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Photo: Half Moon Bay bench overlooking ocean.jpg via Wikidata Q3782546 License

Half Moon Bay

Bay

Cool todaycamping-nearby

Interactive map not available

Current water conditions

Water temp
69°F
21°C
Cool water — ease in carefully. Cool enough to cause cold-water shock on a sudden entry. Get in gradually, let your breathing settle, and keep an eye on weaker swimmers.

Live data from NOAA buoy AAMC1 (22.1 mi away), as of Aug 21, 1:30 AM UTC. Conditions are for general information only and can change quickly — always judge the water in person and follow posted advisories before swimming.

Weather at Half Moon Bay

H: 61° L: 56°
Fog
Fog
58°
|
Feels like 54°
Precipitation
68%
Humidity
100%
Wind
11 mph
UV Index
0.2
Water Conditions:
🥶Too cold for most swimmers🌧️Rain expected
12 AM
Fog
56°
3 AM
Mist
57°
6 AM
Mist
56°
9 AM
Mist
58°
12 PM
Mist
60°
3 PM
Overcast
61°
6 PM
Fog
58°
9 PM
Fog
57°

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Frequently asked questions

Where is Half Moon Bay?
Half Moon Bay is a bay in California.
What is the water temperature at Half Moon Bay?
As of August 21, 2026, the water temperature at Half Moon Bay in California is 69°F (21°C), measured by NOAA buoy AAMC1, 22.1 miles away.
Can you swim at Half Moon Bay?
There is no fixed answer for Half Moon Bay: whether it is safe to swim there on a given day depends on the water temperature, recent rainfall, and any advisories posted at Half Moon Bay in California. Check current water conditions before you go, and follow posted signs and local guidance.
What amenities does Half Moon Bay have?
Visitor-listed amenities at Half Moon Bay include camping-nearby.

Visitor Reviews

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Best Times to Visit

🧥
Right Now
Cool weather - dress warmly
General Tips:
  • Weekday mornings (8–10 AM) are typically less crowded
  • Check the forecast 2–3 days ahead for best planning
  • Avoid holiday weekends for a quieter experience
Best Seasons:
☀️ Summer (Jun-Aug)🍂 Fall (Sep-Nov)🌸 Spring (Mar-May)

Location & Contact

California

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Amenities

Camping nearby