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Santa Maria Rivermouth Surf Forecast
/ CAL – Santa Barbara (36 breaks) / California (404 breaks) /
Surf Forecasts:
Santa Maria Rivermouth surfForecast / CAL – Santa Barbara / USA
12 Day Weather and Surf, issued 4 am Thursday 18 Sep 2025 PDT
Best Forecast Surf Conditions for Santa Maria Rivermouth this week:
The surf forecast for Santa Maria Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 8AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.7m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Santa Maria Rivermouth in the next 12 days are 1.3m 10s and forecast to arrive on Friday (Sep 19) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 18th Sep) | 2.5ft (0.7m) 14s |
| Best Surf | 8AM (Thu 18th Sep) | 2.5ft (0.7m) 14s |
| Most Powerful | 2AM (Fri 19th Sep) | 4.5ft (1.3m) 10s |
Table - best surf conditions forecast for Santa Maria Rivermouth over the next 12 days.
Short Range Forecast Light rain (total 2mm), mostly falling on Thu morning. Very mild (max 19°C on Thu morning, min 15°C on Fri night). Wind will be generally light. | Days 3-6 Weather Summary Some drizzle, heaviest during Mon night. Warm (max 21°C on Mon morning, min 15°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| 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) (?) | 14 | 10 | 10 | 10 | 10 | 10 | 13 | 13 | 6 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 214 | 211 | 320 | 234 | 216 | 122 | 111 | 57 | 73 | 99 | 131 | 119 | 157 | 291 | 291 | 291 | 265 | 242 | 183 | 155 | 115 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | glass | on | glass | cross- off | cross- on | cross- on | glass | cross- on | cross- on | cross- on |
High Tide / height (m) | 9:16AM 1.71 | 8:24PM 2.05 | 9:42AM 1.78 | 9:10PM 2.03 | 10:06AM 1.84 | 9:52PM 1.96 | 10:29AM 1.89 | 10:33PM 1.87 | 10:52AM 1.93 | 11:15PM 1.77 | 11:15AM 1.95 | 11:59PM 1.64 | 11:39AM 1.95 | 12:48AM 1.52 | |||||||
Low Tide / height (m) | 2:28PM 0.99 | 3:15AM 0.30 | 3:12PM 0.86 | 3:46AM 0.37 | 3:52PM 0.75 | 4:14AM 0.48 | 4:31PM 0.65 | 4:40AM 0.61 | 5:09PM 0.59 | 5:05AM 0.75 | 5:48PM 0.55 | 5:28AM 0.89 | 6:30PM 0.54 | ||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| Sunrise | 6:47 | - | - | 6:48 | - | - | 6:48 | - | - | 6:48 | - | - | 6:50 | - | - | 6:50 | - | - | 6:50 | - | - |
| Sunset | - | 7:05 | - | - | 7:04 | - | - | 7:01 | - | - | 7:00 | - | - | 6:59 | - | - | 6:58 | - | - | 6:57 | - |
 |  |  |  | |  | | | | | | | | |  | |  | | | | | |
Rain (mm) | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - |
| Temp. °C | 19 | 19 | 17 | 18 | 18 | 15 | 18 | 17 | 15 | 18 | 18 | 17 | 21 | 20 | 18 | 19 | 18 | 17 | 17 | 17 | 16 |
| Feels °C (?) | 19 | 18 | 17 | 17 | 16 | 14 | 16 | 14 | 14 | 16 | 16 | 18 | 21 | 19 | 19 | 19 | 17 | 17 | 16 | 14 | 14 |
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Recent Eyeball Surf Reports for CAL - Santa Barbara
Continuing clean conditions at Santa Maria Rivermouth (calm at Santa Maria Airport 20 km from Santa Maria Rivermouth). 0.7m 10s swell from the WNW with a 0.6m 5s windswell, also from the WNW and a 0.5m 10s swell, also from the WSW as well as a 0.3m 14s groundswell, also from the SW. 4 swells combining to make bigger set waves.
20 km away, 2 h 39 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 Santa Maria Rivermouth 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 Santa Maria Rivermouth Surf forecast
The above surf forecast table for Santa Maria Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Santa Maria Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Santa Maria Rivermouth 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 (Santa Maria Rivermouth) 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 Santa Maria Rivermouth 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.
Santa Maria Rivermouth is 20 km (12 miles) from Arroyo Grande. If you plan a vacation in Santa Barbara, look for hotels and other accommodation in Arroyo Grande. Arroyo Grande has rooms for a wide range of budgets as well as car hire and transport links.
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