Surf Forecasts:
Moonstone surf forecast from 6 Aug 2026:
- Best quality surf: Sunday 9 Aug, 2AM (local time) - 3ft (0.9m), 16s period, SSW swell with glassy winds.
- Most powerful swell: Saturday 8 Aug, 8AM (local time) - 3ft (0.9m), 18s period, SSW swell with 438 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 8AM (local time) - 1.5ft (0.5m), 14s period with SW swell.
Best Forecast Surf Conditions for Moonstone this week:
The surf forecast for Moonstone over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 06) at 8AM. The primary swell is predicted to be 0.5m and 14s period with a secondary swell of 0.4m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Moonstone in the next 16 days are 0.9m 18s and forecast to arrive on Saturday (Aug 08) at 8AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 6th Aug) | 1.5ft (0.5m) 14s |
| Best Surf | 2AM (Sun 9th Aug) | 3ft (0.9m) 16s |
| Most Powerful | 8AM (Sat 8th Aug) | 3ft (0.9m) 18s |
Table - best surf conditions forecast for Moonstone over the next 16 days.
The Lowdown
Alright, let's get into it, folks. Rusty here with the long-range look at our local stretch.
Right off the bat, the start of the forecast period is pretty flat and quiet at Moonstone. There’s just not enough to get excited about through the first few days; the swell is tiny and the conditions are poor. We’ve got a bit of a patience game on our hands here.
We start seeing some life on Thursday, August 8th. The morning session is looking interesting. The wind will be glassy, and a 3ft SSW swell with a solid 18-second period hits. We're looking at a moderate combined wave energy (408). That’s a clean, small but lined-up groundswell, perfect for cruising on a longboard. Crowds can pop here sometimes, but for these conditions everyone will be in a good mood.
The standout by a long shot is Sunday, August 9th. This is the one to circle on your calendar. The morning is looking excellent. Wind is glassy again, and we get a 4ft swell shifting around to the WNW with an 11-second period. The combined wave energy jumps to a strong 585. That’s proper. The water temp is sitting at 58°, which is a bit colder than normal for this time of year, so don't forget the booties.
After that, the energy sticks around but the good conditions sort of fade. The following week starts to get messy, especially from Tuesday the 18th onwards. Strong WNW winds start to bull-doze the surf, creating choppy, lumpy conditions. By Thursday, August 20th, the wind is up, and we see a short-period, messy 7ft WNW windswell roll in, clocking strong energy (823). Honestly, with the forecast being so choppy with moderate cross-onshore winds and that short period, it looks more interesting for the kite surfers than for a paddle session.
So to wrap it up: the first few days are a write-off. Thursday the 8th morning is a gentle warm-up, but Sunday the 9th morning is your best bet for clean, quality waves. The second week looks promising energy-wise but the wind is likely to ruin the party until things potentially clean up again. Forecasts can change, so keep your eyes peeled.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Fri afternoon, min 15°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Sat afternoon, min 15°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
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) | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 18 | SSW 19 | SSW 19 | SSW 17 | SSW 18 | SSW 16 | SSW 16 | WNW 11 | SSW 15 | SSW 14 | SSW 14 | WNW 10 | WNW 9 | WNW 9 | SSW 18 | SW 18 |
Wave Graph  | |||||||||||||||||||||
 kJ | 71 | 72 | 71 | 85 | 83 | 124 | 210 | 289 | 267 | 348 | 206 | 366 | 300 | 314 | 239 | 235 | 231 | 148 | 142 | 209 | 316 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | on | glassy | on | on | cross-on | glassy | on | glassy | glassy | on | glassy | cross | cross-on | glassy | cross-on | on | cross-on |
High Tide | 3:34PM1.95m | 5:34AM1.22m | 4:31PM2.02m | 7:29AM1.27m | 5:35PM2.11m | 8:39AM1.37m | 6:40PM2.21m | 9:24AM1.46m | 7:41PM2.31m | 10:02AM1.55m | 8:38PM2.37m | 10:38AM1.63m | 9:30PM2.38m | ||||||||
Low Tide | 8:30AM0.96m | 11:15PM0.64m | 9:16AM1.09m | 00:31AM0.47m | 10:29AM1.20m | 1:34AM0.29m | 11:59AM1.23m | 2:28AM0.13m | 1:17PM1.20m | 3:16AM0.01m | 2:22PM1.12m | 4:00AM-0.04m | 3:20PM1.02m | 4:41AM-0.02m | |||||||
 | |  | |  | | | | | | | | | |  | | | | | | | |
 | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — |
 | — | 8:04 | — | — | 8:02 | — | — | 8:01 | — | — | 8:00 | — | — | 8:00 | — | — | 7:59 | — | — | 7:58 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 20 | 15 | 20 | 21 | 16 | 21 | 22 | 17 | 22 | 23 | 19 | 23 | 23 | 17 | 21 | 22 | 16 | 20 | 21 | 16 |
Feels °C | 18 | 19 | 14 | 20 | 20 | 15 | 21 | 21 | 17 | 22 | 23 | 19 | 23 | 22 | 16 | 20 | 22 | 16 | 20 | 21 | 16 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | WNW 7 | WNW 7 | WNW 9 | SW 13 | WNW 8 | SSW 19 | SSW 19 | SSW 17 | SSW 18 | SSW 16 | SSW 16 | WNW 11 | SSW 15 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 10 | WNW 9 |
| kJ | 58 | 31 | 31 | 46 | 83 | 40 | 210 | 289 | 267 | 348 | 206 | 366 | 300 | 305 | 168 | 235 | 231 | 130 | 130 | 145 | 133 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 13 | SSW 20 | SW 13 | SW 13 | SW 13 | SSW 13 | WNW 8 | SSW 12 | WNW 8 | SSW 15 | SW 21 | WNW 6 | SSW 14 | SSW 13 | SSW 13 | S 13 | SSW 18 | SW 18 |
| kJ | 71 | 72 | 71 | 85 | 75 | 85 | 84 | 82 | 114 | 25 | 56 | 52 | 266 | 72 | 53 | 220 | 139 | 137 | 123 | 209 | 316 |
Swell 3 Height (m) Direction Period (s) | S 13 | SW 11 | SW 12 | SSW 20 | S 12 | SSW 18 | WNW 8 | S 11 | WNW 6 | SW 12 | SSE 9 | SSW 12 | SW 11 | S 12 | SSW 14 | SSW 11 | SW 20 | SSW 19 | SSW 19 | S 12 | SSW 12 |
| kJ | 31 | 19 | 36 | 75 | 25 | 124 | 28 | 9 | 7 | 35 | 8 | 83 | 19 | 3 | 239 | 24 | 98 | 148 | 142 | 77 | 47 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | WNW 9 | — | — | WNW 8 | NW 8 | — | WNW 8 | — | — | WNW 10 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 52 | — | — | 28 | 32 | — | 44 | — | — | 314 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 139 | 91 | 48 | 139 | 174 | 0 | 139 | 174 | 1 | 0 | 174 | 0 | 0 | 174 | 0 | 48 | 139 | 0 | 48 | 139 | 23 |
Best forecast wave conditions in San Luis Obispo | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Moonstone 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 Moonstone Surf forecast
The above surf forecast table for Moonstone provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Moonstone can be found by selecting the local surf guide option on the grey menu. Our Moonstone 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 (Moonstone) 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 Moonstone 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.
Moonstone is 39 km (24 miles) from Paso Robles. If you plan a vacation in San Luis Obispo, look for hotels and other accommodation in Paso Robles. Paso Robles has rooms for a wide range of budgets as well as car hire and transport links.
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