TARLINE

Half Moon Bay

NDBC 46012 · Uncrewed surface vehicle · 37.356, -122.881 · 209 m depth

Reporting · last observation Oct 21, 2026, 12:00 AM

View on NDBC →
Significant wave height
6.6 ft observed Oct 21, 2026, 12:00 AM · NDBC 46012
Dominant period
12.0 s observed Oct 21, 2026, 12:00 AM · NDBC 46012
Average period
– s not in the latest transmission
Mean wave direction
– not in the latest transmission
Water temperature
65.3 °F observed Oct 21, 2026, 12:00 AM · NDBC 46012
Wind
5.8 kt observed Oct 21, 2026, 12:00 AM · NDBC 46012
Gust
7.8 kt observed Oct 21, 2026, 12:00 AM · NDBC 46012
Wind direction
SE 140° observed Oct 21, 2026, 12:00 AM · NDBC 46012
Air temperature
62.2 °F observed Oct 21, 2026, 12:00 AM · NDBC 46012

Significant wave height here is the total measured sea state at this mooring. It is not the height breaking at any beach; each beach page models that separately from its own exposure.

Station sources & timestamps3 sources

  • Latest station reportNDBC, NOAA

    Half Moon Bay (46012)

    Observed
    when the instrument took this reading
    Successful fetch
    recorded time for the last accepted fetch; not proof the value changed (see source timing details below)

    Latest report received from this physical station; individual fields can have older observation times. This is the recorded start of the most recent successful live poll across this station's products, not response completion or proof that every field refreshed.

    Open the NDBC, NOAA source ↗

  • Offshore swellNDBC, NOAA

    Half Moon Bay (46012)

    Observed
    when the instrument took this reading
    Successful fetch
    recorded time for the last accepted fetch; not proof the value changed (see source timing details below)

    One instrument's own reading of open water, selected independently of the water temperature station. The observation time is the oldest of the wave fields shown, so it can overstate a single field's age but never understate it. The fetch timestamp records the start of a successful poll of this field's provider and product, not response completion or the age of the reading.

    Open the NDBC, NOAA source ↗

  • Water temperatureNDBC, NOAA

    Half Moon Bay (46012)

    Observed
    when the instrument took this reading
    Successful fetch
    recorded time for the last accepted fetch; not proof the value changed (see source timing details below)

    One instrument's own reading, selected independently of the wave station. The fetch timestamp records the start of a successful poll of this field's provider and product, not response completion or the age of the reading.

    Open the NDBC, NOAA source ↗

All times are Pacific. An upstream issue time is shown only when recorded. A feed response time is not the provider's model initialization or publication time. Unlisted timestamps were not recorded or do not apply.

Partitions · computed here from this station's spectrum

This station publishes no directional spectrum, so no partitions can be computed.

Station Observations — Half Moon BayWhat this station measuresThese are instrument measurements at this station, which may be an offshore buoy or a fixed coastal platform. Significant wave height is not a beach-specific breaking height. Each beach page states its own modeled breaking height separately.NDBC 46012 · raw observations · past 168 h
Significant Wave Height–ftDominant Period–sSwell From–Water–°FLatest Wave Heightloading observations
Significant Wave Height, Observed
Dominant Period, Observed
Swell direction · 7 days · every 6h

Loading swell direction…
7-Day Forecast
Half Moon BayWhat a wave model forecast isOpen-Meteo Marine runs a wave model over this station's location. Every point on these lanes is model output rather than an instrument reading, and the offshore heights shown are the open-water sea state, not the height breaking at a beach.46012 · 7-day swell forecast · Open-Meteo Marine
Offshore Wave Height, Forecast
Dominant Period, Forecast

Loading the wave-model forecast for 46012…

Swell Direction, Every 6h