San Francisco and Marin · Wednesday, Sep 23

Stinson Beach

Updated Tue, Sep 22, 5:30 PM PDT

When to go

9:00 AM–11:00 AM

Looks good · Low confidence

5.4–5.5 ft · Offshore waves · not face height

Wind: 3.7 kt · onshore

Forecast details

Light wind should keep the water smoother.

Other wind windows

Plan around the wind

The best available upcoming daylight wind sample to compare with the wave evidence. This compares wind only; wave size, tide suitability, and hazards can change your choice.

8:00 AM–10:00 AM · America/Los_Angeles
Light wind · up to 3.0 kt · reported gusts up to 3.3 kt
Offshore waves: 5.4–5.6 ft across the period. Surf height unavailable. Tide data available; check the local tide response.
Wind source time: Sep 22, 4:45 PM PDT. This is not the model run issue time.

How these periods are chosen

The planner prefers three consecutive hourly samples covering two daylight hours, but retains shorter one- or two-sample evidence when that is all the forecast provides. Light wind means at most 6 kt. Moderate offshore means at most 12 kt from land toward the sea when shore orientation is verified. Strong wind or known gusts of 20 kt or more remain visible as cautions instead of making the entire comparison disappear. These are comparison labels, not locally tested surf-quality or safety ratings. Missing gusts remain unknown. Terrain shelter, currents, closures, and your ability are not assessed.

Forecast confidence

Returned marine grid point is 5.8 km from the mapped spot. Provider grid resolution is not established for this response.
Reference model hour: 14 hours from now; historical residuals do not measure forecast lead-time error.
No accepted local model for these inputs: missing history, unsupported direction/period/height, or failed historical validation.
A mapped coordinate does not establish nearshore grid resolution or terrain/shelter accuracy.

Wind SSW 2.5 kt

Tide 3.5 ft rising

Wave, wind and tide details

Offshore model swellWNW 5.1 ft @ 7sValid 2026-09-23 08:00 · America/Los_AngelesMarine grid 37.8750, -122.7083 · offshore model, not a local measurement

Offshore model sea5.6 ft @ 8.8sSignificant wave height including wind waves and swell; not breaking surfValid 2026-09-23 08:00 · America/Los_Angeles

Model windSSW 2.5 ktonshoreValid 2026-09-23 08:00 · America/Los_Angeles2.2 kt onshore component

Tide3.5 ftrisingNOAA Point Reyes 9415020 · 30 km from spot · predicted height relative to MLLWRetrieved Sep 22, 5:31 PM PDT · provider issue time unavailable68% of adjacent local low–high range · descriptive, not a safety rating

Surf height unavailable. Coastal and offshore waves are not breaking-wave heights.

Surf and wind

Recommended window: No recommended window

Breaking surf is not reliably resolved. Hourly offshore swell and wind inputs are listed below.

Hourly forecast

Hourly surf forecast for Stinson Beach
Time	Wind	Tide	Offshore swell
12 AM	WNW 3.1 ktcross-shore	3 ftfalling	WNW 5.6 ft @ 6s
1 AM	WSW 2.3 ktonshore	2 ftfalling	WNW 5.4 ft @ 6s
2 AM	SW 2.8 ktonshore	1.5 ftfalling	WNW 5.3 ft @ 6s
3 AM	SW 2.9 ktonshore	1 ftnear low	WNW 5.3 ft @ 6s
4 AM	WSW 1.8 ktonshore	1 ftrising	WNW 5.4 ft @ 6s
5 AM	WSW 2.2 ktonshore	1.5 ftrising	WNW 5.4 ft @ 7s
6 AM	S 3.5 ktonshore	2 ftrising	WNW 5.3 ft @ 7s
7 AM	S 1.6 ktcross-shore	2.5 ftrising	WNW 5.2 ft @ 7s
8 AM	SSW 2.5 ktonshore	3.5 ftrising	WNW 5.1 ft @ 7s
9 AM	SSW 2.4 ktonshore	4 ftrising	WNW 5.0 ft @ 7s
10 AM	SSW 3 ktonshore	4.5 ftnear high	WNW 4.9 ft @ 7s
11 AM	WSW 3.7 ktonshore	4.5 ftfalling	WNW 4.7 ft @ 7s
Noon	W 4.7 ktonshore	4 ftfalling	WNW 4.7 ft @ 7s
1 PM	W 5.3 ktonshore	3.5 ftfalling	WNW 4.7 ft @ 7s
2 PM	W 6.5 ktcross-shore	3 ftfalling	WNW 4.7 ft @ 7s
3 PM	W 6.9 ktcross-shore	2.5 ftnear low	WNW 4.5 ft @ 7s
4 PM	WNW 9 ktcross-shore	2.5 ftrising	WNW 4.2 ft @ 6s
5 PM	WNW 8.9 ktcross-shore	3 ftrising	WNW 4.0 ft @ 6s
6 PM	NW 7.2 ktcross-shore	3.5 ftrising	WNW 4.1 ft @ 6s
7 PM	NW 4.7 ktcross-shore	4 ftrising	WNW 4.1 ft @ 6s
8 PM	NW 4.7 ktcross-shore	5 ftrising	WNW 4.1 ft @ 6s
9 PM	NW 4.8 ktcross-shore	5.5 ftnear high	WNW 4.4 ft @ 6s
10 PM	NW 5.8 ktcross-shore	5 ftfalling	WNW 4.7 ft @ 6s
11 PM	NW 5.6 ktcross-shore	4 ftfalling	WNW 5.0 ft @ 6s

