Half Moon Bay surfForecast / Washington / USA

information circle16 Day Weather and Surf, issued 10 am Saturday 18 Apr 2026 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
10.7° C
(Which is normal 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 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Apr 18) at 2PM. The primary swell is predicted to be 0.4m and 13s period with a secondary swell of 0.4m and 10s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Half Moon Bay in the next 16 days are 3.0m 12s and forecast to arrive on Wednesday (Apr 22) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Thursday (Apr 23) at 11AM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Sat 18th Apr)1.5ft (0.4m) 13s
Best Surf 5AM (Thu 23rd Apr)8ft (2.5m) 12s
Most Powerful 5PM (Wed 22nd Apr)10ft (3.0m) 12s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Very mild (max 18°C on Sun afternoon, min 8°C on Sat morning). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Tue morning. Very mild (max 10°C on Tue morning, min 7°C on Thu morning). Wind will be generally light.

Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
0
1
1
0
1
2
0
0
0
0
0
2
3
3
3
2
1
1
0
1
Swell
Height Map
Wave Height (m) & direction (?)
0.4
SW
0.4
SW
1
WSW
1
WSW
1.2
WSW
1.1
W
1.2
W
1
W
0.8
WNW
0.7
WNW
0.7
W
0.9
W
2.1
WNW
3
WNW
2.5
WNW
2.4
WNW
2
WNW
1.4
WNW
1.4
WNW
1.3
WNW
1.1
WNW
Period(s) (?)13148881311101010161413121211111010109
Wave
Graph
(?)Metric surfscale
Energy kJ (?)6369125123184401348218133982393291365227619991440976373363283207
Wind
(km/h)
15
ESE
10
WSW
5
SE
15
E
15
W
10
N
5
S
15
WSW
10
WSW
15
W
15
NW
20
W
15
WSW
15
SSW
20
SSE
20
S
10
SW
5
N
5
NW
20
NW
10
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
crossglasscross-
off
cross-
on
cross-
on
cross-
off
cross-
on
crosscross-
on
oncross-
on
crosscross-
off
cross-
off
cross-
off
crosscross-
on
ononcross-
on
High Tide
/ height (m)
2:39PM
2.59
2:15AM
3.17
3:30PM
2.53
2:56AM
3.15
4:24PM
2.42
3:42AM
3.06
5:21PM
2.30
4:36AM
2.89
6:25PM
2.20
5:39AM
2.68
7:34PM
2.17
6:53AM
2.48
8:42PM
2.23
Low Tide
/ height (m)
8:02AM
-0.49
8:00PM
0.62
8:48AM
-0.56
8:43PM
0.77
9:36AM
-0.52
9:29PM
0.93
10:29AM
-0.38
10:23PM
1.07
11:27AM
-0.20
11:28PM
1.18
12:32PM
-0.01
12:46AM
1.21
1:41PM
0.13
2:11AM
1.10
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Sunrise6:22--6:22--6:20--6:18--6:16--6:15--6:13--
Sunset-8:07--8:09--8:10--8:12--8:14--8:15--8:15-
cloud
cloud
part cloud
cloud
part cloud
part cloud
cloud
part cloud
cloud
light rain
light rain
cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
Rain (mm)
---------31----------
Temp. °C1114131518121212121010101010991010111210
Feels °C (?)711101116910810866665468986
  • 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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