Our Proprietary 10-Day Forecast

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Current warnings over Half Moon Bay, California
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<p>Warnings from F5Weather</a></div>

United States weather warnings are issued by various organizations under NOAA. Most from the National Weather Service, but also Storm Prediction Center and National Hurricane Center.

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Current radar over Half Moon Bay, California red dot
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<p>Live radar from F5Weather</a></div>

Our radar is based off of US NEXRAD and Canadian weather radar sites through the quality controlled MRMS system. It compiles various sources for radar data and filters out erroneous returns such as sun spikes and ground clutter. We then colorize the precipitation based on our methods for determining precipitation type. Rain is in shades of green, mixed precipitation and freezing rain in shades of pink and snow is in shades of blue.

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Current satellite over Half Moon Bay, California red dot
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<p>Live satellite from F5Weather</a></div>

Our satellite is from the GOES-16. It is color enhanced by using a geocolor terrain background during the day and black marble city lights at night. The daytime satellite data is Visible satellite imagery, and nighttime uses Infrared bands. The bluish clouds are fog and low cloud. The whiteest clouds are the coldest, highest cloud tops.

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Current surface weather map around San Mateo County, CA

This surface map is from the HRRR computer model. It is a 1-hour forecast, updated hourly, which is a good estimate of the current surface conditions. This map shows the current high and low pressure centers, pressure isobar contours, wind streamlines and thickness contours. It also shows the currently depicted preciptiation estimates, although this should not be a substitute for actual live radar. The purple dashed contour is the 5400m thickness line, which is often a good proxy for the rain/snow line.

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Temperatures right now near Half Moon Bay, California

This is the latest surface temperatures as depicted by the HRRR computer model, updated hourly. Although these are not actual observations, this model is a very good representation of current conditions as it factors in observations, terrain and physics to give you more detailed temperatures in areas that do not have reporting weather stations. For the latest reports at specific locations, like in Half Moon Bay, CA please see our current conditions data on the left and right side of this page, or go to our current conditions page.

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Surface wind speed map over Half Moon Bay, CA

This map shows the latest HRRR computer model winds. This depiction of the current wind directions and speeds is an estimate from the computer model. For actual observations in Half Moon Bay, CA, see the current conditions data on the left and right side of this page, or go to our current conditions page.

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Regional 24 hour rainfall expected near Half Moon Bay, California

This is a forecast of the amount of precipitation expected over the next 24 hours from the HRRR weather forecast model. This is only one forecast depiction, and you should check other models to get a better idea of what may happen. You can view this and other models in more detail on our main weather forecast maps page. There, you will also be able to look at forecasts beyond just 24 hours and look at forecasts out to as far as 16 days.

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Area snowfall accumulation expected around San Mateo County, California

This is snowfall forecast, with amounts anticipated in the next 24 hours. This guidance is from the HRRR weather model. For more model forecasts out to 16 days, visit our main weather forecast maps page.

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These are Convective Outlooks from the Storm Prediction Center. Click to see Days 1-3 broken down into Tornado, Wind and Hail threats, as well as days 5-8 outlooks.

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Atlantic Hurricane and Tropical Storm Tracking Map
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<p>Hurricane Tracking from F5Weather</a></div>

Our hurricane tracking map monitors for any current or forecast tropical disturbances in the Atlantic. (See our Pacific Hurricane Tracker) Various hurricane models will draw a 'spaghetti plot' in the Atlantic Basin when a disturbance is forecast or exists, showing the system's forecast track. Once a storm has developed, the National Hurricane Center will forecast their official track. This will show up on the map along with the storm's current intensity, track and name. We will also plot some of the storm's vitals and of course the spaghetti plots from the models along with the NHC forecast track will give you an idea of where it's heading, and its forecast intensity with time.

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To view the latest computer models, visit f5wx.com for access to the weather maps and guidance that meteorologists use to make their forecasts.
 
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  • 3-Ensemble Mean & more!
View Skew-T soundings, textual data tables for your location, and of course maps! Weather forecast maps of the basics like temperature, wind, pressure, humidity, dew point, cloud cover, simulated radar, travel weather, rainfall and snow are available. More advanced users can also get use out of our severe weather & tornado threat maps, as well as upper air & shear graphics.
 
