10:00 AM–1:00 PM
1 NWS alert for this location.
Coastal Flood Advisory
Oct 26, 9:00 AM – Oct 29, 3:00 PM PDT
Up to 1.9ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways.
Oct 26, 9:00 AM – Oct 29, 3:00 PM PDT
Up to 1.9ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways.
COASTAL SURF PLANNER
Half Moon Bay Surf Conditions
General coastal surf planning context. Conditions are not break-specific.
0–100 composite planning score · not a raw environmental measurement
Best Surf Planning Window10:00 AM–1:00 PM
Confidence: High
6:00 AM–9:00 AM
NEXT 24 HOURS
24-Hour Surf Conditions Forecast
0–100 score · Local time · Active NWS alert hours show NOT RECOMMENDED
10:00 AM
100High
11:00 AM
100High
12:00 PM
100High
1:00 PM
100High
2:00 PM
97.5High
3:00 PM
97.5High
4:00 PM
97.5High
5:00 PM
100High
6:00 PM
100High
7:00 PM
96High
8:00 PM
93.5High
9:00 PM
93.5High
10:00 PM
93.5High
11:00 PM
87.2High
12:00 AM
87.2High
1:00 AM
87.2High
2:00 AM
84.8High
3:00 AM
84.8High
4:00 AM
84.8High
5:00 AM
84.8High
6:00 AM
84.8High
7:00 AM
87.2High
8:00 AM
91.2High
9:00 AM
NOT RECOMMENDEDAlert active
BREAKDOWN
Why this score?
Factor scores are normalized from 0–100. They are scoring inputs, not raw weather or ocean measurements.
Wave height score100
Wave period score100
Wind score100
Weather score100
Daylight score100
COASTAL CONDITIONS
Wave, wind and weather context
Wave height3.0 ft
Wave period9.0 sec
Wind0.0 mph
Gust4.6 mph
Rain chance0%
TIDE CONTEXT
Today’s tide turning points
Tide is shown as context and is not included in the v1 composite score.
Low4:02 AM1.5 ft
High10:08 AM6.1 ft
Low4:59 PM-0.5 ft
High11:21 PM4.7 ft
EXPLANATION
What is driving today’s result?
NWS alert details: Coastal Flood Advisory (Oct 26, 9:00 AM – Oct 29, 3:00 PM PDT). The Coastal Flood Advisory begins after the 10:00 AM–1:00 PM planning window, so it does not directly reduce that window's numerical score; the official alert still takes priority once its stated period begins. Today's 100 score is mainly supported by 3.0 ft wave height, 9 sec wave period, and 0 mph winds.
Keep planning
Detailed Half Moon Bay tide forecastView tide page →Half Moon Bay fishing conditionsView fishing conditions →Compare Surfing pilot locationsSurfing hub →TRANSPARENCY
Data sources & methodology
Tides & water observations: NOAA/NOS/CO-OPS. NOAA station: Pillar Point Harbor, Half Moon Bay, CA (9414131).
Weather, wind, waves & alerts: NOAA National Weather Service.
Surf Conditions Score & Surf Planning Window: calculated by CoastalNow from the source data above using published rule-based methodology.
Daylight context: calculated locally by CoastalNow and used as a low-weight planning input.
Surf Conditions Score is a planning metric, not a safety guarantee or a break-specific forecast. Official warnings and local guidance always take priority. Conditions are not break-specific.