Half Moon Bay Surf Break

Lat Long: 46.91° N 124.12° W

Half Moon Bay Surf Forecast and Surf Report

Issued: 10 pm 20 Sep 2026 (local time)

Forecast update in  hr  min

Today's Half Moon Bay sea temperature is
16.4°C
1.8° 

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 21 Sep 2026:

  • Best quality surf: Tuesday 22 Sep, 11PM (local time) - 4.5ft (1.3m), 11s period, W swell with glassy winds.
  • Most powerful swell: Monday 21 Sep, 11PM (local time) - 6ft (1.8m), 13s period, W swell with 1,121 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 22 Sep, 11PM (local time) - 4.5ft (1.3m), 11s period with W 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 Tuesday (Sep 22) at 11PM. The primary swell is predicted to be 1.3m and 11s period with a secondary swell of 0.8m and 16s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Half Moon Bay in the next 16 days are 1.8m 13s and forecast to arrive on Monday (Sep 21) at 11PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Tue 22nd Sep)4.5ft (1.3m) 11s
Best Surf11PM (Tue 22nd Sep)4.5ft (1.3m) 11s
Most Powerful11PM (Mon 21st Sep)6ft (1.8m) 13s

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


Short Range Forecast

Mostly dry. Very mild (max 16°C on Mon afternoon, min 12°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 11mm), heaviest on Thu night. Very mild (max 15°C on Fri afternoon, min 11°C on Thu afternoon). Wind will be generally light.

Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
Saturday
26
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
1
2
3
1
2
0
0
0
0
0
1
1
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)
0.7
SW
19
0.8
SW
18
1.4
WNW
14
1.7
W
13
1.5
W
12
1.4
W
11
1.3
W
11
1.5
W
11
1.6
WNW
11
1.5
WNW
11
1.3
WNW
10
1.4
WNW
10
1
WNW
10
1.7
WNW
10
0.9
WNW
10
1.6
WNW
10
1.2
WNW
9
1
WNW
9
0.4
SW
18
Wave Graph
Metric surfscale
Energy kJ
364
370
733
957
636
483
388
545
657
476
356
380
209
551
163
523
248
166
92
Wind (km/h)
15
NNW
10
NW
20
WNW
15
NW
15
WNW
15
WNW
5
SSE
10
SSE
15
NW
10
NNE
20
N
15
NNW
25
WNW
20
WNW
10
W
10
NE
10
NE
20
NNW
5
NNW
Wind State
on
on
on
on
on
on
glassy
cross-off
on
cross
cross-on
cross-on
cross-on
on
cross-on
cross
cross
on
cross-on
High Tide
8:31PM2.24m
10:29AM2.00m
9:38PM2.31m
11:09AM2.15m
10:35PM2.40m
11:44AM2.30m
11:25PM2.50m
12:16PM2.46m
00:11AM2.57m
12:48PM2.62m
00:56AM2.61m
1:18PM2.75m
1:40AM2.61m
Low Tide
3:32AM0.45m
3:42PM1.27m
4:24AM0.33m
4:36PM1.05m
5:06AM0.21m
5:20PM0.80m
5:43AM0.13m
6:02PM0.54m
6:18AM0.10m
6:41PM0.28m
6:52AM0.14m
7:20PM0.05m
clear
cloud
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
cloud
light rain
light rain
rain showers
rain showers
clear
part cloud
part cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:01
7:01
7:03
7:05
7:05
7:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:15
7:14
7:12
7:09
7:07
7:06
 mm
1
2
7
1
Temp °C
13
15
16
15
15
15
14
14
15
14
12
11
13
14
15
14
13
15
14
Feels °C
11
14
14
12
13
13
12
12
13
11
9
8
8
10
12
13
10
11
11
  • Map Icons:
  • Break
  • 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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