Half Moon Bay Surf Break

Lat Long: 46.91° N 124.12° W

Half Moon Bay 48 hour detailed Surf Forecast

Issued: 4 pm 11 Sep 2026 (local time)

Forecast update in  hr  min

Today's Half Moon Bay sea temperature is
16.6°C
1.5° 

Half Moon Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Half Moon Bay today (12 Sep):

  • Afternoon surf: Afternoon surf (12 Sep, local time) - 2.5ft (0.8m), 16s period with SW swell.
  • Evening surf: Evening surf (12 Sep, local time) - 3ft (0.9m), 16s period with SW swell.

The current surf forecast for Half Moon Bay at 12AM is: 0.9m 16s primary swell from a Southwest direction and 1.1m 10s secondary swell from a West-northwest direction (forecast issued at 04:00pm September 11). The wind direction is predicted to be cross-shore.

Time (PDT) & DateWave HeightWave Period
Morning (12 Sep)--
Afternoon (12 Sep)2.5ft (0.8m)16s
Evening (12 Sep)3ft (0.9m)16s

Table - waves today at Half Moon Bay. (Swell directed towards the surf break)


Short Range Forecast

Light rain (total 8mm), mostly falling on Sat night. Very mild (max 16°C on Fri afternoon, min 12°C on Sat night). Wind will be generally light.

Fri
11
Saturday
12
Sunday
13
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
Rating
(10 max)
1
1
1
1
2
2
2
2
1
0
2
2
1
1
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SW
16
0.8
SW
16
0.9
SW
16
0.9
SW
16
0.9
SW
16
0.9
SW
15
0.9
SW
15
0.9
SW
15
0.8
SW
15
0.8
SW
14
0.8
SW
14
0.8
SW
14
0.8
SW
14
0.7
SW
14
0.6
SW
14
0.6
SW
14
1.1
WNW
8
1.2
WNW
8
1.2
WNW
8
1.1
WNW
8
Wave Graph
Metric surfscale
Energy kJ
318
306
367
367
358
344
322
318
258
251
245
241
245
203
167
167
164
176
163
151
Wind (km/h)
10
SW
5
WSW
5
WNW
5
NNE
10
E
5
ENE
5
ENE
5
SW
10
SW
15
WSW
0
WNW
5
S
15
SW
15
SW
20
SSW
20
WSW
20
WSW
20
WSW
15
WSW
15
WSW
Wind State
cross
cross
cross-on
cross
cross-off
cross-off
cross-off
glassy
cross
cross-on
glassy
glassy
cross
cross
cross-off
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
1:47PM2.80m
1:57AM2.76m
2:22PM2.86m
2:43AM2.64m
2:54PM2.85m
Low Tide
7:39PM0.07m
7:54AM-0.02m
8:21PM-0.03m
8:30AM0.20m
9:03PM-0.05m
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
light rain
light rain
part cloud
part cloud
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:36
7:34
7:31
 mm
1
4
2
1
Temp °C
16
16
15
15
14
14
13
15
15
15
14
14
12
13
14
15
15
15
15
15
Feels °C
14
14
14
14
12
13
11
14
13
13
14
14
10
11
11
12
12
12
13
13
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Half Moon Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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