Surf Forecasts:
Half Moon Bay surf forecast from 4 Sep 2026:
- Best quality surf: Friday 4 Sep, 11AM (local time) - 3.5ft (1.0m), 9s period, WNW swell with cross-offshore winds.
- Most powerful swell: Friday 11 Sep, 2AM (local time) - 3ft (0.9m), 17s period, SW swell with 499 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 11AM (local time) - 3.5ft (1.0m), 9s 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 Friday (Sep 04) at 11AM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 0.8m and 6s. 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 0.9m 17s and forecast to arrive on Friday (Sep 11) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Fri 4th Sep) | 3.5ft (1.0m) 9s |
| Best Surf | 11AM (Fri 4th Sep) | 3.5ft (1.0m) 9s |
| Most Powerful | 2AM (Fri 11th Sep) | 3ft (0.9m) 17s |
Table - best surf conditions forecast for Half Moon Bay over the next 16 days.
Short Range ForecastLight rain (total 2mm), mostly falling on Fri afternoon. Very mild (max 19°C on Sat afternoon, min 12°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Wed afternoon, min 12°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | WNW 9 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | WNW 9 | SW 17 | SW 17 | SW 18 | SW 17 |
Wave Graph  | |||||||||||||||||||||
 kJ | 181 | 311 | 304 | 290 | 260 | 302 | 291 | 273 | 174 | 132 | 132 | 167 | 89 | 87 | 62 | 62 | 127 | 135 | 241 | 366 | 499 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross | cross-off | on | cross-off | glassy | on | on | cross-on | cross-on | cross | cross | on | cross | cross | on | cross-on | glassy | on | cross |
High Tide | 6:36PM2.63m | 8:47AM1.84m | 7:56PM2.60m | 10:04AM1.97m | 9:16PM2.65m | 11:04AM2.16m | 10:26PM2.74m | 11:52AM2.36m | 11:26PM2.83m | 12:33PM2.55m | 00:20AM2.87m | 1:11PM2.70m | 1:10AM2.84m | ||||||||
Low Tide | 12:02PM1.15m | 1:47AM0.10m | 1:32PM1.26m | 3:03AM0.04m | 2:59PM1.20m | 4:11AM-0.08m | 4:13PM1.00m | 5:07AM-0.20m | 5:13PM0.74m | 5:55AM-0.27m | 6:06PM0.48m | 6:37AM-0.26m | 6:54PM0.24m | ||||||||
 |  |  |  |  |  | | | | | | | | |  | | | | | | | |
 | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:45 | — | — | 6:47 | — | — |
 | — | 7:50 | — | — | 7:47 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:39 | — | — | 7:37 | — |
mm | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 16 | 16 | 19 | 16 | 15 | 16 | 15 | 15 | 15 | 15 | 15 | 18 | 16 | 20 | 22 | 18 | 19 | 22 | 20 |
Feels °C | 14 | 14 | 14 | 14 | 15 | 14 | 15 | 14 | 12 | 14 | 13 | 14 | 14 | 15 | 15 | 19 | 19 | 16 | 18 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | W 10 | WNW 10 | WNW 4 | WNW 6 | WNW 9 | WNW 8 | WNW 11 | SW 18 | SW 17 |
| kJ | 181 | 177 | 169 | 140 | 113 | 86 | 291 | 273 | 174 | 132 | 132 | 167 | 49 | 54 | 8 | 35 | 113 | 99 | 202 | 366 | 499 |
Swell 2 Height (m) Direction Period (s) | SSW 6 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | WNW 8 | W 13 | WNW 8 | W 12 | W 11 | W 11 | SW 14 | SW 13 | SW 13 | W 10 | SW 19 | SW 17 | SW 17 | SW 17 | SW 17 |
| kJ | 44 | 311 | 304 | 290 | 260 | 302 | 59 | 87 | 41 | 101 | 62 | 83 | 89 | 87 | 62 | 48 | 127 | 135 | 241 | 297 | 413 |
Swell 3 Height (m) Direction Period (s) | SW 19 | SSW 6 | SSW 6 | S 6 | W 14 | W 13 | WNW 13 | W 13 | W 12 | WNW 8 | WNW 7 | WNW 6 | NW 6 | SW 19 | WNW 9 | SW 13 | SW 13 | WNW 11 | SW 13 | W 21 | — |
| kJ | 125 | 21 | 6 | 5 | 37 | 55 | 59 | 87 | 75 | 32 | 31 | 17 | 10 | 58 | 27 | 62 | 61 | 43 | 42 | 9 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NW 3 | — | — | WNW 8 | WNW 4 | — | — | — | — | NW 3 | — | — | — | — | — | WNW 10 | WNW 10 |
| kJ | — | — | — | — | 1 | — | — | 86 | 12 | — | — | — | — | 5 | — | — | — | — | — | 205 | 197 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 4 | 4 | 0 | 104 | 0 | 0 | 1119 | 52 | 160 | 278 | 1 | 5 | 166 | 5 | 5 | 52 | 4 | 0 | 141 | 4 |
Best forecast wave conditions in Washington State | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.
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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