Half Moon Bay surfForecast / Washington / USA

information circle12 Day Weather and Surf, issued 4 pm Friday 29 Aug 2025 PDT
Forecast update in hr  min  s Forecast update imminent
Half Moon Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Half Moon Bay sea temperature is
14.4° C
(Which is 1.1°C colder than average for this time of year)


Best Forecast Surf Conditions for Half Moon Bay this week:

The surf forecast for Half Moon Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 29) at 11PM. The primary swell is predicted to be 0.5m and 18s period with a secondary swell of 0.4m and 7s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Half Moon Bay in the next 12 days are 0.7m 17s and forecast to arrive on Sunday (Aug 31) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Saturday (Aug 30) at 5AM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Fri 29th Aug)1.5ft (0.5m) 18s
Best Surf 2AM (Mon 1st Sep)2ft (0.6m) 17s
Most Powerful 8PM (Sun 31st Aug)2.5ft (0.7m) 17s

Table - best surf conditions forecast for Half Moon Bay over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Very mild (max 16°C on Sat afternoon, min 13°C on Sat morning). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Very mild (max 18°C on Tue afternoon, min 13°C on Tue morning). Wind will be generally light.

Fri
29
Saturday
30
Sunday
31
Monday
01
Tuesday
02
Wednesday
03
Thursday
04
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
1
0
0
0
0
0
2
1
0
1
0
0
0
0
0
0
0
0
0
1
Swell
Height Map
Wave Height (m) & direction (?)
0.4
SW
0.5
SW
0.5
SW
0.5
SW
0.6
SW
0.5
SW
0.6
SW
0.6
SW
0.7
SW
0.7
SW
0.7
SW
0.7
SW
0.7
SW
0.6
SW
0.6
SW
0.5
SW
0.4
SW
0.4
SW
0.4
SW
0.6
SW
1.2
WNW
Period(s) (?)14181816161617171716161615151515141616168
Wave
Graph
(?)Metric surfscale
Energy (?)142205172161271301268334326292287295350176211232183230241301308
Wind
(km/h)
10
WSW
5
SSW
5
WSW
15
NW
15
NNW
15
NW
15
WNW
5
NW
10
WNW
15
NW
10
N
10
NNW
20
NW
15
NNW
15
NW
25
NW
20
NW
15
NW
20
NW
10
NW
10
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crossglasscrossononononglasscross-
on
oncross-
on
cross-
on
oncross-
on
ononononononon
High Tide
/ height (m)
5:06PM
2.46
6:21AM
1.80
5:46PM
2.38
7:35AM
1.71
6:41PM
2.32
8:59AM
1.71
7:53PM
2.30
10:14AM
1.81
9:06PM
2.35
11:08AM
1.96
10:10PM
2.47
11:49AM
2.12
11:04PM
2.60
12:26PM
2.28
Low Tide
/ height (m)
11:51PM
0.42
11:15AM
1.14
12:50AM
0.49
12:09PM
1.33
2:00AM
0.49
1:39PM
1.44
3:11AM
0.41
3:02PM
1.41
4:11AM
0.26
4:07PM
1.26
5:01AM
0.07
5:00PM
1.05
5:43AM
-0.10
Fri
29
Saturday
30
Sunday
31
Monday
01
Tuesday
02
Wednesday
03
Thursday
04
Sunrise--6:31--6:33--6:35--6:35--6:37--6:39--6:39
Sunset8:01--8:00--7:58--7:55--7:53--7:52--7:50--
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
cloud
part cloud
part cloud
cloud
Rain (mm)
---------------------
Temp. °C151415161516161515161516181416161414151415
Feels °C (?)141415141314141415151415151114131112131214
  • 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

Eyeball surf reportRecent Eyeball Surf Reports for Washington

  1. weather stationWind Update Continuing clean conditions at Half Moon Bay (calm at BUOY-WPTW1 1 km from Half Moon Bay). 0.4m 7s swell from the WSW with a 0.3m 3s local chop from the SSW and a 0.3m 14s groundswell from the SW. 3 swells combining to make bigger set waves.

    Half Moon Bay
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1 h 11 min ago

4 km/h
W
Clean
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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.


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 12 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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