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San Gregorio State Beach Surf Forecast
/ CAL – San Mateo (15 breaks) / California (404 breaks) /
Surf Forecasts:
San Gregorio State Beach surfForecast / CAL – San Mateo / USA
12 Day Weather and Surf, issued 10 am Tuesday 16 Sep 2025 PDT
Best Forecast Surf Conditions for San Gregorio State Beach this week:
The surf forecast for San Gregorio State Beach over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 19) at 8PM. The primary swell is predicted to be 1.3m and 10s period with a secondary swell of 0.6m and 14s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at San Gregorio State Beach in the next 12 days are 2.0m 10s and forecast to arrive on Thursday (Sep 18) at 5PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Fri 19th Sep) | 4.5ft (1.3m) 10s |
| Best Surf | 8AM (Mon 22nd Sep) | 5ft (1.5m) 11s |
| Most Powerful | 5PM (Thu 18th Sep) | 6.5ft (2.0m) 10s |
Table - best surf conditions forecast for San Gregorio State Beach over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 22°C on Tue morning, min 15°C on Wed night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 21°C on Sun afternoon, min 15°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 18 | 18 | 16 | 16 | 15 | 15 | 10 | 10 | 10 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 12 | 11 | 11 | 10 | 10 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 249 | 246 | 283 | 269 | 243 | 234 | 622 | 826 | 715 | 573 | 394 | 256 | 168 | 168 | 184 | 170 | 196 | 230 | 397 | 360 | 281 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross | cross- on | cross- on | cross- on | on | on | cross | cross | cross- on | glass | on | cross- on | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross |
High Tide / height (m) | 8:25AM 1.76 | 6:57PM 2.17 | 9:08AM 1.84 | 8:00PM 2.19 | 9:42AM 1.92 | 8:55PM 2.19 | 10:12AM 1.99 | 9:43PM 2.17 | 10:40AM 2.05 | 10:29PM 2.12 | 11:05AM 2.10 | 11:13PM 2.05 | 11:30AM 2.13 | 11:57PM 1.96 | |||||||
Low Tide / height (m) | 1:05PM 1.33 | 2:17AM 0.30 | 2:10PM 1.21 | 3:03AM 0.30 | 3:03PM 1.08 | 3:43AM 0.35 | 3:48PM 0.94 | 4:17AM 0.42 | 4:30PM 0.81 | 4:49AM 0.53 | 5:10PM 0.70 | 5:18AM 0.67 | 5:49PM 0.61 | ||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||
| Sunrise | 6:52 | - | - | 6:52 | - | - | 6:52 | - | - | 6:54 | - | - | 6:54 | - | - | 6:56 | - | - | 6:56 | - | - |
| Sunset | - | 7:15 | - | - | 7:14 | - | - | 7:13 | - | - | 7:10 | - | - | 7:09 | - | - | 7:07 | - | - | 7:07 | - |
 |  |  | |  |  | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 22 | 22 | 19 | 21 | 20 | 17 | 17 | 18 | 15 | 18 | 19 | 15 | 19 | 19 | 15 | 19 | 21 | 17 | 21 | 21 | 16 |
| Feels °C (?) | 23 | 22 | 18 | 20 | 19 | 16 | 16 | 17 | 15 | 17 | 18 | 15 | 19 | 18 | 14 | 18 | 19 | 16 | 20 | 20 | 14 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for CAL - San Mateo
calm at Half Moon Bay wx mean that is clean at San Gregorio State Beach. No surfable waves
1 h 18 min ago
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 San Gregorio State Beach 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 San Gregorio State Beach Surf forecast
The above surf forecast table for San Gregorio State Beach provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at San Gregorio State Beach can be found by selecting the local surf guide option on the grey menu. Our San Gregorio State Beach 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 (San Gregorio State Beach) 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 San Gregorio State Beach 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.
San Gregorio State Beach is 23 km (14 miles) from Redwood City. If you plan a vacation in San Mateo, look for hotels and other accommodation in Redwood City. Redwood City has rooms for a wide range of budgets as well as car hire and transport links.
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