's, most of all where the two sit at different elevations. Daylight is calculated for the park's latitude at the middle of each month. The acreage is what the USGS Protected Areas Database maps under the park's name. The state's own figure can differ, because the database may hold part of a park under another name.
What the averages show
- Temperature. August through October are the warmest months, each with an average high of 66°F. December through February are the coldest months, each with an average low of 43°F.
- Precipitation. December is the wettest month, averaging 5.2 inches of precipitation, and July is the driest, at 0.1 inches. An average year brings about 26.1 inches in total.
- Snowfall. The station's snowfall normal is 0.0 inches in every month.
- Daylight. Days run from about 9.4 hours of daylight in December to 14.6 hours in June.
Camping, trails, maps and fees
Whether Half Moon Bay State Beach has camping or cabins, where its trails run, when it opens and what it charges are all published by the agency that runs the park. Its official page is the place to check before a trip.
Official Half Moon Bay State Beach page
For the forecast rather than the averages, the National Weather Service issues a point forecast for the park's location.
National Weather Service forecast for Half Moon Bay State Beach
Where to stay near Half Moon Bay State Beach
Hotels, cabins and vacation rentals near Half Moon Bay State Beach, with live availability and prices.
Top-rated places to stay near Half Moon Bay State Beach
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Half Moon Bay State Beach?
Get lodging deals near Half Moon Bay State Beach by email. No spam, unsubscribe anytime.
Frequently Asked Questions
August through October are the warmest months, each with an average high of 66°F. December through February are the coldest months, each with an average low of 43°F. These are NOAA 1991–2020 climate normals from a weather station 0.4 miles from the park.
Average highs sit between 60°F and 80°F in February through November. They stay below 60°F in December and January.
December is the wettest month, averaging 5.2 inches of precipitation, and July is the driest, at 0.1 inches. An average year brings about 26.1 inches in total. The station's snowfall normal is 0.0 inches in every month.
Days run from about 9.4 hours of daylight in December to 14.6 hours in June. The hours are calculated for the park's latitude.
Nearest National Park Service sites
- Fort Point National Historic Site23 miles away
- San Francisco Maritime National Historical Park23 miles away
- Golden Gate National Recreation Area28 miles away
Nearby state parks
- Montara State Beach7 miles away
- Gray Whale Cove State Beach7 miles away
- San Gregorio State Beach11 miles away
- Thornton State Beach16 miles away
Distances are measured in a straight line from the park, so the drive is longer.
Sources: NOAA NCEI U.S. Climate Normals 1991–2020; USGS Protected Areas Database for location and acreage; the official California state park listing for the park's name.