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Stormy Petrel

Free surf forecasts · No paywall, no ads.

Data sources

NWPS — nearshore wave model
WAVEWATCH III — spectral swell
HRRR — 3 km wind
NDBC — realtime buoys
CO-OPS — tide predictions

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Forecasts refresh every 8 h · buoys every 3 h

California

Shell Beach (North)

2.0Updated 0 min ago

Face

3.1ft

13s period

Swell

SSW

207°

Windcross

5 mph

NNW

Tide

↑2.1 ft

rising

Conditions

Clean

swell mix · 50% wind sea

Swell breakdown

NWPS height + WW3

P1 (primary)

WNW

2.6ft

7s

59%

P2 (secondary)

SSW

1.7ft

13s

25%

P3 (tertiary)

S

1.4ft

11s

17%

Swell components (ft) · next 48h

Wind speed (mph) · next 48h

Tide (ft) · next 48h

Spot info

Break—

Tide preference—

Optimal conditions

SwellSW 232°

WindNE offshore

Tide—

Break—

Nearest buoy

BuoyNDBC 46218

Hs3.9 ft

Tp8s

DirNW

Water65°F

Reading9/1/2026, 2:56:00 PM

View NDBC station page →

7-day forecast

Time

Rating

Face

Period

Swell

Wind

Tide

Tue, Sep 1

11am

3.0

13s

SSW202°

9mphcross-on

3.6ft↑

2pm

3.5

13s

SSW202°

15mphcross-on

5.4ft↓

5pm

3.5

11s

S185°

11mphcross

3.8ft↓

8pm

3.2

10s

WSW255°

4mphcross

1.2ft↑

11pm

3.0

13s

SSW203°

3mphoffshore

1.5ft

Wed, Sep 2

2am

2.7

13s

SSW193°

3mphoffshore

3.3ft↓

5am

2.7

13s

SSW195°

3mphoffshore

3.2ft↓

8am

2.7

12s

S191°

4mphoffshore

2.3ft↑

11am

2.7

12s

SSW192°

5mphcross

3.4ft↑

2pm

3.8

11s

S188°

11mphcross

5.4ft↓

5pm

4.1

12s

SSW197°

10mphcross

4.6ft↓

8pm

4.4

12s

SSW195°

5mphoffshore

1.9ft↓

11pm

4.1

12s

S190°

1mphcross

0.8ft

Thu, Sep 3

2am

3.8

12s

SSW193°

5mphcross-off

2.2ft↑

5am

3.6

10s

WSW247°

6mphcross-off

3.2ft↓

8am

3.6

10s

WSW247°

6mphcross

2.8ft

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