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Surf Forecasts:

Half Moon Bay surfForecast / Washington / USA

information circle12 Day Weather and Surf, issued 4 pm Tuesday 21 Oct 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
13.2° C
 (Which is slightly warmer than usual)

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 Wednesday (Oct 22) at 8AM. The primary swell is predicted to be 2.3m and 15s period with a secondary swell of 0.3m and 16s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Half Moon Bay in the next 12 days are 4.5m 16s and forecast to arrive on Friday (Oct 24) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Thursday (Oct 23) at 5PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Wed 22nd Oct)7.5ft (2.3m) 15s
Best Surf11AM (Thu 23rd Oct)11ft (3.5m) 19s
Most Powerful 5AM (Fri 24th Oct)15ft (4.5m) 16s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Heavy rain (total 22mm), heaviest during Fri morning. Very mild (max 16°C on Tue afternoon, min 10°C on Tue night). Mainly strong winds.

Days 3-6 Weather Summary Heavy rain (total 67mm), heaviest during Fri afternoon. Very mild (max 12°C on Fri night, min 10°C on Sat night). Winds increasing (light winds from the ENE on Fri afternoon, strong winds from the WNW by Sat night).

Tue
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
!
4
2
2
3
!
!
!
!
!
2
2
1
0
1
2
2
2
2
2
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
4
W
3
W
2
W
1.8
W
2
W
3.5
W
4
WSW
3.5
W
3.5
W
3.5
W
3
W
2.5
W
2.2
W
3.5
W
3
W
2.4
W
2.3
W
3
W
2.5
W
1.9
W
1.3
WNW
Period(s) (?)171614141219171515151514141413121213121211
Wave
Graph
(?)Metric surfscale
Energy kJ (?)9593439316081190103774488749622051954836376227101891486225991756153927471806959407
Wind
(km/h)
10
ENE
20
E
30
SSW
10
SW
15
SE
30
SSE
35
S
40
S
5
W
15
ENE
30
SW
35
SSW
35
SSW
40
WNW
15
W
15
WSW
10
W
10
NW
10
WSW
20
E
25
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		cross-
off		crossoffcross-
off		cross-
off		cross-
off		cross-
on		cross-
off		crosscross-
off		cross-
off		cross-
on		cross-
on		cross-
on		cross-
on		oncross-
on		cross-
off		cross-
off
High Tide
/ height (m)
2:02AM
2.47
1:38PM
2.87
2:42AM
2.43
2:06PM
2.85
3:22AM
2.37
2:33PM
2.80
4:03AM
2.30
3:02PM
2.72
4:47AM
2.20
3:34PM
2.62
5:38AM
2.10
4:13PM
2.50
6:38AM
2.04
Low Tide
/ height (m)
7:30PM
-0.04
7:27AM
0.81
8:05PM
-0.08
8:00AM
0.97
8:39PM
-0.05
8:32AM
1.12
9:15PM
0.01
9:04AM
1.25
9:53PM
0.11
9:37AM
1.37
10:35PM
0.22
10:16AM
1.46
11:25PM
0.33
11:16AM
1.53
Tue
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Sunrise--7:43--7:45--7:46--7:48--7:48--7:50--7:52
Sunset6:19--6:16--6:15--6:13--6:12--6:09--6:07--
clear
part cloud
cloud
rain showers
part cloud
cloud
part cloud
mod rain
heavy rain
heavy rain
rain showers
mod rain
mod rain
mod rain
light rain
rain showers
rain showers
rain showers
part cloud
cloud
cloud
Rain (mm)
---4---612171069643111---
Temp. °C16141413131314141311121212111011111112118
Feels °C (?)13119101178789105514678892
  • 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 The wind is still cross-off at Half Moon Bay (light winds from the E at BUOY-WPTW1 1 km from Half Moon Bay). A 3.8m long period groundswell from the WNW is too big for here

    1 hour 50 minutes ago Half Moon Bay
Expand
<
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1 h 50 min ago

17 km/h
E
Cross-Off
Please reload the page to see if there are any updates.

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.

View detailed surf forecast for Half Moon Bay at:
surf-forecast.com

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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