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Climate Summary
(made with AI, use with caution)
Half Moon Bay, CA Climate Summary

General Climate

    •   Half Moon Bay, California experiences a mild, Mediterranean climate with warm, dry summers and cool, wet winters.
    •   The city is located on the coast, which helps to moderate temperatures and provide a consistent climate year-round.
    •   Half Moon Bay is known for its beautiful beaches, rolling hills, and stunning views of the Pacific Ocean.

Temperature

    •   Average annual temperature: 54.8°F (12.7°C)
    •   Average summer temperature (June-August): 63.8°F (17.7°C)
    •   Average winter temperature (December-February): 44.9°F (7.2°C)
    •   Record high temperature: 104°F (40°C)
    •   Record low temperature: 19°F (-7°C)

Precipitation

    •   Average annual precipitation: 22.8 inches (579 mm)
    •   Average number of rainy days per year: 90
    •   Most precipitation occurs during the winter months, with an average of 4.5 inches (114 mm) of rain in January.
    •   The summer months are typically dry, with an average of only 0.2 inches (5 mm) of rain in July.

Humidity

    •   Average annual humidity: 78%
    •   Humidity levels are highest during the winter months, with an average of 85% in January.
    •   Humidity levels are lowest during the summer months, with an average of 70% in July.

Wind

    •   Average annual wind speed: 10 mph (16 km/h)
    •   The windiest month is April, with an average wind speed of 12 mph (19 km/h).
    •   The calmest month is September, with an average wind speed of 8 mph (13 km/h).

Sunshine

    •   Average annual sunshine: 2,600 hours
    •   The sunniest month is July, with an average of 11 hours of sunshine per day.
    •   The cloudiest month is December, with an average of only 5 hours of sunshine per day.

Overall, Half Moon Bay, CA has a mild, Mediterranean climate with warm, dry summers and cool, wet winters. The city is known for its beautiful beaches, rolling hills, and stunning views of the Pacific Ocean.

Facts & Historical Information
(made with AI, use with caution)
Natural History

    •   Half Moon Bay's crescent-shaped shoreline was formed by the San Andreas Fault.

    •   The bay is home to a diverse marine ecosystem, including sea lions, harbor seals, and whales.

    •   The Fitzgerald Marine Reserve protects a rich underwater habitat, including kelp forests and tide pools.

Science

    •   The University of California, Santa Cruz's Long Marine Lab is located in Half Moon Bay, conducting cutting-edge research on marine biology and oceanography.

    •   The city is home to the Half Moon Bay Earthquake Research Center, which studies earthquakes along the San Andreas Fault.

Personalities

    •   Pedro Fages, a Spanish explorer, named the bay \

Tourist Attractions
1.Half Moon Bay State Beach:

A picturesque beach with soft sand, rolling waves, and stunning coastal views. Perfect for sunbathing, swimming, surfing, and beachcombing.

2.Fitzgerald Marine Reserve:

A protected marine area with tide pools teeming with diverse marine life. Visitors can explore the intertidal zone, observe sea anemones, starfish, and other fascinating creatures.

3.Pillar Point Harbor:

A bustling harbor with a historic lighthouse, fishing boats, and a variety of restaurants and shops. Visitors can enjoy scenic boat tours, watch fishermen unload their catch, or simply soak up the charming maritime atmosphere.

Nearby Cities:

El Granada, CA
Moss Beach, CAMontara, CA
Hillsborough, CASan Mateo, CA
Belmont, CABurlingame, CA
San Carlos, CAWoodside, CA
Millbrae, CARedwood City, CA
Foster City, CARedwood Shores, CA
Pacifica, CAPortola Valley, CA
San Bruno, CAAtherton, CA
San Jose, CA
Sacramento, CAOakland, CA
Stockton, CAFremont, CA
Modesto, CASanta Rosa, CA
Elk Grove, CAHayward, CA
Salinas, CASunnyvale, CA
Roseville, CA