Live Weather & Forecast
Weather in Half Moon Bay
California, United States · Real-time conditions & 3-day outlook
12°C
Feels like 11°C
54°F / Feels 52°F
Overcast
Half Moon Bay, California
🌙 Nighttime
Updated: 2026-04-12 22:45
Humidity
100%
Wind
10.8 km/h W
Wind Gust
16.4 km/h
Pressure
1017 mb
Visibility
11 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
100%
Dew Point
7.8°C
Wind Degree
269°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
148.9 μg/m³
NO₂
13.7 μg/m³
O₃
67 μg/m³
SO₂
2.6 μg/m³
PM 2.5
8 μg/m³
PM 10
10 μg/m³
Today's Hourly Forecast
24-hour breakdown for Half Moon Bay, California
12 AM
11°
Partly Cloudy
1 AM
11°
Cloudy
2 AM
11°
Patchy rain nearby
3 AM
11°
Light rain
4 AM
11°
Overcast
5 AM
11°
Clear
6 AM
11°
Clear
7 AM
11°
Sunny
8 AM
11°
Patchy rain nearby
9 AM
11°
Moderate rain
10 AM
12°
Light rain
11 AM
13°
Light drizzle
12 PM
14°
Partly Cloudy
1 PM
14°
Cloudy
2 PM
14°
Partly Cloudy
3 PM
14°
Partly Cloudy
4 PM
15°
Partly Cloudy
5 PM
14°
Partly Cloudy
6 PM
14°
Partly Cloudy
7 PM
13°
Overcast
8 PM
12°
Cloudy
9 PM
12°
Clear
10 PM
12°
Overcast
11 PM
11°
Cloudy
3-Day Forecast
Daily overview for Half Moon Bay, California
Today
Moderate rain
15°
/
10°
🌧️ 86% chance of rain
💧 Avg. humidity: 74%
💨 Max wind: 40.7 km/h
🌧️ Total precip: 5.68 mm
☀️ UV Index: 1.3
🌅 Sunrise: 06:39 AM
🌇 Sunset: 07:43 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Partly Cloudy
15°
/
9°
🌧️ 0% chance of rain
💧 Avg. humidity: 78%
💨 Max wind: 23 km/h
🌧️ Total precip: 0.01 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:37 AM
🌇 Sunset: 07:44 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Overcast
12°
/
10°
🌧️ 0% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 25.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:36 AM
🌇 Sunset: 07:45 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Half Moon Bay
Plan your trip to Half Moon Bay, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Half Moon Bay?
Current conditions in Half Moon Bay: Overcast, temperature 12°C, humidity 100%.
What is the best time to visit Half Moon Bay?
The best time to visit Half Moon Bay is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Half Moon Bay?
Half Moon Bay is located at approximately 37.5° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Half Moon Bay?
The wettest period in Half Moon Bay is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Half Moon Bay?
For visits to Half Moon Bay during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Half Moon Bay in?
Half Moon Bay is located in United States, in the state of California.
What are the public holidays in Half Moon Bay in 2026?
View the 2026 public holidays for Half Moon Bay on our Holidays page.
What are the GPS coordinates used for the weather forecast in Half Moon Bay?
The weather forecast for Half Moon Bay uses coordinates 37.4636, -122.4286.