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The Rivermouth Surf Forecast
/ CAL – Santa Cruz (30 breaks) / California (404 breaks) /
Surf Forecasts:
The Rivermouth surfForecast / CAL – Santa Cruz / USA
12 Day Weather and Surf, issued 10 pm Wednesday 17 Sep 2025 PDT
Best Forecast Surf Conditions for The Rivermouth this week:
The surf forecast for The Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 5AM. The primary swell is predicted to be 0.7m and 15s period with a secondary swell of 1.2m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at The Rivermouth in the next 12 days are 1.6m 10s and forecast to arrive on Thursday (Sep 18) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 12s period and expected on Sunday (Sep 21) at 8PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 18th Sep) | 2.5ft (0.7m) 15s |
| Best Surf | 5AM (Thu 18th Sep) | 2.5ft (0.7m) 15s |
| Most Powerful | 5PM (Thu 18th Sep) | 5ft (1.6m) 10s |
Table - best surf conditions forecast for The Rivermouth over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 22°C on Sat afternoon, min 15°C on Thu night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Sun afternoon, min 16°C on Sat night). Wind will be generally light. | |||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wed 24 | ||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | ||
Rating (10 max) | ||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||
| Period(s) (?) | 15 | 10 | 10 | 10 | 10 | 10 | 14 | 14 | 10 | 9 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 11 | 11 | |
Wave (?)Graph  | ||||||||||||||||||||||
 kJ (?) | 234 | 370 | 480 | 360 | 245 | 204 | 144 | 99 | 85 | 103 | 187 | 174 | 113 | 359 | 352 | 359 | 339 | 265 | 229 | 180 | 160 | |
Wind (km/h) | ||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross- on | cross- on | glass | cross- on | cross- on | glass | cross- on | cross- on | glass | cross- on | glass | glass | cross- on | cross- on | glass | on | cross- on | glass | cross- on | cross- on | |
High Tide / height (m) | 9:59AM 1.44 | 8:48PM 1.62 | 10:29AM 1.46 | 9:40PM 1.56 | 10:55AM 1.47 | 10:27PM 1.48 | 11:18AM 1.47 | 11:12PM 1.40 | 11:37AM 1.47 | 11:55PM 1.30 | 11:55AM 1.48 | 12:38AM 1.22 | 12:13PM 1.50 | |||||||||
Low Tide / height (m) | 2:50AM -0.08 | 2:58PM 0.67 | 3:30AM -0.06 | 3:43PM 0.52 | 4:05AM 0.00 | 4:23PM 0.40 | 4:36AM 0.10 | 5:00PM 0.30 | 5:05AM 0.24 | 5:35PM 0.23 | 5:31AM 0.41 | 6:09PM 0.20 | 5:55AM 0.58 | 6:43PM 0.18 | ||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wed 24 | ||||||||||||||||
| Sunrise | - | 6:52 | - | - | 6:52 | - | - | 6:52 | - | - | 6:54 | - | - | 6:54 | - | - | 6:56 | - | - | 6:56 | - | |
| Sunset | - | - | 7:10 | - | - | 7:09 | - | - | 7:07 | - | - | 7:06 | - | - | 7:05 | - | - | 7:02 | - | - | 7:01 | |
 |  |  |  |  | | | | | | | | | | | | | | | | | ||
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
| Temp. °C | 19 | 18 | 20 | 16 | 19 | 20 | 17 | 20 | 22 | 18 | 20 | 23 | 19 | 22 | 22 | 16 | 17 | 19 | 17 | 19 | 21 | |
| Feels °C (?) | 20 | 18 | 19 | 16 | 19 | 19 | 17 | 19 | 21 | 18 | 20 | 22 | 20 | 22 | 22 | 17 | 18 | 19 | 17 | 19 | 20 | |
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Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for CAL - Santa Cruz
Continuing clean conditions at The Rivermouth (calm at Santa Cruz wx 2 km from The Rivermouth). 0.6m 12s groundswell from the WSW with a 0.4m 14s groundswell, also from the WSW. 2 swells combining to make bigger set waves.
1 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 The 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 The Rivermouth Surf forecast
The above surf forecast table for The Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at The Rivermouth can be found by selecting the local surf guide option on the grey menu. Our The 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 (The 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 The 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.
The Rivermouth is 2 km (1 miles) from Santa Cruz. If you plan a vacation in Santa Cruz, look for hotels and other accommodation in Santa Cruz. Santa Cruz has rooms for a wide range of budgets as well as car hire and transport links.
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