12 AMUnavailable

WindWNW 3.1 ktcross-shoreTide3 ftfallingOffshore swellWNW 5.6 ft @ 6s

1 AMUnavailable

WindWSW 2.3 ktonshoreTide2 ftfallingOffshore swellWNW 5.4 ft @ 6s

2 AMUnavailable

WindSW 2.8 ktonshoreTide1.5 ftfallingOffshore swellWNW 5.3 ft @ 6s

3 AMUnavailable

WindSW 2.9 ktonshoreTide1 ftnear lowOffshore swellWNW 5.3 ft @ 6s

4 AMUnavailable

WindWSW 1.8 ktonshoreTide1 ftrisingOffshore swellWNW 5.4 ft @ 6s

5 AMUnavailable

WindWSW 2.2 ktonshoreTide1.5 ftrisingOffshore swellWNW 5.4 ft @ 7s

6 AMUnavailable

WindS 3.5 ktonshoreTide2 ftrisingOffshore swellWNW 5.3 ft @ 7s

7 AMUnavailable

WindS 1.6 ktcross-shoreTide2.5 ftrisingOffshore swellWNW 5.2 ft @ 7s

8 AMUnavailable

WindSSW 2.5 ktonshoreTide3.5 ftrisingOffshore swellWNW 5.1 ft @ 7s

9 AMUnavailable

WindSSW 2.4 ktonshoreTide4 ftrisingOffshore swellWNW 5.0 ft @ 7s

10 AMUnavailable

WindSSW 3 ktonshoreTide4.5 ftnear highOffshore swellWNW 4.9 ft @ 7s

11 AMUnavailable

WindWSW 3.7 ktonshoreTide4.5 ftfallingOffshore swellWNW 4.7 ft @ 7s

NoonUnavailable

WindW 4.7 ktonshoreTide4 ftfallingOffshore swellWNW 4.7 ft @ 7s

1 PMUnavailable

WindW 5.3 ktonshoreTide3.5 ftfallingOffshore swellWNW 4.7 ft @ 7s

2 PMUnavailable

WindW 6.5 ktcross-shoreTide3 ftfallingOffshore swellWNW 4.7 ft @ 7s

3 PMUnavailable

WindW 6.9 ktcross-shoreTide2.5 ftnear lowOffshore swellWNW 4.5 ft @ 7s

4 PMUnavailable

WindWNW 9 ktcross-shoreTide2.5 ftrisingOffshore swellWNW 4.2 ft @ 6s

5 PMUnavailable

WindWNW 8.9 ktcross-shoreTide3 ftrisingOffshore swellWNW 4.0 ft @ 6s

6 PMUnavailable

WindNW 7.2 ktcross-shoreTide3.5 ftrisingOffshore swellWNW 4.1 ft @ 6s

7 PMUnavailable

WindNW 4.7 ktcross-shoreTide4 ftrisingOffshore swellWNW 4.1 ft @ 6s

8 PMUnavailable

WindNW 4.7 ktcross-shoreTide5 ftrisingOffshore swellWNW 4.1 ft @ 6s

9 PMUnavailable

WindNW 4.8 ktcross-shoreTide5.5 ftnear highOffshore swellWNW 4.4 ft @ 6s

10 PMUnavailable

WindNW 5.8 ktcross-shoreTide5 ftfallingOffshore swellWNW 4.7 ft @ 6s

11 PMUnavailable

WindNW 5.6 ktcross-shoreTide4 ftfallingOffshore swellWNW 5.0 ft @ 6s

Tide

NOAA Point Reyes 9415020 · 30 km from spot · MLLW

Interpolated tide height Recommended window

About this spot

Model-grid forecast requested at the mapped coordinate; reef, headland, and nearshore transformations are unresolved. Beach break.

Mapped spot coordinate: 37.9, -122.65.

Mainland · Coast not verified · Ocean-facing bearing 225° · Location provenance

Model request point: Stinson Beach (37.9, -122.65). Model output times describe valid conditions; the provider does not expose the model run issue time in this response.

Forecast sources

Data coverage 3/5 sources

Source availability is not forecast accuracy. Where an empirical model passes historical testing, its error and interval coverage are shown above. Source count cannot increase that confidence.

Coverage tier A · US_CA · spot-level model point

Official breaking-surf report not connected for San Francisco and MarinUnavailableUnavailable · Unavailable

US National Weather Service Surf Zone Forecast
No current identified MTR/EKA surf-zone product passed office, zone, issue-time, and spot-geometry validation.UnavailableNo source time
Coastal Data Information Program THREDDS
No named CDIP transect is connected without a reviewed shoreline endpoint, shore normal, depth, and break-exposure contract.UnavailableNo source time
NOAA NDBC real-time station files
Current buoy observations are not forecasts for the selected future date.Not applicableNo source time
NOAA CO-OPS Tides and Currents API
NOAA Point Reyes 9415020 · 30 km from spot; predicted high/low events above MLLW, converted to feet. Timestamp is retrieval time; provider issue time is not supplied.CurrentSep 22, 5:31 PM PDT
Open-Meteo Marine API
1 of 1 configured model points availableCurrentSep 22, 4:45 PM PDT
Open-Meteo Weather API
1 of 1 configured model points availableCurrentSep 22, 4:45 PM PDT
Surf-Forecast public pages
Spot discovery and break-specific HTML fallbackNot applicableNo source time
Surfline public spot pages
Break-specific comparison, cams, and metadataNot applicableNo source time

How best guesses are made

Best guesses combine usable wave and wind evidence, with qualitative confidence and specific limitations. A missing tide or local surf-height model does not prevent useful guidance. Tide levels use the named station datum; their effect at this break remains uncertain. Wind direction is relative to the mapped beach orientation, without calibrated terrain or shelter effects. The comparison is a heuristic, not a measured quality rating.