Half Moon Bay Surf Break

Lat Long: 46.91° N 124.12° W

Half Moon Bay Surf Forecast and Surf Report

Issued: 10 pm 13 Sep 2026 (local time)

Forecast update in  hr  min

Today's Half Moon Bay sea temperature is
15.8°C
0.8° 

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


Half Moon Bay surf forecast from 14 Sep 2026:

  • Best quality surf: Monday 14 Sep, 8AM (local time) - 3ft (0.9m), 8s period, WNW swell with cross-offshore winds.
  • Most powerful swell: Monday 21 Sep, 2AM (local time) - 2.5ft (0.7m), 19s period, SW swell with 364 kJ wave energy.
  • Next surfable swell (1★+): Monday 14 Sep, 8AM (local time) - 3ft (0.9m), 8s period with WNW swell.

Best Forecast Surf Conditions for Half Moon Bay this week:

The surf forecast for Half Moon Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 14) at 8AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.5m and 13s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Half Moon Bay in the next 16 days are 0.7m 19s and forecast to arrive on Monday (Sep 21) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Mon 14th Sep)3ft (0.9m) 8s
Best Surf 8AM (Mon 14th Sep)3ft (0.9m) 8s
Most Powerful 2AM (Mon 21st Sep)2.5ft (0.7m) 19s

Table - best surf conditions forecast for Half Moon Bay over the next 16 days.


Short Range Forecast

Mostly dry. Very mild (max 18°C on Wed afternoon, min 13°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 18°C on Thu morning, min 12°C on Sat morning). Wind will be generally light.

Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
2
0
0
1
0
0
0
0
1
1
0
1
1
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
WNW
8
1
WNW
8
0.4
SW
18
0.9
WNW
8
0.4
SW
17
0.5
SW
17
0.4
SW
16
0.9
WNW
8
0.9
WNW
8
1.1
WNW
8
1.2
WNW
8
1.2
WNW
8
1.2
WNW
8
1.2
WNW
8
0.5
SW
20
0.6
WSW
19
0.6
WSW
19
0.5
SW
19
0.6
SW
18
Wave Graph
Metric surfscale
Energy kJ
130
127
102
83
76
147
86
88
88
142
202
197
197
188
188
251
251
175
252
Wind (km/h)
15
WSW
5
SSW
10
WNW
10
NNW
5
NNW
15
NW
10
NE
10
NE
20
NNW
10
NNE
5
N
15
WNW
10
SW
10
W
15
WNW
20
NNW
15
NNW
25
NW
15
N
Wind State
cross
cross-off
on
on
glassy
on
cross
cross
on
cross-on
cross-on
on
cross
cross-on
on
on
cross-on
on
cross-on
High Tide
3:27AM2.48m
3:26PM2.80m
4:12AM2.31m
3:58PM2.71m
5:00AM2.13m
4:31PM2.60m
5:54AM1.97m
5:10PM2.47m
7:00AM1.85m
6:02PM2.34m
8:17AM1.82m
7:14PM2.25m
Low Tide
9:03PM-0.05m
9:05AM0.45m
9:44PM-0.01m
9:40AM0.72m
10:27PM0.10m
10:16AM0.98m
11:13PM0.25m
10:56AM1.20m
00:08AM0.41m
11:51AM1.38m
1:14AM0.51m
1:10PM1.47m
2:26AM0.52m
part cloud
cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:52
6:52
6:54
6:56
6:56
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:30
7:28
7:25
7:23
7:22
7:20
 mm
Temp °C
16
15
16
15
15
16
15
17
18
15
18
17
15
14
14
14
13
14
14
Feels °C
15
14
15
13
14
14
13
16
15
12
17
14
14
13
12
11
10
10
11
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Half Moon Bay Surf forecast

The above surf forecast table for Half Moon Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Half Moon Bay can be found by selecting the local surf guide option on the grey menu. Our Half Moon Bay surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Half Moon Bay) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Half Moon Bay may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Are you planning a vacation in Washington State? If you are looking for accommodation near Half Moon Bay, camping, hotels and condos and appartments in Washington State, consider staying in Aberdeen which is 25 km (16 miles) away. Other places in and around Washington State where you can find information about places to rent, and car hire include Astoria which is 83 km (52 miles) away, Centralia and Olympia.

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